CN202042902U - DC supply reverse-connection prevention circuit with polarity distinction - Google Patents
DC supply reverse-connection prevention circuit with polarity distinction Download PDFInfo
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- CN202042902U CN202042902U CN2010206945721U CN201020694572U CN202042902U CN 202042902 U CN202042902 U CN 202042902U CN 2010206945721 U CN2010206945721 U CN 2010206945721U CN 201020694572 U CN201020694572 U CN 201020694572U CN 202042902 U CN202042902 U CN 202042902U
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Abstract
The utility model relates to a control technique, in particular to a DC supply reverse-connection prevention circuit with polarity distinction. The DC supply reverse-connection prevention circuit is divided into two branch circuits connected in parallel, wherein the first branch circuit comprises at least one heavy-current electronic switch unit circuit, and a DC supply is output through the heavy-current electronic switch unit circuit; and the second branch circuit comprises at least one unilateral conduction circuit, the DC supply is connected with a control unit power supply through the unilateral conduction circuit, and the control unit power supply supplies power for a main-control microprocessor; and the output of the main-control microprocessor is connected to the input end of a drive circuit and the output end of the drive circuit is connected to the control end of the heavy-current electronic switch unit circuit. In the DC supply reverse-connection prevention circuit, the DC supply of a controller circuit is divided into two parts: the power supply of the low-current control part utilizes a diode for reverse-connection prevention, and the control of the high-current conversion part adopts a device with electronic switching functions to combine with a soft start circuit, so as to realize reverse-connection prevention and impact prevention.
Description
Technical field
The utility model relates to a control technology, the anti-reverse connection circuit of direct current power supply that particularly has polarity to distinguish.
Background technology
The anti-reverse technology of DC power supply such as existing solar battery array substantially all is based on the access diode and carries out anti-reverse, perhaps use the IGBT of band diode to manage, FET pipe etc. made reverse-connection preventing circuit, circuit is simple relatively, but such circuit all has a problem: the energy of additive decrementation solar energy when operate as normal, and also heating is serious.
The utility model content
The utility model is to provide a kind of anti-reverse connection circuit of direct current power supply that has polarity to distinguish, to solve prior art reverse-connection preventing circuit the additive decrementation DC power supply energy and the serious technical problem of generating heat when the operate as normal.
The technical scheme that adopts is as follows:
A kind of anti-reverse connection circuit of direct current power supply that has polarity to distinguish, described anti-reverse connection circuit of direct current power supply has electrode input end, negative input, cathode output end and cathode output end, the electrode input end of anti-reverse connection circuit of direct current power supply and negative input insert has DC power supply anodal and two kinds of polarity of negative pole, it is characterized in that the electrode input end of anti-reverse connection circuit of direct current power supply and negative input are divided into the branch road of two parallel connections:
First branch road comprises at least one heavy-current electronic switch element circuit, and DC power supply is by the output of heavy-current electronic switch element circuit;
Second branch road comprises at least one unilateal conduction circuit, and DC power supply is connected with the control unit power supply by the unilateal conduction circuit, and the control unit power supply is powered to main control microprocessor;
The output of main control microprocessor is connected to the input of drive circuit, and the output of drive circuit is connected to the control end of heavy-current electronic switch element circuit.
As a kind of preferred version, in the parallel connection of the two ends of heavy-current electronic switch circuit a unidirectional protecting against shock circuit.
As further preferred version, described first branch road comprises a heavy-current electronic switch element circuit and/or second largest current electrical switch element circuit, described second branch road comprises the first unilateal conduction circuit and/or the second unilateal conduction circuit, the electrode input end of anti-reverse connection circuit of direct current power supply links to each other with an end of first current electrical switch circuit, the other end of first current electrical switch is connected with the cathode output end of anti-reverse connection circuit of direct current power supply, the negative input of anti-reverse connection circuit of direct current power supply links to each other with an end of second largest current electrical switch circuit, and the other end of second largest current electrical switch links to each other with the cathode output end of anti-reverse connection circuit of direct current power supply.
As a kind of preferred version, described unilateal conduction circuit is a diode.
As further preferred version, described second branch road comprises first diode and/or second diode, the anode of first diode links to each other with reference ground, its negative electrode is connected with the negative input of anti-reverse connection circuit of direct current power supply, the anode of second diode is connected with the electrode input end of anti-reverse connection circuit of direct current power supply, and its negative electrode is connected with the input of control unit power supply.
As a kind of preferred version: be parallel with the DC power supply voltage sample circuit between the cathode output end of anti-reverse connection circuit of direct current power supply and the cathode output end or between the electrode input end of anti-reverse connection circuit of direct current power supply and negative input, the output of DC power supply voltage sample circuit is connected to main control microprocessor.
As a kind of preferred version, the output of described anti-reverse connection circuit of direct current power supply is connected with the filtering storage capacitor of power conversion circuit prime, the cathode output end of anti-reverse connection circuit of direct current power supply is connected with the electrode input end of power conversion circuit, and the cathode output end of anti-reverse connection circuit of direct current power supply is connected with the negative input of power conversion circuit.
Preferably, the heavy-current electronic switch element circuit is a relay.
Description of drawings
Accompanying drawing 1 theory diagram of the present utility model;
Accompanying drawing 2 specific embodiment of the utility model 1;
Accompanying drawing 3 specific embodiment of the utility model 2.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the concrete grammar of the technical program is: input has anodal Vi+ and two kinds of polarity of negative pole Vi-, and as solar cell and so on, its output is connected with the filtering storage capacitor E1 of power conversion circuit prime; Anodal Vi+ end and negative pole Vi-hold and are divided into two branch roads, and a branch road is connected to little current control division, and another branch road is connected to big current transformation portion.
Little current control division comprises diode D1 and/or D2, control unit power supply 1, drive circuit 4, main control MCU 5 and other functional unit; The anode of diode D1 links to each other with the reference of little current control division ground, its negative electrode is connected with the negative pole Vi-of DC power supply, the anode of diode D2 is connected with the Vi+ of DC power supply, its negative electrode is connected with the input P of control unit power supply 1, and control unit power supply 1 provides the power supply of little all control circuits of current control division.
Big current transformation portion comprises heavy-current electronic switch element circuit 2a and/or heavy-current electronic switch element circuit 2b, DC power supply voltage sample circuit 3, power inverter and other functional circuit; Wherein the Vi+ end links to each other with the end of heavy-current electronic switch circuit 2b, the other end of heavy-current electronic switch 2b links to each other with the input Vo+ end of power inverter, the Vi-end links to each other with the end of heavy-current electronic switch circuit 2a, the other end of heavy-current electronic switch 2a links to each other with the input Vo-end of power inverter, the output of main control MCU 5 is connected to the input of drive circuit 4, and the output of drive circuit 4 is connected to the control end of heavy-current electronic switch element circuit 2a and 2b.
In the two ends parallel connection of heavy-current electronic switch circuit 2b one from the V+ end flows into, the Vo+ end flows out unidirectional protecting against shock circuit 6b; In the two ends parallel connection of heavy-current electronic switch circuit 2a one from the Vo-end flows into, the V-end flows out unidirectional protecting against shock circuit 6a.DC power supply voltage sample circuit 3 be connected in parallel between Vo+ end and the Vo-end or be connected in parallel on the Vi+ end and Vi-hold between, its output is connected to main control MCU 5.
Control method is described below:
When only keeping the 2a circuit or only keeping the 2b circuit or 2a/2b circuit when all existing, be in off-state under the heavy-current electronic switch element circuit normal condition; When DC power supply input polarity inserted mistake, diode D1/D2 was in reverse state, and control unit power supply 1 is not worked; Because of non-transformer provides; main control MCU 5, drive circuit 4 are not all worked; thereby make the heavy-current electronic switch element circuit be in off-state; the back level does not have power supply to provide; so can not damage the circuit of back level; play the effect that connects protection late-class circuit under the anti-situation at electric power polarity, finish anti-reverse function.
When DC power supply input polarity inserts when correct, the supply voltage of DC power supply controller control unit power supply 1 is correctly set up, and exports to relevant control circuit; Unidirectional protecting against shock circuit 6 is in conducting state, carries out current-limiting charge for the filtering storage capacitor E1 of back level; Main control MCU 5 is delayed time a period of time T after second by the delay function of inside when the main control MCU electrification reset is started working, output is opened signal and is given drive circuit 4, and then the control end of signal to heavy-current electronic switch element circuit 2a, 2b opened in drive circuit 4 output controls, the heavy-current electronic switch element circuit is connected, entered normal operating conditions.
Adding DC power supply voltage sample circuit 3,3 pairs of voltages of DC power supply voltage sample circuit are monitored, sampling voltage is transferred to main control MCU 5, main control MCU 5 detects this voltage and calculates the climbing speed of this voltage, when judging that this speed is lower than a1 during volt/second, output is opened signal and is given drive circuit 4, and then the control end of signal to heavy-current electronic switch element circuit 2a, 2b opened in drive circuit 4 output controls, heavy-current electronic switch element circuit 2a, 2b are connected, enter normal operating conditions.
First embodiment as shown in Figure 2, method of work is described below:
The output of solar cell is direct voltage, and being typically has polarity power, and its input has anodal Vi+ and two kinds of polarity of negative pole Vi-, and its output is connected with the filtering storage capacitor E1 of power conversion circuit prime; Anodal Vi+ end and negative pole Vi-hold and are divided into two branch roads, and a branch road is connected to little current control division, and another branch road is connected to big current transformation portion.
Little current control division comprises diode D1, controller for solar control unit power supply :+3.3V ,+5V ,+12V ,+15V, drive circuit, main control MCU; The anode of diode D1 is connected with the Vi+ of DC power supply, and its negative electrode is connected with the input of control unit power supply, and the ground of control unit power supply directly is connected with Vi-.Big current transformation portion comprises: resistance pressure-dividing network voltage sample circuit, Hall current sample circuit, relay DL1, protecting against shock circuit D2 and RT1 branch road, back level solar energy inverter circuit; Wherein the Vi+ end links to each other with 1 pin of relay, and 2 pin of relay link to each other with the Vo+ end, and Vi-holds and links to each other with the Vo2-end of solar inverter, and the control end power supply of relay is+12V.
When the polarity of solar battery array connects inverse time, promptly Vi+ connects negative terminal, Vi-connects anode, and diode D1 is in reverse state, and controller for solar control unit power supply is not worked; Nothing+3.3V ,+5V ,+12V ,+the 15V power supply provides; main control MCU 5, drive circuit, relay DL1 all do not work because of there being power supply; relay disconnects; D2 instead ends partially; the back level does not have power supply to provide; so can not damage the circuit of back level, electric power polarity connects the effect of protection late-class circuit under the anti-situation, finishes anti-reverse function.
When the polarity of solar battery array inserts when correct, promptly Vi+ connects anode, Vi-connects negative terminal, and diode D1 is in the forward conduction state, controller for solar control unit power work; Have+3.3V ,+5V ,+12V ,+the 15V power supply provides main control MCU 5, drive circuit, relay DL1 operate as normal.
Accompanying drawing 3 is examples of another use, its difference is that relay DL1, protecting against shock circuit D2 are connected with Vi-with the RT1 branch road, wherein the Vi-end links to each other with 1 pin of relay, 2 pin of relay link to each other with the Vo-end, Vi+ holds and links to each other with the Vo+ end of solar inverter, other and first embodiment is similar substantially, does not state applying at this.
Claims (7)
1. anti-reverse connection circuit of direct current power supply that has polarity to distinguish, it is characterized in that, described anti-reverse connection circuit of direct current power supply has electrode input end, negative input, cathode output end and cathode output end, the electrode input end of anti-reverse connection circuit of direct current power supply and negative input insert has DC power supply anodal and two kinds of polarity of negative pole, it is characterized in that the electrode input end of anti-reverse connection circuit of direct current power supply and negative input are divided into the branch road of two parallel connections:
First branch road comprises at least one heavy-current electronic switch element circuit, and DC power supply is by the output of heavy-current electronic switch element circuit;
Second branch road comprises at least one unilateal conduction circuit, and DC power supply is connected with the control unit power supply by the unilateal conduction circuit, and the control unit power supply is powered to main control microprocessor;
The output of main control microprocessor is connected to the input of drive circuit, and the output of drive circuit is connected to the control end of heavy-current electronic switch element circuit.
2. anti-reverse connection circuit of direct current power supply according to claim 1 is characterized in that, in the parallel connection of the two ends of heavy-current electronic switch circuit a unidirectional protecting against shock circuit.
3. anti-reverse connection circuit of direct current power supply according to claim 2, it is characterized in that, described first branch road comprises first current electrical switch element circuit and/or second largest current electrical switch element circuit, described second branch road comprises the first unilateal conduction circuit and/or the second unilateal conduction circuit, the electrode input end of anti-reverse connection circuit of direct current power supply links to each other with an end of first current electrical switch element circuit, the other end of first current electrical switch element circuit is connected with the cathode output end of anti-reverse connection circuit of direct current power supply, the negative input of anti-reverse connection circuit of direct current power supply links to each other with an end of second largest current electrical switch element circuit, and the other end of second largest current electrical switch links to each other with the cathode output end of anti-reverse connection circuit of direct current power supply.
4. anti-reverse connection circuit of direct current power supply according to claim 1 is characterized in that, described unilateal conduction circuit is a diode.
5. anti-reverse connection circuit of direct current power supply according to claim 4, it is characterized in that, described second branch road comprises first diode and/or second diode, the anode of first diode links to each other with reference ground, its negative electrode is connected with the negative input of anti-reverse connection circuit of direct current power supply, the anode of second diode is connected with the electrode input end of anti-reverse connection circuit of direct current power supply, and its negative electrode is connected with the input of control unit power supply.
6. anti-reverse connection circuit of direct current power supply according to claim 1, it is characterized in that: be parallel with the DC power supply voltage sample circuit between the cathode output end of anti-reverse connection circuit of direct current power supply and the cathode output end or between the electrode input end of anti-reverse connection circuit of direct current power supply and negative input, the output of DC power supply voltage sample circuit is connected to main control microprocessor.
7. anti-reverse connection circuit of direct current power supply according to claim 1, it is characterized in that, the output of described anti-reverse connection circuit of direct current power supply is connected with the filtering storage capacitor of power conversion circuit prime, the cathode output end of anti-reverse connection circuit of direct current power supply is connected with the electrode input end of power conversion circuit, and the cathode output end of anti-reverse connection circuit of direct current power supply is connected with the negative input of power conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206945721U CN202042902U (en) | 2010-12-31 | 2010-12-31 | DC supply reverse-connection prevention circuit with polarity distinction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206945721U CN202042902U (en) | 2010-12-31 | 2010-12-31 | DC supply reverse-connection prevention circuit with polarity distinction |
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| Publication Number | Publication Date |
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| CN202042902U true CN202042902U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206945721U Expired - Lifetime CN202042902U (en) | 2010-12-31 | 2010-12-31 | DC supply reverse-connection prevention circuit with polarity distinction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055184A (en) * | 2010-12-31 | 2011-05-11 | 广东美的电器股份有限公司 | Direct current power supply reversed connection preventing circuit with polarity distinguishing and control method thereof |
| CN110707901A (en) * | 2019-05-24 | 2020-01-17 | 沈阳君印科技有限公司 | Parallel connection method for direct current power supplies |
| CN112019013A (en) * | 2020-09-01 | 2020-12-01 | 北京理工华创电动车技术有限公司 | High-power DCDC anti-impact reverse-connection-prevention slow starting circuit and control method |
| CN113474965A (en) * | 2020-11-19 | 2021-10-01 | 深圳市华思旭科技有限公司 | Intelligent connecting device, starting power supply and storage battery clamp |
-
2010
- 2010-12-31 CN CN2010206945721U patent/CN202042902U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055184A (en) * | 2010-12-31 | 2011-05-11 | 广东美的电器股份有限公司 | Direct current power supply reversed connection preventing circuit with polarity distinguishing and control method thereof |
| CN102055184B (en) * | 2010-12-31 | 2013-10-09 | 广东美的电器股份有限公司 | Direct current power supply reversed connection preventing circuit with polarity distinguishing and control method thereof |
| CN110707901A (en) * | 2019-05-24 | 2020-01-17 | 沈阳君印科技有限公司 | Parallel connection method for direct current power supplies |
| CN112019013A (en) * | 2020-09-01 | 2020-12-01 | 北京理工华创电动车技术有限公司 | High-power DCDC anti-impact reverse-connection-prevention slow starting circuit and control method |
| CN113474965A (en) * | 2020-11-19 | 2021-10-01 | 深圳市华思旭科技有限公司 | Intelligent connecting device, starting power supply and storage battery clamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20131205 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131205 Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: Midea Group Co., Ltd. Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6 Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111116 |
|
| CX01 | Expiry of patent term |