阅读说明：本技术 一种船用多接口磁力起动系统及其控制方法 (Marine multi-interface magnetic starting system and control method thereof ) 是由 司向飞 李国锋 王翠云 姚世强 盛怡 逯玉成 于 2021-08-11 设计创作，主要内容包括：本发明涉及一种船用多接口磁力起动系统,包括磁力起动器,所述磁力起动器上的变压器原边从三相主电路取电,副边为磁力起动器的控制回路供电,所述三相主电路的一端连接有动力电源,另一端连接有电动机所述控制回路上依次串联有手动停止开关、自动停止开关、自动起动支路与接触器,所述接触器控制接触器主触点的接通,所述自动停止开关与自动起动支路的连通分别由自动控制系统控制。该系统具有本地和远程的手动起停接口、自动起停接口,且接口数量易于扩展,便于磁力起动器的标准化设计磁力起动器具有本地、远程的手动起停接口、自动起停接口,且接口数量易于扩展,便于磁力起动器的标准化设计。(The invention relates to a marine multi-interface magnetic starting system which comprises a magnetic starter, wherein a primary side of a transformer on the magnetic starter is powered from a three-phase main circuit, a secondary side of the transformer supplies power to a control loop of the magnetic starter, one end of the three-phase main circuit is connected with a power supply, the other end of the three-phase main circuit is connected with a motor, a manual stop switch, an automatic starting branch circuit and a contactor are sequentially connected in series on the control loop, the contactor controls the connection of a main contact of the contactor, and the connection of the automatic stop switch and the automatic starting branch circuit is respectively controlled by an automatic control system. The system is provided with a local and remote manual start-stop interface and an automatic start-stop interface, the number of the interfaces is easy to expand, the magnetic starter convenient for the standardized design of the magnetic starter is provided with the local and remote manual start-stop interface and the automatic start-stop interface, the number of the interfaces is easy to expand, and the standardized design of the magnetic starter is convenient.)

1. The marine multi-interface magnetic starting system is characterized by comprising a magnetic starter (200), wherein the primary side of a transformer (202) on the magnetic starter (200) is powered from a three-phase main circuit, the secondary side of the transformer supplies power to a control loop of the magnetic starter (200), one end of the three-phase main circuit is connected with a power supply (101), the other end of the three-phase main circuit is connected with an electric motor (300), a manual stop switch, an automatic starting branch circuit and a contactor (2090) are sequentially connected in series on the control loop, the contactor (2090) controls the connection of a main contact (2091) of the contactor, and the communication between the automatic stop switch and the automatic starting branch circuit is controlled by an automatic control system respectively.

2. The marine multi-interface magnetic starting system according to claim 1, wherein the automatic starting branch is connected in parallel with a manual starting branch.

3. The marine multi-interface magnetic starting system according to claim 2, wherein the manual starting branch is connected in parallel with a first remote control switch (207) and a first local control switch (208), wherein the first remote control switch (207) controls the connection of the control loop of the magnetic starter (200) through remote operation, and the first local control switch (208) controls the connection of the control loop of the magnetic starter (200) through local manual operation.

4. The marine multi-interface magnetic starting system according to claim 1, characterized in that the automatic control system comprises a ship controller (400), an automatic starting relay (4010) and an automatic stopping relay (4020) which are connected in parallel with each other are connected to the ship controller (400), the automatic starting relay (4010) controls the connection of an automatic starting relay contact (4011) on an automatic starting branch, and the automatic stopping relay (4020) controls the connection of an automatic stopping relay contact (4021) on an automatic stopping switch.

5. The marine multi-interface magnetic starting system according to claim 4, characterized in that a heptafluoropropane control system (600) is further connected to the ship controller (400), the heptafluoropropane control system (600) comprises a sensor, and the heptafluoropropane control system (600) sends a command to the ship controller (400) after receiving a signal sent by the sensor, so that the ship controller (400) controls a contact on a control loop of the magnetic starter.

6. The marine multi-interface magnetic starting system according to claim 1, wherein the power source (101) is an ac distribution board, the motor (300) is a three-phase ac auxiliary motor, the ac distribution board supplies power to the three-phase ac auxiliary motor through a circuit breaker (102) with an overcurrent protection function, the magnetic starter (200) controls start and stop of the three-phase ac auxiliary motor, a thermal relay (2010) is arranged on the three-phase main circuit, and the thermal relay (2010) controls a first auxiliary contact (2011) of the thermal relay.

7. The marine multi-interface magnetic start system of claim 1 wherein the contactor (2090) further controls the closing of a first auxiliary contactor contact (2092), the first auxiliary contactor contact (2092) forming a self-locking circuit when closed.

8. The marine multi-interface magnetic starter system of claim 1, wherein the manual stop switch comprises a second local control switch (203) and a second remote control switch (204) connected in series, wherein the second local control switch (203) controls the communication of the control loop of the magnetic starter through local manual operation, and the second remote control switch (204) controls the communication of the control loop of the magnetic starter (200) through remote operation.

9. The marine multi-interface magnetic starting system according to claim 1, characterized in that a self-locking knob switch (210) is further connected in parallel to the control loop, the self-locking knob switch (210) controls a mode switching relay (2110), the mode switching relay (2110) controls a mode switching relay first contact (2111) and a mode switching relay second contact (2112), the mode switching relay first contact (2111) is connected in series with an automatic starting relay contact (4011), and the mode switching relay second contact (2112) is connected in series with an automatic stopping relay contact (4021).

10. A control method of a marine multi-interface magnetic starter is characterized by comprising the following steps:

s001, in an initial state, the automatic starting relay (4010) and the automatic stopping relay (4020) are in a release state, and the magnetic starter (200) has no automatic control instruction;

s002, automatically starting the fan, when the whole ship controller (400) receives a fan starting request instruction sent by the heptafluoropropane control system (600), or when the whole ship controller (400) receives a fan stopping request instruction sent by the heptafluoropropane control system (600), the highest monomer temperature value in the ship-mounted power lithium battery management system (500) is over-temperature, or the environmental temperature value in the power lithium battery management system (500) is over-temperature, and the whole ship controller (400) does not receive the fan stopping request instruction sent by the heptafluoropropane control system (600), the whole ship controller (400) controls the automatic stopping relay (4020) to keep a release state, and the controller (400) controls the automatic starting relay (4010) to suck for 500ms and then release;

s003, an automatic stop state, wherein the whole ship controller (400) detects that the highest monomer temperature value of the power lithium battery management system (500) is recovered due to overtemperature, the environmental temperature value in the power lithium battery management system (500) is recovered due to overtemperature, and the heptafluoropropane control system (600) does not request to start a fan, the whole ship controller (400) controls the automatic stop relay (4020) to continuously release, at the moment, the automatic stop relay contact (4021) acts for 500ms, the control loop power supply of the magnetic starter (200) is cut off, the corresponding contactor (2090) loses power, the corresponding contactor main contact (2091) and the contactor first auxiliary contact (2092) simultaneously act, and the main loop and the control loop are both lose power;

and S004, a heptafluoropropane release ending state, wherein after the whole ship controller (400) does not detect a fan stop command of the heptafluoropropane control system (600) for 1 hour, the state of the fan is transferred to the initial state of the step S001, and in the period, if the fire extinguishing process is finished.

Technical Field

The invention belongs to the technical field of magnetic starters, and relates to a marine multi-interface magnetic starting system and a control method thereof.

Background

The ship auxiliary turbine system contains a large number of ventilator sets and pumps, and relates to manual and automatic control of starting and stopping of an auxiliary motor and the pumps and overload, short circuit and thermal protection of the auxiliary motor and the pumps. According to the CCS (China Classification Society ) specification requirement, a motor (except for living and maintenance equipment) and a pump with rated power equal to or more than 1kW are supplied with power by an independent final branch, and an independent starter is preferably adopted to supply power to the electric towing device for control and protection. Compared with a ground power plant and a substation power station, the capacity of a ship power station, particularly a novel storage battery power station is small, and if a plurality of motors and pumps of an auxiliary system are started simultaneously, impact on the power station is large, so that a ship power system is unstable. With the emergence of new energy ships, particularly battery-powered ships (hereinafter referred to as electric ships), higher requirements are put on the starting and stopping control of motors and pumps of auxiliary systems.

For a small-capacity auxiliary motor and a small-capacity auxiliary pump of 0.5-10 kW, a full-pressure direct starting mode controlled by a contactor can be adopted, and an armature is attracted by utilizing electromagnetic force generated by current flowing through a coil of the contactor, so that the purpose of driving a mechanical linkage contact to attract or release is achieved, and the connection and the disconnection of related circuits are controlled. For a traditional magnetic starter, the control loop voltage is directly taken from a 400VAC main loop, the control switch operation of the traditional magnetic starter relates to higher main loop voltage, the harm to human bodies caused by accidental electric shocks is larger, the stress response of the electric shocks is larger, and particularly, people caused by the electric shocks fall and collide under the working conditions of ship inclination and swing.

Along with the popularization and application of electric propulsion ships and new energy power ships, the automation level of an engine room of the ship is gradually improved, and the automation degree of the ship is reduced to a certain extent by a large number of conventional magnetic starters of various fans, oil pumps and water pumps, wherein the magnetic starters only have a local manual control function; for a new energy power ship, particularly a pure battery power ship, the processes of ventilating and cooling of a power battery and a battery compartment where the power battery is located, extracting and diluting combustible gas in the battery compartment, releasing and extracting heptafluoropropane fire extinguishing gas in the battery compartment all relate to automatic control over a magnetic starter of a battery compartment ventilator, and a conventional magnetic starter only having a local manual control function cannot meet the automatic control requirements of multiple conditions; meanwhile, the magnetic starter which is installed in the cabin and only has local control needs to be manually operated in the cabin, and the starting condition needs to be artificially judged, so that the labor intensity of a crew is increased, and the optimal control of the power of the whole ship is not facilitated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a marine multi-interface magnetic starting system and a control method thereof, so that the magnetic starter is provided with a local and remote manual start-stop interface and an automatic start-stop interface, the number of the interfaces is easy to expand, and the standardized design of the magnetic starter is convenient.

In order to achieve the purpose, the invention adopts the following technical scheme:

a marine multi-interface magnetic starting system is characterized by comprising a magnetic starter, wherein a primary side of a transformer on the magnetic starter is powered from a three-phase main circuit, a secondary side of the transformer supplies power to a control loop of the magnetic starter, one end of the three-phase main circuit is connected with a power supply, the other end of the three-phase main circuit is connected with a motor, a manual stop switch, an automatic starting branch circuit and a contactor are sequentially connected onto the control loop in series, the contactor controls the connection of a main contact of the contactor, and the connection of the automatic stop switch and the automatic starting branch circuit is controlled by an automatic control system respectively.

Furthermore, a manual starting branch is connected in parallel to the automatic starting branch.

Further, a first remote control switch and a first local control switch are connected in parallel to the manual starting branch, wherein the first remote control switch controls the communication of the control loop of the magnetic starter through remote operation, and the first local control switch controls the communication of the control loop of the magnetic starter through local manual operation.

Furthermore, the automatic control system comprises a whole ship controller, the whole ship controller is connected with an automatic starting relay and an automatic stopping relay which are connected in parallel, the automatic starting relay controls the connection of an automatic starting relay contact on an automatic starting branch, and the automatic stopping relay controls the connection of an automatic stopping relay contact on an automatic stopping switch.

Further, a heptafluoropropane control system is connected to the ship controller and comprises a sensor, and the heptafluoropropane control system sends an instruction to the ship controller after receiving a signal sent by the sensor, so that the ship controller controls a contact on a control loop of the magnetic starter.

Further, the power supply is an alternating current distribution board, the motor is a three-phase alternating current auxiliary motor, the alternating current distribution board supplies power to the three-phase alternating current auxiliary motor through a circuit breaker with an overcurrent protection function, the magnetic starter controls the start and stop of the three-phase alternating current auxiliary motor, a thermal relay is arranged on the three-phase main circuit, and the thermal relay controls an auxiliary contact of the thermal relay.

Furthermore, the contactor also controls the connection of the auxiliary contact of the contactor, and a self-locking circuit is formed after the auxiliary contact of the contactor is connected.

Further, the manual stop switch comprises a second local control switch and a second remote control switch which are connected in series, wherein the second local control switch controls the communication of the control loop of the magnetic starter through local manual operation, and the second remote control switch controls the communication of the control loop of the magnetic starter through remote operation.

Furthermore, a self-locking knob switch is connected in parallel to the control loop, the self-locking knob switch controls a mode conversion relay, the mode conversion relay controls a first contact of the mode conversion relay and a second contact of the mode conversion relay, the first contact of the mode conversion relay is connected in series with a contact of the automatic starting relay, and the second contact of the mode conversion relay is connected in series with a contact of the automatic stopping relay.

A control method of a marine multi-interface magnetic starter is characterized by comprising the following steps:

s001, in an initial state, the automatic starting relay and the automatic stopping relay are in a release state, and the magnetic starter has no automatic control instruction;

s002, in an automatic starting state, when the whole ship controller receives a fan starting request instruction sent by a heptafluoropropane control system, the fan is started, or when the whole ship controller receives an over-temperature highest monomer temperature value in a ship-mounted power lithium battery management system, or an over-temperature ambient temperature value in the power lithium battery management system, and the whole ship controller does not receive a fan stopping request instruction sent by the heptafluoropropane control system, the whole ship controller controls an automatic stopping relay to keep a releasing state, and the controller controls the automatic starting relay to suck for 500ms and then release;

s003, in an automatic stop state, when a ship-wide controller detects that the highest monomer temperature value of a power lithium battery management system is recovered due to overtemperature, the environmental temperature value in the power lithium battery management system is recovered due to overtemperature, and a heptafluoropropane control system does not request to start a fan, the ship-wide controller controls an automatic stop relay to continuously release, at the moment, the contact of the automatic stop relay acts for 500ms, a control loop power supply of a magnetic starter is cut off, a corresponding contactor loses power, a corresponding contactor main contact and a contactor first auxiliary contact act simultaneously, and the main loop and the control loop lose power;

and S004, in the heptafluoropropane release finishing state, after the whole ship controller continues for 1h and does not detect a fan stop instruction of a heptafluoropropane control system, the state of the fan is transferred to the initial state of the step S001, and in the period, if the fire extinguishing process is finished.

Compared with the prior art, the invention has the following beneficial effects:

a multi-interface magnetic starting system for a ship is provided with local and remote manual start-stop interfaces and automatic start-stop interfaces, the number of the interfaces is easy to expand, the standardized design of the magnetic starter is facilitated, the magnetic starter is provided with the local and remote manual start-stop interfaces and the automatic start-stop interfaces, the number of the interfaces is easy to expand, and the standardized design of the magnetic starter is facilitated. The control power supply adopts lower AC230V control power, and is more beneficial to personal safety during operation compared with AC400V voltage; in the control of the fan motor of the battery compartment of the electric ship, the priority of the stopping function is higher than that of the starting function, so that the safety of fire extinguishing of the ship is facilitated; the magnetic starter has the functions of physical and virtual manual mode and automatic mode switching, and realizes the functions of control redundancy and flexible operation.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic block diagram of a marine multi-interface magnetic starting system of the present invention;

FIG. 2 is a circuit diagram of a marine multi-interface magnetic starter system according to the present invention;

FIG. 3 is a flow chart of the automatic control state of the battery compartment fan of the marine multi-interface magnetic starting system according to the present invention;

FIG. 4 is a battery compartment fan monitoring interface of a marine multi-interface magnetic starting system of the present invention;

wherein: 101. a power source; 102. a circuit breaker; 200. a magnetic starter; 2010. a thermal relay; 2011. a thermal relay auxiliary contact; 202. a transformer; 203. a second local control switch; 204. a second remote control switch; 205. reserving a stopping interface; 206. reserving a starting interface; 207. a first remote control switch; 208. a first local control switch; 2090. a contactor; 2091. a contactor main contact; 2092. a contactor first auxiliary contact; 2093. a contactor second auxiliary contact; 210. a self-locking knob switch; 2110. a mode switching relay; 2111. a mode switching relay first contact; 2112. a mode switching relay second contact; 2113. a mode switching relay third contact; 300. an electric motor; 400. a ship-wide controller; 4010. an automatic start relay; 4011. an automatic start relay contact; 4020. an automatic stop relay; 4021. automatically stopping the relay contact; 500. a power lithium battery management system; 600. a heptafluoropropane control system; 700. a shipborne emergency lead-acid storage battery; 800. a human-computer interaction display system.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.

A marine multi-interface magnetic starting system comprises a magnetic starter 200, wherein a primary side of a transformer on the magnetic starter 200 is powered from a three-phase main circuit, a secondary side of the transformer supplies power to a control loop of the magnetic starter 200, one end of the three-phase main circuit is connected with a power supply 101, the other end of the three-phase main circuit is connected with a motor 300, a manual stop switch, an automatic starting branch circuit and a contactor 2090 are sequentially connected in series on the control loop, the contactor 2090 controls the connection of a main contact 2091 of the contactor, and the communication between the automatic stop switch and the automatic starting branch circuit is controlled by an automatic control system respectively.

Furthermore, a manual starting branch is connected in parallel to the automatic starting branch.

Further, a first remote control switch 207 and a first local control switch 208 are connected in parallel to the manual starting branch, wherein the first remote control switch 207 controls the communication of the control loop of the magnetic starter 200 through remote operation, and the first local control switch 208 controls the communication of the control loop of the magnetic starter 200 through local manual operation.

Further, the automatic control system comprises a ship controller 400, the ship controller 400 is connected with an automatic starting relay 4010 and an automatic stopping relay 4020 which are connected in parallel, the automatic starting relay 4010 controls the connection of an automatic starting relay contact 4011 on an automatic starting branch, and the automatic stopping relay 4020 controls the connection of an automatic stopping relay contact 4021 on an automatic stopping switch.

Further, the ship controller 400 is further connected with a heptafluoropropane control system 600, the heptafluoropropane control system 600 includes a sensor, and the heptafluoropropane control system 600 sends an instruction to the ship controller 400 after receiving a signal sent by the sensor, so that the ship controller 400 controls a contact on a control loop of the magnetic starter.

Further, the power source 101 is an ac distribution board, the motor 300 is a three-phase ac auxiliary motor, the ac distribution board supplies power to the three-phase ac auxiliary motor through a circuit breaker 102 with an overcurrent protection function, the magnetic starter 200 performs start-stop control on the three-phase ac auxiliary motor, a thermal relay 2010 is arranged on the three-phase main circuit, and the thermal relay 2010 controls a thermal relay auxiliary contact 2011.

Further, the contactor 2090 also controls the closing of a first auxiliary contact 2092 of the contactor, and the first auxiliary contact 2092 of the contactor is closed to form a self-locking circuit.

Further, the manual stop switch comprises a second local control switch 203 and a second remote control switch 204 connected in series, wherein the second local control switch 203 controls the communication of the control loop of the magnetic starter through local manual operation, and the second remote control switch 204 controls the communication of the control loop of the magnetic starter through remote operation.

Further, a self-locking knob switch 210 is connected in parallel to the control circuit, the self-locking knob switch 210 controls a mode switching relay 2110, the mode switching relay 2110 controls a mode switching relay first contact 2111 and a mode switching relay second contact 2112, the mode switching relay first contact 2111 is connected in series with an automatic starting relay contact 4011, and the mode switching relay second contact 2112 is connected in series with an automatic stopping relay contact 4021.

A control method of a marine multi-interface magnetic starter comprises the following steps:

s001, initial state, in which the automatic start relay 4010 and the automatic stop relay 4020 are in a release state, and the magnetic starter 200 has no automatic control instruction;

s002, automatically starting the fan, wherein when the whole ship controller 400 receives a fan starting request instruction sent by the heptafluoropropane control system 600, or when the whole ship controller 400 receives the overtemperature of the highest monomer temperature value in the shipborne power lithium battery management system 500 or the overtemperature of the environment temperature value in the power lithium battery management system 500, and the whole ship controller 400 does not receive the fan stopping request instruction sent by the heptafluoropropane control system 600, the whole ship controller 400 controls the automatic stopping relay 4020 to keep a release state, and the controller 400 controls the automatic starting relay 4010 to pull in for 500ms and then release;

s003, in an automatic stop state, when the ship controller 400 detects that the highest monomer temperature value of the power lithium battery management system 500 is recovered due to overtemperature, the environmental temperature value in the power lithium battery management system 500 is recovered due to overtemperature, and the heptafluoropropane control system 600 does not request to start a fan, the ship controller 400 controls the automatic stop relay 4020 to continuously release, at the moment, the automatic stop relay contact 4021 acts for 500ms, the power supply of a control loop of the magnetic starter 200 is cut off, the corresponding contactor 2090 loses power, the corresponding contactor main contact 2091 and the contactor first auxiliary contact 2092 act simultaneously, and the main loop and the control loop both lose power;

and S004, a heptafluoropropane release ending state, wherein after the whole ship controller 400 continues for 1h and does not detect a fan stop instruction of the heptafluoropropane control system 600, the state of the fan is transferred to the initial state of the step S001, and in the period, if the fire extinguishing process is finished.

Example 1:

as shown in fig. 1, the primary side of the transformer 202 directly takes power from two phases of the three-phase main circuit, the secondary side supplies power to the control loop of the magnetic starter 200, one end of the three-phase main circuit is connected with the 400V power supply 101, the other end is connected with the motor 300, the motor is connected with the fan, the control loop of the magnetic starter 200 comprises a stop interface circuit and a start interface circuit, wherein the stop interface circuit adopts a series connection mode, the stop interface circuit is connected in series by a manual stop switch and an automatic stop switch, the automatic stop switch is controlled by an automatic control system, the stop interface sends out stop action to cut off the power supply of the motor 300, the start interface adopts a parallel connection mode, a manual start branch is connected in parallel with an automatic start branch, the motor can be powered by any start interface action on the premise of no stop instruction, and the automatic start branch is controlled by the automatic control system, therefore, the priority of the stop control is higher than that of the start control, and after the control loop of the magnetic starter 200 is switched on, the contactor 2090 controls the contactor main contact 2091 to be switched on, and the automatic start branch in the stop interface is connected with the bypass interface of the manual start branch in parallel, so that the effectiveness of the manual emergency control is ensured.

If the stopping interface of the magnetic starter 200 needs to be added, only the stopping interface needs to be connected in series in the existing stopping interface circuit; if the starting interface of the magnetic starter 200 needs to be added, the starting interface is only connected in parallel with the existing starting interface, and the starting interface and the stopping interface are conveniently and effectively expanded.

Example 2

As shown in fig. 2, the automatic control system of the magnetic starter 200 is executed by the ship controller 400, and in order to ensure standardization of design and manufacture of the magnetic starter 200, an automatic control executing part is installed outside the magnetic starter 200, and an interface for automatic start and automatic stop is provided only inside the magnetic starter 200. The control of the fan motor of the battery compartment of the electric ship relates to the highest monomer temperature of the battery from the battery management system 500, the ambient temperature of the battery compartment and a control command of the fan of the battery compartment from the heptafluoropropane control system 600, the whole ship controller 400 integrates the above information, the fan is comprehensively controlled by the magnetic starter 200, and the starting and stopping control command priority of the fan of the heptafluoropropane control system 600 is highest in the automatic control command of the fan of the battery compartment.

Under normal conditions, in order to ensure the safety of the power battery of the electric ship during navigation, charging of a shipborne charger and charging of a shore-based charging pile, the fan of the battery cabin is in an automatic control mode, particularly when the shore-based charging pile is charged, the working power supply of the whole ship controller 400 and the heptafluoropropane control system 600 still needs to be ensured, and the shipborne 24V lead-acid storage battery pack needs to be used for uninterrupted power supply. In order to ensure the redundancy of manual control of the magnetic starter 200, a manual control and automatic control switching function is additionally arranged on a human-computer interaction display system 800 positioned on a driving console and a cabin, so as to ensure the effectiveness of the manual control after the switch of the magnetic starter fails, a control system of a power battery is a battery management system 500, the power battery is a lithium iron phosphate battery, supplies power for a propulsion system and an auxiliary system of the whole ship, and a shipborne lead-acid storage battery 700 is a storage battery, and supplies power for emergency lighting, conduction and the control system only under the condition that the whole ship is out of power; the power battery can charge the shipborne lead-acid storage battery 700 after overvoltage transformation, and the whole ship controller 400 is respectively connected with a battery management system 500, a heptafluoropropane control system 600, the shipborne lead-acid storage battery 700 and a man-machine interaction display system 800.

The three-phase AC auxiliary motor is supplied with power by a shipborne AC distribution board ASB through a circuit breaker 102 with overcurrent and short-circuit protection functions, the magnetic starter 200 controls the start and stop of the motor 300, a control power supply supplies power through a built-in micro transformer with the transformation ratio of AC400/AC230V, the primary side of the micro transformer is connected with two phases of three-phase AC400V, and the secondary side of the micro transformer is connected with a control system of the magnetic starter 200. When the magnetic starter controls the motor 300, the priority of the stop control is higher than that of the start control. Each normally closed stop interface is connected in series in a control loop of the magnetic starter 200, and includes a thermal relay 2010, a thermal relay control thermal relay auxiliary contact 2011, a second local control switch 203, a second remote control switch 204, an automatic stop relay contact 4021, and a reserved stop interface 205, and when any stop interface sends out a stop action, the magnetic starter 200 cuts off the power supply of the motor 300; each normally open type starting interface is in a parallel type and comprises a first remote control switch 207, a first local control switch 208, an automatic starting relay contact 4011 and a reserved starting interface 206, on the premise that no stop action exists, any starting interface sends out a starting action, a coil of a contactor 2090 is electrified, a main contact 2091 of the contactor, a first auxiliary contact 2092 of the contactor and a second auxiliary contact 2093 of the contactor act, wherein the main contact 2091 of the contactor is connected with a main loop, the first auxiliary contact 2092 of the contactor forms coil power supply self-locking, so that power supply of the motor 300 is continuously connected, and the whole ship controller 400 collects the state of the second auxiliary contact 2093 of the contactor to judge the suction and release working states of the contactor.

In order to realize the functions of testing, emergency operation and the like of the magnetic starter, the conversion between manual and automatic control modes is realized through the self-locking knob switch 210. When the self-locking knob switch 210 is rotated to an automatic position, the coil of the mode conversion relay 2110 is electrified, the first contact 2111 of the mode conversion relay, the second contact 2112 of the mode conversion relay and the third contact 2113 of the mode conversion relay act, the first contact 2111 of the mode conversion relay is connected with the automatic starting branch, the second contact 2112 of the mode conversion relay is disconnected with the bypass circuit of the automatic stopping relay contact 4021, when the switch 210 is rotated to the current manual position in fig. 1, the contacts of the mode conversion relay 2110 are restored to the state in fig. 2, wherein the first contact 2111 of the mode conversion relay is disconnected with the automatic starting branch, and the second contact 2112 of the mode conversion relay is short-circuited with the automatic stopping contact. The boat-handling controller 400 collects the state of the third contact 2113 of the mode switching relay to judge the manual and automatic operation modes of the magnetic starter 200. In order to realize standardization of the interface of the magnetic starter 200, only an interface for automatic starting and stopping is arranged in the magnetic starter, related execution components are arranged in the ship controller 400, and the automatic starting relay 4010 and the automatic stopping relay 4020 are controlled by the ship controller 400. The ship-wide controller 400 and the heptafluoropropane control system 600 are supplied with power continuously by using a ship-mounted 24V lead-acid battery.

The multi-magnetic interface control system can be controlled through a virtual button switch in the interface of the man-machine interaction display system 800, in order to prevent the failure of a magnetic starter operation mode knob and cause the failure of mode conversion of the magnetic starter 200, an operation mode selection virtual switch of the starter is arranged on the man-machine interaction display system 800 of a driving console and a cabin, and when a manual mode is selected, the whole ship controller 400 controls the automatic stop relay 4020 to continuously release and controls the automatic start relay 4010 to continuously release; when the automatic mode is selected, the whole ship controller enters the state of automatic control of the fan and performs automatic control of the fan. In addition, the ship controller 400 can communicate the collected state of the second auxiliary contact 2093 of the contactor, the state of the third contact 2113 of the mode switching relay, the fan start-stop request of the heptafluoropropane control system 600, the highest battery cell temperature and the ambient temperature of the battery compartment sent by the power lithium battery management system 500 to the human-computer interaction display system 800, so as to facilitate monitoring and control of the magnetic starter, the interface design of the human-computer interaction real system related to monitoring and control of the fan of the battery compartment is shown in fig. 4, because the magnetic starter mode on the human-computer interaction display system 800 is switched to the standby function, when the mode of the human-computer interaction display system 800 conflicts with the mode selected by the knob switch, the mode selected on the human-computer interaction display system 800 has higher priority, but the mode selection switch on the starter already realizes the priority of the manual mode on the physical circuit, so whenever, an operator can realize a manual control mode for the magnetic starter 200, and control failure of the magnetic starter 200 is prevented.

Example 3

Whether a battery compartment fan works or not is judged, key processes of battery compartment power lithium battery monomer temperature control, battery compartment environment temperature control, battery compartment combustible gas concentration dilution and heptafluoropropane fire extinguishing gas release and extraction are related, the current battery compartment fan control is taken as an example, a whole ship controller 400 integrates the highest monomer temperature of a battery in a battery management system 500, the battery compartment environment temperature and fan start-stop instruction information of a heptafluoropropane control system 600, automatic start-stop of the fan is comprehensively judged, and the automatic start-stop of the fan is realized through relays 4010 and 4020. The automatic starting condition of the battery compartment fan is that the highest monomer temperature of the battery is over-temperature, or the environmental temperature of the battery compartment is over-temperature or the heptafluoropropane control system 600 requests to start the fan, and at the moment, the concentration of combustible gas in the battery compartment is higher, and the fan is started to ventilate and dilute; the automatic stopping condition is that the highest monomer temperature of the battery is recovered due to overtemperature, or the environmental temperature of the battery compartment is recovered due to overtemperature, or the heptafluoropropane control system 600 requests to stop the fan, at the moment, the concentration of combustible gas in the battery compartment is too high, the fan needs to be stopped, and the heptafluoropropane fire extinguishing gas is released in the battery compartment.

In order to prevent the frequent start and stop of the fan, a certain hysteresis value is set for the over-temperature of the temperature and the threshold value of over-temperature recovery, for example, the over-temperature start is carried out at 55 ℃, and the over-temperature recovery is carried out at 45 ℃. In order to effectively control the automatic start-stop of the fan, an automatic control mode operation state transition diagram as shown in fig. 3 is designed, and the states and the transition conditions among the states are as follows:

s001, which is an initial state, is a state when the control system is initially powered on, at this time, the stop relay 4020 and the automatic start relay 4010 are both in a release state, and the magnetic starter 200 has no automatic control instruction.

And S002, in an automatic starting state, when the whole ship controller 400 detects that the heptafluoropropane control system 600 requests to start the fan, or detects that the highest monomer temperature of the battery is over-temperature or the ambient temperature of the battery is over-temperature, and the heptafluoropropane control system 600 does not request to stop the fan, the whole ship controller 400 controls the stop relay 4020 to keep a release state, controls the automatic start relay 4010 to pull in for 500ms and then release, and at the moment, the circuit connection function of the magnetic starter 200 can be realized through the self-locking relation of the contact 2090 and the first auxiliary contact 2092 of the contact in the magnetic starter 200. The automatic starting control adopts pulse control, so that the automatic starting process has no memory, and the high-frequency false operation of manual start-stop and automatic start-stop can be prevented.

S003, the ship controller 400 is in an automatic stop state, because the temperature of the battery monomer and the ambient temperature of the battery compartment are strongly coupled variables, in order to ensure the effectiveness of the temperature overtemperature recovery of the battery monomer, when the ship controller 400 detects that the highest temperature of the battery monomer is overtemperature recovered and the ambient temperature of the battery is overtemperature recovered and the heptafluoropropane control system 600 does not request to start the fan, the ship controller 400 controls the automatic stop relay 4020 to pull in and release the automatic stop relay 4010 for 500ms and controls the automatic start relay 4010 to continuously release the automatic stop relay 4021 to act for 500ms at the moment, a control loop of the magnetic starter 200 is cut off, the corresponding contactor 2090 loses power, the corresponding main contactor 2091, the first auxiliary contactor 2092 and the second auxiliary contactor 2093 act simultaneously, and the main loop and the control loop both lose power. The automatic stop control adopts pulse control, so that the automatic stop process has no memory, and the high-frequency false actions of manual start-stop and automatic start-stop can be prevented.

And S004, in a heptafluoropropane release state, exhausting air in the cabin out of the cabin by utilizing the high density of the heptafluoropropane gas which is six times that of the air, wherein the process relates to the fire extinguishing safety of the whole ship, the work of a battery cabin fan needs to be stopped immediately and continuously, the circulation of oxygen is reduced, and meanwhile, the heptafluoropropane gas is prevented from being diluted by flowing air to cause fire extinguishing failure and personal and property loss. At the moment, the whole ship controller controls the automatic stop relay 4020 to continuously attract and controls the automatic start relay 4010 to continuously release. When the whole ship controller 400 does not detect the fan stop instruction of the heptafluoropropane control system 600 for 1 hour, the fan is switched from the S004 state to the initial S001 state, and in the period, if the fire extinguishing process is finished, heptafluoropropane gas needs to be discharged, the magnetic starter 200 can be placed in the manual mode through the self-locking type knob switch 210, the manual magnetic starter 200 conducts ventilation work of the battery compartment, and personnel are prevented from directly entering the battery compartment filled with the high-density and high-concentration heptafluoropropane gas to suffocate the personnel.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.

It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.