CN204615683U - A kind of household electrical appliance electric power system with overvoltage protection - Google Patents
A kind of household electrical appliance electric power system with overvoltage protection Download PDFInfo
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- CN204615683U CN204615683U CN201520191019.9U CN201520191019U CN204615683U CN 204615683 U CN204615683 U CN 204615683U CN 201520191019 U CN201520191019 U CN 201520191019U CN 204615683 U CN204615683 U CN 204615683U
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- unidirectional thyristor
- amplifier
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Abstract
The utility model discloses a kind of household electrical appliance electric power system with overvoltage protection, it is characterized in that: by transformer T, power circuit (1), the overvoltage crowbar (2) be connected with power circuit (1), the micro-processor interface circuit (3) be connected with transformer T secondary, and the amplifying circuit (4) to be connected with micro-processor interface circuit (3) and drive circuit (5) form, the described former limit of transformer T is connected with protective circuit (2); The utility model, when line voltage fluctuation occurs and causes overtension, automatically can carry out power-off to electric power system, do not damaged to protect electrical appliance by high voltage.
Description
Technical field
The utility model relates to a kind of for Circuits System, specifically refers to a kind of household electrical appliance electric power system with overvoltage protection.
Background technology
Along with the development of science and technology and people are to the continuous pursuit of quality of life, household electrical appliance, with through spreading to every household, have brought very large facility.The kind of current household appliances gets more and more, and performance is more and more automation also, and this just has higher requirement to household electrical appliances electric power system.Traditional household electrical appliances electric power system is easy to be affected when voltage ripple of power network, cannot protect when overtension to electrical appliance, causes electrical appliance to be subject to the damage of high pressure.Therefore, how carrying out overvoltage protection to household electrical appliance is then current institute urgent problem.
Utility model content
The purpose of this utility model is to overcome existing household electrical appliances electric power system cannot carry out overvoltage protection defect to household electrical appliance, provides a kind of household electrical appliance electric power system with overvoltage protection.
The purpose of this utility model is achieved through the following technical solutions: a kind of household electrical appliance electric power system with overvoltage protection, by transformer T, power circuit, the overvoltage crowbar be connected with power circuit, the micro-processor interface circuit be connected with transformer T secondary, and the amplifying circuit to be connected with micro-processor interface circuit and drive circuit form, the described former limit of transformer T is connected with protective circuit; Described protective circuit by unidirectional thyristor D2, triode VT1, the resistance R3 that one end is connected with the control pole of unidirectional thyristor D2, the other end is connected with the base stage of triode VT1; The diode D3 that N pole is connected with the P pole of unidirectional thyristor D2 after resistance R2 through resistance R4 in turn, P pole is connected with the N pole of unidirectional thyristor D2; The diode D4 that N pole is connected with the non-same polarity on the former limit of transformer T, P pole is connected with the N pole of unidirectional thyristor D2, and the resistance R5 that one end is connected with the Same Name of Ends on the former limit of transformer T, the other end is connected with the emitter of triode VT1 after relay K forms; Described resistance R2 is connected with the tie point of relay K with resistance R5 with the tie point of resistance R4, and the P pole of unidirectional thyristor D2 is extremely all connected with power circuit with N, and the base stage of triode VT1 is connected with the N pole of diode D3, grounded collector.
Further, described power circuit comprises diode bridge rectifier U, electric capacity C1, electric capacity C2, resistance R1, diode D1; The positive pole of electric capacity C1 is connected with an output of diode bridge rectifier U, minus earth, the P pole of diode D1 is simultaneously with the positive pole of electric capacity C1 and the P pole of unidirectional thyristor D2 is connected, N pole ground connection after electric capacity C2 and resistance R1 in turn, and another output of described diode bridge rectifier U is connected with the N pole of diode D1 and the N pole of unidirectional thyristor D2 simultaneously.
Described micro-processor interface circuit is by unidirectional thyristor D5, the resistance R8 that one end is connected with the N pole of unidirectional thyristor D5, the other end is connected with transformer T secondary non-same polarity and amplifying circuit simultaneously, the resistance R7 that P pole is connected, the other end is connected with drive circuit of one end and unidirectional thyristor D5, and the electric capacity C4 that negative pole is connected with drive circuit, positive pole is connected with transformer T secondary Same Name of Ends after resistance R6 through electric capacity C3 in turn forms; The control pole of described unidirectional thyristor D5 is connected with amplifying circuit, its P pole is also connected with drive circuit.
Described amplifying circuit is by amplifier P1, amplifier P2, one end is connected with the positive pole of amplifier P1, the resistance R12 of other end ground connection, the resistance R10 that one end is connected with the negative pole of amplifier P1, the other end is connected with transformer T secondary non-same polarity, the diode D6 that N pole is connected with the control pole of unidirectional thyristor D5, P pole is connected with the positive pole of amplifier P2, and one end is connected with the negative pole of amplifier P2, the resistance R11 of other end ground connection forms; The output of described amplifier P1 is as an output of circuit after the normally-closed contact K-1 of relay K, and the negative pole of amplifier P2 is connected with drive circuit.
Described drive circuit is by driving chip U1, triode VT2, the resistance R9 that one end is connected with the base stage of triode VT2, the other end is connected with the negative pole of amplifier P2 and the P pole of unidirectional thyristor D5 simultaneously, and the diode D7 that N pole is connected with the P pole of unidirectional thyristor D5 after resistance R7, P pole is connected with the VFF pin of driving chip U1 forms; The collector electrode of described triode VT2 is connected with the negative pole of amplifier P2, its base stage is connected with the CT pin of driving chip U2, emitter is connected with the FB pin of driving chip U2, and the VCC pin of driving chip U2 is connected with the negative pole of electric capacity C4, GND pin ground connection.
Described driving chip U1 is NCP1652 integrated circuit.
The utility model comparatively prior art is compared, and has the following advantages and beneficial effect:
(1) overall structure of the present utility model is very simple, not only makes and very easy to use, and stability is high;
(2) the utility model is when there is fluctuation and cause overtension in line voltage, automatically can carry out power-off to electric power system, not damaged to protect electrical appliance by high voltage;
(3), while the utility model makes increase power output by the effect of amplifying circuit, the energy consumption of input can't be increased, cost-saving.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1; the utility model is by transformer T; power circuit 1; the overvoltage crowbar 2 be connected with power circuit 1; the micro-processor interface circuit 3 be connected with transformer T secondary; and the amplifying circuit 4 to be connected with micro-processor interface circuit 3 and drive circuit 5 form, the described former limit of transformer T is connected with protective circuit 2.
Protective circuit 2 is emphasis place of the present utility model, and it is by unidirectional thyristor D2, triode VT1, the resistance R3 that one end is connected with the control pole of unidirectional thyristor D2, the other end is connected with the base stage of triode VT1; The diode D3 that N pole is connected with the P pole of unidirectional thyristor D2 after resistance R2 through resistance R4 in turn, P pole is connected with the N pole of unidirectional thyristor D2; The diode D4 that N pole is connected with the non-same polarity on the former limit of transformer T, P pole is connected with the N pole of unidirectional thyristor D2, and the resistance R5 that one end is connected with the Same Name of Ends on the former limit of transformer T, the other end is connected with the emitter of triode VT1 after relay K forms.Described resistance R2 is connected with the tie point of relay K with resistance R5 with the tie point of resistance R4, and the P pole of unidirectional thyristor D2 is extremely all connected with power circuit 1 with N, and the base stage of triode VT1 is connected with the N pole of diode D3, grounded collector.
Power circuit 1 can carry out rectifying and wave-filtering process to the line voltage of input, and it comprises diode bridge rectifier U, electric capacity C1, electric capacity C2, resistance R1, diode D1; The positive pole of electric capacity C1 is connected with an output of diode bridge rectifier U, minus earth, the P pole of diode D1 is simultaneously with the positive pole of electric capacity C1 and the P pole of unidirectional thyristor D2 is connected, N pole ground connection after electric capacity C2 and resistance R1 in turn, and another output of described diode bridge rectifier U is connected with the N pole of diode D1 and the N pole of unidirectional thyristor D2 simultaneously.Two inputs of described diode bridge rectifier U form the input of circuit.
Described micro-processor interface circuit 3 is by unidirectional thyristor D5, the resistance R8 that one end is connected with the N pole of unidirectional thyristor D5, the other end is connected with transformer T secondary non-same polarity and amplifying circuit 4 simultaneously, the resistance R7 that one end is connected with the P pole of unidirectional thyristor D5, the other end is connected with drive circuit 5, and the electric capacity C4 that negative pole is connected with drive circuit 5, positive pole is connected with transformer T secondary Same Name of Ends after resistance R6 through electric capacity C3 in turn forms.The control pole of described unidirectional thyristor D5 is connected with amplifying circuit 4, its P pole is also connected with drive circuit 5.
Described amplifying circuit 4 is by amplifier P1, amplifier P2, one end is connected with the positive pole of amplifier P1, the resistance R12 of other end ground connection, the resistance R10 that one end is connected with the negative pole of amplifier P1, the other end is connected with transformer T secondary non-same polarity, the diode D6 that N pole is connected with the control pole of unidirectional thyristor D5, P pole is connected with the positive pole of amplifier P2, and one end is connected with the negative pole of amplifier P2, the resistance R11 of other end ground connection forms.The output of described amplifier P1 is as an output of circuit after the normally-closed contact K-1 of relay K, and the negative pole of amplifier P2 is connected with drive circuit 5.
Described drive circuit 5 is by driving chip U1, triode VT2, the resistance R9 that one end is connected with the base stage of triode VT2, the other end is connected with the negative pole of amplifier P2 and the P pole of unidirectional thyristor D5 simultaneously, and the diode D7 that N pole is connected with the P pole of unidirectional thyristor D5 after resistance R7, P pole is connected with the VFF pin of driving chip U1 forms; The collector electrode of described triode VT2 is connected with the negative pole of amplifier P2, its base stage is connected with the CT pin of driving chip U2, emitter is connected with the FB pin of driving chip U2, and the VCC pin of driving chip U2 is connected with the negative pole of electric capacity C4, GND pin ground connection.In order to better implement the utility model, described driving chip U1 is preferably NCP1652 integrated circuit to realize.
When line voltage is normal, triode VT1 not conducting, relay K does not work, and electric power system normally supplies household electrical appliance.When causing voltage to exceed higher limit because of voltage ripple of power network, triode VT1 conducting, relay K obtains electric, and its normally-closed contact K-1 disconnects, thus protection household electrical appliance are not damaged by high voltage.
As mentioned above, just the utility model can well be realized.
Claims (6)
1. one kind has the household electrical appliance electric power system of overvoltage protection, it is characterized in that: by transformer T, power circuit (1), the overvoltage crowbar (2) be connected with power circuit (1), the micro-processor interface circuit (3) be connected with transformer T secondary, and the amplifying circuit (4) to be connected with micro-processor interface circuit (3) and drive circuit (5) form, the described former limit of transformer T is connected with protective circuit (2); Described protective circuit (2) by unidirectional thyristor D2, triode VT1, the resistance R3 that one end is connected with the control pole of unidirectional thyristor D2, the other end is connected with the base stage of triode VT1; The diode D3 that N pole is connected with the P pole of unidirectional thyristor D2 after resistance R2 through resistance R4 in turn, P pole is connected with the N pole of unidirectional thyristor D2; The diode D4 that N pole is connected with the non-same polarity on the former limit of transformer T, P pole is connected with the N pole of unidirectional thyristor D2, and the resistance R5 that one end is connected with the Same Name of Ends on the former limit of transformer T, the other end is connected with the emitter of triode VT1 after relay K forms; Described resistance R2 is connected with the tie point of relay K with resistance R5 with the tie point of resistance R4, and the P pole of unidirectional thyristor D2 is extremely all connected with power circuit (1) with N, and the base stage of triode VT1 is connected with the N pole of diode D3, grounded collector.
2. a kind of household electrical appliance electric power system with overvoltage protection according to claim 1, is characterized in that: described power circuit (1) comprises diode bridge rectifier U, electric capacity C1, electric capacity C2, resistance R1, diode D1; The positive pole of electric capacity C1 is connected with an output of diode bridge rectifier U, minus earth, the P pole of diode D1 is simultaneously with the positive pole of electric capacity C1 and the P pole of unidirectional thyristor D2 is connected, N pole ground connection after electric capacity C2 and resistance R1 in turn, and another output of described diode bridge rectifier U is connected with the N pole of diode D1 and the N pole of unidirectional thyristor D2 simultaneously.
3. a kind of household electrical appliance electric power system with overvoltage protection according to claim 2, it is characterized in that: described micro-processor interface circuit (3) is by unidirectional thyristor D5, one end is connected with the N pole of unidirectional thyristor D5, the resistance R8 that the other end is connected with transformer T secondary non-same polarity and amplifying circuit (4) simultaneously, one end is connected with the P pole of unidirectional thyristor D5, the resistance R7 that the other end is connected with drive circuit (5), and negative pole is connected with drive circuit (5), the electric capacity C4 that positive pole is connected with transformer T secondary Same Name of Ends after resistance R6 through electric capacity C3 in turn forms, the control pole of described unidirectional thyristor D5 is connected with amplifying circuit (4), its P pole is also connected with drive circuit (5).
4. a kind of household electrical appliance electric power system with overvoltage protection according to claim 3, it is characterized in that: described amplifying circuit (4) is by amplifier P1, amplifier P2, one end is connected with the positive pole of amplifier P1, the resistance R12 of other end ground connection, one end is connected with the negative pole of amplifier P1, the resistance R10 that the other end is connected with transformer T secondary non-same polarity, N pole is connected with the control pole of unidirectional thyristor D5, the diode D6 that P pole is connected with the positive pole of amplifier P2, and one end is connected with the negative pole of amplifier P2, the resistance R11 of other end ground connection forms, the output of described amplifier P1 is as an output of circuit after the normally-closed contact K-1 of relay K, and the negative pole of amplifier P2 is connected with drive circuit (5).
5. a kind of household electrical appliance electric power system with overvoltage protection according to claim 4, it is characterized in that: described drive circuit (5) is by driving chip U1, triode VT2, the resistance R9 that one end is connected with the base stage of triode VT2, the other end is connected with the negative pole of amplifier P2 and the P pole of unidirectional thyristor D5 simultaneously, and the diode D7 that N pole is connected with the P pole of unidirectional thyristor D5 after resistance R7, P pole is connected with the VFF pin of driving chip U1 forms; The collector electrode of described triode VT2 is connected with the negative pole of amplifier P2, its base stage is connected with the CT pin of driving chip U2, emitter is connected with the FB pin of driving chip U2, and the VCC pin of driving chip U2 is connected with the negative pole of electric capacity C4, GND pin ground connection.
6. a kind of household electrical appliance electric power system with overvoltage protection according to claim 5, is characterized in that: described driving chip U1 is NCP1652 integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520191019.9U CN204615683U (en) | 2015-03-31 | 2015-03-31 | A kind of household electrical appliance electric power system with overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520191019.9U CN204615683U (en) | 2015-03-31 | 2015-03-31 | A kind of household electrical appliance electric power system with overvoltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204615683U true CN204615683U (en) | 2015-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520191019.9U Expired - Fee Related CN204615683U (en) | 2015-03-31 | 2015-03-31 | A kind of household electrical appliance electric power system with overvoltage protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204615683U (en) |
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2015
- 2015-03-31 CN CN201520191019.9U patent/CN204615683U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20170331 |
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| CF01 | Termination of patent right due to non-payment of annual fee |