CN203983948U - A kind of three-phase alternating current electro-detection protective circuit - Google Patents
A kind of three-phase alternating current electro-detection protective circuit Download PDFInfo
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- CN203983948U CN203983948U CN201420278230.XU CN201420278230U CN203983948U CN 203983948 U CN203983948 U CN 203983948U CN 201420278230 U CN201420278230 U CN 201420278230U CN 203983948 U CN203983948 U CN 203983948U
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Abstract
The utility model discloses a kind of three-phase alternating current electro-detection protective circuit, comprise the first resistance～18 resistance, the first electric capacity～six electric capacity, the first diode～six diode, the first light-emitting diode, the second light-emitting diode, voltage stabilizing didoe, comparator, NPN type triode, positive-negative-positive triode, optical coupler, relay and DC power supply, the first resistance～nine resistance, the first electric capacity～three electric capacity and the first diode～six diode form testing circuit, the 12 resistance～14 resistance and comparator form hysteresis comparator circuit, the 15 resistance～18 resistance, NPN type triode, positive-negative-positive triode, optical coupler and relay form protection control circuit.A kind of three-phase alternating current electro-detection protective circuit described in the utility model, can set the control starting value of protection control circuit, and protective circuit misoperation when preventing that the Voltage unbalance of three-phase alternating current from also not affecting equipment and normally work improves the reliability of circuit.
Description
Technical field
The utility model relates to a kind of electric power auxiliary circuit, relates in particular to a kind of three-phase alternating current electro-detection protective circuit.
Background technology
At electric power, instrument, automatically control and the equipment such as power electronics in, need to use often needing to detect and judging the phase sequence of three-phase alternating-current supply and phase shortage whether of three-phase alternating current, if phase sequence is wrong or will warn in time when producing phase shortage, to prevent the damage equipment that causes the accident, even jeopardize personal safety.Current three-phase alternating current electro-detection protective circuit is easily interfered, misoperation when the Voltage unbalance of three-phase alternating current does not also affect the normal work of equipment.。
Summary of the invention
For above-mentioned the deficiencies in the prior art part, the utility model provides the three-phase alternating current electro-detection protective circuit that a kind of reliability is high.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of three-phase alternating current electro-detection protective circuit described in the utility model, comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, the 6th diode, the first light-emitting diode, the second light-emitting diode, voltage stabilizing didoe, comparator, NPN type triode, positive-negative-positive triode, optical coupler, relay and DC power supply, the first end of described the first resistance accesses the A phase of described three-phase alternating current, the first end of described the second resistance accesses the B phase of described three-phase alternating current, the first end of described the 3rd resistance accesses the C phase of described three-phase alternating current, the second end while of described the first resistance and the first end of described the 4th resistance, the first end of described the 5th resistance connects, the second end while of described the second resistance and the first end of described the 6th resistance, the first end of described the 7th resistance connects, the second end while of described the 3rd resistance and the first end of described the 8th resistance, the first end of described the 9th resistance connects, the second end of described the 4th resistance is connected with the positive pole of described the first diode, the second end of described the 6th resistance is connected with the first end of described the first electric capacity, the second end of described the first electric capacity is connected with the negative pole of described the second diode, the second end of described the 7th resistance is connected with the positive pole of described the 3rd diode, the second end of described the 8th resistance is connected with the first end of described the second electric capacity, the second end of described the second electric capacity is connected with the negative pole of described the 4th diode, the second end of described the 9th resistance is connected with the positive pole of described the 5th diode, the second end of described the 5th resistance is connected with the first end of described the 3rd electric capacity, the second end of described the 3rd electric capacity is connected with the negative pole of described the 6th diode, the negative pole while of described the first diode and the negative pole of described the 3rd diode, the negative pole of described the 5th diode, the first end of described the 4th electric capacity, the positive pole of described the first light-emitting diode connects, the negative pole while of described the first light-emitting diode and the first end of described the tenth resistance, the first end of described the 11 resistance, the negative pole of described voltage stabilizing didoe connects, the second end while of described the tenth resistance and the first end of described the 5th electric capacity, the inverting input of described comparator connects, the in-phase input end while of described comparator and the first end of described the 12 resistance, the first end of described the 13 resistance, the first end of described the 14 resistance connects, the second end while of described the 14 resistance and the first end of described the 15 resistance, the first end of described the 16 resistance, the first end of described the 17 resistance, the output of described comparator connects, the second end of described the 15 resistance is connected with the base stage of described NPN type triode, the collector electrode of described NPN type triode is connected with the negative pole of described the second light-emitting diode, the positive pole of described the second light-emitting diode is connected with the first end of described the 18 resistance, the second end while of described the 16 resistance and the first end of described the 6th electric capacity, the base stage of described positive-negative-positive triode connects, the emitter of described positive-negative-positive triode is connected with the negative input of described optical coupler, the emitter output of described optical coupler is connected with the first end of described relay, the anodal while of described DC power supply and the second end of described the 13 resistance, the second end of described the 18 resistance, the electrode input end of described optical coupler, the collector output of described optical coupler connects, the negative pole while of described DC power supply and the positive pole of described the second diode, the positive pole of described the 4th diode, the positive pole of described the 6th diode, the second end of described the 4th electric capacity, the positive pole of described voltage stabilizing didoe, the second end of described the 11 resistance, the second end of described the 5th electric capacity, the second end of described the 12 resistance, the second end of described the 17 resistance, the second end of described the 6th electric capacity, the collector electrode of described positive-negative-positive triode, the second end of described relay connects, and the normally-closed contact of described relay accesses in the electric wire of described three-phase alternating current.
Compared with prior art, the beneficial effects of the utility model:
A kind of three-phase alternating current electro-detection protective circuit described in the utility model, can set the control starting value of protection control circuit, and protective circuit misoperation when preventing that the Voltage unbalance of three-phase alternating current from also not affecting equipment and normally work improves the reliability of circuit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of three-phase alternating current electro-detection protective circuit described in the utility model.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of three-phase alternating current electro-detection protective circuit described in the utility model, comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 18 resistance R 18, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5, the 6th diode D6, the first light-emitting diode DL1, the second light-emitting diode DL2, voltage stabilizing didoe DZ, comparator UA, NPN type triode QP, positive-negative-positive triode QN, optical coupler U, relay K and DC power supply (+Vcc), the A phase of the first end access three-phase alternating current of the first resistance R 1, the B phase of the first end access three-phase alternating current of the second resistance R 2, the C phase of the first end access three-phase alternating current of the 3rd resistance R 3, the second end while of the first resistance R 1 and the first end of the 4th resistance R 4, the first end of the 5th resistance R 5 connects, the second end while of the second resistance R 2 and the first end of the 6th resistance R 6, the first end of the 7th resistance R 7 connects, the second end while of the 3rd resistance R 3 and the first end of the 8th resistance R 8, the first end of the 9th resistance R 9 connects, the second end of the 4th resistance R 4 is connected with the positive pole of the first diode D1, the second end of the 6th resistance R 6 is connected with the first end of the first capacitor C 1, the second end of the first capacitor C 1 is connected with the negative pole of the second diode D2, the second end of the 7th resistance R 7 is connected with the positive pole of the 3rd diode D3, the second end of the 8th resistance R 8 is connected with the first end of the second capacitor C 2, the second end of the second capacitor C 2 is connected with the negative pole of the 4th diode D4, the second end of the 9th resistance R 9 is connected with the positive pole of the 5th diode D5, the second end of the 5th resistance R 5 is connected with the first end of the 3rd capacitor C 3, the second end of the 3rd capacitor C 3 is connected with the negative pole of the 6th diode D6, the negative pole while of the first diode D1 and the negative pole of the 3rd diode D3, the negative pole of the 5th diode D5, the first end of the 4th capacitor C 4, the positive pole of the first light-emitting diode DL1 connects, the negative pole while of the first light-emitting diode DL1 and the first end of the tenth resistance R 10, the first end of the 11 resistance R 11, the negative pole of voltage stabilizing didoe DZ connects, the second end while of the tenth resistance R 10 and the first end of the 5th capacitor C 5, the inverting input of comparator UA connects, the in-phase input end while of comparator UA and the first end of the 12 resistance R 12, the first end of the 13 resistance R 13, the first end of the 14 resistance R 14 connects, the second end while of the 14 resistance R 14 and the first end of the 15 resistance R 15, the first end of the 16 resistance R 16, the first end of the 17 resistance R 17, the output of comparator UA connects, the second end of the 15 resistance R 15 is connected with the base stage of NPN type triode QP, the collector electrode of NPN type triode QP is connected with the negative pole of the second light-emitting diode DL2, the positive pole of the second light-emitting diode DL2 is connected with the first end of the 18 resistance R 18, the second end while of the 16 resistance R 16 and the first end of the 6th capacitor C 6, the base stage of positive-negative-positive triode QN connects, the emitter of positive-negative-positive triode QN is connected with the negative input of optical coupler U, the emitter output of optical coupler U is connected with the first end of relay K, the anodal while of DC power supply (+Vcc) and the second end of the 13 resistance R 13, the second end of the 18 resistance R 18, the electrode input end of optical coupler U, the collector output of optical coupler U connects, the negative pole while of DC power supply (+Vcc) and the positive pole of the second diode D2, the positive pole of the 4th diode D4, the positive pole of the 6th diode D6, the second end of the 4th capacitor C 4, the positive pole of voltage stabilizing didoe DZ, the second end of the 11 resistance R 11, the second end of the 5th capacitor C 5, the second end of the 12 resistance R 12, the second end of the 17 resistance R 17, the second end of the 6th capacitor C 6, the collector electrode of positive-negative-positive triode QN, the second end of relay K connects, in the electric wire of the normally-closed contact access three-phase alternating current of relay K.
A kind of three-phase alternating current electro-detection protective circuit described in the utility model; the first resistance R 1～nine resistance R 9, the first capacitor C 1～three capacitor C 3 and the first diode D1～six diode D6 form testing circuit; the 12 resistance R 12～14 resistance R 14 and comparator UA form hysteresis comparator circuit, and the 15 resistance R 15～18 resistance R 18, NPN type triode QP, positive-negative-positive triode QN, optical coupler U and relay K form protection control circuit.A kind of three-phase alternating current electro-detection protective circuit described in the utility model, testing circuit all can be exported different voltage when detecting the positive phase sequence of three-phase alternating current, negative phase sequence and phase shortage, reaches the object of detection; In hysteresis comparator circuit; regulate the voltage ratio of the 12 resistance R 12 and the 13 resistance R 13 to change the voltage of the in-phase input end of comparator UA; reach the control starting value of setting protection control circuit, protective circuit misoperation when preventing that the Voltage unbalance of three-phase alternating current from also not affecting equipment and normally work.A kind of three-phase alternating current electro-detection protective circuit described in the utility model, at three-phase alternating current during in positive phase sequence and non-phase shortage, comparator UA exports high level, NPN type triode QP conducting, the second light-emitting diode DL2 lights, positive-negative-positive triode QN cut-off, optical coupler U cut-off, relay K is failure to actuate; At three-phase alternating current, during in negative phase sequence or phase shortage, the first light-emitting diode DL1 lights, comparator UA output low level, NPN type triode QP cut-off, positive-negative-positive triode QN conducting, optical coupler U conducting, relay K adhesive, the normally-closed contact of relay K disconnects, and stops power supply to the device.
Claims (1)
1. a three-phase alternating current electro-detection protective circuit, is characterized in that: comprise the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, the 6th diode, the first light-emitting diode, the second light-emitting diode, voltage stabilizing didoe, comparator, NPN type triode, positive-negative-positive triode, optical coupler, relay and DC power supply, the first end of described the first resistance accesses the A phase of described three-phase alternating current, the first end of described the second resistance accesses the B phase of described three-phase alternating current, the first end of described the 3rd resistance accesses the C phase of described three-phase alternating current, the second end while of described the first resistance and the first end of described the 4th resistance, the first end of described the 5th resistance connects, the second end while of described the second resistance and the first end of described the 6th resistance, the first end of described the 7th resistance connects, the second end while of described the 3rd resistance and the first end of described the 8th resistance, the first end of described the 9th resistance connects, the second end of described the 4th resistance is connected with the positive pole of described the first diode, the second end of described the 6th resistance is connected with the first end of described the first electric capacity, the second end of described the first electric capacity is connected with the negative pole of described the second diode, the second end of described the 7th resistance is connected with the positive pole of described the 3rd diode, the second end of described the 8th resistance is connected with the first end of described the second electric capacity, the second end of described the second electric capacity is connected with the negative pole of described the 4th diode, the second end of described the 9th resistance is connected with the positive pole of described the 5th diode, the second end of described the 5th resistance is connected with the first end of described the 3rd electric capacity, the second end of described the 3rd electric capacity is connected with the negative pole of described the 6th diode, the negative pole while of described the first diode and the negative pole of described the 3rd diode, the negative pole of described the 5th diode, the first end of described the 4th electric capacity, the positive pole of described the first light-emitting diode connects, the negative pole while of described the first light-emitting diode and the first end of described the tenth resistance, the first end of described the 11 resistance, the negative pole of described voltage stabilizing didoe connects, the second end while of described the tenth resistance and the first end of described the 5th electric capacity, the inverting input of described comparator connects, the in-phase input end while of described comparator and the first end of described the 12 resistance, the first end of described the 13 resistance, the first end of described the 14 resistance connects, the second end while of described the 14 resistance and the first end of described the 15 resistance, the first end of described the 16 resistance, the first end of described the 17 resistance, the output of described comparator connects, the second end of described the 15 resistance is connected with the base stage of described NPN type triode, the collector electrode of described NPN type triode is connected with the negative pole of described the second light-emitting diode, the positive pole of described the second light-emitting diode is connected with the first end of described the 18 resistance, the second end while of described the 16 resistance and the first end of described the 6th electric capacity, the base stage of described positive-negative-positive triode connects, the emitter of described positive-negative-positive triode is connected with the negative input of described optical coupler, the emitter output of described optical coupler is connected with the first end of described relay, the anodal while of described DC power supply and the second end of described the 13 resistance, the second end of described the 18 resistance, the electrode input end of described optical coupler, the collector output of described optical coupler connects, the negative pole while of described DC power supply and the positive pole of described the second diode, the positive pole of described the 4th diode, the positive pole of described the 6th diode, the second end of described the 4th electric capacity, the positive pole of described voltage stabilizing didoe, the second end of described the 11 resistance, the second end of described the 5th electric capacity, the second end of described the 12 resistance, the second end of described the 17 resistance, the second end of described the 6th electric capacity, the collector electrode of described positive-negative-positive triode, the second end of described relay connects, and the normally-closed contact of described relay accesses in the electric wire of described three-phase alternating current.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420278230.XU CN203983948U (en) | 2014-05-28 | 2014-05-28 | A kind of three-phase alternating current electro-detection protective circuit |
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| CN201420278230.XU CN203983948U (en) | 2014-05-28 | 2014-05-28 | A kind of three-phase alternating current electro-detection protective circuit |
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| CN203983948U true CN203983948U (en) | 2014-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917152A (en) * | 2015-05-25 | 2015-09-16 | 张家港市华为电子有限公司 | Open-phase protection circuit in three-phase high-power switching power supply |
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2014
- 2014-05-28 CN CN201420278230.XU patent/CN203983948U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917152A (en) * | 2015-05-25 | 2015-09-16 | 张家港市华为电子有限公司 | Open-phase protection circuit in three-phase high-power switching power supply |
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| 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: 20141203 Termination date: 20150528 |
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| EXPY | Termination of patent right or utility model |