CN104617773A - Positive-negative automatic conversion circuit and power output module - Google Patents
Positive-negative automatic conversion circuit and power output module Download PDFInfo
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- CN104617773A CN104617773A CN201310539032.4A CN201310539032A CN104617773A CN 104617773 A CN104617773 A CN 104617773A CN 201310539032 A CN201310539032 A CN 201310539032A CN 104617773 A CN104617773 A CN 104617773A
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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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/20—Conversion of DC power input into DC power output without intermediate conversion into AC by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention is applicable to the field of household appliances, and provides a positive-negative automatic conversion circuit and a power output module. The positive-negative automatic conversion circuit comprises a first diode, first and second electrodes which are used for accessing a direct-current power supply, a relay, an absorption circuit which is connected between a first end and a second end of a coil, a positive output electrode which is connected with a first normally closed contact and a second normally open contact, and a negative output electrode which is connected with a first normally open contact and a second normally closed contact. Polarity conversion is realized by the relay. The relay is equivalent to any impedance when switched on, and the input voltage and output voltage are basically unchanged, so that there is no loss. Therefore, a lossless polarity conversion function is achieved.
Description
Technical field
The invention belongs to field of switch power, particularly relate to a kind of both positive and negative polarity automatic switching circuit and power supply output module.
Background technology
At present, the input wires of battery and DC power supply needs to be connected in strict accordance with positive-negative polarity, and existing rectifier bridge can realize dipole inversion function, but the diode losses of rectifier bridge is too large, especially battery-powered low-voltage and high-current circuit.
Summary of the invention
The object of the present invention is to provide a kind of loss-free both positive and negative polarity automatic switching circuit, utilize rectifier bridge to realize the problem that when both positive and negative polarity is changed, loss is large to solve.
The present invention is achieved in that a kind of household electrical appliance load driving circuits, comprising:
First diode;
For accessing the first electrode and second electrode of DC power supply;
Relay, comprise coil, the first moving contact with described first Electrode connection, the first normally opened contact associated with this first moving contact, the first normally-closed contact associated with this first moving contact, the second moving contact with described second Electrode connection, the second normally opened contact associated with this second moving contact and the second normally-closed contact associated with this second moving contact, wherein, the first end of described coil is connected with the anode of described first diode, the negative electrode of described first diode and described first Electrode connection, the second end of described coil and described second Electrode connection;
Absorbing circuit, is connected between the first end of described coil and the second end;
Positive output electrode, is connected with described first normally-closed contact, the second normally opened contact; And
Negative output electrode, is connected with described first normally opened contact, the second normally-closed contact.
In addition, additionally provide a kind of power supply output module, for powering load, comprise above-mentioned both positive and negative polarity automatic switching circuit, described load is connected between described positive output electrode and negative output electrode.
Above-mentioned both positive and negative polarity automatic switching circuit utilizes relay to realize dipole inversion, and relay is equivalent to any impedance after connecting, and constrained input voltage is substantially constant, so do not have lossless, so achieve harmless dipole inversion function.
Accompanying drawing explanation
The both positive and negative polarity automatic switching circuit theory diagram that Fig. 1 provides for the embodiment of the present invention;
The both positive and negative polarity automatic switching circuit schematic diagram that Fig. 2 provides for one embodiment of the invention;
The both positive and negative polarity automatic switching circuit schematic diagram that Fig. 3 provides for another embodiment of the present invention.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to figure 1, a kind of both positive and negative polarity automatic switching circuit, comprising: the first diode D1, the first electrode 101, second electrode 102, relay 200, absorbing circuit 300, positive output electrode 103 and negative output electrode 104.
First electrode 101 and the second electrode 102 are for accessing DC power supply (not shown); The first normally opened contact c that relay 200 comprises coil K1, the first moving contact a be connected with the first electrode 101, associate with this first moving contact a, the first normally-closed contact b, the second moving contact d be connected with the second electrode 102 that associate with this first moving contact a, the second normally opened contact f associated with this second moving contact d and the second normally-closed contact e associated with this second moving contact d.And the first end of coil K1 is connected with the anode of the first diode D1, the negative electrode of the first diode D1 is connected with the first electrode 101, and second end of coil K1 is connected with the second electrode 102; Absorbing circuit 300 is connected between the first end of coil K1 and the second end; Positive output electrode 103, is connected with the first normally-closed contact b, the second normally opened contact f; Negative output electrode 104 is connected with the first normally opened contact c, the second normally-closed contact e.
As above-mentioned, when the first electrode 101 and the second electrode 102 access positive pole and the negative pole of DC power supply respectively, the coil K1 electric current of relay 200 is ended by the first diode D1, is therefore failure to actuate, positive output electrode 103 and negative output electrode 104 output cathode voltage and cathode voltage respectively.And coil K1 obtains electric when the first electrode 101 and the second electrode 102 access negative pole and the positive pole of DC power supply respectively, first moving contact a, the second moving contact d are adsorbed by coil K1, be connected with the first normally opened contact c, the second normally opened contact f respectively, last positive output electrode 103 and negative output electrode 104 still difference output cathode voltage and cathode voltage.Coil K1 due to relay 200 is equivalent to any impedance when working, and constrained input voltage is substantially constant, lossless during work, so achieve harmless dipole inversion function.
In a preferred embodiment, with reference to figure 2 or 3, absorbing circuit 300 comprises the second diode D2, and the anode of the second diode D2 is connected with the first end of coil K1, and the negative electrode of the second diode D2 is connected with second end of coil K1.Second diode D2 shields to coil K1, the electric current on release coil K1.Further, absorbing circuit 300 also comprises the resistance in parallel with the second diode D2 or capacitor element.
In a further embodiment, with reference to figure 3, coil K1 comprises the first coil K11 connected in series or in parallel and the second coil K12, and wherein shown in Fig. 3 is the first coil K11 and the second coil K12 of series connection.First coil K11 controls the first moving contact a, the first normally-closed contact b and the first normally opened contact c, and the second coil K12 controls the second moving contact d, the second normally-closed contact e and the second normally opened contact f.
In the battery-powered product of use lithium-ion electric, the first electrode 101 and the second electrode 102 connect lithium battery, have and connect anti-possibility, if adopt this circuit to be inserted in power input stage, just can realize dipole inversion.Select relay 200 to select to choose according to cell voltage.The function of Here it is lossless and dipole inversion.
In addition, additionally provide a kind of power supply output module, for powering load, comprise above-mentioned both positive and negative polarity automatic switching circuit, load is connected between positive output electrode 103 and negative output electrode 104.Be provided with the load of this power supply output module, harmless dipole inversion can be provided for load, and load can be allowed to avoid the risk damaged during reversal connection power supply.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a both positive and negative polarity automatic switching circuit, is characterized in that, comprising:
First diode;
For accessing the first electrode and second electrode of DC power supply;
Relay, comprise coil, the first moving contact with described first Electrode connection, the first normally opened contact associated with this first moving contact, the first normally-closed contact associated with this first moving contact, the second moving contact with described second Electrode connection, the second normally opened contact associated with this second moving contact and the second normally-closed contact associated with this second moving contact, wherein, the first end of described coil is connected with the anode of described first diode, the negative electrode of described first diode and described first Electrode connection, the second end of described coil and described second Electrode connection;
Absorbing circuit, is connected between the first end of described coil and the second end;
Positive output electrode, is connected with described first normally-closed contact, the second normally opened contact; And
Negative output electrode, is connected with described first normally opened contact, the second normally-closed contact.
2. both positive and negative polarity automatic switching circuit as claimed in claim 1, it is characterized in that, described absorbing circuit comprises the second diode, and the anode of described second diode is connected with the first end of described coil, and the negative electrode of described second diode is connected with the second end of described coil.
3. both positive and negative polarity automatic switching circuit as claimed in claim 1 or 2, it is characterized in that, described coil comprises the first coil connected in series or in parallel and the second coil, described first coil controls described first moving contact, the first normally-closed contact and the first normally opened contact, and described second coil controls described second moving contact, the second normally-closed contact and the second normally opened contact.
4. a power supply output module, for powering load, is characterized in that, comprises the both positive and negative polarity automatic switching circuit described in any one of claims 1 to 3, and described load is connected between described positive output electrode and negative output electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310539032.4A CN104617773A (en) | 2013-11-04 | 2013-11-04 | Positive-negative automatic conversion circuit and power output module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310539032.4A CN104617773A (en) | 2013-11-04 | 2013-11-04 | Positive-negative automatic conversion circuit and power output module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104617773A true CN104617773A (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310539032.4A Pending CN104617773A (en) | 2013-11-04 | 2013-11-04 | Positive-negative automatic conversion circuit and power output module |
Country Status (1)
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| CN (1) | CN104617773A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591429A (en) * | 2015-12-31 | 2016-05-18 | 深圳市华思旭科技有限公司 | Wire-connection automatic control device |
| CN107689440A (en) * | 2017-10-19 | 2018-02-13 | 福建猛狮新能源科技有限公司 | Rising with dipole inversion function employs lithium-ions battery and its circuit |
| CN110571780A (en) * | 2019-10-29 | 2019-12-13 | 郑祖合 | A protection device for automatic conversion of positive and negative poles of automobile battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591429A (en) * | 2015-12-31 | 2016-05-18 | 深圳市华思旭科技有限公司 | Wire-connection automatic control device |
| CN105591429B (en) * | 2015-12-31 | 2018-07-06 | 深圳市华思旭科技有限公司 | Take fiery automaton |
| CN107689440A (en) * | 2017-10-19 | 2018-02-13 | 福建猛狮新能源科技有限公司 | Rising with dipole inversion function employs lithium-ions battery and its circuit |
| CN107689440B (en) * | 2017-10-19 | 2024-03-29 | 福建猛狮新能源科技有限公司 | Lithium ion battery with polarity conversion function for starting and circuit thereof |
| CN110571780A (en) * | 2019-10-29 | 2019-12-13 | 郑祖合 | A protection device for automatic conversion of positive and negative poles of automobile battery |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20150513 |