Three-station motor control system

Abstract

The utility model provides a three-station motor control system. The three-station motor control system comprises a power supply module, a station detection module, a main control module, a first driving module, a second driving module and a man-machine interaction module, the power supply module is used for supplying power; the station detection module is used for detecting the station state of the three-station main switch and sending a station detection signal to the main control module; the main control module controls the corresponding action of the motor through the first driving module and controls the corresponding action of the electromagnetic brake through the second driving module according to the station detection signal; the motor is used for driving the three-station main switch to perform station switching; the electromagnetic brake is used for braking the motor; according to the utility model, the station state of the three-station main switch can be detected in real time, so that the main control module can control the motor and the electromagnetic brake to perform corresponding actions, and the station state of the three-station main switch can be displayed.

Description

Technical Field

[0001] The utility model relates to a control system, in particular to a three-station motor control system. Background Art

[0002] High-voltage gas-insulated switchgear (GIS) and medium- and low-voltage switchgear are widely used in power systems for the transmission and distribution of electricity. The main switch in these switchgear typically has three positions: isolation-on, isolation-off, and grounding-on, which are used to switch between different states of the switchgear. When the main switch is in the isolation-on position, the switchgear can supply power to the load. When the main switch is in the isolation-off position, the switchgear disconnects the power supply to the load. When the main switch is in the grounding-on position, maintenance and inspection of the switchgear and the load can be carried out.

[0003] The main switch's position switching is driven by a motor, and the switchgear is also equipped with an electromagnetic brake. When the motor starts to switch the main switch from one position to another, the electromagnetic brake must be released, allowing the motor to start. When the main switch switches to another position, the motor must be stopped and the electromagnetic brake engaged. Furthermore, the switchgear must clearly display the current position status of the main switch to facilitate operator observation and prevent live operation. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the embodiment of the present invention provides a three-station motor control system. The station detection module can detect the station status of the three-station main switch in real time, so that the main control module can control the motor and electromagnetic brake to perform corresponding actions, and can display the station status of the three-station main switch to facilitate observation by the operator. To achieve the above technical objectives, the technical solutions adopted in the embodiment of the present invention are:

[0005] The embodiment of the utility model provides a three-station motor control system, comprising: a power supply module, a station detection module, a main control module, a first drive module, a second drive module and a human-computer interaction module;

[0006] The power supply module is used to supply power to the workstation detection module, the main control module, the first drive module, the second drive module and the human-computer interaction module;

[0007] The station detection module is used to detect the station status of the three-station main switch and send a station detection signal to the main control module;

[0008] The main control module controls the corresponding action of the motor through the first drive module and the corresponding action of the electromagnetic brake through the second drive module according to the workstation detection signal; the motor is used to drive the three-position main switch to switch the workstation; the electromagnetic brake is used to brake the motor;

[0009] The human-computer interaction module is used to display the position status of the three-position main switch and provide operation control functions.

[0010] Specifically, the workstation detection module includes three workstation detection circuits; any one of the workstation detection circuits includes: diodes D1, D2, resistors R1, R2, R3, R4, a voltage regulator diode Z1, and a photocoupler OP1;

[0011] The anode of the diode D1 is connected to a work position indication signal P1, and the cathode is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the anode of the voltage-stabilizing diode Z1, one end of the resistor R3 and the input side anode of the photoelectric coupler OP1; the input side cathode of the photoelectric coupler OP1 is connected to the other end of the resistor R3, the anode of the voltage-stabilizing diode Z1 and one end of the resistor R2; the other end of the resistor R2 is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the common end P- of the three-way work position detection circuit; the output side collector of the photoelectric coupler OP1 is connected to the positive voltage VCC1, and the output side emitter of the photoelectric coupler OP1 is grounded GND through the resistor R4, and is used as an output end to send the work position detection signal P1_I to the main control module.

[0012] Specifically, the resistance of the resistor R1 is tens of kilo-ohms.

[0013] Specifically, the resistance of the resistor R2 is tens of kilo-ohms.

[0014] Specifically, the resistance of the resistor R3 is several thousand ohms.

[0015] Specifically, the resistance of the resistor R4 is 8 kilo-ohms to 15 kilo-ohms.

[0016] Specifically, the human-computer interaction module includes a display module and an operation module, wherein the display module is used to display the station status of the three-station main switch, and the operation module provides control buttons for inputting operation instructions to the main control module.

[0017] The beneficial effects of the technical solution provided by the embodiment of the present invention are: on the one hand, the present invention can detect the position status of the three-position main switch in real time, so that the main control module can control the motor and the electromagnetic brake to perform corresponding actions, thereby ensuring that the motor can smoothly drive the three-position main switch to switch positions; on the other hand, the position status of the three-position main switch can be displayed, which is convenient for the operator to observe, thereby ensuring the safety of the operator and avoiding live operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an electrical block diagram of the control system in an embodiment of the present utility model.

[0019] Figure 2This is a circuit diagram of the workstation detection module in an embodiment of the present utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] like Figure 1 As shown, a three-station motor control system proposed in an embodiment of the present invention includes: a power supply module, a station detection module, a main control module, a first drive module, a second drive module and a human-computer interaction module;

[0022] The power supply module is used to supply power to the workstation detection module, the main control module, the first drive module, the second drive module and the human-computer interaction module;

[0023] The station detection module is used to detect the station status of the three-station main switch and send a station detection signal to the main control module;

[0024] The main control module controls the corresponding action of the motor through the first drive module and the corresponding action of the electromagnetic brake through the second drive module according to the workstation detection signal; the motor is used to drive the three-position main switch to switch the workstation; the electromagnetic brake is used to brake the motor;

[0025] The human-computer interaction module is used to display the position status of the three-position main switch and provide operation control functions.

[0026] In this embodiment, the three-position main switch includes three positions: isolation closed position, isolation open position, and ground closed position. The three-position main switch outputs one corresponding position indication signal at each position. In other words, the three-position main switch outputs three position indication signals in total.

[0027] like Figure 2 As shown, the workstation detection module includes three workstation detection circuits; any one of the workstation detection circuits includes: diodes D1, D2, resistors R1, R2, R3, R4, a voltage regulator diode Z1, and a photocoupler OP1;

[0028] The anode of the diode D1 is connected to a work position indication signal P1, and the cathode is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the anode of the voltage-stabilizing diode Z1, one end of the resistor R3, and the input side anode of the photoelectric coupler OP1; the input side cathode of the photoelectric coupler OP1 is connected to the other end of the resistor R3, the anode of the voltage-stabilizing diode Z1, and one end of the resistor R2; the other end of the resistor R2 is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the common end P- of the three-way work position detection circuit; the output side collector of the photoelectric coupler OP1 is connected to the positive voltage VCC1, and the output side emitter of the photoelectric coupler OP1 is grounded GND through the resistor R4, and serves as an output end for sending the work position detection signal P1_I to the main control module;

[0029] The resistance of resistor R1 is several tens of kilo-ohms, for example, 75 kilo-ohms.

[0030] The resistance of resistor R2 is several tens of kilo-ohms, for example, 75 kilo-ohms.

[0031] The resistance of resistor R3 is several thousand ohms, for example, 2 kiloohms.

[0032] The resistance of resistor R4 is 8 kilo-ohms to 15 kilo-ohms, for example, 10 kilo-ohms.

[0033] The three-position main switch has three positions: isolation closed, isolation open, and grounding closed. The isolation open position is located in the middle, and the isolation closed and grounding closed positions are located on both sides. It can be switched from the isolation closed position to the isolation open position to the grounding closed position in sequence, but cannot jump directly from the isolation closed position to the grounding closed position, or vice versa.

[0034] For example, when the motor drives the three-position main switch to switch from the isolated closed position to the isolated open position, when the three-position main switch switches to the isolated open position, the corresponding position indication signal P1 outputs a high level, and in the corresponding position detection circuit, the input side of the photoelectric coupler OP1 is turned on, and the collector and emitter on the output side are also turned on, and the position detection signal P1_I sent to the main control module is a high level; at this time, the main control module controls the motor to stop through the first drive module, and controls the electromagnetic brake through the second drive module to brake the motor; the first drive module and the second drive module can both be composed of relay circuits; the motor is a DC motor and can be reversed; when switching is required again, the main control module first controls the electromagnetic brake to release through the second drive module, and then controls the motor to rotate through the first drive module;

[0035] The human-computer interaction module includes a display module and an operation module, wherein the display module is used to display the station status of the three-station main switch, and the operation module provides control buttons for inputting operation instructions to the main control module;

[0036] The main control module adopts a PLC controller;

[0037] The power supply module provides the low-voltage direct current required by the work station detection module, the main control module, the first drive module, the second drive module and the human-computer interaction module. For example, the positive voltage VCC required by the work station detection module is 3.3v, which is provided by the power supply module; the power supply module includes a step-down circuit and a voltage stabilizing circuit, etc.

[0038] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A three-station motor control system, characterized in that: include: Power supply module, station detection module, main control module, first drive module, second drive module and human-computer interaction module; The power supply module is used to supply power to the workstation detection module, the main control module, the first drive module, the second drive module and the human-computer interaction module; The station detection module is used to detect the station status of the three-station main switch and send a station detection signal to the main control module; The main control module controls the corresponding action of the motor through the first drive module and the corresponding action of the electromagnetic brake through the second drive module according to the workstation detection signal; the motor is used to drive the three-position main switch to switch the workstation; the electromagnetic brake is used to brake the motor; The human-computer interaction module is used to display the position status of the three-position main switch and provide operation control functions.

2. The three-station motor control system according to claim 1, characterized in that: The workstation detection module includes three workstation detection circuits; any one of the workstation detection circuits includes: diodes D1, D2, resistors R1, R2, R3, R4, a voltage stabilizing diode Z1, and a photoelectric coupler OP1; The anode of the diode D1 is connected to a work position indication signal P1, and the cathode is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the anode of the voltage-stabilizing diode Z1, one end of the resistor R3 and the input side anode of the photoelectric coupler OP1; the input side cathode of the photoelectric coupler OP1 is connected to the other end of the resistor R3, the anode of the voltage-stabilizing diode Z1 and one end of the resistor R2; the other end of the resistor R2 is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the common end P- of the three-way work position detection circuit; the output side collector of the photoelectric coupler OP1 is connected to the positive voltage VCC1, and the output side emitter of the photoelectric coupler OP1 is grounded GND through the resistor R4, and is used as an output end to send the work position detection signal P1_I to the main control module.

3. The three-station motor control system according to claim 2, characterized in that: The resistance of the resistor R1 is tens of kilo-ohms.

4. The three-station motor control system according to claim 2, characterized in that: The resistance of the resistor R2 is tens of kilo-ohms.

5. The three-station motor control system according to claim 2, characterized in that: The resistance of the resistor R3 is several thousand ohms.

6. The three-station motor control system according to claim 2, characterized in that: The resistance of the resistor R4 is 8 kilo-ohms to 15 kilo-ohms.

7. The three-station motor control system according to claim 2, characterized in that: The human-computer interaction module includes a display module and an operation module, wherein the display module is used to display the position status of the three-position main switch, and the operation module provides control buttons for inputting operation instructions to the main control module.

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