CN200990498Y - Three-phase power supply phase-sequence detection and open-phase protection circuit - Google Patents
Three-phase power supply phase-sequence detection and open-phase protection circuit Download PDFInfo
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- CN200990498Y CN200990498Y CN 200620045859 CN200620045859U CN200990498Y CN 200990498 Y CN200990498 Y CN 200990498Y CN 200620045859 CN200620045859 CN 200620045859 CN 200620045859 U CN200620045859 U CN 200620045859U CN 200990498 Y CN200990498 Y CN 200990498Y
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- power supply
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Abstract
The utility model discloses a three phase power source phase sequence detecting and open-phase protection circuit and comprises three phase circuit processing signal, amplified signal and triggering signal. The three phase circuit signal processing circuit is a three phase power source of B, A and C that are semi wave rectification through diodes D1, D2 and D3 and then the are attenuation through resistances R1, R2 and R3, the clipping of the voltage regulation circuit composed of voltage regulation tubes of D4, D5 and D6 and the resistances of R4, R5 and R6, and finally sent to the digital integration of IC. A rectangular shape negative impulse with the width of 3 ms (50 circles alternating current) is output; the front edge of the rectangular negative impulse is synchronized with the zero crossing point of the B phase sine wave. The negative impulse is triggered by the amplified circuit to trigger circuit to control three phase load. If the phase sequence is wrong of the phase is open, the dual direction controllable silicone S C R is not opened, the load end is electroless, so as to avoid fault.
Description
Technical field
The utility model relates to a kind of three phase mains open-phase protection circuit
Background technology
At present, open-phase protection circuit is widely used in the power technology field and the industrial control automation field of three phase mains.But general open-phase protection circuit lacks the phase sequence detection technique, because the phase sequence problem can cause a lot of equipment faults and accident.
Summary of the invention
The utility model provides a kind of circuit, can realize that three-phase power supply phase sequence detects and the open-phase protection circuit function.
In order to achieve the above object; the technical scheme that the utility model adopted is: a kind of three-phase power supply phase sequence detects and open-phase protection circuit; comprise the three-phase circuit processing signals; amplifying circuit and circuits for triggering; wherein the three-phase circuit signal processing circuit is three phase mains B; A; the C three-phase is respectively through diode D1; D2; the D3 halfwave rectifier; again through resistance R 1; R2; the R3 decay; by by voltage-stabiliser tube D4; D5; D6 and resistance R 4; R5; output is near the pulse signal of rectangle behind the voltage stabilizing circuit slicing that R6 forms; deliver to digital integrated IC, export the rectangle negative pulse of an about 3ms of width (50 all alternating currents).Negative pulse triggers circuits for triggering control threephase load through amplifying circuit.Circuits for triggering are that relay M and bidirectional triode thyristor SCR are connected in series between B phase and the N phase, and relay M controls threephase load, and the trigger end of bidirectional triode thyristor SCR comes from amplifying circuit output.If the wrong phase sequence or the phase failure, bidirectional triode thyristor SCR all can not open, and load end will not have electricity, avoid fault, play a protective role.
Description of drawings
Fig. 1 is that the utility model three-phase power supply phase sequence detects and open-phase protection circuit.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described
Detect and open-phase protection circuit for the utility model three-phase power supply phase sequence as Fig. 1; divide the three-phase signal treatment circuit: three phase mains B, A, C three-phase are respectively through diode D1, D2, D3 halfwave rectifier; again through resistance R 1, resistance R 2, resistance R 3 decay; by exporting pulse signal behind the voltage stabilizing circuit slicing of forming by voltage-stabiliser tube D4, D5, D6 and resistance R 4, R5, R6 near rectangle; deliver to the digital integrated IC that forms by U4, U2, U1, U3, for example (4-2 input NAND gate CD4011).A road signal and C road signal are exported F1 behind U1.A road signal, F1 and U2, U3 output+Q ,-rest-set flip-flop that Q constitutes, from+output of Q end is added to the U4 input with B road signal again, from U4 output F4, is the rectangle negative pulse of an about 3ms of width (50 all alternating currents) at last.
Amplifying circuit: the forward position of rectangle negative pulse is just in time synchronous with the mutually sinusoidal wave zero crossing of B.Negative pulse is amplified via the amplifying circuit that triode Q1, Q2, the thick R8 of electricity form, and B phase power supply is connected to the emitter of Q1 by transformer T and rectifier bridge D7.
Circuits for triggering: amplifying signal is connected to bidirectional triode thyristor SCR trigger end by resistance R 7, relay M and bidirectional triode thyristor SCR are connected in series between B phase and the N phase, relay M controls threephase load, if the wrong phase sequence or the phase failure, bidirectional triode thyristor SCR all can not open, load end will not have electricity, avoid fault.
Claims (2)
1; a kind of three-phase power supply phase sequence detects and open-phase protection circuit; comprise the three-phase circuit signal processing circuit; amplifying circuit and circuits for triggering; it is characterized in that the three-phase circuit signal processing circuit is three phase mains (B; A; C) the input three-phase electricity is respectively through diode (D1; D2; D3) halfwave rectifier; again through resistance (R1; R2; R3) decay; by by voltage-stabiliser tube (D4; D5; D6) with resistance (R4; R5; R6) behind the voltage stabilizing circuit slicing of Zu Chenging output near the pulse signal of rectangle; deliver to digital integrated IC; export an about 3ms of width; the rectangle negative pulse of 50HZ; the forward position of rectangle negative pulse just in time with three phase mains in (B) mutually sinusoidal wave zero crossing synchronous, negative pulse triggers circuits for triggering control threephase load through amplifying circuit.
2, detect and open-phase protection circuit according to the described three-phase power supply phase sequence of claim 1; it is characterized in that circuits for triggering are that relay (M) and bidirectional triode thyristor (SCR) are connected in series in (B) mutually and (N) between the phase; relay (M) control threephase load, the trigger end of bidirectional triode thyristor (SCR) comes from amplifying circuit output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620045859 CN200990498Y (en) | 2006-09-15 | 2006-09-15 | Three-phase power supply phase-sequence detection and open-phase protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620045859 CN200990498Y (en) | 2006-09-15 | 2006-09-15 | Three-phase power supply phase-sequence detection and open-phase protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200990498Y true CN200990498Y (en) | 2007-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620045859 Expired - Fee Related CN200990498Y (en) | 2006-09-15 | 2006-09-15 | Three-phase power supply phase-sequence detection and open-phase protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200990498Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871982A (en) * | 2010-06-01 | 2010-10-27 | 佛山市中格威电子有限公司 | Method and circuit for detecting phase sequence and asymmetrical voltage of three phase current |
| CN101718843B (en) * | 2009-12-09 | 2012-05-02 | 电子科技大学 | Stator winding phase sequence, corresponding relation determining method of stator winding phase sequence and coder, and device |
| CN102944760A (en) * | 2012-10-17 | 2013-02-27 | 中色科技股份有限公司 | Simple and easy phase sequence test method of three-phase alternating current |
| CN103595013A (en) * | 2013-11-20 | 2014-02-19 | 南通三信塑胶装备科技有限公司 | Power supply source fault-phase and default-phase protective circuit of corona processor |
| CN105356416A (en) * | 2015-12-09 | 2016-02-24 | 上海辰竹仪表有限公司 | Three-phase alternating voltage phase sequence monitoring system |
| CN107607884A (en) * | 2017-10-23 | 2018-01-19 | 成都旭思特科技有限公司 | Power sector to active filter power supply |
-
2006
- 2006-09-15 CN CN 200620045859 patent/CN200990498Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718843B (en) * | 2009-12-09 | 2012-05-02 | 电子科技大学 | Stator winding phase sequence, corresponding relation determining method of stator winding phase sequence and coder, and device |
| CN101871982A (en) * | 2010-06-01 | 2010-10-27 | 佛山市中格威电子有限公司 | Method and circuit for detecting phase sequence and asymmetrical voltage of three phase current |
| CN102944760A (en) * | 2012-10-17 | 2013-02-27 | 中色科技股份有限公司 | Simple and easy phase sequence test method of three-phase alternating current |
| CN103595013A (en) * | 2013-11-20 | 2014-02-19 | 南通三信塑胶装备科技有限公司 | Power supply source fault-phase and default-phase protective circuit of corona processor |
| CN103595013B (en) * | 2013-11-20 | 2017-05-17 | 南通三信塑胶装备科技股份有限公司 | Power supply source fault-phase and default-phase protective circuit of corona processor |
| CN105356416A (en) * | 2015-12-09 | 2016-02-24 | 上海辰竹仪表有限公司 | Three-phase alternating voltage phase sequence monitoring system |
| CN105356416B (en) * | 2015-12-09 | 2017-11-03 | 上海辰竹仪表有限公司 | A kind of three-phase alternating voltage phase sequence monitoring system |
| CN107607884A (en) * | 2017-10-23 | 2018-01-19 | 成都旭思特科技有限公司 | Power sector to active filter power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |