CN-122026711-A - Switching power supply device for computer interlocking system

Abstract

The invention relates to the technical field of computer interlocking systems, in particular to a switching power supply device for a computer interlocking system. The device comprises a protection module, a first filtering module, a PFC module, a second filtering module, a DC-DC module, a control module and a detection module which are sequentially connected, wherein an output state port of the PFC module and a starting control port of the DC-DC module are respectively connected with the control module, the detection module is respectively connected with the DC-DC module and the control module, and the DC-DC module, the control module and the detection module all comprise external interfaces. Compared with the prior art, the invention has the advantages of compact structure, capability of effectively avoiding compatibility, improving the reliability of the system, reducing the cost of system development and maintenance, and the like.

Inventors

• JIANG QIZHU
• LIU DAMING
• YU YUANYUAN
• ZHANG LAN
• CHEN GUANG
• DU YUNFENG
• CHEN LIANGLIANG

Assignees

• 上海铁路通信有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (10)

1. 1. The switching power supply device for the computer interlocking system is characterized by comprising a protection module, a first filtering module, a PFC module, a second filtering module, a DC-DC module, a control module and a detection module which are sequentially connected, wherein an output state port of the PFC module and a starting control port of the DC-DC module are respectively connected with the control module, the detection module is respectively connected with the DC-DC module and the control module, and the DC-DC module, the control module and the detection module all comprise external interfaces.
2. 2. The switching power supply device for a computer interlocking system according to claim 1, wherein the DC-DC module includes a DC-DC unit and a voltage stabilizing filter circuit, an input end of the DC-DC unit is connected to an output end of the second filter module and to a start control port, an output end of the DC-DC unit is connected to the voltage stabilizing filter circuit and has a remote compensation external interface, a current detection point is provided on a negative output line of the voltage stabilizing filter circuit, and a voltage detection point is provided on a positive output line.
3. 3. The switching power supply device for a computer interlocking system according to claim 1, wherein the detection module comprises a voltage sampling circuit, a current sampling circuit and an over-temperature protection circuit, an input end of the voltage sampling circuit is connected with a voltage detection point of the DC-DC module, a voltage sampling port is connected with the control module, an input end of the current sampling circuit is connected with a current detection point of the DC-DC module, a current sampling port is connected with the control module, a fine tuning output port is connected with a fine tuning control port of the DC-DC module, and the over-temperature protection circuit comprises an over-temperature protection interface, and the over-temperature protection interface is connected with the control module.
4. 4. The switching power supply device for a computer interlocking system according to claim 3, wherein the voltage sampling circuit comprises a voltage sampling input end, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a transient suppression diode, a first capacitor and a second capacitor, the voltage sampling input end, the first resistor, the second resistor, the third resistor and the fourth resistor are sequentially connected, the other end of the fourth resistor is grounded, the transient suppression diode is connected in parallel with two ends of the fourth resistor, the fifth resistor is connected in parallel with two ends of the transient suppression diode after being connected in series with the first capacitor, the second capacitor is connected in parallel with two ends of the first capacitor, and an intersection point of the fifth resistor, the first capacitor and the second capacitor is a voltage sampling port.
5. 5. The switching power supply device for a computer interlocking system according to claim 3, wherein the current sampling circuit comprises a first amplifier, a second amplifier, a third amplifier and a fourth amplifier, an input end of the current sampling circuit is connected with an input end of the first amplifier through a plurality of resistors and capacitors, an output end of the first amplifier is respectively connected with the input ends of the second amplifier and the third amplifier through a plurality of resistors and capacitors, an output end of the second amplifier is connected with an input end of the fourth amplifier through a plurality of resistors, diodes and capacitors, a transmission circuit between the second amplifier and the fourth amplifier is connected with a current sharing control external interface, an output end of the third amplifier is connected with a current sampling port through a plurality of resistors and capacitors, and an output end of the fourth amplifier is connected with an output port through a plurality of trimming resistors, capacitors and diodes.
6. 6. The switching power supply device for a computer interlocking system according to claim 3, wherein the over-temperature protection circuit comprises a sixth resistor, a seventh resistor, a thermistor, a third capacitor, a fourth capacitor and a fifth capacitor, wherein the sixth resistor and the fourth capacitor are connected in series and then are connected in parallel at two ends of the third capacitor together, the thermistor is connected in parallel at two ends of the fourth capacitor, the seventh resistor and the fifth capacitor are connected in series and then are connected in parallel at two ends of the thermistor, and an intersection point of the seventh resistor and the fifth capacitor is an over-temperature protection interface.
7. 7. The switching power supply device for a computer interlocking system according to claim 1, wherein the control module comprises a singlechip control circuit and a remote switch control circuit, one end of the remote switch control circuit comprises a remote switch external interface, the other end of the remote switch control circuit is connected with the singlechip control circuit, and the singlechip control circuit is respectively connected with an output state port of the PFC module, a start control port of the DC-DC module and the detection module.
8. 8. The switching power supply unit for a computer interlock system according to claim 1, further comprising an auxiliary power supply module including an auxiliary power supply having an input connected to the DC-DC module and an output including a first load circuit connected between positive and negative outputs of the auxiliary power supply and a second load circuit connected to a ground pin of the auxiliary power supply.
9. 9. The switching power supply device for a computer interlocking system according to claim 1, further comprising a fan driving circuit, a fan speed regulating circuit and a fan control circuit, wherein an input end of the fan driving circuit is connected with the DC-DC module, an output end of the fan driving circuit is connected with corresponding interfaces of the fan speed regulating circuit and the fan control circuit, a fan controlled end of the fan control circuit is connected with the fan speed regulating circuit, and the fan driving circuit and the fan speed regulating circuit are connected with the control module.
10. 10. The switching power supply unit for a computer interlock system of claim 1 further comprising an indicator light circuit connected to the control module.

Description

Switching power supply device for computer interlocking system Technical Field The invention relates to the technical field of computer interlocking systems, in particular to a switching power supply device for a computer interlocking system. Background The iLOCK type computer interlocking system (hereinafter referred to as interlocking system) is an intelligent safety type computer interlocking system which is formed by adding an independent fault-safety check module and adopting NISAL technology on the basis of a general 2-out-of-2 safety structure. The interlocking system comprehensively utilizes the technologies of reaction fault-safety, combination fault-safety and inherent fault-safety, and adopts a double CPU voting output mode to form a comprehensive safety system with high safety performance. Currently, the power modules used in the power chassis of the interlocking system mainly depend on different suppliers in practice. Regarding the structure of the power module of the interlocking system, the sub-modules provided by different suppliers are easy to encounter compatibility problems during integration, and the circuit design of the power module is complex, so that the reliability of the power module is reduced, the debugging difficulty of the system is increased, the flexible maintenance and upgrading of the power module are limited, the power density and efficiency of the power module are improved, and the service life of the power module is shortened. However, the research on the improved design of the power module of the iLOCK type computer interlocking system is not quite enough through searching. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a switching power supply device for a computer interlocking system, which adopts a high-degree modularized design, is provided with a plurality of external control interfaces, has simple circuit, small volume and high reliability, has higher conversion efficiency, can ensure larger power density and has better universality. The aim of the invention can be achieved by the following technical scheme: The invention provides a switching power supply device for a computer interlocking system, which comprises a protection module, a first filtering module, a PFC module, a second filtering module, a DC-DC module, a control module and a detection module, wherein the protection module, the first filtering module, the PFC module, the second filtering module, the DC-DC module, the control module and the detection module are sequentially connected, an output state port of the PFC module and a starting control port of the DC-DC module are respectively connected with the control module, the detection module is respectively connected with the DC-DC module and the control module, and the DC-DC module, the control module and the detection module all comprise external interfaces. As an optimized technical scheme, the DC-DC module includes a DC-DC unit and a voltage stabilizing filter circuit, an input end of the DC-DC unit is connected to an output end of the second filter module and is connected to a start control port, an output end of the DC-DC unit is connected to the voltage stabilizing filter circuit and is provided with a remote compensation external interface, a current detection point is arranged on a negative output line of the voltage stabilizing filter circuit, and a voltage detection point is arranged on a positive output line. The detection module comprises a voltage sampling circuit, a current sampling circuit and an over-temperature protection circuit, wherein the input end of the voltage sampling circuit is connected with a voltage detection point of the DC-DC module, the voltage sampling port is connected with the control module, the input end of the current sampling circuit is connected with a current detection point of the DC-DC module, the current sampling port is connected with the control module, the fine tuning output port is connected with a fine tuning control port of the DC-DC module, and the over-temperature protection circuit comprises an over-temperature protection interface which is connected with the control module. As a preferred technical scheme, the voltage sampling circuit includes a voltage sampling input end, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a transient suppression diode, a first capacitor and a second capacitor, wherein the voltage sampling input end, the first resistor, the second resistor, the third resistor and the fourth resistor are sequentially connected, the other end of the fourth resistor is grounded, the transient suppression diode is connected in parallel with two ends of the fourth resistor, the fifth resistor is connected in series with the first capacitor and then is connected in parallel with two ends of the transient suppression diode, the second capacitor is connected in parallel with two ends of the first capac