CN106972743B - Capacitor discharge circuit, and module power supply and redundancy system with same - Google Patents
Capacitor discharge circuit, and module power supply and redundancy system with same Download PDFInfo
- Publication number
- CN106972743B CN106972743B CN201710301450.8A CN201710301450A CN106972743B CN 106972743 B CN106972743 B CN 106972743B CN 201710301450 A CN201710301450 A CN 201710301450A CN 106972743 B CN106972743 B CN 106972743B
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- resistor
- power supply
- module power
- bus interface
- interface board
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- 239000003990 capacitor Substances 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 238000000605 extraction Methods 0.000 claims abstract description 5
- 206010014357 Electric shock Diseases 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
Capacitor discharge circuit and module power supply and redundant system with the same. The embodiment of the invention discloses a capacitor discharge circuit which is used in a module power supply, wherein the module power supply is used for being connected to a bus interface board in a pluggable manner, and the capacitor discharge circuit comprises a pull-out detection unit, a switch unit and a discharge unit which are connected in sequence; the extraction detection unit is used for detecting whether the module power supply is extracted from the bus interface board or not so as to control the on-off of the switch unit; when the module power supply is pulled out, the switch unit is turned on, and the discharge unit discharges; when the module power supply is not pulled out, the switch unit is disconnected, and the discharge unit is disconnected. The capacitor discharging circuit provided by the embodiment of the invention has the advantages that the existing discharging function of the circuit is ensured, and meanwhile, the protection circuit function is added, so that the circuit does not generate more loss during operation, and the problem of circuit burnout caused by false contact can be prevented.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a capacitor discharge circuit, a module power supply with the capacitor discharge circuit and a redundancy system.
Background
In high power applications, there are multiple parallel cases of module power sources for expanding power, especially in n+m redundant systems, and for convenience of maintenance, the module power sources may be replaced under the condition of no power failure, or although the module power sources are installed on line, it is possible that only part of the power is turned on for energy saving, and the module power source output may be electrified; because of the output capacitance, the output is electrified after the module power supply is pulled out, and the output voltage is reduced slowly when the module power supply is idle. Especially for high voltage output module power sources, there is a risk of electric shock if a person inadvertently touches the output terminals. Therefore, the general design will consider that a discharging resistor is added at the output end for discharging, when the module power supply is pulled out, the discharging resistor rapidly discharges to a safe voltage, and the danger of electric shock is avoided. Although the mode can avoid the danger of clicking after the module power supply is pulled out to a certain extent, no matter the power supply is started or shut down, the resistor is always at the output end, so that energy loss always exists, especially the loss can be larger under high-voltage output, in addition, in order to ensure the discharge speed after the module power supply is pulled out, the added resistor needs to be small in resistance value, and therefore the long-term work is caused, the loss is increased, and the reliability of a circuit is reduced.
Disclosure of Invention
The embodiment of the invention provides a capacitor discharge circuit, a module power supply and a redundant system, and aims to solve the problems of overhigh loss and low reliability of the capacitor discharge circuit in the current module power supply.
In a first aspect, an embodiment of the present invention provides a capacitive discharge circuit, for use in a module power supply, where the module power supply is configured to be pluggable connected to a bus interface board, and the capacitive discharge circuit includes a pull-out detection unit, a switch unit, and a discharge unit that are sequentially connected;
the extraction detection unit is used for detecting whether the module power supply is extracted from the bus interface board or not so as to control the on-off of the switch unit;
when the module power supply is pulled out, the switch unit is turned on, and the discharge unit discharges;
when the module power supply is not pulled out, the switch unit is disconnected, and the discharge unit is disconnected.
The further technical scheme is as follows: the discharge unit comprises a first capacitor and a discharge resistor; the switching unit comprises a switching tube, a zener diode and a voltage supply resistor; one end of the discharging resistor is connected with the positive electrode of the capacitor, and the other end of the discharging resistor is connected with the negative electrode of the capacitor through a switching tube of the switching unit; one end of the voltage supply resistor is connected with a power supply, the other end of the voltage supply resistor is connected with the cathode of the voltage stabilizing diode and the switching tube, and the anode of the voltage stabilizing diode is grounded.
The further technical scheme is as follows: the discharge resistor is formed by connecting a second resistor and a third resistor in parallel.
The further technical scheme is as follows: the voltage supply resistor is formed by connecting a first resistor, a fourth resistor and a fifth resistor in series.
The further technical scheme is as follows: the module power supply is inserted into the bus interface board, the first pin is connected with the grounding end on the bus interface board, and the other end of the sixth resistor is connected with the cathode of the first diode.
The further technical scheme is as follows: the module power supply is inserted into the bus interface board, the second pin is connected with the grounding end on the bus interface board, and the other end of the seventh resistor is connected with the cathode of the second diode.
The further technical scheme is as follows: the switch tube is an MOS tube.
The further technical scheme is as follows: the switching tube is an N-MOS tube.
In a second aspect, an embodiment of the present invention further provides a module power supply for pluggable connection to a bus interface board, where the module power supply includes a capacitive discharge circuit as described in the first aspect above.
In a third aspect, embodiments of the present invention further provide a redundancy system, including a bus interface board and a plurality of module power sources as described in the above second aspect, which are removably connected to the bus interface board.
Compared with the prior art, the invention has the following beneficial effects:
in the embodiment of the invention, a turn-off capacitor discharging circuit is provided, and a pull-out detection unit is used for detecting whether the module power supply is pulled out of a bus interface board or not so as to control the on-off of the switch unit; when the module power supply is pulled out, the switch unit is turned on, and the discharge unit discharges; when the module power is not pulled out, the switch unit is opened, and the discharge unit is disconnected. According to the embodiment of the invention, the pull-out detection unit circuit is arranged to detect whether the whole circuit module is pulled out, so that the turn-off discharging function of the capacitor circuit is realized, the loss is reduced, and the reliability of the circuit is higher.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a capacitive discharge circuit provided by an embodiment of the present invention;
fig. 2 is a specific circuit diagram of a capacitor discharging circuit according to an embodiment of the present invention.
FIG. 3 illustrates a pluggable mating relationship between a modular power supply and a bus interface board in a redundant system provided by an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Fig. 1 and 2 illustrate a capacitive discharge circuit 1000 according to an embodiment of the present invention. Fig. 3 illustrates the pluggable mating relationship of module power supplies 1010 and 1020 and bus interface board 1030 in a redundant system provided by an embodiment of the present invention.
Please refer to fig. 1 to 3. The capacitive discharge circuit 1000 provided in the embodiment of the present invention is used in a module power supply 1020, where the module power supply 1020 is used for being pluggable connected to a bus interface board 1030, and an interface end of the bus interface board 1030 includes a positive electrode 1031, a negative electrode 1032, and a ground terminal 1033. The bus interface board 1030 may be connected to a plurality of module power circuits to implement parallel connection of a plurality of modules to achieve the effect of expanding power.
The capacitive discharge circuit 1000 of the present embodiment includes a pull-out detection unit 100, a switching unit 200, and a discharge unit 300, which are sequentially connected. The pull-out detecting unit 100 is configured to detect whether the module power supply 1020 is pulled out from the bus interface board 1030, so as to control on/off of the switch unit 200. When the module power 1020 is unplugged, the switch unit 200 is turned on, and the discharge unit 300 discharges; when the module power 1020 is not pulled out, the switch unit 200 is turned off, and the discharge unit 300 is turned off to discharge. In the embodiment of the invention, the pull-out detection unit 100 is arranged to detect whether the whole circuit module is pulled out, so that the turn-off discharging function of the capacitor circuit 1000 is realized, the loss is reduced, and the reliability of the circuit is higher.
Referring to fig. 2, in the preferred embodiment, the discharge unit 300 includes a first capacitor C1 and a discharge resistor 301; the switching unit 200 includes a switching tube Q1, a zener diode ZD1, and a voltage supply resistor 201; one end of the discharging resistor 301 is connected with the positive electrode of the first capacitor C1, the other end of the discharging resistor is connected with the first connection end 1 of the switching tube Q1, and the second connection end 2 of the switching tube Q1 is connected with the negative electrode of the first capacitor C1 and grounded; one end of the voltage supply resistor 201 is connected with the positive electrode of the first capacitor C1, the other end of the voltage supply resistor is connected with the third connection end 3 of the switching tube and the negative electrode of the zener diode ZD1, and the positive electrode of the zener diode ZD1 is grounded.
Preferably, the discharge resistor 301 is formed by connecting a second resistor R2 and a third resistor R3 in parallel.
Preferably, the voltage supply resistor 201 is formed by serially connecting a first resistor R1, a fourth resistor R4 and a fifth resistor R5.
Preferably, the switching tube Q1 is a MOS tube. According to the characteristics of the circuit, an N-MOS transistor is selected as the switching transistor Q1. The gate of the switching tube Q1, i.e., the N-MOS tube, is connected between the voltage supply resistor 201 and the cathode of the zener diode ZD1, and is also connected to the pull-out detection unit circuit 100, the drain (first connection terminal 1) of the switching tube Q1 is connected to the power supply through the discharge resistor 301, and the source (second connection terminal 2) thereof is grounded. Therefore, the switching tube Q1 is turned on as soon as the gate (third connection 3) voltage reaches the threshold voltage.
Further, the pull-out detecting unit 100 includes a first detecting unit 101, where the first detecting unit 101 includes a first diode D1 and a sixth resistor R6, the anode of the first diode D1 is connected to the third connection end 3 of the switch tube Q1, the cathode of the first diode D is connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected to a first pin HS, and when the module power supply 1020 is plugged into the bus interface board 1030, the first pin HS is connected to the ground terminal 1033 on the bus interface board 1030. Optionally, the pull-out detection unit further includes a second detection unit 102, where the second detection unit 102 includes a second diode D2 and a seventh resistor R7, the positive electrode of the second diode D2 is connected to the third connection end 3 of the switch tube Q1, the negative electrode of the second diode D is connected to one end of the seventh resistor R7, the other end of the seventh resistor R7 is connected to a second pin HS1, and when the module power supply 1020 is plugged into the bus interface board 1030, the second pin HS1 is connected to the ground terminal 1033 on the bus interface board 1030 before the first pin HS. The second detecting unit 102 is an optional circuit, the first pin HS is used for inserting a start pin, that is, when the first pin HS is grounded, the module is started, in the golden finger interface application, please refer to fig. 3, the first pin HS may be designed to be the shortest pin, only when other pins are well contacted, the first pin HS is contacted, the module power supply 1020 can be started, but this causes problems for discharge detection, when other pins, such as positive and negative electrodes, are well contacted, and the first pin HS is not contacted, the module power supply 1020 is considered to be pulled out for the above circuit, but the output of the actual module power supply 1020 is electrified, the discharge resistor 301 is enabled to discharge, and loss may even cause burnout. Therefore, the second detection unit 102 is added, the second pin HS1 in the second detection unit 102 is set to be the longest pin of all pins, and is connected before other pins, so that the starting time sequence can be ensured, a discharging circuit can not be triggered by mistake, when the module power supply 1020 is connected, the end of the second pin HS1 is firstly and equivalently grounded, the gate of the switching tube Q1 is grounded, the switching tube Q1 is not conducted, the discharging unit 300 is disconnected and is not discharged, and loss and even burning are avoided; when the module power supply 1020 is pulled out, the end of the second pin HS1 is suspended at last, the grid electrode of the switching tube Q1 obtains a voltage stabilizing voltage, the switching tube Q1 is conducted, the first capacitor C1 in the discharging unit 300 is rapidly discharged to a safe voltage through the second resistor R2 and the third resistor R3, and the danger of electric shock is avoided.
As shown in fig. 3, the embodiment of the present invention further provides a power module 1020 and a redundancy system. The power module 1020 includes the capacitor discharge circuit 1000 and other related circuit units described in the above embodiments. The redundant system includes a bus interface board 1030 and a plurality of module power supplies that are removably connected to the bus interface board 1030. Other circuit configurations for power modules and redundancy systems are known to those skilled in the art and will not be described in detail herein.
Compared with the prior art, the invention has the following beneficial effects:
in the embodiment of the invention, a turn-off capacitor discharging circuit is provided, and a pull-out detection unit is used for detecting whether the module power supply is pulled out of a bus interface board or not so as to control the on-off of the switch unit; when the module power supply is pulled out, the switch unit is turned on, and the discharge unit discharges; when the module power is not pulled out, the switch unit is opened, and the discharge unit is disconnected. The circuit of the pull-out detection unit detects whether the whole circuit module is pulled out or not through the grounding of the port, if the whole circuit module is pulled out, the port is suspended, the switch unit is started, the discharge unit starts to discharge, and the charge on the capacitor discharges through the discharge resistor, so that the turn-off discharge function of the capacitor circuit is realized, meanwhile, the pull-out detection unit also comprises a second detection unit which has the same structure as the first detection unit, but is connected into the bus interface board before the first detection unit, the normal starting time sequence is ensured, the discharge circuit is not triggered by mistake, and the reliability of the circuit is higher while the loss is reduced.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (7)
1. The capacitive discharge circuit is used in a module power supply, and the module power supply is used for being connected to a bus interface board in a pluggable manner, and is characterized by comprising a pull-out detection unit, a switch unit and a discharge unit which are connected in sequence;
the extraction detection unit is used for detecting whether the module power supply is extracted from the bus interface board or not so as to control the on-off of the switch unit;
the discharge unit comprises a first capacitor and a discharge resistor; the switching unit comprises a switching tube, a zener diode and a voltage supply resistor; one end of the discharging resistor is connected with the positive electrode of the first capacitor, the other end of the discharging resistor is connected with the first connecting end of the switching tube, and the second connecting end of the switching tube is connected with the negative electrode of the first capacitor and grounded; one end of the voltage supply resistor is connected with the positive electrode of the first capacitor, the other end of the voltage supply resistor is connected with the third connecting end of the switching tube and the negative electrode of the zener diode, and the positive electrode of the zener diode is grounded;
the extraction detection unit comprises a first detection unit, the first detection unit comprises a first diode and a sixth resistor, the positive electrode of the first diode is connected to the third connecting end of the switch tube, the negative electrode of the first diode is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with a first pin, and when the module power supply is inserted into the bus interface board, the first pin is connected with the grounding end on the bus interface board; the extraction detection unit further comprises a second detection unit, the second detection unit comprises a second diode and a seventh resistor, the positive electrode of the second diode is connected to the third connecting end of the switching tube, the negative electrode of the second diode is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with a second pin, and when the module power supply is inserted into the bus interface board, the second pin is connected with the grounding end on the bus interface board before the first pin;
when the module power supply is pulled out, the switch unit is turned on, and the discharge unit discharges;
when the module power supply is not pulled out, the switch unit is disconnected, and the discharge unit is disconnected.
2. The capacitive discharge circuit of claim 1, wherein the discharge resistor is comprised of a second resistor in parallel with a third resistor.
3. The capacitive discharge circuit of claim 1, wherein the supply resistor is comprised of a first resistor, a fourth resistor, and a fifth resistor in series.
4. The capacitive discharge circuit of claim 1, wherein the switching tube is a MOS tube, the first connection terminal is a drain, the second connection terminal is a source, and the third connection terminal is a gate.
5. The capacitive discharge circuit of claim 4, wherein the switching tube is an enhancement N-MOS tube.
6. A modular power supply for pluggable connection to a bus interface board, said modular power supply comprising a capacitive discharge circuit according to any one of claims 1-5.
7. A redundant system comprising a bus interface board and a plurality of module power supplies removably connected to the bus interface board, the module power supplies being the module power supplies of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301450.8A CN106972743B (en) | 2017-05-02 | 2017-05-02 | Capacitor discharge circuit, and module power supply and redundancy system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301450.8A CN106972743B (en) | 2017-05-02 | 2017-05-02 | Capacitor discharge circuit, and module power supply and redundancy system with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106972743A CN106972743A (en) | 2017-07-21 |
| CN106972743B true CN106972743B (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710301450.8A Active CN106972743B (en) | 2017-05-02 | 2017-05-02 | Capacitor discharge circuit, and module power supply and redundancy system with same |
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| Country | Link |
|---|---|
| CN (1) | CN106972743B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151374A (en) * | 2021-11-05 | 2022-03-08 | 山东云海国创云计算装备产业创新中心有限公司 | Fan control circuit and host |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916983A (en) * | 2010-08-25 | 2010-12-15 | 海洋王照明科技股份有限公司 | Battery protection circuit and portable light |
| CN103023369A (en) * | 2011-09-27 | 2013-04-03 | 台达电子企业管理（上海）有限公司 | Capacitance discharge circuit and power converter |
| CN103580461A (en) * | 2012-08-09 | 2014-02-12 | 艾默生网络能源有限公司 | Power output discharging circuit |
| CN204538967U (en) * | 2015-03-05 | 2015-08-05 | 深圳奥特迅电力设备股份有限公司 | A kind of discharge control system |
| CN206060710U (en) * | 2016-09-30 | 2017-03-29 | 深圳欧陆通电子有限公司 | And electromechanical source hot plug protection circuit and and electromechanical source |
| CN206807281U (en) * | 2017-05-02 | 2017-12-26 | 茂硕电源科技股份有限公司 | Capacitor discharging circuit and modular power source and redundant system with the circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2387137B1 (en) * | 2010-05-13 | 2013-07-17 | Nxp B.V. | An SMPS having a saftey arrangement, a method of operating a SMPS, and a controller therefor |
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2017
- 2017-05-02 CN CN201710301450.8A patent/CN106972743B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916983A (en) * | 2010-08-25 | 2010-12-15 | 海洋王照明科技股份有限公司 | Battery protection circuit and portable light |
| CN103023369A (en) * | 2011-09-27 | 2013-04-03 | 台达电子企业管理（上海）有限公司 | Capacitance discharge circuit and power converter |
| CN103580461A (en) * | 2012-08-09 | 2014-02-12 | 艾默生网络能源有限公司 | Power output discharging circuit |
| CN204538967U (en) * | 2015-03-05 | 2015-08-05 | 深圳奥特迅电力设备股份有限公司 | A kind of discharge control system |
| CN206060710U (en) * | 2016-09-30 | 2017-03-29 | 深圳欧陆通电子有限公司 | And electromechanical source hot plug protection circuit and and electromechanical source |
| CN206807281U (en) * | 2017-05-02 | 2017-12-26 | 茂硕电源科技股份有限公司 | Capacitor discharging circuit and modular power source and redundant system with the circuit |
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| CN106972743A (en) | 2017-07-21 |
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