阅读说明：本技术 柴油发电机拖动循环式索道主电机电气控制电路 (Electric control circuit of main motor of circulating cableway dragged by diesel generator ) 是由 赵莹玮 于 2021-09-08 设计创作，主要内容包括：本发明公开了柴油发电机拖动循环式索道主电机电气控制电路,属于柴油发电机技术与客运索道电机拖动领域,包括三相智能监测缺相、过欠压继电器KC1(简称三相电源继电器)和变频器INV输出电压UV,过欠压继电器KC1的L1端、L2端和L3端分别连接有熔断器FU5、熔断器FU6和熔断器FU7。本发明是利用西门子四象限S150变频器INV与急停电路本身具有的自由停车的功能,在自由停车方式下,S150变频器不会主动电气制动而产生回馈能量,达到对索道柴油发电机与主电控有效的保护,在采取此新型控制技术需要对电控运行状态进行监测,当出现正常工况(含停车、外围设备安全保护及主机故障)产生电气制动时,当有制动功率产生时,实时在线监测。(The invention discloses an electric control circuit of a main motor of a circulating cableway dragged by a diesel generator, which belongs to the fields of diesel generator technology and passenger cableway motor dragging and comprises a three-phase intelligent monitoring open-phase and overvoltage-undervoltage relay KC1 (a three-phase power relay for short) and a frequency converter INV output voltage UV, wherein the L1 end, the L2 end and the L3 end of the overvoltage-undervoltage relay KC1 are respectively connected with a fuse FU5, a fuse FU6 and a fuse FU 7. The invention utilizes the free parking function of the Siemens four-quadrant S150 frequency converter INV and the emergency stop circuit, under the free parking mode, the S150 frequency converter can not generate feedback energy due to active electric braking, thereby achieving the effective protection of the cableway diesel generator and the main electric control.)

1. Diesel generator drags circulating cableway main motor electric control circuit, lack the looks including three-phase intelligent monitoring, cross undervoltage relay KC1 and converter INV, cross undervoltage relay KC 1's L1 end, L2 end and L3 end and be connected with fuse FU5, fuse FU6 and fuse FU7 respectively, and cross undervoltage relay KC 1's L1 end, L2 end and L3 end and all be connected with voltmeter PV, its characterized in that still includes:

the power direction detection circuit (1), the input end of the power direction detection circuit (1) is connected with the output ends of the fuse FU6 and the fuse FU 7;

the emergency stop circuit (3), the emergency stop circuit (3) is connected with the emergency stop control loop of the frequency converter INV;

the input end of the control power supply protection circuit (4) is connected with the output end of the emergency stop circuit (3) and is used for controlling a loop power supply in real time;

the power direction protection circuit (5), the input of power direction protection circuit (5) is connected with the input of power monitoring protection circuit (4), wherein, power direction protection circuit (5) includes circuit breaker QF3, power direction relay JJ and time relay KT2, the input of circuit breaker QF3 is connected with the input of power direction relay JJ (4), circuit breaker QF3, power direction relay JJ and time relay KT2 are connected in series in proper order, the output of time relay KT2 is connected with the L end of fault signal output emergency stop relay KT-JT; and

and the input end of the fault circuit (6) is connected with the output end of the power direction protection circuit (5).

2. The electrical control circuit of the main motor of the cableway system driven by diesel generators according to claim 1, wherein said power direction detecting circuit (1) comprises two current transformers TAa, two current meters PA, two fuses QF1, two fuses FU1, two fuses FU2, two fuses FU3 and two fuses FU4, wherein the two circuit breakers QF1 are connected to the input of the two circuit breakers QF1 and the output of the fuse FU6 and the output of the fuse FU7, the current transformers TAa are mutually inductive with the fuses FU7, and the current meters PA are disposed on the current transformers TAa.

3. The main motor-motor electrical control circuit of the diesel generator dragging circulating type cableway, according to claim 2, characterized in that the control power supply circuit (2) comprises a breaker QF5, a contactor contact KM1 and a three-phase power supply relay KC2, wherein the end L2 of the over-under voltage relay KC1 is connected with the input end of the breaker QF5 and the input end of the three-phase power supply relay KC2, the output end of the breaker QF5 and the output end of the three-phase power supply relay KC2 are both connected with the input end of the contactor contact KM1, and the output end of the contactor contact KM1 is connected with the end L3 of the over-under voltage relay KC 1.

4. The electrical control circuit of the main motor of the diesel generator dragging circulating cableway as claimed in claim 3, wherein the emergency stop circuit (3) comprises a circuit breaker QF2, a differential relay KD4, a switch SB 1-1, a switch SB 2-1, a switch SA1, a time relay KT1, an indicator lamp HL1, an indicator lamp HL5, an indicator lamp HL2, an indicator lamp HL6 and a time relay KT3, the L + end of the control loop dc power PW1 is connected to the input end of the differential relay KD4 and the input end of the circuit breaker QF2, the output end of the circuit breaker QF2 is connected to the input end of the switch SB 1-1, the input end of the indicator lamp HL1 and the input end of the indicator lamp HL5, the output end of the switch SB 1-1 is connected to the input end of the switch SB2, the output end of the switch SB2 SA 461 is connected to the input end of the switch SB1, and the output end of the switch 1 is connected to the time relay 1, The input of pilot lamp HL2 and the input of pilot lamp HL6 are connected, time relay KT 1's output is connected with relay KT 3's input, circuit breaker QF 2's output, pilot lamp HL 1's output, pilot lamp HL 5's output, time relay KT 3's output, pilot lamp HL 2's output and pilot lamp HL 6's output all are connected with control circuit DC power supply PW 1's L-end.

5. The diesel generator dragging circulating type cableway main motor electric control circuit according to claim 4, characterized in that, power supply detection protection circuit (4) includes pilot lamp HL3 and pilot lamp HL7, the output of switch SB 1-1 is connected with relay KT 3's input and under-voltage relay KC 1's input respectively, time relay KT 3's output is connected with circuit breaker QF 3's input, under-voltage relay KC 1's output is connected with time relay KT 1's input, pilot lamp HL 3's input and pilot lamp HL 7's input respectively, time relay KT 1's output, pilot lamp HL 3's output and pilot lamp HL 7's output all are connected with the L-end of control circuit DC power supply PW 1.

6. The diesel-electric generator electric control circuit of claim 5 for dragging a circulating cableway, it is characterized in that the fault circuit (6) comprises a differential relay KD1, a differential relay KD2, a switch JT, an indicator light HLA, an indicator light HL8 and a fault relay JT, the output end of the switch SB 2-1 is also respectively connected with the input end of the differential relay KD1, the input end of the over-voltage and under-voltage relay KC1, the input end of the time relay KT2, the input end of the switch JT and the input end of the differential relay KD2, the output end of the differential relay KD1, the output end of the over-voltage and under-voltage relay KC1, the output end of the time relay KT2, the output end of the switch JT and the output end of the differential relay KD2 are connected with the input end of the indicator lamp HL4, the input end of the indicator lamp HL8 and the input end of the relay JT, and the output end of the indicator lamp HL4, the output end of the indicator lamp HL8 and the output end of the fault relay JT are connected with the L-end of the undervoltage relay KC 1.

7. The electrical control circuit for the main motor of the diesel generator dragger cycle ropeway as claimed in claim 6, further comprising:

the input end of the frequency converter output voltage detection circuit (7) is connected with the input end of the relay KD 4; and

the input end of the stall protection circuit (8) is connected with the output end of the frequency converter output voltage detection circuit (7).

8. The main motor-electric control circuit for the diesel generator dragging circulating cableway, according to claim 7, characterized in that said frequency converter output voltage detection circuit (7) comprises a hall sensor HTIB and an intelligent voltage controller WPx, the L + and L-terminals of said dc control power PW1 are connected to the power supply terminal, the 5 and 6 pins of said chip HTIB are connected to the power supply terminal, and the 1 and 4 pins of said chip HTIB are connected to the output terminal of the differential relay KD 4.

9. The diesel-electric generator electric control circuit of claim 8 for driving a circulating cableway, characterized in that the stall protection circuit (8) comprises a DC 4-20mA transmitting signal one-to-two WP9044 transmitter and an intelligent voltage controller WPy, the output transmitting end of the Hall sensor HTIB is connected with the transmitting signal input end of the transmitting signal one-to-two WP9044 transmitter, the transmitting signal monitoring input end of the intelligent voltage controller WPx is connected with a transmitting one-to-two sensor transmitting output 1 channel, a transmitting output 2 channel of the transmitting signal WP9044 is connected with a transmitting signal monitoring input end, the 14 pin and the 13 pin of the transmitting signal one-to-two WP9044 are respectively connected with the L + end and the L-end of the direct-current control power supply, and a pin 10 and a pin 9 of the intelligent voltage controller WPy are respectively connected with an L + end and an L-end of a direct-current control power supply PW 1.

Technical Field

The invention relates to the technical field of diesel generators, in particular to an electric control circuit of a main motor of a dragging circulating type cableway of a diesel generator.

Background

The cableway is required to be a dragging control main part of a four-quadrant frequency converter or a four-quadrant direct current speed regulator by new specification requirements, a four-quadrant driving product is an electric industry energy-saving product, the functional characteristic of the cableway is that under the condition of normal driving, the cableway has the function of returning energy fed back during electric braking to an electric network, the cableway not only can use electricity, but also can reversely transmit the electricity to the electric network, when the cableway breaks down or the electric parking process occurs, the electric braking generates huge energy to be fed back to the electric network, the frequency converter or the direct current speed regulator realizes the tasks of energy-saving dragging and energy feedback transmission, a diesel generator replaces commercial power for dragging, a diesel generator with rated power of 3-5 times of power of a main motor is adopted for dragging, the speed and the load of the motor must be strictly controlled, the feedback power of the motor is limited, and the current working condition is that the feedback energy is changed into the diesel generator body to bear, the method is a very dangerous method, firstly, the impact of the diesel engine generator on receiving feedback energy is large, the energy is uncontrollable along with the change of load, a great safety risk exists on the diesel engine generator, an electric control element and a frequency converter (a direct current speed regulator), and the loss amount can reach millions due to the fact that the power of cableway equipment is large and the cableway electric control, the diesel engine generator and the frequency converter are burnt under severe conditions.

If the old ropeway which is normally built by standards is selected by a two-quadrant frequency converter, the frequency converter can not feed back energy to a power grid, when the ropeway breaks down or stops electrically, the frequency converter reverses and gathers energy on a direct current bus to cause the voltage of the direct current bus to rise, a frequency converter braking unit (a braking chopper) is externally connected with a metal resistor, an energy consumption braking mode is adopted, the energy is consumed through the resistor, when the ropeway is in the overhead and heavy working condition, the frequency converter can brake through the braking unit in order to keep the speed stable, the braking energy is consumed through heating of the resistor, if the ropeway is dragged by a diesel generator, when the frequency converter is in the overhead and heavy working condition, the ropeway is in the braking process and stops electrically suddenly, at the moment, the frequency converter generates electric braking, and triggers huge braking energy to the direct current bus, the energy is normally consumed through the metal resistor on the frequency converter braking unit, the resistor is burnt out when reaching the limit, so that the energy of the frequency converter cannot be consumed and the frequency converter is burnt out, the scheme is a non-energy-saving frequency conversion dragging mode, the two-quadrant frequency converter is not allowed to be used by new specifications, and a diesel generator is rarely used for dragging the two-quadrant frequency converter in practical application.

Meanwhile, the conventional electric control circuit of the main motor of the ropeway cannot well protect the power direction.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide an electric control circuit of a main motor of a dragging circulating type cableway of a diesel generator, which utilizes the self free parking function of the emergency stop working function of a frequency converter INV, in the free parking mode, the inverter INV does not actively brake to generate feedback energy, thereby achieving the effective protection of the cableway diesel generator and the main electric control, when the novel control technology is adopted, the electric control operation state needs to be monitored in real time, when the electric brake is carried out when a fault occurs and the artificial parking is carried out, and when the brake power is generated, the protection circuit effectively controls the electric brake after rapidly and accurately judging the electric brake, adopts a free parking mode, the cableway is safely stopped, the requirement of safe dragging of the diesel generator is met, and meanwhile, the invention is convenient for realizing good monitoring and protection control on the power direction.

2. Technical scheme

In order to solve the problems, the invention adopts the following technical scheme:

diesel generator drags circulating cableway main motor electric control circuit, lack the looks including three-phase intelligent monitoring, cross undervoltage relay KC1 and converter INV, cross undervoltage relay KC 1's L1 end, L2 end and L3 end and be connected with fuse FU5, fuse FU6 and fuse FU7 respectively, and cross undervoltage relay KC 1's L1 end, L2 end and L3 end and all be connected with voltmeter PV, its characterized in that still includes:

the input end of the power direction detection circuit is connected with the output ends of the fuse FU6 and the fuse FU 7;

the emergency stop circuit is connected with a control emergency stop loop of the frequency converter INV;

the input end of the control power supply protection circuit is connected with the output end of the emergency stop circuit and is used for controlling the loop power supply in real time;

the power direction protection circuit comprises a circuit breaker QF3, a power direction relay JJ and a time relay KT2, wherein the input end of the circuit breaker QF3 is connected with the input end of the power direction relay JJ, the circuit breaker QF3, the power direction relay JJ and the time relay KT2 are sequentially connected in series, and the output end of the time relay KT2 is connected with the L-end of a fault signal output emergency stop relay JT; and

and the input end of the fault circuit is connected with the output end of the power direction protection circuit. The invention utilizes the free parking function of the frequency converter INV and the emergency circuit, after the frequency converter is in emergency stop, the frequency converter INV can not actively brake to generate feedback energy under the free parking mode, thereby achieving the effective protection of the cableway diesel generator and the main electric control.

As a preferable scheme of the present invention, the power direction detection circuit includes a current transformer TAa, an ammeter PA, a circuit breaker QF1, a fuse FU1, a fuse FU2, a fuse FU3, and a fuse FU4, two of the circuit breakers QF1 are provided, input terminals of the two circuit breakers QF1 are respectively connected with an output terminal of the fuse FU6 and an output terminal of the fuse FU7, the current transformer TAa and the fuse FU7 are mutually inducted, and the ammeter PA is provided on the current transformer TAa.

As a preferable scheme of the invention, the control power circuit comprises a breaker QF5, a contactor contact KM1 and a three-phase power relay KC2, wherein an L2 end of the overvoltage and undervoltage relay KC1 is respectively connected with an input end of the breaker QF5 and an input end of the three-phase power relay KC2, an output end of the breaker QF5 and an output end of the three-phase power relay KC2 are both connected with an input end of the contactor contact KM1, and an output end of the contactor contact KM1 is connected with an L3 end of the overvoltage relay KC 1.

As a preferred scheme of the present invention, the emergency stop circuit includes a circuit breaker QF2, a differential relay KD4, a switch SB 1-1, a switch SB 2-1, a switch SA1, a time relay KT1, an indicator lamp HL1, an indicator lamp HL5, an indicator lamp HL2, an indicator lamp HL6 and a time relay KT3, an L + end of the control circuit dc power supply PW1 is connected to an input end of the differential relay KD4 and an input end of the circuit breaker QF2, an output end of the circuit breaker QF2 is connected to an input end of the switch SB 1-1, an input end of the indicator lamp HL1 and an input end of the indicator lamp HL1, an output end of the switch SB 1-1 is connected to an input end of the switch SB1, an output end of the switch SB 1-KT-1 is connected to an input end of the time relay KT1, an output end of the switch SB1 is connected to an input end of the time relay KT1, an input end of the relay KT1 and the relay KT1 are connected to the input end of the switch SB1, the output end of the circuit breaker QF2, the output end of the indicator lamp HL1, the output end of the indicator lamp HL5, the output end of the time relay KT3, the output end of the indicator lamp HL2 and the output end of the indicator lamp HL6 are connected with the L-end of a control loop direct-current power supply PW 1.

As a preferred scheme of the invention, the power supply detection protection circuit comprises an indicator lamp HL3 and an indicator lamp HL7, an output end of the switch SB 1-1 is connected with an input end of a relay KT3 and an input end of an over-under voltage relay KC1 respectively, an output end of the time relay KT3 is connected with an input end of a circuit breaker QF3, an output end of the over-under voltage relay KC1 is connected with an input end of the time relay KT1, an input end of the indicator lamp HL3 and an input end of the indicator lamp HL7 respectively, and an output end of the time relay KT1, an output end of the indicator lamp HL3 and an output end of the indicator lamp HL7 are connected with an L-end of a control loop direct current power supply PW 1.

As a preferable aspect of the present invention, the fault circuit includes a differential relay KD1, a differential relay KD2, a switch JT, an indicator lamp HLA, an indicator lamp HL8, and a fault relay JT, the output end of the switch SB 2-1 is also respectively connected with the input end of the differential relay KD1, the input end of the over-voltage and under-voltage relay KC1, the input end of the time relay KT2, the input end of the switch JT and the input end of the differential relay KD2, the output end of the differential relay KD1, the output end of the over-voltage and under-voltage relay KC1, the output end of the time relay KT2, the output end of the switch JT and the output end of the differential relay KD2 are connected with the input end of the indicator lamp HL4, the input end of the indicator lamp HL8 and the input end of the relay JT, and the output end of the indicator lamp HL4, the output end of the indicator lamp HL8 and the output end of the fault relay JT are connected with the L-end of the undervoltage relay KC 1.

As a preferable aspect of the present invention, the present invention further includes:

the input end of the frequency converter output voltage detection circuit is connected with the input end of the relay KD 4; and

and the input end of the stall protection circuit is connected with the output end of the frequency converter output voltage detection circuit.

As a preferable scheme of the present invention, the frequency converter output voltage detection circuit includes a hall sensor HTIB and an intelligent voltage controller WPx, an L + end and an L-end of the dc control power PW1 are connected to a power supply end, a 5 pin and a 6 pin of the chip HTIB are connected to the power supply end, and a1 pin and a 4 pin of the chip HTIB are both connected to an output end of the differential relay KD4, so as to perform breakpoint isolation on an input signal, thereby reducing the possibility that no voltage signal is applied to the input end of the hall sensor when the electronic control is not in use, and protecting the input end of the hall sensor.

As a preferred scheme of the present invention, the stall protection circuit includes a one-to-two WP9044 transmitter of the dc 4-20mA transmission signal and an intelligent voltage controller WPy, an output transmission end of the hall sensor HTIB is connected to a transmission signal input end of the one-to-two WP9044 transmitter, a transmission signal monitoring input end of the intelligent voltage controller WPx is connected to a transmission output 1 channel of the one-to-two transmission sensor, a transmission output 2 channel of the one-to-two WP9044 is connected to the transmission signal monitoring input end, pins 14 and 13 of the one-to-two WP9044 are connected to an L + end and an L-end of the dc control power supply, and pins 10 and 9 of the intelligent voltage controller WPy are connected to an L + end and an L-end of the dc control power supply PW1, respectively.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the power direction protection circuit is arranged, so that the power direction can be monitored and protected and controlled well.

(2) The invention utilizes the free parking function of the frequency converter INV and the emergency circuit, under the free parking mode, the inverter INV and the emergency circuit will not actively brake to generate feedback energy, so as to effectively protect the cableway diesel generator and the main power control, when the novel control technology is adopted, the real-time online monitoring of the electric control running state is required, the intelligent voltage controllers WPx and WPy carry out double-channel monitoring, the reliability of redundancy comparison protection is carried out, can realize the comparative protection of controlling the power loss, the failure of a Hall sensor, the failure of a transmitting signal one-to-two WP9044 transmitter and the damage of any one controller of WPx and WPy, when the electric braking of the cableway occurs and the braking power is generated, after the accurate judgment, the effective control is carried out, and the frequency converter is in a free parking mode, so that the cableway is safely stopped, and the safe dragging of the diesel generator is met.

(3) The invention realizes the control of the power supply by controlling the power supply circuit.

(4) The invention detects and protects the power supply through the power supply detection protection circuit.

(5) The invention realizes fault detection through a fault circuit.

(6) The invention realizes stall protection through a stall protection circuit by the power supply detection and protection of a frequency converter output voltage detection circuit and an over-voltage and under-voltage relay KC 1.

Drawings

FIG. 1 is a schematic circuit diagram of the electrical control circuit of the main motor of the circulating cableway driven by the diesel generator according to the present invention;

FIG. 2 is a schematic diagram of a power direction detection circuit in an electrical control circuit of a main motor of the circulating cableway dragged by a diesel generator according to the present invention;

FIG. 3 is a schematic diagram of the control power circuit of the electrical control circuit of the main motor of the circulating cableway driven by the diesel generator according to the present invention;

FIG. 4 is a schematic diagram of the circuit of the emergency stop circuit in the electrical control circuit of the main motor of the circulating cableway dragged by the diesel generator according to the present invention;

FIG. 5 is a schematic diagram of the circuit of the power detection protection circuit in the electrical control circuit of the main motor of the circulating cableway dragged by the diesel generator according to the present invention;

FIG. 6 is a schematic circuit diagram of a power direction protection circuit in an electrical control circuit of a main motor of a diesel generator dragging a circulating cableway according to the present invention;

FIG. 7 is a schematic circuit diagram of a fault circuit in the electrical control circuit of the main motor of the circulating cableway driven by the diesel generator according to the present invention;

FIG. 8 is a schematic circuit diagram of the electrical control circuit of the main motor of the circulating cableway of the diesel generator according to the present invention, wherein the electrical control circuit is the inverter INV;

FIG. 9 is a schematic diagram of the circuit of the frequency converter output power detection circuit and the stall protection circuit in the electrical control circuit of the main motor of the circulating ropeway dragged by the diesel generator according to the present invention;

FIG. 10 is a schematic diagram of a part of the electrical control circuit of the main motor of the circulating cableway driven by the diesel generator according to the present invention.

The reference numbers in the figures illustrate:

1. a power direction detection circuit; 2. a control power supply circuit; 3. an emergency stop circuit; 4. a power supply detection protection circuit; 5. a power direction protection circuit; 6. a fault circuit; 7. a frequency converter output voltage detection circuit; 8. a stall protection circuit.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-10, an electrical control circuit for a main motor of a circulating cableway driven by a diesel generator comprises:

the three-phase intelligent monitoring phase failure, over-voltage and under-voltage relay KC1 and the frequency converter INV, wherein the L1 end, the L2 end and the L3 end of the over-voltage and under-voltage relay KC1 are respectively connected with a fuse FU5, a fuse FU6 and a fuse FU7, and the L1 end, the L2 end and the L3 end of the over-voltage and under-voltage relay KC1 are respectively connected with a voltmeter PV;

power direction detection circuit 1, power direction detection circuit 1's input is connected with fuse FU6 and fuse FU 7's output, and is specific: the power direction detection circuit 1 comprises a current transformer TAa, an ammeter PA, two circuit breakers QF1, a fuse FU1, a fuse FU2, a fuse FU3 and a fuse FU4, wherein two circuit breakers QF1 are arranged, the input ends of the two circuit breakers QF1 are respectively connected with the output end of the fuse FU6 and the output end of the fuse FU7, the current transformer TAa is mutually inductive with the fuse FU7, and the ammeter PA is arranged on the current transformer TAa, belongs to the common general knowledge of technicians in the field, and is not described again;

control power supply circuit 2, control power supply circuit 2's input and cross undervoltage relay KC 1's L1 end connection, it is specific: the control power circuit 2 comprises a breaker QF5, a contactor contact KM1 and a three-phase power relay KC2, wherein the L2 end of the overvoltage and undervoltage relay KC1 is respectively connected with the input end of the breaker QF5 and the input end of the three-phase power relay KC2, the output end of the breaker QF5 and the output end of the three-phase power relay KC2 are both connected with the input end of a contactor contact KM1, the output end of the contactor contact KM1 is connected with the L3 end of the overvoltage and undervoltage relay KC1, and the power supply is controlled through the control power circuit 2;

scram circuit 3, scram circuit 3 is connected with direct current control power PW1, and is specific: the emergency stop circuit 3 comprises a breaker QF2, a differential relay KD4, a switch SB 1-1, a switch SB 2-1, a switch SA1, a relay KT1, an indicator lamp HL1, an indicator lamp HL5, an indicator lamp HL2, an indicator lamp HL6 and an electrified time delay relay 3, wherein an L + end of a direct current control power supply PW1 is respectively connected with an input end of the differential relay KD4 and an input end of the breaker QF2, an output end of the breaker QF2 is respectively connected with an input end of the switch SB 1-1, an input end of the indicator lamp HL1 and an input end of the indicator lamp HL1, an output end of the switch SB 1-1 is connected with an input end of the switch SB 1-72, an output end of the switch SB 1-72 is connected with an input end of the KT1, an output end of the switch SA1 is respectively connected with an input end of the power-off time delay relay KT1, an input end of the KT1 is connected with an input end of the relay KT time delay relay KT1, the output end of the breaker QF2, the output end of the indicator lamp HL1, the output end of the indicator lamp HL5, the output end of the relay KT3, the output end of the indicator lamp HL2 and the output end of the indicator lamp HL6 are all connected with the L-end of the direct-current control power supply, and the power supply is detected and protected through the power supply detection protection circuit 4;

power detects protection circuit 4, and power detects protection circuit 4's input and scram circuit 3's output and is connected, and is specific: the power supply detection protection circuit 4 comprises an indicator lamp HL3 and an indicator lamp HL7, the output end of a switch SB 1-1 is respectively connected with the input end of an electrified time delay relay KT3 and the input end of an over-under voltage relay KC1, the output end of a time relay KT3 is connected with the input end of a circuit breaker QF3, the output end of an over-under voltage relay KC1 is respectively connected with the input end of an outage time delay relay KT1, the input end of an indicator lamp HL3 and the input end of an indicator lamp HL7, and the output end of a time relay KT1, the output end of an indicator lamp HL3 and the output end of an indicator lamp HL7 are all connected with the L-end of a direct current control power supply PW 1;

the power direction protection circuit 5 is characterized in that the input end of the power direction protection circuit 5 is connected with the input end of the power detection protection circuit 4, wherein the power direction protection circuit 5 comprises a circuit breaker QF3, a power direction monitoring power direction relay JJ and a time relay KT2, the input end of the circuit breaker QF3 is connected with the input end of the power detection protection circuit 4, the circuit breaker QF3, the power direction relay JJ and the time relay KT2 are sequentially connected in series, and the output end of the time relay KT2 is connected with the L-end of a direct current control power PW 1;

fault circuit 6, fault circuit 6's input is connected with power direction protection circuit 5's output, and is specific: the fault circuit 6 comprises a differential relay KD1, a differential relay KD2, a switch JT, an indicator lamp HL4, an indicator lamp HL8 and a control relay JT, wherein the output end of the switch SB 2-1 is respectively connected with the input end of the differential relay KD1, the input end of an over-voltage and under-voltage relay KC1, the input end of a time relay KT2, the input end of the switch JT and the input end of the differential relay KD2, the output end of the differential relay KD1, the output end of the over-voltage and under-voltage relay KC1, the output end of the time relay KT2, the output end of the switch JT and the output end of the differential relay KD2 are respectively connected with the input end of the indicator lamp HL4, the input end of the indicator lamp HL8 and the input end of the control relay JT, the output end of the indicator lamp HL4, the output end of the indicator lamp HL8 and the output end of the control relay JT are respectively connected with the L-terminal of the over-voltage and under-voltage relay KC1, and fault detection is realized through the fault circuit 6;

converter output voltage detection circuitry 7, converter output voltage detection circuitry 7's input is connected with KD 4's input, and is specific: the frequency converter output voltage detection circuit 7 comprises a Hall sensor HTIB and an intelligent voltage controller WPx, the L + end and the L-end of a direct-current control power supply PW1 are connected with a power supply end, the 5 pin and the 6 pin of the chip HTIB are connected with the power supply end, the 1 pin and the 4 pin of the chip HTIB are both connected with the output end of a differential relay KD4, and stall protection is realized through the frequency converter output voltage circuit 7 and the power supply detection and protection of a contactor KM1 and the stall protection circuit 8;

stall protection circuit 8, stall protection circuit 8's input and converter output power supply detection circuitry 7's output are connected, and are specific: the stall protection circuit 8 comprises a direct current 4-20mA transmission signal one-to-two WP9044 transmitter and an intelligent voltage controller WPy, the output transmission end of a Hall sensor HTIB is connected with the transmission signal input end of the transmission signal one-to-two WP9044 transmitter, the transmission signal monitoring input end of the intelligent voltage controller WPx is connected with the transmission output 1 channel of the transmission one-to-two sensor, the transmission output 2 channel of the transmission signal one-to-two WP9044 is connected with the transmission signal monitoring input end, pins 14 and 13 of the transmission signal one-to-two WP9044 are respectively connected with the L + end and the L-end of a direct current control power supply, and pins 10 and 9 of the intelligent voltage controller WPy are respectively connected with the L + end and the L-end of the direct current control power supply PW 1;

the working principle or working process of the invention is as follows: the invention utilizes the free parking function of the frequency converter INV and the emergency circuit 3, and under the free parking mode, the frequency converter INV and the emergency circuit 3 can not actively brake so as to avoid generating feedback energy, thereby achieving the effective protection of the cableway diesel generator and the main power control, when the novel control technology is adopted, the running state of the main machine of the cableway needs to be accurately monitored, and when electric braking occurs and braking power is generated, the cableway is effectively controlled after accurate judgment, a free parking mode is adopted, so that the cableway is safely stopped, the protection of safe dragging of a diesel generator, a frequency converter and main and auxiliary electric control is met, technical breakthrough is realized, the conventional method that the brake power of the conventional cableway is consumed by an energy-consumption brake mode through a resistance heating mode in China at present is changed, the heat energy of a heating resistor is consumed in the air, and certain contribution is made in the aspects of energy conservation and environmental protection.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.