阅读说明：本技术 一种交直流两用电机控制系统 (AC/DC motor control system ) 是由 张为堂 郭渊 夏小虎 秦强 王庆龙 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种交直流两用电机控制系统,包括直流电源、逆变器、整流器、低通滤波器、第一继电器和电力设备,所述直流电源与逆变器电性相连,所述逆变器与整流器电性相连,所述整流器与低通滤波器电性相连,所述低通滤波器通过第一继电器与电力设备电性相连,所述将直流电源中的直流电输出至逆变器中,通过逆变器逆变成交流电,并输出至整流器中,通过整流器把交流电转换成直流电,相比开始电源输出的直流电电压要高,并继续将电流输送至低通滤波器中,保证交直流两用电机使用范围广泛,同时适用高低压不同的用电器,保证电路工作的持续稳定,不用费力多次开启或关闭电源,实用性强。(The invention discloses an AC/DC motor control system, which comprises a DC power supply, an inverter, a rectifier, a low-pass filter, a first relay and power equipment, wherein the DC power supply is electrically connected with the inverter, the inverter is electrically connected with the rectifier, the rectifier is electrically connected with the low-pass filter, the low-pass filter is electrically connected with the power equipment through the first relay, the DC in the DC power supply is output to the inverter, is inverted into AC through the inverter and is output to the rectifier, the AC is converted into DC through the rectifier, the DC voltage is higher than that of the DC output by the power supply, and the current is continuously transmitted to the low-pass filter, so that the AC/DC motor has a wide application range, is suitable for electrical appliances with different high and low voltages, ensures the continuous and stable operation of a circuit, and does not need to open or close the power supply for many times, the practicability is strong.)

1. The utility model provides an alternating current-direct current dual-purpose motor control system, includes DC power supply, dc-to-ac converter, rectifier, low pass filter, first relay and power equipment, its characterized in that: the direct current power supply is electrically connected with the inverter, the inverter is electrically connected with the rectifier, the rectifier is electrically connected with the low-pass filter, the low-pass filter is electrically connected with the power equipment through the first relay, direct current in the direct current power supply is output to the inverter, the inverter inverts the direct current into alternating current and outputs the alternating current to the rectifier, the alternating current is converted into direct current through the rectifier, the direct current voltage is higher than direct current voltage output by the power supply, current is continuously transmitted to the low-pass filter, frequency points with specific frequency in a power line or frequencies except the frequency points are effectively filtered through the low-pass filter, the current continuously enters the first relay, and the current is output to the power equipment through the first relay to control the power equipment to start.

2. The ac-dc motor control system of claim 1, wherein: the alternating current power supply is electrically connected with the bridge rectifier circuit, the bridge rectifier circuit is electrically connected with the smoothing reactor, the smoothing reactor is electrically connected with the three-phase bridge inverter circuit, the three-phase bridge inverter circuit is electrically connected with the filter, the filter is electrically connected with the second relay, the second relay is electrically connected with the power equipment, the alternating current power supply outputs alternating current to the bridge rectifier circuit, the input current is rectified by the bridge rectifier circuit and then becomes direct current and is output to the smoothing reactor, the input current is subjected to voltage stabilization through the smoothing reactor and then is conveyed to the three-phase bridge inverter circuit, the inverted current is transmitted to the filter through the three-phase bridge inverter circuit, and the frequency point or frequency point of specific frequency in a power line is subjected to frequency point or frequency point of specific frequency in the power line through the filter The frequencies except the frequency point are effectively filtered, a power signal with a specific frequency is obtained and transmitted to the second relay, the power signal is transmitted to the power equipment through the second relay to control the power equipment to be started, the first relay and the second relay are electrically connected with the controller, and the controller controls the first relay or the second relay to be started.

3. The ac-dc motor control system of claim 1, wherein: the temperature sensor is arranged on the outer wall of the power equipment and is electrically connected with the controller, the controller is electrically connected with the pulse width modulation circuit, the pulse width modulation circuit is electrically connected with the three-phase bridge type inverter circuit, the pulse width modulation circuit is electrically connected with the inverter, the temperature sensor transmits a detection signal to the controller after detecting the overhigh temperature of the power equipment, the controller judges and starts the pulse width modulation circuit, the processed current signal and the like are transmitted to the pulse width modulation circuit, the pulse width modulation circuit transmits the inversion control signal back to the three-phase bridge type inverter circuit and the inverter, the inverted current is transmitted to the filter and the rectifier through the three-phase bridge type inverter circuit and the inverter respectively, and the filter and the low-pass filter effectively filter the frequency point of the specific frequency in the power line or the frequency beyond the frequency point, and obtaining a power supply signal with a specific frequency and transmitting the power supply signal to the power equipment through the first relay and the second relay.

4. The ac-dc motor control system of claim 3, wherein: the temperature sensor is electrically connected with a display, and the display is used for displaying the numerical value detected by the temperature sensor.

5. The ac-dc motor control system of claim 1, wherein: the electrical devices may be high or low voltage electrical devices.

Technical Field

The invention relates to the technical field of motor control systems, in particular to an alternating current and direct current dual-purpose motor control system.

Background

A control loop in a high-voltage power supply and distribution system generally comprises a plurality of different electric systems of DC220V, DC110V, AC220V and AC110V, in order to be compatible with the different electric systems of AC and DC, an AC-DC dual-purpose motor is widely adopted as an execution component in an action execution mechanism and used for pushing a high-voltage switch to act to realize the opening and closing of a high-voltage switch, the AC-DC dual-purpose motor is a series excitation DC motor which is characterized in that an excitation (stator) winding and an armature (rotor) winding of the DC motor are connected in series, so that the rotation direction of the motor is only related to the sequence of the same-name ends connected with the two windings and is unrelated to the positive and negative of a power supply voltage, therefore, the motor can be operated by the common electricity of an AC power supply and can also be operated by the power supply of the DC power supply, meanwhile, the motor also has the advantage of being suitable for heavy-load starting, the device is not suitable for high-voltage power equipment and has poor practicability.

Disclosure of Invention

The invention aims to provide an alternating current and direct current motor control system to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an AC/DC motor control system comprises a DC power supply, an inverter, a rectifier, a low-pass filter, a first relay and power equipment, the direct current power supply is electrically connected with the inverter, the inverter is electrically connected with the rectifier, the rectifier is electrically connected with the low-pass filter, the low-pass filter is electrically connected with the power equipment through a first relay, the power supply outputs direct current in the direct current power supply to the inverter, inverting the AC power to AC power by an inverter and outputting the AC power to a rectifier, converting the AC power to DC power by the rectifier, the DC power having a voltage higher than that of the DC power outputted from the power supply, and continuously supplying the DC power to a low-pass filter, the low-pass filter is used for effectively filtering the frequency point of the specific frequency in the power line or the frequency except the frequency point, the current continues to enter the first relay, and the current is output to the power equipment through the first relay to control the power equipment to start.

Preferably, the power supply further comprises an alternating current power supply, a bridge rectifier circuit, a smoothing reactor, a three-phase bridge inverter circuit, a filter, power equipment, a current-voltage transformer and a processor, wherein the alternating current power supply is electrically connected with the bridge rectifier circuit, the bridge rectifier circuit is electrically connected with the smoothing reactor, the smoothing reactor is electrically connected with the three-phase bridge inverter circuit, the three-phase bridge inverter circuit is electrically connected with the filter, the filter is electrically connected with a second relay, the second relay is electrically connected with the power equipment, the alternating current power supply outputs alternating current to the bridge rectifier circuit, rectifies the input current into direct current through the bridge rectifier circuit and outputs the direct current to the smoothing reactor, stabilizes the voltage of the input current through the smoothing reactor and then transmits the regulated current to the three-phase bridge inverter circuit, the inverted current is transmitted to the filter through the three-phase bridge inverter circuit, and the filter is used for regulating the specific frequency in the The frequency point or the frequencies except the frequency point are effectively filtered, a power signal with a specific frequency is obtained and transmitted to the second relay, the power signal is transmitted to the power equipment through the second relay to control the power equipment to start, the first relay and the second relay are electrically connected with the controller, and the controller controls the first relay or the second relay to be started.

Preferably, the outer wall of the power equipment is provided with a temperature sensor, the temperature sensor is electrically connected with a controller, the controller is electrically connected with a pulse width modulation circuit, the pulse width modulation circuit is electrically connected with a three-phase bridge inverter circuit, the pulse width modulation circuit is electrically connected with an inverter, the temperature sensor detects the overhigh temperature of the power equipment, transmits a detection signal to the controller, judges and starts the pulse width modulation circuit through the controller, transmits processed current signals and the like to the pulse width modulation circuit, transmits inversion control signals back to the three-phase bridge inverter circuit and the inverter, transmits the inverted current to a filter and a rectifier through the three-phase bridge inverter circuit and the inverter respectively, and effectively filters the frequency point of specific frequency in a power line or the frequency beyond the frequency point through the filter and a low-pass filter, and obtaining a power supply signal with a specific frequency and transmitting the power supply signal to the power equipment through the first relay and the second relay.

Preferably, the temperature sensor is electrically connected with a display, and the display is used for displaying the value detected by the temperature sensor.

Preferably, the electric device may be a high-voltage or low-voltage electric device.

Compared with the prior art, the invention has the beneficial effects that: the utility model provides an alternating current-direct current dual-purpose motor control system, guarantees that alternating current-direct current dual-purpose motor application range is extensive, is suitable for the different electrical apparatus that use of high-low pressure simultaneously, guarantees the continuation of circuit work stable, need not hard to open or close the power many times, and the practicality is strong.

Drawings

FIG. 1 is a block diagram of the system architecture of the present invention;

FIG. 2 is a block diagram of an AC power system according to the present invention;

fig. 3 is a block diagram of the dc power system according to the present invention.

Detailed Description

The technical solutions 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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an AC/DC motor control system comprises a DC power supply, an inverter, a rectifier, a low-pass filter, a first relay and electric equipment, wherein the DC power supply is electrically connected with the inverter, the inverter is electrically connected with the rectifier, the rectifier is electrically connected with the low-pass filter, the low-pass filter is electrically connected with the electric equipment through the first relay, the power supply outputs DC in the DC power supply to the inverter, the DC is inverted into AC through the inverter and is output to the rectifier, the AC is converted into DC through the rectifier, the DC voltage is higher than that of the DC output by the power supply, the current is continuously transmitted to the low-pass filter, the frequency point of specific frequency in a power line or the frequency beyond the frequency point is effectively filtered through the low-pass filter, the current continuously enters the first relay and is output to the electric equipment through the first relay to control the electric equipment to start operation, guarantee that alternating current-direct current motor application range is extensive, be suitable for the different electrical apparatus that use of high low pressure simultaneously, guarantee the continuation of circuit work stable, need not hard to open or close the power many times, therefore, the clothes hanger is strong in practicability, direct current in the direct current power supply is exported to the dc-to-ac converter, invert into the alternating current through the dc-to-ac converter, and export to the rectifier, convert the alternating current to the direct current through the rectifier, compare the direct current voltage that begins power output and want high, and continue carrying the electric current to low pass filter in, carry out effective filtering through low pass filter to the frequency point of specific frequency in the power cord or the frequency beyond this frequency point, the electric current continues to enter into first relay, export control power equipment start-up work.

Specifically, the power supply device further comprises an alternating current power supply, a bridge rectifier circuit, a smoothing reactor, a three-phase bridge inverter circuit, a filter, power equipment, a current-voltage transformer and a processor, wherein the alternating current power supply is electrically connected with the bridge rectifier circuit, the bridge rectifier circuit is electrically connected with the smoothing reactor, the smoothing reactor is electrically connected with the three-phase bridge inverter circuit, the three-phase bridge inverter circuit is electrically connected with the filter, the filter is electrically connected with a second relay, the second relay is electrically connected with the power equipment, the alternating current power supply outputs alternating current to the bridge rectifier circuit, the input current is rectified by the bridge rectifier circuit to become direct current and output to the smoothing reactor, the input current is stabilized by the smoothing reactor and then is conveyed to the three-phase bridge inverter circuit, the inverted current is transmitted to the filter by the three-phase bridge inverter circuit, and specific frequency in a power line is adjusted by the filter The frequency point of the rate or the frequency beyond the frequency point is effectively filtered to obtain a power signal with a specific frequency and the power signal is transmitted to a second relay and is transmitted to power equipment through the second relay to control the power equipment to start, the first relay and the second relay are both electrically connected with a controller, the controller controls to start the first relay or the second relay, an alternating current power supply outputs alternating current to a bridge rectifier circuit, the input current is rectified by the bridge rectifier circuit to be direct current and is output to a smoothing reactor, the input current is conveyed to a three-phase bridge inverter circuit after being stabilized by the smoothing reactor, the inverted current is transmitted to a filter through the three-phase bridge inverter circuit and the frequency point with the specific frequency or the frequency beyond the frequency point in a power line is effectively filtered through the filter, and obtaining a power supply signal with a specific frequency, transmitting the power supply signal to the second relay, and transmitting the power supply signal to the power equipment through the second relay to control the power equipment to start and work.

Specifically, a temperature sensor is arranged on the outer wall of the power equipment, the temperature sensor is electrically connected with a controller, the controller is electrically connected with a pulse width modulation circuit, the pulse width modulation circuit is electrically connected with a three-phase bridge inverter circuit, the pulse width modulation circuit is electrically connected with an inverter, the temperature sensor detects the overhigh temperature of the power equipment, transmits a detection signal to the controller, judges and starts the pulse width modulation circuit through the controller, transmits processed current signals and the like to the pulse width modulation circuit, transmits inversion control signals back to the three-phase bridge inverter circuit and the inverter, transmits the inverted current to a filter and a rectifier through the three-phase bridge inverter circuit and the inverter respectively, and effectively filters the frequency point of specific frequency in a power line or the frequency beyond the frequency point through the filter and a low-pass filter, and obtaining a power supply signal with a specific frequency and transmitting the power supply signal to the power equipment through the first relay and the second relay.

Specifically, temperature sensor electric connection has the display, the display is used for showing the numerical value that temperature sensor detected.

In particular, the electrical device may be a high-voltage or low-voltage electrical device.

The working principle is as follows: the invention controls to open a first relay or a second relay through a controller, outputs direct current in a direct current power supply to an inverter, inverts the direct current into alternating current through the inverter and outputs the alternating current to a rectifier, converts the alternating current into the direct current through the rectifier, has higher voltage than the direct current output by the power supply, continuously transmits the current to a low-pass filter, effectively filters a frequency point of a specific frequency in a power line or frequencies except the frequency point through the low-pass filter, continuously transmits the current into a first relay, outputs the current to power equipment through the first relay to control the power equipment to start, or outputs the alternating current to a bridge rectifier circuit through an alternating current power supply, rectifies the input current into the direct current through the bridge rectifier circuit and outputs the direct current to a smoothing reactor, stabilizes the voltage of the input current through the smoothing reactor and then transmits the direct current to a three-phase bridge inverter circuit, the current after inversion is transmitted to the filter through the three-phase bridge type inverter circuit, the frequency point of specific frequency in the power line or the frequency except the frequency point is effectively filtered through the filter, a power signal of the specific frequency is obtained and transmitted to the second relay, and the power signal is transmitted to the power equipment through the second relay to control the power equipment to be started.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.