Integrated electromagnetic protection switching power supply

Abstract

The present application relates to a comprehensive electromagnetic protection switching power supply, including an electromagnetic pulse protection module, an EMI filter module, an AC / DC conversion module and at least one DC / DC power supply module; the electromagnetic pulse protection module is connected to the EMI filter module and is also used to access the first alternating current; the EMI filter module is connected to the AC / DC conversion module; the AC / DC conversion module is connected to at least one DC / DC power supply module; the electromagnetic pulse protection module is used to discharge the energy generated by the electromagnetic pulse of the first alternating current, filter out high-frequency clutter signals, obtain the second alternating current and output it to the EMI filter module; the EMI filter module is used to filter the second alternating current, obtain the third alternating current and output it to the AC / DC conversion module; the AC / DC conversion module is used to convert the third alternating current into the first direct current and output it to the DC / DC power supply module, and the DC / DC power supply module is used to convert the first direct current into the second direct current and provide it to the load. In this way, the electromagnetic compatibility problem is solved and the normal operation of the comprehensive electromagnetic protection switching power supply and the back-end load is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of power supply devices, and in particular to a comprehensive electromagnetic protection switching power supply. Background Art

[0002] Compared with traditional linear power supplies, switching power supplies have the advantages of small size, light weight, high efficiency, reliable operation, and remote monitoring. They are widely used in various fields such as industry, communications, military, civil, and aviation, and have replaced linear power supplies in most application environments.

[0003] However, the power switch tube, rectifier or freewheeling diode and main power transformer inside the switching power supply generally work in a high-frequency switching mode, and their voltage and current waveforms are mostly square waves. In the process of high-voltage and high-current square wave switching, serious harmonic voltage and current are easily generated, resulting in high-order harmonic interference in the low-frequency band. These all bring about electromagnetic compatibility problems. At the same time, since many small electronic components are used in the switching power supply, it is easy to be affected by strong electromagnetic pulses and lightning surges, causing damage to the components and causing the power supply to fail to work normally. Summary of the invention

[0004] In view of this, the purpose of the present application is to overcome the deficiencies of the prior art and provide a comprehensive electromagnetic protection switching power supply.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] The present application provides a comprehensive electromagnetic protection switching power supply, including: an electromagnetic pulse protection module, an EMI filter module, an AC / DC conversion module and at least one DC / DC power supply module;

[0007] The electromagnetic pulse protection module is connected to the EMI filter module and is also used to access the external first alternating current; the EMI filter module is connected to the AC / DC conversion module; the AC / DC conversion module is connected to the at least one DC / DC power supply module;

[0008] The electromagnetic pulse protection module is used to discharge the energy generated by the electromagnetic pulse in the first alternating current and filter out high-frequency clutter signals to obtain a second alternating current and output it to the EMI filtering module;

[0009] The EMI filtering module is used to filter the high-frequency interference in the second alternating current to obtain a third alternating current and output it to the AC / DC conversion module;

[0010] The AC / DC conversion module is used to convert the third alternating current into a first direct current, and output the first direct current to the at least one DC / DC power supply module;

[0011] The at least one DC / DC power supply module is used to convert the first direct current into a second direct current to provide it to a load.

[0012] Optionally, the electromagnetic pulse protection module includes an electromagnetic pulse protection circuit, and the electromagnetic pulse protection circuit includes: a first varistor, a second varistor, a third varistor, a first inductor, a second inductor, a first capacitor, and a second capacitor;

[0013] The first end of the first inductor is connected to the first end of the second inductor through the first varistor, is grounded through the second varistor, and is connected to the live wire of the first alternating current, and the second end is grounded through the first capacitor;

[0014] The first end of the second inductor is grounded through the third varistor and connected to the neutral line of the first direct current, and the second end is grounded through the second capacitor;

[0015] The second end of the first inductor and the second end of the second inductor are connected to the EMI filtering module as output ends of the electromagnetic pulse protection module.

[0016] Optionally, the EMI filtering module includes a resonant circuit and a low-pass filtering circuit connected to the resonant circuit.

[0017] Optionally, the resonant circuit includes a third inductor and a third capacitor connected in series.

[0018] Optionally, the low-pass filter circuit includes a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first resistor, a fourth inductor, a fifth inductor, a sixth inductor and a seventh inductor;

[0019] The first end of the fourth inductor is connected to the first end of the fifth inductor through the fourth capacitor and the first resistor connected in parallel, and is also used to be connected to the first end of the resonant circuit, and the second end of the fourth inductor is connected to the first end of the fifth capacitor through the sixth inductor;

[0020] The first end of the fifth inductor is also used to be connected to the second end of the resonant circuit, and the second end is connected to the second end of the fifth capacitor through the seventh inductor;

[0021] The first end of the fifth capacitor is grounded through the sixth capacitor, and the second end is grounded through the seventh capacitor. The first end and the second end of the fifth capacitor are connected to the AC / DC conversion module as output ends of the low-pass filter circuit.

[0022] Optionally, the AC / DC conversion module includes an AC / DC conversion circuit and a PFC power factor correction circuit connected to each other; the AC / DC conversion circuit is used for rectification; and the PFC power factor correction circuit is used to improve the distortion of the current waveform and adjust the phase of the current and voltage to remain consistent.

[0023] Optionally, it also includes a control and communication module connected to the at least one DC / DC power supply module, and the control and communication module is used to collect data on the current and voltage output by the at least one DC / DC power supply module to control the on and off of each DC / DC power supply module.

[0024] Optionally, the DC / DC power supply module includes a DC / DC circuit; the DC / DC circuit includes: a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode and a sixth diode, an eighth inductor, a first transistor, a second transistor, a first photocoupler, a second photocoupler, a transformer and a PWM control chip; wherein the first end of the second resistor is used to access the first direct current, and the second end is grounded through the third resistor, the eighth capacitor and the first photoelectric coupler connected in parallel; the CSS pin of the PWM control chip is grounded through the ninth capacitor, the Fmax pin is grounded through the fourth resistor, the Ctimer pin is grounded through the fifth resistor and the tenth capacitor connected in parallel, the RT pin is grounded through the sixth resistor, the BO pin is connected to the second end of the second resistor, the FB pin is grounded through the twelfth capacitor and the output end of the second photoelectric coupler, the DT pin is grounded through the seventh resistor, the FF pin is grounded through the eighth resistor and the eleventh capacitor connected in parallel, and is connected to the ninth resistor and the tenth resistor and the first capacitor connected in parallel in sequence. The twelfth capacitor is grounded and connected to the cathode of the first diode, the Vboot pin is connected to the cathode of the second diode through the eleventh resistor and to the pin HB through the thirteenth capacitor, the Mupper pin is connected to the gate of the first transistor, the HB pin is connected to the emitter of the first transistor, the Vcc pin is grounded and connected to the working power supply end of the PWM control chip through the fourteenth capacitor, the Mlower pin is connected to the gate of the second transistor, the GND pin is grounded, and the SF pin is grounded; the input end of the second photocoupler is connected to the working power supply end of the second photocoupler through the twelfth resistor; the anode of the second diode is connected to the Vcc pin; the anodes of the first diodes are connected in parallel through The fifteenth capacitor and the thirteenth resistor connected in series are grounded and connected to the cathode of the third diode; the anode of the third diode is respectively connected to the cathode of the fourth diode, and is connected to the first input terminal of the transformer through the fourteenth resistor and the sixteenth capacitor in sequence; the anode of the fourth diode is grounded; the collector of the first transistor is used to access the first direct current, and the emitter is respectively connected to the collector of the second transistor and is connected to the second input terminal of the transformer through the eighth inductor; the emitter of the second transistor is grounded; the first input terminal of the transformer is grounded through the seventeenth capacitor, the first output terminal is grounded, the second output terminal is connected to the anode of the fifth diode, and the third output terminal is connected to the anode of the sixth diode;The cathode of the sixth diode is respectively connected to the cathode of the fifth diode and grounded through the eighteenth capacitor, and is also used to output a second direct current. ;

[0025] Optionally, a metal housing is also included.

[0026] Optionally, the metal shell includes a cover plate, a main shell and a connector for connecting the integrated electromagnetic protection switching power supply to the outside; wherein the connection position between the cover plate and the main shell and the connection position between the main shell and the connector are filled with conductive rubber material with electromagnetic shielding function.

[0027] The technical solution provided by this application may have the following beneficial effects:

[0028] In the scheme of the present application, an electromagnetic pulse protection module is used to discharge the energy generated by the electromagnetic pulse and filter out high-frequency clutter signals. An EMI filter module is used to filter high-frequency interference and filter out conducted interference generated by the equipment, thereby avoiding the electronic components in the integrated electromagnetic protection switching power supply from being affected by strong electromagnetic pulses and lightning surges, greatly reducing the probability of electronic components being damaged, and improving the stability of the internal operation of the integrated electromagnetic protection switching power supply. In addition, an AC / DC conversion module is used to rectify the input alternating current to obtain direct current, and at least one DC / DC power supply module is used to isolate the direct current output by the AC / DC conversion module, so that the branches where the output DC / DC power supply modules are located can be independent of each other, and the on and off of each branch does not interfere with each other. In this way, the problem of electromagnetic compatibility is solved and the normal operation of the integrated electromagnetic protection switching power supply and the back-end load is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of a comprehensive electromagnetic protection switching power supply provided by an embodiment of the present application.

[0031] Figure 2 It is a circuit diagram of an electromagnetic pulse protection module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0032] Figure 3 This is a circuit diagram of an EMI filtering module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0033] Figure 4 This is a circuit diagram of a DC / DC power supply module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0034] Figure 5 It is a circuit diagram of an AC / DC conversion circuit in an AC / DC conversion module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0035] Figure 6 It is a circuit diagram of a PFC power factor correction circuit in an AC / DC conversion module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0036] Figure 7 It is a structural schematic diagram of a comprehensive electromagnetic protection switching power supply provided by another embodiment of the present application.

[0037] Figure 8 It is a schematic diagram of the overall structure of a comprehensive electromagnetic protection switching power supply provided in another embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other implementation methods obtained by ordinary technicians in the field without creative work belong to the scope of protection of the present application.

[0039] See also Figure 1 , Figure 1 It is a structural schematic diagram of a comprehensive electromagnetic protection switching power supply provided by an embodiment of the present application.

[0040] This embodiment provides a comprehensive electromagnetic protection switching power supply, such as Figure 1 As shown, the integrated electromagnetic protection switching power supply 1 may specifically include: an electromagnetic pulse protection module 101, an EMI filtering module 102, an AC / DC conversion module 103 and n DC / DC power supply modules 104, wherein n is a positive integer greater than or equal to 1.

[0041] The electromagnetic pulse protection module 101 is connected to the EMI filter module 102 and is also used to access the external first alternating current through the input terminal Vin; the EMI filter module 102 is connected to the AC / DC conversion module 103; the AC / DC conversion module 103 is connected to at least one DC / DC power supply module 104.

[0042] The electromagnetic pulse protection module 101 is used to discharge the energy generated by the electromagnetic pulse in the first alternating current, and filter out the high-frequency clutter signal to obtain the second alternating current and output it to the EMI filtering module 102; the EMI filtering module 102 is used to filter the high-frequency interference in the second alternating current, obtain the third alternating current and output it to the AC / DC conversion module 103; the AC / DC conversion module 103 is used to convert the third alternating current into a first direct current, and output it to the DC / DC power supply module 104, and the n DC / DC power supply modules 104 are used to convert the first direct current into the second direct current to provide it to the load through the output terminal Vout.

[0043] In this embodiment, the electromagnetic pulse protection module is used to discharge the energy generated by the electromagnetic pulse and filter out high-frequency clutter signals. The EMI filter module is used to filter high-frequency interference and filter out conducted interference generated by the equipment, thereby avoiding the electronic components in the integrated electromagnetic protection switching power supply from being affected by strong electromagnetic pulses and lightning surges, greatly reducing the probability of electronic components being damaged, and improving the stability of the internal operation of the integrated electromagnetic protection switching power supply. In addition, the AC / DC conversion module is used to rectify the input alternating current to obtain direct current, and at least one DC / DC power supply module is used to isolate the direct current output by the AC / DC conversion module, so that the branches where the output DC / DC power supply modules are located can be independent of each other, and the on and off of each branch does not interfere with each other. In this way, the problem of electromagnetic compatibility is solved and the normal operation of the integrated electromagnetic protection switching power supply and the back-end load is guaranteed.

[0044] In a specific embodiment, the first external AC power can be 220V AC power, there can be 6 DC / DC power modules, and the six outputs are 24V-10A, 24V-5A, 24V-5A, 24V-5A, 12V-5A, and 5V-10A respectively. The integrated electromagnetic protection switching power supply is a power supply device with one 220V AC input and six DC outputs.

[0045] See also Figure 2 , Figure 2 It is a circuit diagram of an electromagnetic pulse protection module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0046] In some embodiments, Figure 2As shown, the electromagnetic pulse protection module 101 may include an electromagnetic pulse protection circuit, and the electromagnetic pulse protection circuit may include: a first varistor MOV1, a second varistor MOV2, a third varistor MOV3, a first inductor L1, a second inductor L2, a first capacitor C1, and a second capacitor C2; wherein, the first end of the first inductor L1 is connected to the first end of the second inductor L2 through the first varistor MOV1, the first end of the first inductor L1 is grounded through the second varistor MOV2, and the first end of the first inductor L1 is also connected to the first alternating current. The first inductor L1 is connected to the EMI filter module via the line L, and the second end of the first inductor L1 is grounded via the first capacitor C1; the first end of the second inductor L2 is grounded via the third varistor MOV3, the first end of the second inductor L2 is also connected to the neutral line N of the first direct current, and the second end of the second inductor L2 is grounded via the second capacitor C2; the second end of the first inductor L1 and the second end of the second inductor L2 are connected to the EMI filter module as the output end of the electromagnetic pulse protection module, wherein L' is the live line output end of the electromagnetic pulse protection module 101, and N' is the neutral line output end of the electromagnetic pulse protection module 101.

[0047] During implementation, after the first external input alternating current enters the electromagnetic pulse protection module, the first varistor, the second varistor and the third varistor in the electromagnetic pulse protection module can be used as primary protection to discharge the energy generated by the electromagnetic pulse; the first capacitor and the second capacitor are feed-through capacitors, which can be used as secondary protection to filter out high-frequency clutter signals to prevent other electronic components from being affected by strong electromagnetic pulses and lightning surges.

[0048] See also Figure 3 , Figure 3 This is a circuit diagram of an EMI filtering module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0049] like Figure 3 As shown, the EMI filter module 102 may include a resonant circuit 1021 and a low-pass filter circuit 1022 connected to the resonant circuit 1021. Wherein, L is the live wire input end of the EMI filter module 102, which is used to connect to the live wire output end of the electromagnetic pulse protection module; N is the neutral wire input end of the EMI filter module 102, which is used to connect to the neutral wire output end of the electromagnetic pulse protection module; L' is the live wire output end of the EMI filter module 102; N' is the neutral wire output end of the EMI filter module 102.

[0050] The resonance circuit 1021 may include a third inductor L3 and a third capacitor C3 connected in series.

[0051] Correspondingly, the low-pass filter circuit 1022 may specifically include a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a first resistor R1, a fourth inductor L4, a fifth inductor L5, a sixth inductor L6 and a seventh inductor L7; a first end of the fourth inductor L4 is connected to a first end of the fifth inductor L5 through a fourth capacitor C4 and a first resistor R1 connected in parallel, a first end of the fourth inductor L4 is also used to be connected to a first end of the resonant circuit 1021, and a second end of the fourth inductor L4 is connected to a first end of the resonant circuit 1021 through a sixth inductor L6 and a fifth inductor L7. The first end of the fifth inductor L5 is also used to connect to the second end of the resonant circuit 1021, and the second end of the fifth inductor L5 is connected to the second end of the fifth capacitor C5 through the seventh inductor L7; the first end of the fifth capacitor C5 is grounded through the sixth capacitor C6, and the second end of the fifth capacitor C5 is grounded through the seventh capacitor C7; wherein the fourth inductor and the fifth inductor are differential mode inductors; the sixth inductor and the seventh inductor are common mode inductors; the fourth capacitor and the fifth capacitor are differential mode capacitors; the sixth capacitor and the seventh capacitor are common mode capacitors.

[0052] See also Figure 4 , Figure 4 This is a circuit diagram of a DC / DC power supply module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0053] In some embodiments, Figure 4As shown, the DC / DC power supply module 104 may include a DC / DC circuit; the DC / DC circuit includes: a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a first diode D1, a second diode D2, and a third A diode D3, a fourth diode D4, a fifth diode D5 and a sixth diode D6, an eighth inductor L8, a first transistor Q1, a second transistor Q2, a first photocoupler P1, a second photocoupler P2, a transformer T and a PWM control chip U1; wherein the model of the PWM control chip U1 may be NCP1396ADR2G, the first end of the second resistor R2 is used to access the first direct current Vin' output by the AC / DC conversion module, and the second end of the second resistor R2 is grounded through the third resistor R3, the eighth capacitor C8 and the first photocoupler P1 connected in parallel; the CSS pin of the PWM control chip U1 is grounded through the ninth capacitor C9, the Fmax pin is grounded through the fourth resistor R4, and the Ctimer pin is connected to the ground. The RT pin is grounded through the sixth resistor R6, the BO pin is connected to the second end of the second resistor, the FB pin is grounded through the twelfth capacitor C12, the FB pin is also connected to the output end of the second photocoupler P2, the DT pin is grounded through the seventh resistor R7, the FF pin is grounded through the eighth resistor R8 and the eleventh capacitor C10 connected in parallel, the FF pin is also grounded through the ninth resistor R9, the tenth resistor R10 and the twelfth capacitor C12 connected in parallel, the FF pin is also connected to the cathode of the first diode D1, the Vboot pin is connected to the cathode of the second diode D2 through the eleventh resistor R11, and the Vboot pin is also connected to the HB pin through the thirteenth capacitor C13 , the Mupper pin is connected to the gate of the first transistor Q1, the HB pin is connected to the emitter of the first transistor Q1, the Vcc pin is grounded through the fourteenth capacitor C14, the Vcc pin is also connected to the working power supply terminal VCC of the PWM control chip U1, the Mlower pin is connected to the gate of the second transistor Q2, the GND pin is grounded, and the SF pin is grounded; the input end of the second photocoupler P2 is connected to the working power supply terminal VCC of the second photocoupler P2 through the twelfth resistor R12; the anode of the second diode D2 is connected to the Vcc pin; the anode of the first diode D1 is grounded through the fifteenth capacitor C15 and the thirteenth resistor R13 connected in parallel, and the anode of the first diode D1 is also connected to the cathode of the third diode D3;The anode of the third diode D3 is connected to the cathode of the fourth diode D4, and the anode of the third diode D3 is also connected to the first input terminal 1 of the transformer T through the fourteenth resistor R14 and the sixteenth capacitor C16 in sequence; the anode of the fourth diode D4 is grounded; the collector of the first transistor Q1 is used to access the first direct current output by the AC / DC conversion module, the emitter of the first transistor Q1 is connected to the collector of the second transistor Q2, and the emitter of the first transistor Q1 is also connected to the second input terminal 2 of the transformer T through the eighth inductor L8; the emitter of the second transistor Q2 is grounded; the first input terminal 1 of the transformer T is grounded through the seventeenth capacitor C17, the first output terminal 3 of the transformer T is grounded, the second output terminal 4 of the transformer T is connected to the anode of the fifth diode D5, and the third output terminal 5 of the transformer T is connected to the anode of the sixth diode D6; the cathode of the sixth diode D6 is connected to the cathode of the fifth diode D5, and the cathode of the sixth diode D6 is also grounded through the eighteenth capacitor C18, and the cathode of the sixth diode D6 is also used to output the second direct current as the output port Vout. ;

[0054] In a specific embodiment, the model of the transformer T may be PO2621, the first transistor and the second transistor may include a field effect transistor AOD11S60, the model of the first photocoupler and the second photocoupler may be TCLT1009, the model of the first diode, the fifth diode and the sixth diode may be IN4148WX-TP, the model of the second diode may be RSIM-13-F, and the model of the third diode and the fourth diode may be BAV99LT1G.

[0055] During specific implementation, the size of the second direct current output by each DC / DC power supply module can be set according to actual needs and is not limited here.

[0056] In some embodiments, the above-mentioned AC / DC conversion module may specifically include an AC / DC conversion circuit and a PFC power factor correction circuit connected to the AC / DC conversion circuit; the AC / DC conversion circuit is used to rectify the third alternating current output by the EMI filter module; the PFC power factor correction circuit is used to improve the distortion of the input alternating current waveform and adjust the phase of the current and voltage to keep them consistent.

[0057] During specific implementation, there may be multiple specific circuit structures of the AC / DC conversion circuit and the PFC power factor correction circuit, one of which is listed below for detailed description.

[0058] See also Figure 5 , Figure 5 It is a circuit diagram of an AC / DC conversion circuit in an AC / DC conversion module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0059] See also Figure 6 , Figure 6 It is a circuit diagram of a PFC power factor correction circuit in an AC / DC conversion module of an integrated electromagnetic protection switching power supply provided in another embodiment of the present application.

[0060] like Figure 5 As shown, the AC / DC conversion circuit may specifically include a rectifier bridge S, a nineteenth capacitor C19, a twentieth capacitor C20, a twenty-first capacitor C21, a ninth inductor L9, a tenth inductor L10, a seventh diode D7, an eighth diode D8, a ninth diode D9, a third transistor Q3, a fourth transistor Q4, a fifteenth resistor R15 and a sixteenth resistor R16; wherein, the two input ends of the rectifier bridge S are respectively connected to the live output end L' and the neutral output end N' of the EMI filter module as input ports of the AC / DC conversion module, the positive output end of the rectifier bridge S is connected to the first output port V1 of the AC / DC conversion circuit, the positive output end of the rectifier bridge S is connected to the positive electrode of the seventh diode D7, the positive output end of the rectifier bridge S is connected to the positive electrode of the ninth diode D9 through the ninth inductor L9, the positive output end of the rectifier bridge S is connected to the collector of the third transistor Q3 through the tenth inductor L10, the positive output end of the rectifier bridge S is also grounded through the nineteenth capacitor C19, and the rectifier bridge The negative output terminal of S is grounded; the gate of the third transistor Q3 is connected to the emitter of the third transistor Q3 through the fifteenth resistor R15, the emitter of the third transistor Q3 is grounded, and the collector of the third transistor Q3 is respectively connected to the positive electrode and the negative electrode of the eighth diode D8; the gate of the fourth transistor Q4 is connected to the emitter of the fourth transistor Q4 through the sixteenth resistor R16, the emitter of the fourth transistor Q4 is grounded, and the collector of the fourth transistor Q4 is respectively connected to the positive electrode and the negative electrode of the ninth diode D9; the cathode of the seventh diode D7 is connected to the cathode of the ninth diode D9; the cathode of the ninth diode D9 is connected to the cathode of the eighth diode D8, the cathode of the ninth diode D9 is grounded through the twentieth capacitor C20, the cathode of the ninth diode D9 is grounded through the twenty-first capacitor C21, and the cathode of the ninth diode D9 is also connected to the second output port V2 of the AC / DC conversion circuit; the second output port V2 of the AC / DC conversion circuit is the output port of the AC / DC conversion module.

[0061] like Figure 6As shown, the PFC power factor correction circuit may specifically include a PFC control chip U2, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, a thirty-second resistor R32, a twenty-second capacitor C22, a twenty-third capacitor C23, a twenty-fourth capacitor C24, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a twenty-seventh capacitor C27, a twenty-eighth capacitor C28, a twenty-ninth capacitor C29, a thirtieth capacitor C30, a thirty-first capacitor C31, a thirty-second capacitor C32, an eleventh inductor L11, and a twelfth inductor L12;Among them, the model of the PFC control chip U2 can be UCC28063, the ZCDB pin is grounded through the seventeenth resistor R17 and the eleventh inductor L11 connected in series, the ZCDB pin is also grounded through the twenty-second capacitor C22, the VFB pin is connected to the second output port V2 of the AC / DC conversion circuit through the eighteenth resistor R18, the VFB pin is grounded through the eighteenth resistor R18, the nineteenth resistor R19, the twentieth resistor R20 and the twenty-first resistor R21 and the twenty-third capacitor C23 connected in parallel in sequence, the VFB pin is also grounded through the twenty-second resistor R22 and the twenty-fourth capacitor C24 connected in parallel, the TSET pin is grounded through the twenty-third resistor R23, the PHB pin is grounded through the twenty-fourth resistor R24 ​​and the twenty-fifth capacitor C25 connected in series, the PHB pin is also grounded through the twenty-sixth capacitor C26, the CMP pin is connected to the PHB pin, the AGND pin is grounded, the VINAC pin is grounded through the twenty-fifth resistor R25 and the twenty-seventh capacitor C27 connected in parallel, the VINAC pin is grounded through the twenty-sixth resistor R26 and the The seventeenth resistor R27 is connected to the first output port V1 of the AC / DC conversion circuit, the VINAC pin is also connected to the ground through the twenty-sixth resistor R26, the twenty-seventh resistor R27, the twenty-ninth resistor R29 and the twenty-eighth capacitor C28 connected in parallel, the HVSEN pin is connected to the ground through the twenty-first resistor R21 and the twenty-third capacitor C23 connected in parallel, the CS pin is connected to the ground through the twenty-ninth capacitor C29, the CS pin is also connected to the negative output terminal of the rectifier bridge S in the AC / DC conversion circuit through the thirtieth resistor R30, the GB pin is connected to the gate of the fourth transistor Q4 in the AC / DC conversion circuit, the VCC pin is connected to the working power supply terminal of the PFC control chip U2 through the thirty-first resistor R31, the VCC pin is also connected to the ground through the thirtieth capacitor C30, the PGND pin is grounded, the GA pin is connected to the gate of the third transistor Q3 in the AC / DC conversion circuit, the VREF pin is grounded through the thirty-first capacitor C31, the ZCDA pin is grounded through the thirty-second resistor R32 and the twelfth inductor L12 connected in series, and the ZCDA pin is also grounded through the thirty-second capacitor C32. ;

[0062] See also Figure 7 , Figure 7 It is a structural schematic diagram of a comprehensive electromagnetic protection switching power supply provided by another embodiment of the present application.

[0063] In some embodiments, since the output of the integrated electromagnetic protection switching power supply can be a multi-channel DC regulated isolated output, in order to facilitate the control of the current and voltage in each branch and the control of the operation of each branch, such as Figure 7As shown, the integrated electromagnetic protection switching power supply 1 can also include a control and communication module 105 connected to at least one DC / DC power supply module 104, and the control and communication module 105 is used to collect data on the current and voltage output by at least one DC / DC power supply module 104, and control the on and off of the DC / DC power supply module 104.

[0064] In specific implementation, the control and communication module uploads the collected current and voltage data output from each branch, so that the user can understand the current and voltage conditions in each branch, so that the user can control the on and off of each branch through the control and communication module according to needs to meet the power supply requirements of the load in each branch.

[0065] In some embodiments, in order to reduce the emission of radiation at the source, the integrated electromagnetic protection switching power supply may further include a metal casing.

[0066] See also Figure 8 , Figure 8 It is a schematic diagram of the overall structure of a comprehensive electromagnetic protection switching power supply provided in another embodiment of the present application.

[0067] In order to enhance the shielding effect, the overall structure of the integrated electromagnetic protection switching power supply can be designed as a fully metal enclosed type, such as Figure 8 As shown, the metal shell may include a cover plate, a main shell and a connector for connecting the integrated electromagnetic protection switching power supply to the outside. The connection position 8011 between the cover plate 801 and the main shell 802 of the integrated electromagnetic protection switching power supply and the connection position 8031 ​​between the connector 803 and the main shell 802 are filled with conductive rubber material with electromagnetic shielding function to form a low-impedance connection, thereby preventing the leakage of high-frequency electromagnetic waves.

[0068] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0069] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0070] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0071] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0072] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0074] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A comprehensive electromagnetic protection switching power supply, characterized in that: include: Electromagnetic pulse protection module, EMI filtering module, AC / DC conversion module and at least one DC / DC power supply module; The electromagnetic pulse protection module is connected to the EMI filter module and is also used to access the external first alternating current; the EMI filter module is connected to the AC / DC conversion module; the AC / DC conversion module is connected to the at least one DC / DC power supply module; The electromagnetic pulse protection module is used to discharge the energy generated by the electromagnetic pulse in the first alternating current and filter out high-frequency clutter signals to obtain a second alternating current and output it to the EMI filtering module; The EMI filtering module is used to filter the high-frequency interference in the second alternating current to obtain a third alternating current and output it to the AC / DC conversion module; The AC / DC conversion module is used to convert the third alternating current into a first direct current, and output the first direct current to the at least one DC / DC power supply module; The at least one DC / DC power supply module is used to convert the first direct current into a second direct current to provide it to a load; The electromagnetic pulse protection module includes an electromagnetic pulse protection circuit, and the electromagnetic pulse protection circuit includes: a first varistor, a second varistor, a third varistor, a first inductor, a second inductor, a first capacitor and a second capacitor; The first end of the first inductor is connected to the first end of the second inductor through the first varistor, is grounded through the second varistor, and is connected to the live wire of the first alternating current, and the second end is grounded through the first capacitor; The first end of the second inductor is grounded through the third varistor and connected to the neutral line of the first direct current, and the second end is grounded through the second capacitor; The second end of the first inductor and the second end of the second inductor are connected to the EMI filtering module as output ends of the electromagnetic pulse protection module; The EMI filter module includes a resonant circuit and a low-pass filter circuit connected to the resonant circuit.

2. The integrated electromagnetic protection switching power supply according to claim 1, characterized in that: The resonant circuit includes a third inductor and a third capacitor connected in series.

3. The integrated electromagnetic protection switching power supply according to claim 1, characterized in that: The low-pass filter circuit includes a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first resistor, a fourth inductor, a fifth inductor, a sixth inductor and a seventh inductor; The first end of the fourth inductor is connected to the first end of the fifth inductor through the fourth capacitor and the first resistor connected in parallel, and is also used to be connected to the first end of the resonant circuit, and the second end of the fourth inductor is connected to the first end of the fifth capacitor through the sixth inductor; The first end of the fifth inductor is also used to be connected to the second end of the resonant circuit, and the second end is connected to the second end of the fifth capacitor through the seventh inductor; The first end of the fifth capacitor is grounded through the sixth capacitor, and the second end is grounded through the seventh capacitor. The first end and the second end of the fifth capacitor are connected to the AC / DC conversion module as output ends of the low-pass filter circuit.

4. The integrated electromagnetic protection switching power supply according to claim 1, characterized in that: The AC / DC conversion module includes an AC / DC conversion circuit and a PFC power factor correction circuit connected to each other; the AC / DC conversion circuit is used for rectification; and the PFC power factor correction circuit is used for improving the distortion of the current waveform and adjusting the phases of the current and voltage to remain consistent.

5. The integrated electromagnetic protection switching power supply according to claim 1, characterized in that: It also includes a control and communication module connected to the at least one DC / DC power supply module, and the control and communication module is used to collect data on the current and voltage output by the at least one DC / DC power supply module and control the on and off of each DC / DC power supply module.

6. The integrated electromagnetic protection switching power supply according to claim 1, characterized in that: The DC / DC power supply module includes a DC / DC circuit; The DC / DC circuit comprises: a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode and a sixth diode, an eighth inductor, a first transistor, a second transistor, a first photocoupler, a second photocoupler, a transformer and a PWM control chip; wherein the first end of the second resistor is connected to the first diode of the first inductor and the second inductor. The first direct current is connected, and the second end is grounded through the third resistor, the eighth capacitor and the first photoelectric coupler connected in parallel; the CSS pin of the PWM control chip is grounded through the ninth capacitor, the Fmax pin is grounded through the fourth resistor, the Ctimer pin is grounded through the fifth resistor and the tenth capacitor connected in parallel, the RT pin is grounded through the sixth resistor, the BO pin is connected to the second end of the second resistor, the FB pin is grounded through the twelfth capacitor and the output end of the second photoelectric coupler, the DT pin is grounded through the seventh resistor, the FF pin is grounded through the eighth resistor and the eleventh capacitor connected in parallel, and is grounded through the ninth resistor and the tenth resistor and the twelfth capacitor connected in parallel in sequence, and is connected to the first diode. The negative electrode of the second photocoupler is connected to the negative electrode of the second diode through the eleventh resistor and to the pin HB through the thirteenth capacitor. The Mupper pin is connected to the gate of the first transistor, and the HB pin is connected to the emitter of the first transistor. The Vcc pins are grounded through the fourteenth capacitor and connected to the working power supply end of the PWM control chip. The Mlower pin is connected to the gate of the second transistor, the GND pin is grounded, and the SF pin is grounded. The input end of the second photocoupler is connected to the working power supply end of the second photocoupler through the twelfth resistor. The anode of the second diode is connected to the Vcc pin. The anodes of the first diodes are connected to the Vcc pin through the fifteenth capacitors connected in parallel. The capacitor and the thirteenth resistor are grounded and connected to the cathode of the third diode; the anode of the third diode is respectively connected to the cathode of the fourth diode, and is connected to the first input terminal of the transformer through the fourteenth resistor and the sixteenth capacitor in sequence; the anode of the fourth diode is grounded; the collector of the first transistor is used to access the first direct current, and the emitter is respectively connected to the collector of the second transistor and is connected to the second input terminal of the transformer through the eighth inductor; the emitter of the second transistor is grounded; the first input terminal of the transformer is grounded through the seventeenth capacitor, the first output terminal is grounded, the second output terminal is connected to the anode of the fifth diode, and the third output terminal is connected to the anode of the sixth diode;The cathode of the sixth diode is respectively connected to the cathode of the fifth diode and grounded through the eighteenth capacitor, and is also used to output a second direct current. ; 7. The integrated electromagnetic protection switching power supply according to claim 1, characterized in that: Also includes a metal housing.

8. The integrated electromagnetic protection switching power supply according to claim 7, characterized in that: The metal shell includes a cover plate, a main shell and a connector for connecting the integrated electromagnetic protection switching power supply to the outside; wherein the connection position between the cover plate and the main shell and the connection position between the main shell and the connector are filled with conductive rubber material with electromagnetic shielding function.

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