CN201150036Y - Relay driven power supply circuit - Google Patents
Relay driven power supply circuit Download PDFInfo
- Publication number
- CN201150036Y CN201150036Y CNU2008200914421U CN200820091442U CN201150036Y CN 201150036 Y CN201150036 Y CN 201150036Y CN U2008200914421 U CNU2008200914421 U CN U2008200914421U CN 200820091442 U CN200820091442 U CN 200820091442U CN 201150036 Y CN201150036 Y CN 201150036Y
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- CN
- China
- Prior art keywords
- relay
- power supply
- supply circuit
- circuit
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a power supply circuit driven by a relay. The power supply circuit comprises a voltage-reduction capacitor arranged on the output line of a null line of alternating current, a bridge type rectification circuit connected with the voltage- reduction circuit, and a voltage stabilizing tube connected with the bridge type rectification circuit, a relay and a relay driving circuit connected with the relay are also connected in the power supply circuit, the two coil pins of the relay are connected with the voltage stabilizing tube in parallel, the normally closed contact point is connected at the output end of the live line of the alternating current, and the normally opened contact point as the output terminal of the power supply circuit is connected with a load. The power supply circuit has the advantages that a voltage-reduction capacitor with a high capacitance value is not required to be selected, the assembly volume of the PCB board is saved, the cost is reduced, the power consumption is low, the reliability is high, and the power supply circuit is energy saving and environmental protective.
Description
Technical field
The utility model relates to the power circuit technology of household appliances, relates in particular to the power circuit that a kind of relay drives.
Background technology
In the power circuit of household appliances, the conventional means that the circuit civil power is converted to low-voltage DC is to adopt after the transformer step-down rectifying and wave-filtering again, and when being subjected to the restriction of factors such as volume and cost, the most simple and practical method adopts resistance-capacitance depressurization formula power supply exactly.It is a kind of power supply of obtaining the little electric current of non-isolation, and output voltage depends on the voltage-stabiliser tube of use, and the size of current that can provide is proportional to the current limiting capacitance capacity, and the resistance-capacitance depressurization power supply is constant-current source in fact.And when adopting this resistance-capacitance depressurization power supply in the circuit, when needing again to use the power source for relay control circuit, 12V or 24V drive because relay generally adopts, relay drives current sinking generally at 10-20mA, this just requires, and decompression capacitor appearance value becomes big in the corresponding resistance-capacitance depressurization power supply, thereby the volume that causes the pcb board assembling becomes big, has influenced the production cost of entire product.
The utility model content
Technical problem to be solved in the utility model is: the power circuit that provides a kind of tape relay to drive, and this power circuit need not to use the decompression capacitor of Da Rong value, simplicity of design, cost is low, low in energy consumption, reliability is high.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
The power circuit that a kind of relay drives, comprise the decompression capacitor that is arranged on the alternating current zero line outlet line, the bridge rectifier that is connected with described reduction voltage circuit, the voltage-stabiliser tube that is connected with described bridge rectifier, the relay drive circuit that also is connected with a relay in this power circuit and is connected with described relay, two coil pin of this relay are connected the alternating current fire wire output with described voltage-stabiliser tube parallel connection, its normally-closed contact, normally opened contact is connected load as the output of power circuit.
The beneficial effects of the utility model are:
Embodiment of the present utility model utilizes current in loop to come control relay by relay coil is connected in the electric power loop, thereby need not to select for use the decompression capacitor of big capacitance, saved the assembling volume of pcb board, reduced cost, and low in energy consumption, reliability is high, not only energy-conservation but also environmental protection.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Description of drawings
Fig. 1 is the circuit theory diagrams of an embodiment of the present utility model.
Embodiment
With reference to figure 1, this figure is the circuit theory diagrams of an embodiment of the present utility model; Among the figure, ZNR1 is a piezo-resistance, the surge impact that its effect brings when being the absorbing load startup; C 1 is a decompression capacitor, and R1 is the electric charge bleed off resistance of C 1 behind the powered-down; It is voltage-stabiliser tube that diode D1, D2, D3 and D4 form bridge rectifier Z1; The coils from parallel connection of coils of relay R Y1 on the voltage-stabiliser tube Z1, its normally-closed contact is connected on the alternating current fire wire outlet line, normally-closed contact is as the output of power circuit; Controller MCU and triode TR1, triode TR2 form control relay circuit.
When MCU port output low level, TR2 ends, and TR1 ends, the control relay adhesive;
When MCU port output high level, the TR2 conducting, the TR1 conducting, relay disconnects, from the voltage of alternating current output output after C1 step-down, bridge rectifier rectification, voltage-stabiliser tube D1 voltage stabilizing, as the DC power supply output of 5V.
The above is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement and deduction or replace, these improve and deduction or replace also are considered as protection range of the present utility model.
Claims (3)
1, a kind of power circuit of relay driving, comprise the decompression capacitor that is arranged on the alternating current zero line outlet line, the bridge rectifier that is connected with described reduction voltage circuit, the voltage-stabiliser tube that is connected with described bridge rectifier, it is characterized in that: the relay drive circuit that also is connected with a relay in this power circuit and is connected with described relay, two coil pin of this relay are connected the alternating current fire wire output with described voltage-stabiliser tube parallel connection, its normally-closed contact, normally opened contact is connected load as the output of power circuit.
2, the power circuit of relay driving as claimed in claim 1 is characterized in that described relay drive circuit comprises controller and two triodes that are connected with described controller successively.
3, the power circuit that drives of relay as claimed in claim 1 or 2 is characterized in that, also is parallel with a piezo-resistance at the output of AC power, and the two ends of this piezo-resistance are connected on the live wire and zero line outlet line of alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200914421U CN201150036Y (en) | 2008-01-07 | 2008-01-07 | Relay driven power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200914421U CN201150036Y (en) | 2008-01-07 | 2008-01-07 | Relay driven power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201150036Y true CN201150036Y (en) | 2008-11-12 |
Family
ID=40117808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200914421U Expired - Fee Related CN201150036Y (en) | 2008-01-07 | 2008-01-07 | Relay driven power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201150036Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687732A (en) * | 2019-01-25 | 2019-04-26 | 深圳市锐同技术有限公司 | A kind of capacitor step-down power supply with control function |
-
2008
- 2008-01-07 CN CNU2008200914421U patent/CN201150036Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687732A (en) * | 2019-01-25 | 2019-04-26 | 深圳市锐同技术有限公司 | A kind of capacitor step-down power supply with control function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Zhigen Inventor after: Yuan Tianlong Inventor after: Liu Jianwei Inventor after: Dong Xiaoyong Inventor before: Wang Zhigen Inventor before: Yuan Tiannong Inventor before: Liu Jianwei Inventor before: Dong Xiaoyong |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG ZHIGEN; YUAN TIANNONG; LIU JIANWEI; DONG XIAOYONG TO: WANG ZHIGEN; YUAN TIANLONG; LIU JIANWEI; DONG XIAOYONG |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20170107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |