CN-121979015-A - Switch control circuit

CN121979015ACN 121979015 ACN121979015 ACN 121979015ACN-121979015-A

Abstract

The application provides a switch control circuit, and relates to the technical field of high-voltage circuit control. The power supply system comprises a high-voltage direct current power supply and electric equipment, wherein the switch control circuit comprises a control module, a driving module, a plurality of transformation modules, a plurality of rectification modules and an IGBT switch module, the input end of the driving module is connected with the control module, the transformation modules are connected with the driving module, the rectification modules are connected with the transformation modules, the input ends of the IGBT switch modules are connected with the high-voltage direct current power supply, the output ends of the IGBT switch modules are connected with the electric equipment, the IGBT switch module comprises a plurality of IGBT units which are sequentially connected in series, the IGBT units are connected with the rectification modules, and the IGBT units are used for controlling the on-off of the high-voltage direct current power supply to supply power to the electric equipment. The application can realize low-cost design and small-volume integration, and has high-reliability operation and high-speed response performance.

Inventors

PAN XUANTONG
WANG JUNFANG

Assignees

深圳市禾越生物科技有限公司

Dates

Publication Date: 20260505
Application Date: 20251212

Claims (10)

1. A switch control circuit for a power supply system, the power supply system including a high voltage dc power supply and a powered device, the switch control circuit comprising: the control module is used for outputting a first signal; The input end of the driving module is connected with the control module and is used for carrying out level conversion on the first signal to form a second signal; The transformer modules are integrated on the circuit board and comprise ferrite, primary coil windings and secondary coil windings, wherein the primary coil windings and the secondary coil windings are wound at two ends of the ferrite, embedded in the circuit board and connected with the driving module and used for transforming the second signals to form third signals: The rectification modules are connected with the secondary coil winding and used for rectifying the third signal to form a fourth signal; the IGBT switch module, IGBT switch module's input with high voltage direct current power supply is connected, IGBT switch module's output with the consumer is connected, IGBT switch module includes a plurality of IGBT units of series connection in proper order, IGBT unit with rectifier module connects, IGBT unit is used for according to fourth signal control high voltage direct current power supply to the break-make of consumer power supply.
2. The switch control circuit according to claim 1, wherein the wiring board includes a first substrate, a second substrate, and a third substrate which are stacked in this order, and the secondary coil winding includes: The first copper foil coil is arranged on the first substrate, a first via hole is formed in the first substrate, the starting end of the first copper foil wire is connected with the rectifying module, and the ending end of the first copper foil wire is connected with the first via hole; the first copper foil coil is arranged on the first substrate, the initial end of the first copper foil coil is connected with the terminal end of the first copper foil coil through the first through hole, the first through hole is arranged in the first substrate, and the terminal end of the first copper foil coil is connected with the first through hole; the third copper foil coil is arranged on the third substrate, the starting end of the third copper foil coil is connected with the terminal end of the second copper foil coil through the second via hole, and the terminal end of the third copper foil coil is connected with the rectifying module.
3. The switch control circuit of claim 2, wherein the primary coil winding comprises: and the fourth copper foil coil is arranged in any one of the first substrate, the second substrate and the third substrate, and is connected with the driving module.
4. The switch control circuit of claim 1, wherein the drive module comprises: The input end of the controller is connected with the control module, and the first output end and the second output end of the controller are connected with the primary coil winding of each transformation module; The first amplitude limiting unit is connected with the first output end of the controller; And the second amplitude limiting unit is connected with the second output end of the controller.
5. The switch control circuit of claim 4, wherein the switch control circuit further comprises: The low-voltage direct current power supply end is connected with the driving module and is used for conveying a power supply to the driving module; the first clipping unit includes: the anode of the first diode is connected with the first output end of the controller, and the cathode of the first diode is connected with the low-voltage direct-current power supply end; And the anode of the second diode is connected with the low-voltage direct current power supply end, and the cathode of the second diode is connected with the first output end of the controller.
6. The switch control circuit of claim 4, wherein the drive module further comprises: The first filtering unit is respectively connected with the first output end of the controller and the primary coil winding of each transformation module; the second filtering unit is respectively connected with the second output end of the controller, the primary coil winding of each transformation module and the first filtering unit.
7. The switch control circuit of claim 6, wherein the first filtering unit comprises: One end of the first capacitor is connected with a first output end of the controller, and the other end of the first capacitor is connected with a primary coil winding of each transformation module; and one end of the first resistor is connected with the other end of the first capacitor, and the other end of the first resistor is connected with the second filtering unit.
8. The switch control circuit of claim 1, wherein the rectifying module comprises: the anode of the third diode is connected with the secondary coil winding, and the cathode of the third diode is connected with the IGBT unit; and one end of the second resistor is connected with the cathode of the third diode, and the other end of the second resistor is respectively connected with the secondary coil winding and the IGBT unit.
9. The switch control circuit of claim 1, wherein the switch control circuit further comprises: the current limiting module is respectively connected with the input end of the IGBT switch module and the high-voltage direct-current power supply; the IGBT switching module further includes: and the plurality of current limiting units are connected with any two adjacent IGBT units through at least one current limiting unit.
10. The switch control circuit of claim 1, wherein the switch control circuit further comprises: And the communication module is respectively connected with the control module and the upper computer, so that the control module can realize remote communication with the upper computer.

Description

Switch control circuit Technical Field The application relates to the technical field of high-voltage circuit control, in particular to a switch control circuit. Background In the field of high-voltage circuit control, a vacuum high-voltage relay is a core element for realizing circuit on-off control, and the working principle of the vacuum high-voltage relay is that a platinum contact welded by memory metal is controlled to realize short circuit or open circuit by an external circuit and sealed in a vacuum ceramic cavity or a glass cavity, so that the switching function is completed. However, the existing vacuum high-voltage relay has a plurality of technical defects, and is difficult to meet the development demands of light weight, low cost, high speed and high reliability of the current electronic equipment. In terms of cost, the whole design adopts a large amount of noble metals such as platinum contacts, rare earth magnets, brass wires, memory conductive metals and the like, and the assembled components are fixed in a high-sealing insulating material cavity and are processed through complicated processes such as vacuumizing and sealing, so that the single-contact relay is high in price and low in production efficiency. In terms of volume, the main body of the vacuum high-voltage relay needs to be packaged again after production, the volume is further increased after packaging, the problem of difficult layout easily occurs in the design of a high-density circuit board, and the design of the appearance of an electronic product is limited. In the aspects of reliability and response speed, if a vacuum device is knocked and cracked in the transportation process, a platinum contact point is ignited and arcing due to vacuum disappearance, so that a component is damaged, the on time is influenced by the delay characteristic of a winding inductor, the single opening and closing time is 10-20 milliseconds, and the high-speed switch design requirement cannot be met. In summary, the existing high-voltage on-off control circuit adopting the vacuum high-voltage relay has a short board which cannot be ignored in the aspects of cost control, volume optimization, transportation reliability, response speed and the like, and a switch control circuit with low cost, small volume, high reliability and high-speed response characteristic is required to be designed to realize on-off control of the high-voltage circuit. Disclosure of Invention The application mainly aims to provide a switch control circuit which can realize low-cost design and small-volume integration and has high-reliability operation and high-speed response performance. The application provides a switch control circuit which is applied to a power supply system and comprises a high-voltage direct-current power supply and electric equipment, wherein the switch control circuit comprises a control module, a driving module, a plurality of transformation modules, a plurality of rectification modules and an IGBT switch module, the control module is used for outputting a first signal, the input end of the driving module is connected with the control module and used for carrying out level conversion on the first signal to form a second signal, the transformation modules are integrated on a circuit board and comprise ferrite, primary coil windings and secondary coil windings which are wound at two ends of the ferrite, the primary coil windings and the secondary coil windings are embedded in the circuit board, the primary coil windings are connected with the driving module, the transformation modules are used for carrying out transformation on the second signal to form a third signal, the rectification modules are connected with the secondary coil windings, the rectification modules are used for rectifying the third signal to form a fourth signal, the input end of the IGBT switch module is connected with the high-voltage direct-current power supply, the electric equipment is connected with the electric equipment, and the IGBT switch module is connected with the power supply unit in series according to the high-voltage direct-current power supply, and the IGBT switch unit is connected with the power supply unit in sequence. According to the switch control circuit provided by the embodiment of the application, compared with the scheme of the existing high-voltage on-off control circuit adopting the vacuum high-voltage relay, in the application, a stable fourth signal is output through the coordination among the control module, the driving module, the plurality of transformation modules and the plurality of rectification modules, and then the on-off of the IGBT unit is controlled through the fourth signal, so that the on-off of the high-voltage direct-current power supply for supplying power to the electric equipment is controlled, and the switch control circuit has high-reliability operation and high-speed response performance on the basis of realizing low-cost design and