CN108173423B - Diode discharge circuit for chassis power supply - Google Patents
Diode discharge circuit for chassis power supply Download PDFInfo
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- CN108173423B CN108173423B CN201810123678.7A CN201810123678A CN108173423B CN 108173423 B CN108173423 B CN 108173423B CN 201810123678 A CN201810123678 A CN 201810123678A CN 108173423 B CN108173423 B CN 108173423B
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- 239000003990 capacitor Substances 0.000 claims abstract description 165
- 238000001914 filtration Methods 0.000 claims abstract description 52
- 238000007599 discharging Methods 0.000 claims abstract description 25
- 238000004804 winding Methods 0.000 claims description 42
- 238000004146 energy storage Methods 0.000 claims description 20
- FIZZUEJIOKEFFZ-UHFFFAOYSA-M C3-oxacyanine Chemical compound [I-].O1C2=CC=CC=C2[N+](CC)=C1C=CC=C1N(CC)C2=CC=CC=C2O1 FIZZUEJIOKEFFZ-UHFFFAOYSA-M 0.000 claims description 9
- 101100439276 Candida albicans (strain SC5314 / ATCC MYA-2876) CLB2 gene Proteins 0.000 claims description 9
- 101100439277 Candida albicans CYB1 gene Proteins 0.000 claims description 9
- 101100276209 Rhizobium meliloti (strain 1021) cya1 gene Proteins 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a diode discharging circuit for a chassis power supply, wherein a diode D1 and a diode D2 are respectively coupled to a safety capacitor CX2, and the diode D1 and the diode D2 are coupled together to one end of a series resistance unit; the series resistance unit is coupled with the control chip IC2; the control chip IC2 is connected with the first pin 4 of the second light receiver IC4A1, the first pin of the second light receiver IC4A1 is connected with the COMP pin of the control chip IC2, the control chip IC2 is connected with the primary side of the standby power transformer, and the secondary side of the standby power transformer is connected with the standby power rectifying and filtering output circuit; the first light emitter IC4A2 is connected to the secondary side of the standby power transformer; therefore, the control chip IC2 which meets the standby power supply control circuit outputs +5V standby voltage by supplying the larger residual electric charge quantity of the safety capacitor CX11 and the safety capacitor CX12 when the power is turned off, a discharging circuit in the traditional technology is omitted, the residual electric charge is utilized, the cost is saved, the environment is protected, and the economic value and the social value are obvious.
Description
Technical Field
The invention relates to the technical field of discharge circuits, in particular to a diode discharge circuit for a chassis power supply.
Background
The existing discharging circuit is shown in fig. 1, and has a second discharging unit, where the second discharging unit includes a resistor R1, a capacitor C1, a discharging chip IC1 and a resistor R2, and when the circuit is turned off, charges remaining in the safety capacitor CX2 and the safety capacitor CX3 are discharged through the discharging chip IC1, and the second discharging unit is set, so that the cost is high, and the second discharging unit does not have economic value and social value.
Accordingly, in the present application, the applicant has carefully studied a diode discharge circuit for a cabinet power supply to solve the above-mentioned problems.
Disclosure of Invention
In view of the above, the present invention aims at overcoming the drawbacks of the prior art, and its main objective is to provide a diode discharge circuit for a power supply of a chassis, which supplies a larger amount of charge remaining when the safety capacitor CX11 and the safety capacitor CX12 are turned off to the control chip IC2 satisfying the standby power control circuit to output a +5v standby voltage, thereby omitting the discharge circuit in the conventional art, and also utilizing the remaining charge, saving the cost and protecting the environment, and having significant economic and social values.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a diode discharging circuit for a chassis power supply comprises a switch SW1, a standby power supply control circuit, a diode D1, a diode D2, an optocoupler feedback circuit, a standby power supply transformer, an electromagnetic interference filter for connecting alternating current and a rectifying filter for converting alternating current input voltage into direct current output voltage;
the electromagnetic interference filter comprises a safety capacitor CX2, a safety capacitor CX3 and a common mode inductor LF2, wherein the safety capacitor CX2 is coupled between a live wire L and a zero line N of alternating current, one end of a first winding group of the common mode inductor LF2 is coupled with one end of a second winding group of the common mode inductor LF2 through the capacitor CX2, and one end of the first winding group of the common mode inductor LF2 is also coupled with the live wire L of the alternating current through a switch SW 1; the other end of the first winding set of the common-mode inductor LF2 is coupled to the other end of the second winding set of the common-mode inductor LF2 through a capacitor CX 3; the rectifying filter has a first end, a second end, a third end and a fourth end, the fourth end is coupled to the other end of the first winding set of the common-mode inductor LF2, the second end is coupled to the other end of the second winding set of the common-mode inductor LF2, and the third end and the fourth end are respectively coupled to two ends of the safety capacitor CX 3;
the positive electrode of the diode D1 and the positive electrode of the diode D2 are respectively coupled to two ends of the safety capacitor CX2, and the negative electrode of the diode D1 and the negative electrode of the diode D2 are coupled together to one end of the series resistance unit;
the standby power supply control circuit comprises a control chip IC2, and the other end of the series resistance unit is coupled with the control chip IC2; the optocoupler feedback circuit comprises an optocoupler, the optocoupler comprises a first light emitter IC4A2 and a second light receiver IC4A1 which are matched, a COMP pin of the control chip IC2 is connected with a first pin 4 of the second light receiver IC4A1, a first pin 3 of the second light receiver IC4A1 is grounded, a first pin 3 of the second light receiver IC4A1 is connected with a COMP pin of the control chip IC2 through a resistor R16, the control chip IC2 is connected with a primary side of a standby power transformer, and a secondary side of the standby power transformer is connected with a standby power rectifying and filtering output circuit; the first light emitter IC4A2 is connected to the secondary side of the standby power transformer;
when the power-off is performed, the charges remained in the safety capacitor CX2 and the safety capacitor CX3 are rectified to the control chip IC2 through the diode D1 and the diode D2, and after the secondary side of the standby power transformer is matched with the first light emitter IC4A2 and the second light receiver IC4A1, the second light receiver IC4A1 feeds back input current to the COMP pin of the control chip IC2; the control chip IC2 outputs voltage to the primary side of the standby power transformer, and the standby power rectifying and filtering output circuit controls and outputs +5V standby voltage through the voltage output by the secondary side of the standby power transformer.
As a preferred solution, the standby power control circuit further includes a resistor R22, a resistor R14, a resistor R1, a resistor R34, a capacitor C2, a capacitor C4, a resistor R39, a resistor R24, a first switching tube, a capacitor C5, a polarity capacitor C11, a zener diode D6, a diode D2, a diode D7, and a diode D4; the control chip IC1 is provided with a control pin 1 to a control pin 8, the control pin 1 is grounded through a resistor R22, the COMP pin is a control pin 2, and the control pin 2 is grounded through a capacitor C4; the control pin 3 is a CS pin, the control pin 3 is simultaneously connected with one end of the capacitor C2 and one end of the resistor R14, and the other end of the capacitor C2 is grounded; the control pin 4 is grounded; the control pin 5 is a G pin, the control pin 5 is connected with one end of a resistor R39, the other end of the resistor R39 is simultaneously connected with one end of a resistor R34 and the control end of a switching tube, the other end of the resistor R34 is simultaneously connected with the other end of a resistor R14 and one end of a resistor R1, the other end of the resistor R1 is grounded, the output end of a first switching tube is connected with one end of the resistor R1, the input end of the first switching tube is connected with the positive electrode of a diode D7, the negative electrode of the diode D7 is connected with the negative electrode of a voltage-stabilizing diode D6, and the positive electrode of the voltage-stabilizing diode D6 outputs direct-current voltage VDC; the control pin 6 is a VCC pin, the control pin 6 is connected with the cathode of the diode D2, and the anode of the diode D2 is connected with the primary side of the standby power transformer through the resistor R24; the control pin 8 is an HV pin, and the control pin 8 is connected to the other end of the series resistance unit.
As a preferred solution, the standby power transformer has a standby power transformer pin 2, a standby power transformer pin 4, a standby power transformer pin 5, and a standby power transformer pin 6, wherein the standby power transformer pin 2 is connected to the anode of the zener diode D6, the standby power transformer pin 4 is connected to the anode of the diode D7, the standby power transformer pin 5 is connected to the resistor R24, and the standby power transformer pin 6 is grounded.
As a preferable scheme, the standby power supply rectifying and filtering output circuit comprises a first rectifying module and a first capacitance and inductance filtering module, wherein the standby power supply transformer is connected with the first rectifying module, the first rectifying module is connected with the first capacitance and inductance filtering module, the first rectifying module receives and outputs an output signal of the standby power supply transformer after processing, and the first capacitance and inductance filtering module receives and outputs +5V standby voltage after processing an output signal of the first rectifying module.
As a preferable scheme, the first capacitive inductance filter module is connected with a first voltage controller, and the first voltage controller is connected with a standby power supply control circuit.
As a preferred scheme, the electromagnetic interference filter further comprises a safety capacitor CYA1, a safety capacitor CYB1, a safety capacitor CX1, a first discharging unit, a common mode inductor LF1, a safety capacitor CY1 and a safety capacitor CY2, wherein the safety capacitor CX1 is coupled between a live wire L and a zero wire N of the alternating current, one end of the safety capacitor CYA1 is used for connecting the live wire L of the alternating current, one end of the safety capacitor CYB1 is used for connecting the zero wire N of the alternating current, and the other end of the safety capacitor CYA1 and the other end of the safety capacitor CYB1 are commonly connected with a ground wire E of the alternating current and grounded;
the first discharging unit comprises a resistor R18, a resistor R19, a capacitor C8 and a discharging chip IC12, wherein the discharging chip IC12 is connected in parallel with two ends of the capacitor C8, one end of a safety capacitor CX1 is coupled with one end of the resistor R18, the other end of the resistor R18 is connected with one end of the capacitor C8, the other end of the capacitor C8 is connected with one end of the resistor R19, and the other end of the resistor R19 is coupled with the other end of the safety capacitor CX 1; one end of the first winding group of the common-mode inductor LF1 is coupled with one end of the second winding group of the common-mode inductor LF1 through a safety capacitor CX1, the other end of the first winding group of the common-mode inductor LF1 is coupled with the other end of the second winding group of the common-mode inductor LF1 through a safety capacitor CX2, one end of the safety capacitor CY1 is coupled with the other end of the first winding group of the common-mode inductor LF1, one end of the safety capacitor CY2 is coupled with the other end of the second winding group of the common-mode inductor LF1, and the other end of the safety capacitor CY1 is coupled with the other end of the safety capacitor CY2 and grounded.
As a preferable scheme, one end of the first winding group of the common-mode inductor LF1 is connected with a fuse F4, and the fuse F4 is connected with a live wire in the alternating current through a switch SW 1.
As a preferable scheme, the two ends of the safety capacitor CX3 are connected in parallel with the piezoresistor VD4.
As a preferred embodiment, the rectifying filter includes a bridge rectifier and a filter; the bridge rectifier comprises a diode DB1, a diode DB2, a diode DB3 and a diode DB4, wherein the anode end and the cathode end of the diode DB1 are respectively coupled to the fourth end and the first end of the rectifying filter, the anode end and the cathode end of the diode DB2 are respectively coupled to the second end and the third end of the rectifying filter, the anode end and the cathode end of the diode DB3 are respectively coupled to the third end and the first end of the rectifying filter, and the anode end and the cathode end of the diode DB4 are respectively coupled to the second end and the fourth end of the rectifying filter; the filter comprises a filter capacitor C23, and two ends of the filter capacitor C23 are connected between the second end and the first end of the rectifying filter in a bridging mode.
As a preferable scheme, a first end of the rectifying filter is connected with a conversion circuit, and the conversion circuit comprises a PFC inductor, a PFC-PWN controller, a high-voltage diode rectifying module, a high-voltage capacitor filtering module, a main power transformer, a second capacitor inductor filtering module, a second rectifying module, an energy storage inductor module, a first DC-DC converter, a second DC-DC converter, a third capacitor inductor filtering module, a second voltage controller, a protection IC module and a VCC power supply control module; the first end of the rectifying filter is connected with the PFC inductor, the PFC inductor is connected with the high-voltage diode rectifying module, the high-voltage diode rectifying module is connected with the high-voltage capacitor filtering module, the high-voltage capacitor filtering module is respectively connected with the main power transformer and the standby power transformer, the main power transformer is connected with the second rectifying module, the second rectifying module is connected with the energy storage inductor module, the energy storage inductor module is respectively connected with the second capacitor inductor filtering module, the first DC-DC converter, the second DC-DC converter and the third capacitor inductor filtering module, the second capacitor inductor filtering module receives the voltage of +12V after the output signal of the energy storage inductor module is processed, the first DC-DC converter receives the voltage of +5V after the output signal of the energy storage inductor module is processed, the second DC-DC converter receives the voltage of +3V after the output signal of the energy storage inductor module is processed, and the third capacitor inductor filtering module receives the voltage of-12V after the output signal of the energy storage inductor module is processed;
the second capacitor inductance filtering module, the first DC-DC converter, the second DC-DC converter and the first capacitor inductance filtering module are all connected with the protection IC module, the protection IC module and the standby power supply control circuit are all connected with the VCC power supply control module, the protection IC module receives the PG signal and the PS-ON signal which are output after the output signal from the first capacitor inductance filtering module is processed, the VCC power supply control module is connected with the PFC-PWN controller, the second DC-DC converter is connected with the PFC-PWN controller through the second voltage controller, and the PFC-PWN controller is respectively connected with the high-voltage diode rectifying module and the main power supply transformer.
Compared with the prior art, the invention has obvious advantages and beneficial effects, in particular, the technical scheme shows that the diode D1, the diode D2 and the standby power supply control circuit supply the larger electric charge quantity remained when the safety capacitor CX11 and the safety capacitor CX12 are shut down to the control chip IC2 which meets the standby power supply control circuit to output +5V standby voltage, thereby omitting a discharge circuit in the prior art, utilizing the residual electric charge, saving the cost and protecting the environment, and having remarkable economic and social values.
In order to more clearly illustrate the structural features and efficacy of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic diagram of a prior art discharge circuit;
FIG. 2 is a general connection block diagram of an embodiment of the present invention;
FIG. 3 is a discharge schematic of an embodiment of the present invention;
FIG. 4 is a block diagram showing the connection structure between the inside of the switching circuit and the rectifying filter, the standby power transformer, the standby power control circuit, and the standby power rectifying filter output circuit according to the embodiment of the present invention.
The attached drawings are used for identifying and describing:
10. standby power control circuit 20 and optocoupler feedback circuit
30. Standby power transformer 40 and electromagnetic interference filter
50. Rectifying filter 60, alternating current
70. And a conversion circuit.
Detailed Description
Referring to fig. 2 to 4, a specific structure of a preferred embodiment of the present invention is shown, which is a diode discharging circuit for a chassis power supply, and the diode discharging circuit comprises a switch SW1, a standby power control circuit 10, a diode D1, a diode D2, an optocoupler feedback circuit 20, a standby power transformer 30, an electromagnetic interference filter 40 for connecting an alternating current 60, and a rectifying filter 50 for converting an alternating current input voltage into a direct current output voltage, wherein:
the electromagnetic interference filter 40 comprises a safety capacitor CX2, a safety capacitor CX3 and a common-mode inductor LF2, wherein the safety capacitor CX2 is coupled between the live line L and the neutral line N of the ac 60, one end of the first winding group of the common-mode inductor LF2 is coupled to one end of the second winding group of the common-mode inductor LF2 via the capacitor CX2, one end of the first winding group of the common-mode inductor LF1 is connected with a fuse F4, and the fuse F4 is connected to the live line of the ac 60 via a switch SW 1; the two ends of the safety capacitor CX3 are connected with piezoresistors VD4 in parallel; one end of the first winding set of the common-mode inductor LF2 is further coupled to the live line L of the ac 60 through the switch SW 1; the other end of the first winding set of the common-mode inductor LF2 is coupled to the other end of the second winding set of the common-mode inductor LF2 through a capacitor CX 3;
the rectifying filter 50 has a first end, a second end, a third end and a fourth end, the fourth end is coupled to the other end of the first winding set of the common-mode inductor LF2, the second end is coupled to the other end of the second winding set of the common-mode inductor LF2, and the third end and the fourth end are respectively coupled to two ends of the safety capacitor CX 3; in this embodiment, the rectifying filter 50 includes a bridge rectifier and a filter;
the bridge rectifier includes a diode DB1, a diode DB2, a diode DB3, and a diode DB4, wherein an anode terminal and a cathode terminal of the diode DB1 are coupled to the fourth terminal and the first terminal of the rectifying filter 50, respectively, an anode terminal and a cathode terminal of the diode DB2 are coupled to the second terminal and the third terminal of the rectifying filter 50, respectively, an anode terminal and a cathode terminal of the diode DB3 are coupled to the third terminal and the first terminal of the rectifying filter 50, respectively, and an anode terminal and a cathode terminal of the diode DB4 are coupled to the second terminal and the fourth terminal of the rectifying filter 50, respectively; the filter includes a filter capacitor C23, and two ends of the filter capacitor C23 are connected across the second end and the first end of the rectifying filter 50.
A first end of the rectifying filter 50 is connected to a converting circuit 70, and the converting circuit 70 includes a PFC inductor, a PFC-PWN controller, a high voltage diode rectifying module, a high voltage capacitor filtering module, a main power transformer, a second capacitor inductor filtering module, a second rectifying module, an energy storage inductor module, a first DC-DC converter, a second DC-DC converter, a third capacitor inductor filtering module, a second voltage controller, a protection IC module, and a VCC power supply control module; the first end of the rectifying filter 50 is connected with a PFC inductor, the PFC inductor is connected with a high-voltage diode rectifying module, the high-voltage diode rectifying module is connected with a high-voltage capacitor filtering module, the high-voltage capacitor filtering module is respectively connected with a main power transformer and a standby power transformer 30, the main power transformer is connected with a second rectifying module, the second rectifying module is connected with an energy storage inductor module, the energy storage inductor module is respectively connected with a second capacitor inductor filtering module, a first DC-DC converter, a second DC-DC converter and a third capacitor inductor filtering module, the second capacitor inductor filtering module receives the output signal of the energy storage inductor module and outputs +12v voltage after processing, the first DC-DC converter receives the output signal of the energy storage inductor module and outputs +3v voltage after processing, and the third capacitor inductor filtering module receives the output signal of the energy storage inductor module and outputs-12v voltage after processing;
the second capacitive inductance filter module, the first DC-DC converter, the second DC-DC converter and the first capacitive inductance filter module are all connected with the protection IC module, the protection IC module and the standby power supply control circuit 10 are all connected with the VCC power supply control module, the protection IC module receives the PG signal and the PS-ON signal after processing the output signal from the first capacitive inductance filter module, the VCC power supply control module is connected with the PFC-PWN controller, the second DC-DC converter is connected with the PFC-PWN controller through the second voltage controller, and the PFC-PWN controller is respectively connected with the high-voltage diode rectifying module and the main power supply transformer.
The positive electrode of the diode D1 and the positive electrode of the diode D2 are respectively coupled to two ends of the safety capacitor CX2, and the negative electrode of the diode D1 and the negative electrode of the diode D2 are coupled together to one end of the series resistance unit; the series resistance unit comprises a resistor R21, a resistor R25 and a resistor R27, wherein the cathode of the diode D1 and the cathode of the diode D2 are coupled together to one end of the series resistor R27, the other end of the resistor R27 is connected with the resistor R25 in series, and the resistor R25 is connected with one end of the resistor R21.
The standby power supply control circuit 10 comprises a control chip IC2, and the other end of the series resistance unit is coupled with the control chip IC2; the optocoupler feedback circuit 20 comprises an optocoupler, the optocoupler comprises a first light emitter IC4A2 and a second light receiver IC4A1 which are matched, a COMP pin of the control chip IC2 is connected with a first pin 4 of the second light receiver IC4A1, a first pin 3 of the second light receiver IC4A1 is grounded, a first pin 3 of the second light receiver IC4A1 is connected with a COMP pin of the control chip IC2 through a resistor R16, the control chip IC2 is connected with a primary side of the standby power transformer 30, and a secondary side of the standby power transformer 30 is connected with a standby power rectifying and filtering output circuit; the first light emitter IC4A2 is connected to the secondary side of the standby power transformer 30;
when the power-off is performed, the charges remained in the safety capacitor CX2 and the safety capacitor CX3 are rectified to the control chip IC2 through the diode D1 and the diode D2, and as the secondary side of the standby power transformer 30 is matched with the first light emitter IC4A2 and the second light receiver IC4A1, the second light receiver IC4A1 feeds back input current to the COMP pin of the control chip IC2; the control chip IC2 outputs a voltage to the primary side of the standby power transformer 30, and the standby power rectifying and filtering output circuit controls the output of +5v standby voltage through the voltage output by the secondary side of the standby power transformer 30.
The standby power control circuit 10 further includes a resistor R22, a resistor R14, a resistor R1, a resistor R34, a capacitor C2, a capacitor C4, a resistor R39, a resistor R24, a first switching tube, a capacitor C5, a polarity capacitor C11, a zener diode D6, a diode D2, a diode D7, and a diode D4; the control chip IC1 is provided with a control pin 1 to a control pin 8, the control pin 1 is grounded through a resistor R22, the COMP pin is a control pin 2, and the control pin 2 is grounded through a capacitor C4; the control pin 3 is a CS pin, the control pin 3 is simultaneously connected with one end of the capacitor C2 and one end of the resistor R14, and the other end of the capacitor C2 is grounded; the control pin 4 is grounded; the control pin 5 is a G pin, the control pin 5 is connected with one end of a resistor R39, the other end of the resistor R39 is simultaneously connected with one end of a resistor R34 and the control end of a switching tube, the other end of the resistor R34 is simultaneously connected with the other end of a resistor R14 and one end of a resistor R1, the other end of the resistor R1 is grounded, the output end of a first switching tube is connected with one end of the resistor R1, and the input end of the first switching tube is connected with the anode of a diode D7; in this embodiment, the first switching tube is an N-type MOS tube Q29, the cathode of the diode D7 is connected to the cathode of the zener diode D6, and the anode of the zener diode D6 outputs the dc voltage VDC; the control pin 6 is a VCC pin, the control pin 6 is connected with the cathode of the diode D2, and the anode of the diode D2 is connected with the primary side of the standby power transformer 30 through the resistor R24; the control pin 8 is an HV pin, and the control pin 8 is connected to the other end of the series resistor unit, and in this embodiment, the control pin 8 is connected to the other end of the resistor R21.
The standby power transformer 30 is provided with a standby power transformer 30 pin 2, a standby power transformer 30 pin 4, a standby power transformer 30 pin 5 and a standby power transformer 30 pin 6, wherein the standby power transformer 30 pin 2 is connected with the positive electrode of the zener diode D6, the standby power transformer 30 pin 4 is connected with the positive electrode of the diode D7, the standby power transformer 30 pin 5 is connected with the resistor R24, and the standby power transformer 30 pin 6 is grounded.
The standby power supply rectifying and filtering output circuit comprises a first rectifying module and a first capacitance-inductance filtering module, the standby power supply transformer 30 is connected with the first rectifying module, the first rectifying module is connected with the first capacitance-inductance filtering module, the first rectifying module receives and outputs an output signal of the standby power supply transformer 30 after processing, and the first capacitance-inductance filtering module receives and outputs +5V standby voltage after processing the output signal of the first rectifying module; the first capacitive inductance filter module is connected with a first voltage controller, and the first voltage controller is connected with the standby power supply control circuit 10.
The electromagnetic interference filter 40 further comprises a safety capacitor CYA1, a safety capacitor CYB1, a safety capacitor CX1, a first discharging unit, a common mode inductor LF1, a safety capacitor CY1 and a safety capacitor CY2, wherein the safety capacitor CX1 is coupled between the live wire L and the zero wire N of the alternating current 60, one end of the safety capacitor CYA1 is used for connecting the live wire L in the alternating current 60, one end of the safety capacitor CYB1 is used for connecting the zero wire N in the alternating current 60, and the other end of the safety capacitor CYA1 and the other end of the safety capacitor CYB1 are commonly connected with the ground wire E in the alternating current 60 and grounded;
the first discharging unit comprises a resistor R18, a resistor R19, a capacitor C8 and a discharging chip IC12, wherein the discharging chip IC12 is connected in parallel with two ends of the capacitor C8, one end of a safety capacitor CX1 is coupled with one end of the resistor R18, the other end of the resistor R18 is connected with one end of the capacitor C8, the other end of the capacitor C8 is connected with one end of the resistor R19, and the other end of the resistor R19 is coupled with the other end of the safety capacitor CX 1; one end of the first winding group of the common-mode inductor LF1 is coupled with one end of the second winding group of the common-mode inductor LF1 through a safety capacitor CX1, the other end of the first winding group of the common-mode inductor LF1 is coupled with the other end of the second winding group of the common-mode inductor LF1 through a safety capacitor CX2, one end of the safety capacitor CY1 is coupled with the other end of the first winding group of the common-mode inductor LF1, one end of the safety capacitor CY2 is coupled with the other end of the second winding group of the common-mode inductor LF1, and the other end of the safety capacitor CY1 is coupled with the other end of the safety capacitor CY2 and grounded.
In summary, the design of the present invention focuses on that the diode D1, the diode D2 and the standby power control circuit supply the larger charge amount remained when the safety capacitor CX11 and the safety capacitor CX12 are turned off to the control chip IC2 satisfying the standby power control circuit to output the standby voltage of +5v, thereby omitting the discharging circuit in the conventional technology, utilizing the residual charge, saving the cost, protecting the environment, and having significant economic and social values.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention are still within the scope of the technical solutions of the present invention.
Claims (8)
1. A diode discharge circuit for a chassis power supply, comprising: the power supply comprises a switch SW1, a standby power supply control circuit, a diode D1, a diode D2, an optocoupler feedback circuit, a standby power supply transformer, an electromagnetic interference filter used for being connected with alternating current and a rectifying filter used for converting alternating current input voltage into direct current output voltage;
the electromagnetic interference filter comprises a safety capacitor CX2, a safety capacitor CX3 and a common mode inductor LF2, wherein the safety capacitor CX2 is coupled between a live wire L and a zero line N of alternating current, one end of a first winding group of the common mode inductor LF2 is coupled with one end of a second winding group of the common mode inductor LF2 through the capacitor CX2, and one end of the first winding group of the common mode inductor LF2 is also coupled with the live wire L of the alternating current through a switch SW 1; the other end of the first winding set of the common-mode inductor LF2 is coupled to the other end of the second winding set of the common-mode inductor LF2 through a capacitor CX 3; the rectifying filter has a first end, a second end, a third end and a fourth end, the fourth end is coupled to the other end of the first winding set of the common-mode inductor LF2, the second end is coupled to the other end of the second winding set of the common-mode inductor LF2, and the third end and the fourth end are respectively coupled to two ends of the safety capacitor CX 3;
the positive electrode of the diode D1 and the positive electrode of the diode D2 are respectively coupled to two ends of the safety capacitor CX2, and the negative electrode of the diode D1 and the negative electrode of the diode D2 are coupled together to one end of the series resistance unit;
the standby power supply control circuit comprises a control chip IC2, and the other end of the series resistance unit is coupled with the control chip IC2; the optocoupler feedback circuit comprises an optocoupler, the optocoupler comprises a first light emitter IC4A2 and a second light receiver IC4A1 which are matched, a COMP pin of the control chip IC2 is connected with a first pin 4 of the second light receiver IC4A1, a first pin 3 of the second light receiver IC4A1 is grounded, a first pin 3 of the second light receiver IC4A1 is connected with a COMP pin of the control chip IC2 through a resistor R16, the control chip IC2 is connected with a primary side of a standby power transformer, and a secondary side of the standby power transformer is connected with a standby power rectifying and filtering output circuit; the first light emitter IC4A2 is connected to the secondary side of the standby power transformer;
when the power-off is performed, the charges remained in the safety capacitor CX2 and the safety capacitor CX3 are rectified to the control chip IC2 through the diode D1 and the diode D2, and after the secondary side of the standby power transformer is matched with the first light emitter IC4A2 and the second light receiver IC4A1, the second light receiver IC4A1 feeds back input current to the COMP pin of the control chip IC2; the control chip IC2 outputs voltage to the primary side of the standby power transformer, and the standby power rectifying and filtering output circuit controls and outputs +5V standby voltage through the voltage output by the secondary side of the standby power transformer;
one end of the first winding group of the common mode inductor LF1 is connected with a fuse F4, and the fuse F4 is connected with a live wire in alternating current through a switch SW 1;
and the two ends of the safety capacitor CX3 are connected with piezoresistors VD4 in parallel.
2. The diode discharge circuit for a chassis power supply of claim 1, wherein: the standby power supply control circuit further comprises a resistor R22, a resistor R14, a resistor R1, a resistor R34, a capacitor C2, a capacitor C4, a resistor R39, a resistor R24, a first switching tube, a capacitor C5, a polarity capacitor C11, a voltage stabilizing diode D6, a diode D2, a diode D7 and a diode D4; the control chip IC1 is provided with a control pin 1 to a control pin 8, the control pin 1 is grounded through a resistor R22, the COMP pin is a control pin 2, and the control pin 2 is grounded through a capacitor C4; the control pin 3 is a CS pin, the control pin 3 is simultaneously connected with one end of the capacitor C2 and one end of the resistor R14, and the other end of the capacitor C2 is grounded; the control pin 4 is grounded; the control of
The pin 5 is a G pin, the control pin 5 is connected with one end of a resistor R39, the other end of the resistor R39 is simultaneously connected with one end of a resistor R34 and the control end of a switch tube, the other end of the resistor R34 is simultaneously connected with the other end of a resistor R14 and one end of a resistor R1, the other end of the resistor R1 is grounded, the output end of a first switch tube is connected with one end of the resistor R1, the input end of the first switch tube is connected with the positive electrode of a diode D7, the negative electrode of the diode D7 is connected with the negative electrode of a voltage-stabilizing diode D6, and the positive electrode of the voltage-stabilizing diode D6 outputs direct-current voltage VDC; the control pin 6 is a VCC pin, the control pin 6 is connected with the cathode of the diode D2, and the anode of the diode D2 is connected with the primary side of the standby power transformer through the resistor R24; the control pin 8 is an HV pin, and the control pin 8 is connected to the other end of the series resistance unit.
3. The diode discharge circuit for a chassis power supply of claim 2, wherein: the standby power transformer is provided with a standby power transformer pin 2, a standby power transformer pin 4, a standby power transformer pin 5 and a standby power transformer pin 6, wherein the standby power transformer pin 2 is connected with the anode of the zener diode D6, the standby power transformer pin 4 is connected with the anode of the diode D7, the standby power transformer pin 5 is connected with the resistor R24, and the standby power transformer pin 6 is grounded.
4. The diode discharge circuit for a chassis power supply of claim 2, wherein: the standby power supply rectifying and filtering output circuit comprises a first rectifying module and a first capacitance-inductance filtering module, the standby power supply transformer is connected with the first rectifying module, the first rectifying module is connected with the first capacitance-inductance filtering module, the first rectifying module receives and outputs an output signal of the standby power supply transformer after processing, and the first capacitance-inductance filtering module receives and outputs +5V standby voltage after processing an output signal of the first rectifying module.
5. The diode discharge circuit for a chassis power supply of claim 4, wherein: the first capacitive inductance filter module is connected with a first voltage controller, and the first voltage controller is connected with a standby power supply control circuit.
6. The diode discharge circuit for a chassis power supply of claim 1, wherein: the electromagnetic interference filter further comprises a safety capacitor CYA1, a safety capacitor CYB1, a safety capacitor CX1, a first discharging unit, a common mode inductor LF1, a safety capacitor CY1 and a safety capacitor CY2, wherein the safety capacitor CX1 is coupled between a live wire L and a null wire N of alternating current, one end of the safety capacitor CYA1 is used for being connected with the neutral wire L of the alternating current, one end of the safety capacitor CYB1 is used for being connected with the null wire N of the alternating current, and the other end of the safety capacitor CYA1 and the other end of the safety capacitor CYB1 are commonly connected with a ground wire E of the alternating current and grounded;
the first discharging unit comprises a resistor R18, a resistor R19, a capacitor C8 and a discharging chip IC12, wherein the discharging chip IC12 is connected in parallel with two ends of the capacitor C8, one end of a safety capacitor CX1 is coupled with one end of the resistor R18, the other end of the resistor R18 is connected with one end of the capacitor C8, the other end of the capacitor C8 is connected with one end of the resistor R19, and the other end of the resistor R19 is coupled with the other end of the safety capacitor CX 1; one end of the first winding group of the common-mode inductor LF1 is coupled with one end of the second winding group of the common-mode inductor LF1 through a safety capacitor CX1, the other end of the first winding group of the common-mode inductor LF1 is coupled with the other end of the second winding group of the common-mode inductor LF1 through a safety capacitor CX2, one end of the safety capacitor CY1 is coupled with the other end of the first winding group of the common-mode inductor LF1, one end of the safety capacitor CY2 is coupled with the other end of the second winding group of the common-mode inductor LF1, and the other end of the safety capacitor CY1 is coupled with the other end of the safety capacitor CY2 and grounded.
7. The diode discharge circuit for a chassis power supply of claim 1, wherein: the rectifying filter comprises a bridge rectifier and a filter; the bridge rectifier comprises a diode DB1, a diode DB2, a diode DB3 and a diode DB4, wherein the anode end and the cathode end of the diode DB1 are respectively coupled to the fourth end and the first end of the rectifying filter, the anode end and the cathode end of the diode DB2 are respectively coupled to the second end and the third end of the rectifying filter, and the anode of the diode DB3
The anode terminal and the cathode terminal of the diode DB4 are respectively coupled to the second terminal and the fourth terminal of the rectifying filter; the filter comprises a filter capacitor C23, and two ends of the filter capacitor C23 are connected between the second end and the first end of the rectifying filter in a bridging mode.
8. The diode discharge circuit for a chassis power supply of claim 1, wherein: the first end of the rectifying filter is connected with a conversion circuit, and the conversion circuit comprises a PFC inductor, a PFC-PWN controller, a high-voltage diode rectifying module, a high-voltage power filtering module, a main power transformer, a second capacitance inductance filtering module, a second rectifying module, an energy storage inductance module, a first DC-DC converter, a second DC-DC converter, a third capacitance inductance filtering module, a second voltage controller, a protection IC module and a VCC power control module; the first end of the rectifying filter is connected with the PFC inductor, the PFC inductor is connected with the high-voltage diode rectifying module, the high-voltage diode rectifying module is connected with the high-voltage capacitor filtering module, the high-voltage capacitor filtering module is respectively connected with the main power transformer and the standby power transformer, the main power transformer is connected with the second rectifying module, the second rectifying module is connected with the energy storage inductor module, the energy storage inductor module is respectively connected with the second capacitor inductor filtering module, the first DC-DC converter, the second DC-DC converter and the third capacitor inductor filtering module, the second capacitor inductor filtering module receives the voltage of +12V after the output signal of the energy storage inductor module is processed, the first DC-DC converter receives the voltage of +5V after the output signal of the energy storage inductor module is processed, the second DC-DC converter receives the voltage of +3V after the output signal of the energy storage inductor module is processed, and the third capacitor inductor filtering module receives the voltage of-12V after the output signal of the energy storage inductor module is processed;
the second capacitor inductance filtering module, the first DC-DC converter, the second DC-DC converter and the first capacitor inductance filtering module are all connected with the protection IC module, the protection IC module and the standby power supply control circuit are all connected with the VCC power supply control module, the protection IC module receives the PG signal and the PS-ON signal which are output after the output signal from the first capacitor inductance filtering module is processed, the VCC power supply control module is connected with the PFC-PWN controller, the second DC-DC converter is connected with the PFC-PWN controller through the second voltage controller, and the PFC-PWN controller is respectively connected with the high-voltage diode rectifying module and the main power supply transformer.
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| CN201810123678.7A CN108173423B (en) | 2018-02-07 | 2018-02-07 | Diode discharge circuit for chassis power supply |
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| CN201810123678.7A CN108173423B (en) | 2018-02-07 | 2018-02-07 | Diode discharge circuit for chassis power supply |
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| CN108173423B true CN108173423B (en) | 2023-11-24 |
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| CN110636234B (en) * | 2018-06-22 | 2021-05-04 | 冯子祥 | Audio-visual power processor and audio-visual playing system |
| CN109819572A (en) * | 2019-03-29 | 2019-05-28 | 珠海西格医疗设备有限公司 | The Quick discharger of dentistry high-frequency X-ray |
| CN111258257A (en) * | 2020-03-30 | 2020-06-09 | 宁波亿盛电机有限公司 | Controller for food waste disposer |
| CN113395807B (en) * | 2021-06-01 | 2022-11-29 | 广东科谷智能科技有限公司 | Dimming circuit, PCB and dimming power supply |
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| EP1301781A2 (en) * | 2000-07-12 | 2003-04-16 | Innovative Met Products (Pty) Limited | Method and apparatus for the assay of precious metals |
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| AU2001272037A1 (en) * | 2000-07-12 | 2002-04-18 | Flsmidth A/S | Method and apparatus for the assay of precious metals |
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