CN202513548U - Novel solid-state power source phase sequence protector with output isolation - Google Patents
Novel solid-state power source phase sequence protector with output isolation Download PDFInfo
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- CN202513548U CN202513548U CN2012200052572U CN201220005257U CN202513548U CN 202513548 U CN202513548 U CN 202513548U CN 2012200052572 U CN2012200052572 U CN 2012200052572U CN 201220005257 U CN201220005257 U CN 201220005257U CN 202513548 U CN202513548 U CN 202513548U
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- phase sequence
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- phase
- power source
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Abstract
The utility model relates to a novel solid-state power source phase sequence protector with output isolation, wherein the phase sequence relay comprises an RC network phase sequence detection circuit, a diode bridge rectifier circuit, a constant current driving circuit, an isolation zero-crossing trigger circuit, a bidirectional thyristor output action circuit. The RC network phase sequence detection circuit employs a resistor and three same capacitors to realize phase dislocation detection. The output action is realized by connection and disconnection of the bidirectional thyristor; and contactless work can be carried out. A zero-crossing trigger opto-coupler controls the bidirectional thyristor and the isolation of the output and the input is realized. The constant current driving circuit enables the driving current of the opto-coupler to maintain invariable when detected three-phase voltages are changed in a wide range. The input employs three-phase lines including an A line, a B line and a C line without the need of a zero line and the output can be used to directly drive a contact coil controlled an on-off three-phase power supply, wherein the input and the output are isolated; and the protector can be applied to a three-phase four-line system and a three-phase three-line system. Besides, the power source phase sequence protector is solidly packaged into a component or a module with three ports for input and two ports for output; and the protection motion has no contact and no spark. Moreover, the provided power source phase sequence protector has advantages of simple structure, convenient usage, small volume and long service life, security and reliability and wide application range and the like.
Description
Technical field
The utility model relates to a kind of phase sequence relay, relates to the protector of three-phase alternating-current supply phase sequence identification.Three-phase alternating-current supply phase sequence mistake can cause the three phase electric machine counter-rotating and cause accident to take place that general power consumption equipment has strict requirement to the phase sequence of three phase mains.
Background technology
Traditional power phase protector adopts relay as its final controlling element usually, and relay is a contact switch, and spark, noise problem are arranged, and arranged certain mechanical endurance, and the relay coil driving power is big.Circuit is complicated in the realization, and volume is big, and it is not too convenient to use.
Summary of the invention
The utility model provides a kind of solid-state power source phase sequence relay of novel isolation output to the deficiency of prior art.
The utility model adopts the three-phase line voltage input, and without zero line, output can directly drive the coil of the contactor of break-make three phase mains; Not only can be applied in the three-phase four-wire system; Can also be applied in the three-phase system that does not have neutral point, and the input and output isolation, use flexible, convenient.This protector circuit is simple, and the element size is little, can adopt the epoxy resin embedding to be enclosed in the capsule, solid-state 5 pin element or the modules that are encapsulated as one 3 mouthfuls inputs, 2 mouthfuls of outputs.This protector is to the protection action of three-phase alternating-current supply phase sequence identification, and is contactless, no-spark, and noiselessness, the life-span is long, and is safe and reliable, detects sensitivity, and input voltage range is wide, and versatility is good, and is easy to use.
For realizing above purpose, the technical scheme that the utility model adopts is:
The solid-state power source phase sequence relay of novel isolation output is made up of circuit of testing the phase sequence, bridge rectifier, constant-current drive circuit, isolation zero-cross triggering circuit, five parts of bidirectional thyristor output action circuit; It is characterized in that: input A, B, C triple line; No zero line, output directly drive the contactor coil of AC220V or AC380V.
It is further characterized in that: said circuit of testing the phase sequence adopts RC network to detect phase sequence; Said isolation zero-cross triggering circuit adopts and triggers optocoupler realization isolation zero cross fired; Said constant-current drive circuit adopts triode and diode to realize that constant-current driving triggers optocoupler, can adapt to input A, B, the C three-phase voltage scope of broad.
The beneficial effect of the utility model is that the solid-state power source phase sequence relay of novel isolation output is to the protection action of three-phase alternating-current supply phase sequence identification, and is contactless, no-spark; Noiselessness, the life-span is long, and is safe and reliable, detects sensitive; Input voltage range is wide, and versatility is good, and is easy to use.
Description of drawings
Fig. 1 is the solid-state power source phase sequence relay block diagram of this novel isolation output.
Fig. 2 is the solid-state power source phase sequence relay schematic diagram of this novel isolation output.
Embodiment
As shown in Figure 1, the solid-state power source phase sequence relay of novel isolation output is made up of circuit of testing the phase sequence 1, diode bridge rectifier circuit 2, constant-current drive circuit 3, isolation zero-cross triggering circuit 4, bidirectional thyristor output action circuit 5.Wherein circuit of testing the phase sequence adopts a resistance electric capacity identical with three to realize that phase sequence detects; Constant-current drive circuit adopts the base voltage of two diode pair triodes to carry out clamper, and the emitter resistance current sampling has been realized the collector electrode constant-current driving, and the voltage-stabiliser tube in transistor base loop prevents the misoperation of negative-phase sequence residual voltage; Isolate zero-cross triggering circuit, input and output are isolated, and trigger the break-make of control bidirectional thyristor.
Like Fig. 2; The solid-state power source phase sequence relay input A of novel isolation output, B, C triple line; No zero line; Output directly drives the contactor coil of AC220V or AC380V, and circuit of testing the phase sequence adopts the RC network circuit to realize the detection of phase sequence, through the RC network circuit that R1, C1, C2, C3 constitute three-phase voltage signal is sampled and phase shift; Obtain a sampling and outputting voltage relevant, and convert direct voltage into by rectification circuit and the filter capacitor that diode D1, D2, D3, D4 constitute with phase sequence.Constant-current drive circuit adopts triode N1 and diode D5, D6 to realize that constant-current driving triggers optocoupler; Input A, B, the C three-phase voltage scope that can adapt to broad; The conduction voltage drop that utilizes diode D5, D6 carries out clamper to the base voltage of triode N1, and 2 electric current sample circuits of resistance R feedback effect of N1 emitter is to keep collector current constant; Realize the constant current driven of optocoupler; The drive current of three-phase voltage optocoupler when changing in a big way of detection is remained unchanged basically, and the voltage-stabiliser tube ZD of the base loop of triode is used to offset the negative-phase sequence residual voltage.The zero cross fired optocoupler is isolated input, output, realizes the driving to bidirectional thyristor.Actuating circuit realizes that through bidirectional thyristor TRIAC capacitor C 1 is formed RC with resistance R 7 and absorbed circuit, prevents the thyristor over-voltage breakdown and damages, and has protected thyristor, and resistance R 6 prevents the false triggering of thyristor.L1 is that phase sequence is correct, the indicator light of operate as normal.
When the triple line phase sequence was correct, the voltage of RC network two ends output through rectification, drove optocoupler MOC and triggers bidirectional thyristor TRIAC conducting, outside contactor action adhesive.When triple line phase sequence mistake, RC network two ends output voltage is 0V, and not conducting of optocoupler MOC does not trigger bidirectional thyristor TRIAC conducting, outside not adhesive of contactor, power consumption equipment no power.
Claims (4)
1. the solid-state power source phase sequence relay of novel isolation output is made up of circuit of testing the phase sequence, bridge rectifier, constant-current drive circuit, isolation zero-cross triggering circuit, five parts of bidirectional thyristor output action circuit; It is characterized in that: be an element or a module that adopts 5 pins of solid-state encapsulating structure, input A, B, C triple line, no zero line is isolated the contactor coil that output directly drives AC220V or AC380V.
2. the solid-state power source phase sequence relay of novel isolation output according to claim 1 is characterized in that: said circuit of testing the phase sequence adopts RC network to detect phase sequence.
3. the solid-state power source phase sequence relay of novel isolation output according to claim 1 is characterized in that: said isolation zero-cross triggering circuit adopts and triggers optocoupler realization isolation zero cross fired.
4. the solid-state power source phase sequence relay of novel isolation output according to claim 1; It is characterized in that: said constant-current drive circuit adopts triode and diode to realize that constant-current driving triggers optocoupler, can adapt to input A, B, the C three-phase voltage scope of broad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200052572U CN202513548U (en) | 2012-01-04 | 2012-01-04 | Novel solid-state power source phase sequence protector with output isolation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200052572U CN202513548U (en) | 2012-01-04 | 2012-01-04 | Novel solid-state power source phase sequence protector with output isolation |
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| Publication Number | Publication Date |
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| CN202513548U true CN202513548U (en) | 2012-10-31 |
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| CN2012200052572U Expired - Fee Related CN202513548U (en) | 2012-01-04 | 2012-01-04 | Novel solid-state power source phase sequence protector with output isolation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280816A (en) * | 2013-05-17 | 2013-09-04 | 浙江大学 | Thyristor zero-crossing triggering device based on non-linear sampling |
| CN103412201A (en) * | 2013-08-28 | 2013-11-27 | 徐州徐工施维英机械有限公司 | 1.14kV power grid phase sequence detection device and method |
| CN107132448A (en) * | 2017-03-16 | 2017-09-05 | 珠海格力电器股份有限公司 | Recognition methods, device and system and the storage medium and processor of power supply wiring |
| CN110535094A (en) * | 2019-10-15 | 2019-12-03 | 深圳市伟邦自动化科技有限公司 | Three-phase four-wire system voltage protector and its control method |
| CN112928745A (en) * | 2021-01-25 | 2021-06-08 | 常熟理工学院 | Phase sequence protection circuit based on phase shift principle |
-
2012
- 2012-01-04 CN CN2012200052572U patent/CN202513548U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280816A (en) * | 2013-05-17 | 2013-09-04 | 浙江大学 | Thyristor zero-crossing triggering device based on non-linear sampling |
| CN103412201A (en) * | 2013-08-28 | 2013-11-27 | 徐州徐工施维英机械有限公司 | 1.14kV power grid phase sequence detection device and method |
| CN103412201B (en) * | 2013-08-28 | 2015-11-25 | 徐州徐工施维英机械有限公司 | 1.14kV electrical network detection device for phase sequence and method |
| CN107132448A (en) * | 2017-03-16 | 2017-09-05 | 珠海格力电器股份有限公司 | Recognition methods, device and system and the storage medium and processor of power supply wiring |
| CN107132448B (en) * | 2017-03-16 | 2019-09-20 | 珠海格力电器股份有限公司 | Recognition methods, device and system and the storage medium and processor of power supply wiring |
| CN110535094A (en) * | 2019-10-15 | 2019-12-03 | 深圳市伟邦自动化科技有限公司 | Three-phase four-wire system voltage protector and its control method |
| CN112928745A (en) * | 2021-01-25 | 2021-06-08 | 常熟理工学院 | Phase sequence protection circuit based on phase shift principle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20140104 |