A power module for a monorail control system

Abstract

This invention provides a power module for a monorail crane control system, including a DC power input circuit, a DC power input module, a switching power supply, and a pre-charge board. The DC power input module charges the inverter core, and the switching power supply provides DC power to the switching power supply board, the main contactor control circuit, and the pre-charge control circuit. The main contactor control circuit is used to control the main contactor to engage or disengage. The pre-charge control circuit is used to suppress inrush current. The fan control circuit is used to control the operation of the fan, which is used to dissipate heat from the core. This invention optimizes the surge suppression and voltage protection of the charging circuit to ensure the stability of the monorail crane control system.

Description

Technical Field

[0001] This utility model relates to underground transportation devices in coal mines, specifically a power module for a monorail control system. Background Technology

[0002] A monorail system uses an I-beam suspended above a tunnel as a track, with various functional suspension vehicles connected together to form a train, which is then pulled along the track by traction equipment. Its traction force can be provided by wire rope, diesel engine, storage battery, lithium battery, or pneumatic power unit. Among these, the drive unit of an electrically driven monorail, such as one powered by a storage battery or lithium battery, is an electric motor.

[0003] The current inverter's charging circuit may cause inrush current when the main circuit is powered on during pre-charging, affecting system stability;

[0004] Fan control is mostly in continuous operation mode, keeping the equipment running regardless of whether it is working or not, resulting in energy waste;

[0005] Traditional relays do not integrate surge protection components, and electromagnetic interference is easily generated when the coil is de-energized, which affects the reliability of the control system. Utility Model Content

[0006] This invention provides a power module for a monorail control system, which introduces a pre-charge board and a freewheeling diode to optimize surge suppression and voltage protection in the charging circuit.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A power supply module for a monorail crane control system includes:

[0009] The DC power input circuit includes a DC power input module, a switching power supply, and a pre-charge board. The DC power input module charges the inverter core, and the switching power supply provides DC power to the switching power supply board, the main contactor control circuit, and the pre-charge control circuit.

[0010] The main contactor control circuit is used to control the main contactor to engage or disengage;

[0011] A pre-charge control circuit is used to suppress inrush current;

[0012] The fan control circuit is used to control the operation of the fan, which is used to dissipate heat from the core components.

[0013] Furthermore, a switching power supply is installed at the end of the DC power input module. The two output terminals of the switching power supply are connected to two output wires one. The two output wires one is connected to two output wires two and two output wires three respectively. The other end of the two output wires two is connected to the power input port of the switching power supply board. A precharge board is installed at the end of the two output wires three.

[0014] Furthermore, a fuse and a relay are connected in series at the DC power input module, and a precharge board is connected in parallel at the relay.

[0015] Furthermore, one end of the main contactor control circuit is connected to the control terminal of the main contactor, while the coil of the main contactor is connected in reverse parallel with the freewheeling diode.

[0016] Furthermore, the precharge control circuit includes relay two, and the output terminal of the precharge board is connected to relay two located on the switching power supply board via a wire.

[0017] Furthermore, the main contactor control circuit includes relay three, and output wire one is connected to relay three.

[0018] Furthermore, the fan control circuit includes relay four, and output wire one is connected to relay four. The main contactor control circuit includes relay three, and several fans are connected in parallel at output wire two.

[0019] This invention improves the control of the charging circuit by adding a pre-charge board to the inverter charging circuit, and prevents peak voltage when the main contactor is engaged or disengaged by connecting a freewheeling diode in series with the charging contactor coil. It also adds two cooling fans inside the mechanism to better dissipate heat and ensure the stability of the monorail control system. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the power module of this utility model.

[0022] Figure 2 This is the wiring diagram for the monorail control system of this utility model. Detailed Implementation

[0023] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims:

[0024] like Figure 1 As shown, this utility model provides a power module for a monorail crane control system, comprising:

[0025] The DC power input circuit includes a DC power input module, a switching power supply 1, and a pre-charge board 2. The DC power input module charges the inverter core, and the switching power supply 1 provides DC power to the switching power supply board 3, the main contactor control circuit, and the pre-charge control circuit. This utility model improves the control of the charging circuit by adding a pre-charge board 2.

[0026] The main contactor control circuit RO1 is used to control the main contactor K1 to engage or disengage.

[0027] The precharge control circuit RO2 controls the connection and disconnection of the precharge board 3 to suppress surge current.

[0028] The fan control circuit RO3 is used to control the operation of fan 4. The fan is used to dissipate heat from the core component, accelerate the airflow circulation inside the explosion-proof chamber, and better dissipate heat. The core component here is the part on the left side of the switching power supply board 3 in the figure.

[0029] The precharge board 2 is switched on and off by the signal of the precharge control circuit RO2. During charging, the switching power supply 1 charges the electrolytic capacitor of the frequency converter through the precharge board 2 to suppress the surge current; after the precharge is completed, the trigger signal of the main contactor control circuit RO1 activates the main contactor K1, and at the same time disconnects the signal of the precharge control circuit RO2, thus removing the precharge board 2 from the circuit.

[0030] like Figure 2 The main contactor control circuit RO1 is configured to connect and disconnect the main contactor K1 via the CAN bus. The precharge control circuit RO2 is configured to connect and disconnect the precharge board 2 via the CAN bus.

[0031] During operation, the precharge board 2 is precharged first. After the precharge is completed, the main contactor K1 is engaged, and the precharge control circuit R02 is disconnected.

[0032] In one embodiment of this utility model, a switching power supply 1 is installed at the end of the DC power input module. Two output terminals of the switching power supply 1 are connected to two output wires 5. Two output wires 6 and two output wires 7 are connected to the two output wires 5 respectively. The other end of the two output wires 6 is connected to the power input port of the switching power supply board 3. A precharge board 2 is installed at the end of the two output wires 7.

[0033] In one embodiment of this utility model, a fuse 8 and a relay 9 are connected in series at the DC power input module, and a precharge board 10 is connected in parallel at the relay 9. The relay 9 is used to control the connection and disconnection of the precharge board 10, and the fuse 8 provides protection.

[0034] In one embodiment of this utility model, one end of the main contactor control circuit is connected to the control terminal of the main contactor K1, and the coil of the main contactor K1 is connected in reverse parallel with the freewheeling diode D1. The freewheeling diode D1 absorbs the energy of any peak voltage that occurs when the main contactor K1 is engaged or disengaged.

[0035] In one embodiment of this utility model, the precharge control circuit RO2 includes a second relay 11, and the output end of the precharge board 2 is connected to the second relay 11 located on the switching power supply board 3 via a wire.

[0036] In one embodiment of this utility model, the main contactor control circuit RO1 includes a relay 312, and the output wire 5 is connected to the relay 312.

[0037] In one embodiment of this utility model, the fan control circuit RO3 includes a relay 4 13, an output wire 1 5 connected to the relay 4 13, and several fans 4 connected in parallel at the output wire 2 6. During fan control: relay 4 13 is activated, the fan control circuit RO3 operates, and the fans rotate. In this utility model, the number of fans is set to two.

[0038] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A power supply module for a monorail crane control system, characterized in that: include: The DC power input circuit includes a DC power input module, a switching power supply, and a pre-charge board. The DC power input module charges the inverter core, and the switching power supply provides DC power to the switching power supply board, the main contactor control circuit, and the pre-charge control circuit. The main contactor control circuit is used to control the main contactor to engage or disengage; A pre-charge control circuit is used to suppress inrush current; The fan control circuit is used to control the operation of the fan, which is used to dissipate heat from the core components.

2. The power supply module of the monorail crane control system according to claim 1, characterized in that: A switching power supply is installed at the end of the DC power input module. The two output terminals of the switching power supply are connected to two output wires one. The two output wires one is connected to two output wires two and two output wires three respectively. The other end of the two output wires two is connected to the power input port of the switching power supply board. A precharge board is installed at the end of the two output wires three.

3. The power supply module of the monorail crane control system according to claim 1, characterized in that: A fuse and a relay are connected in series at the DC power input module, and a precharge board is connected in parallel at the relay.

4. The power supply module of a monorail crane control system according to claim 2, characterized in that: One end of the main contactor control circuit is connected to the control terminal of the main contactor, and the coil of the main contactor is connected in reverse parallel with the freewheeling diode.

5. The power supply module of a monorail crane control system according to claim 2, characterized in that: The precharge control circuit includes relay two, and the output terminal of the precharge board is connected to relay two located on the switching power supply board via a wire.

6. The power supply module of a monorail crane control system according to claim 2, characterized in that: The main contactor control circuit includes relay three, and output wire one is connected to relay three.

7. The power supply module of a monorail crane control system according to claim 6, characterized in that: The fan control circuit includes relay four, and output wire one is connected to relay four. The main contactor control circuit includes relay three, and several fans are connected in parallel at output wire two.

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