CN103595037A - Three-phase alternating current phase sequence error correction device - Google Patents
Three-phase alternating current phase sequence error correction device Download PDFInfo
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- CN103595037A CN103595037A CN201310497459.2A CN201310497459A CN103595037A CN 103595037 A CN103595037 A CN 103595037A CN 201310497459 A CN201310497459 A CN 201310497459A CN 103595037 A CN103595037 A CN 103595037A
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Abstract
The invention discloses a three-phase alternating current phase sequence error correction device. The three-phase alternating current phase sequence error correction device comprises a single-chip microcomputer, a positive phase sequence circuit and a reverse phase sequence circuit, wherein the positive phase sequence circuit and the reverse phase sequence circuit drive a motor to rotate. A power switch relay KA1 and a phase sequence protector RM1 are arranged on the positive phase sequence circuit. A power switch relay KA2 and a phase sequence protector RM2 are arranged on the reverse phase sequence circuit. The power switch relay KA1 and the power switch relay KA2 are both connected with the single-chip microcomputer. The input ends L1, L2, L3 of the phase sequence protector RM1 are connected with three-phase supply buses A, B, C respectively; the input ends I1, I2, I3 of the phase sequence protector RM2 are connected with the three-phase supply buses C, B, A respectively. The output end of the phase sequence protector RM1 is connected with a three-phase alternating current contactor KM1, and the output end of the phase sequence protector RM2 is connected with a three-phase alternating current contact KM2. The three-phase alternating current phase sequence error correction device can ensure normal operation of equipment no matter whether the phase sequence is correct or not, and the reliability and safety of the whole system are improved.
Description
Technical field
The present invention relates to a kind of three-phase alternating current phase sequence error correction device.
Background technology
Three-phase circuit is that frequency is identical, amplitude is identical, phase place differs the simple sinusoidal electromotive of 120 ° each other as the circuit of power supply by three.Three-phase circuit is because improving power 50% than single phase poaer supply aspect generating, aspect transmission of electricity, than single-phase transmission of electricity, save steel 25%, aspect distribution, three-phase transformer is than single-phase transformer economy and be convenient to access load, fortune have aspect electric equipment simple in structure, cost is low, the advantage such as reliable, easy to maintenance and being applied widely aspect power, is the main supply power mode that current electric power system adopts.Three phase electric equipment has strict requirement to phase sequence, if there is misconnection or other unusual conditions, will cause serious accident, in addition, industrial class application places three-phase is had relatively high expectations, in the situation that misphase appears in phase sequence, also needs to guarantee the normal operation of power consumption equipment.
In the power supply circuits of existing three phase electric equipment, be mostly provided with phase sequence detection module, its operation principle is: when phase sequence occurs after mistake, the built-in phase sequence check-out console of module can cut off circuit input power by control circuit contactor, thereby has avoided the generation of accident.Although circuit input power is cut off, avoided the damage of equipment, but but can not guarantee when misconnection, the normal operation of power consumption equipment, and when there is the faults such as overvoltage, under-voltage, phase shortage and overload, existing three phase electric equipment power supply circuits can not be done out of order alarm, have reduced reliability and the fail safe of system.
As can be seen here, prior art awaits further improving.
Summary of the invention
The present invention is the weak point of avoiding above-mentioned prior art to exist, and a kind of three-phase alternating current phase sequence error correction device is provided.
The technical solution adopted in the present invention is:
Three-phase alternating current phase sequence error correction device, the positive phase sequence circuit and the negative phase sequence circuit that comprise single-chip microcomputer, drive motors running, on described positive phase sequence circuit, be provided with mains switch relay K A1 and phase sequence relay RM1, on described negative phase sequence circuit, be provided with mains switch relay K A2 and phase sequence relay RM2, described mains switch relay K A1 is all connected with single-chip microcomputer with mains switch relay K A2; Input L1, the L2 of described phase sequence relay RM1, L3 are connected with three phase mains bus A, B, C respectively; input I1, the I2 of described phase sequence relay RM2, I3 are connected with three phase mains bus C, B, A respectively; the output of described phase sequence relay RM1 is connected with three-phase ac contactor KM1, and the output of described phase sequence relay RM2 is connected with three-phase ac contactor KM2.
Described phase sequence relay RM1 is all connected with above-mentioned single-chip microcomputer by fault output circuit with phase sequence relay RM2; between described phase sequence relay RM1 and fault output circuit, be provided with the first normally opened contact, between described phase sequence relay RM2 and fault output circuit, be provided with the second normally opened contact.
Described three-phase alternating current phase sequence error correction device also comprises thermal overload relay; the input of the normally-closed contact of described thermal overload relay is connected with the output of the normally-closed contact of three-phase ac contactor KM2 with the output of the normally-closed contact of above-mentioned three-phase ac contactor KM1 respectively, and the normally opened contact of described thermal overload relay is connected with above-mentioned single-chip microcomputer by thermal overload protection signal output apparatus.
In described phase sequence relay RM1, be also provided with the 3rd normally opened contact; the output of described the 3rd normally opened contact is connected with the input of above-mentioned three-phase ac contactor KM1; in described phase sequence relay RM2, be also provided with the 4th normally opened contact, the output of described the 4th normally opened contact is connected with the input of three-phase ac contactor KM2.
The output of described three-phase ac contactor KM1 is connected with the input of the normally-closed contact of three-phase ac contactor KM2, and the output of described three-phase ac contactor KM2 is connected with the input of the normally-closed contact of three-phase ac contactor KM1.
Between described phase sequence relay RM1 and mains switch relay K A1, be provided with fuse FU1, between described phase sequence relay RM2 and mains switch relay K A2, be provided with fuse FU2.
In described single-chip microcomputer, be provided with fault judge module, on described three-phase alternating current phase sequence error correction device, be provided with malfunction indicator lamp or fault alarm, described fault judge module is connected with above-mentioned malfunction indicator lamp or fault alarm by holding wire.
Owing to having adopted technique scheme, the obtained beneficial effect of the present invention is:
1, the present invention feeds back to single-chip microcomputer signal and judges phase sequence state by two phase sequence relay are set; realization all can guarantee the normal operation of equipment when phase sequence is correct and wrong; while there is the faults such as overvoltage, under-voltage, phase shortage, overload, can cut off again circuit simultaneously; protection equipment, thereby the reliability and the fail safe that have improved whole system.
2, the present invention can be widely used in all kinds of drivings, crane, elevator, elevator, winch, belt conveyer, plastic extruding machine, water pumper, automatic shutter etc. the three-phase alternating-current powered equipment of strict demand to phase sequence, also can be directly as the permanent phase sequence power supply control of specific three-phase alternating-current motor.
Accompanying drawing explanation
Fig. 1 is electrical schematic of the present invention.
Fig. 2 is fault-signal output truth table of the present invention.
Wherein,
1, the first normally opened contact 2, the second normally opened contact 3, the 3rd normally opened contact 4, the 4th normally opened contact 5, the normally-closed contact 6 of thermal overload relay, the normally-closed contact 8 of the normally opened contact 7 of thermal overload relay, three-phase ac contactor KM1, the normally opened contact 10 of the normally-closed contact 9 of three-phase ac contactor KM2, three-phase ac contactor KM1 are, the normally opened contact of three-phase ac contactor KM2
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail, but the present invention is not limited to these embodiment.
As shown in Figure 1, three-phase alternating current phase sequence error correction device, comprise single-chip microcomputer, positive phase sequence circuit and the negative phase sequence circuit of drive motors running, on described positive phase sequence circuit, be provided with mains switch relay K A1 and phase sequence relay RM1, between described phase sequence relay RM1 and mains switch relay K A1, be provided with fuse FU1, on described negative phase sequence circuit, be provided with mains switch relay K A2 and phase sequence relay RM2, between described phase sequence relay RM2 and mains switch relay K A2, be provided with fuse FU2, described mains switch relay K A1 is all connected with single-chip microcomputer with mains switch relay K A2, input L1, the L2 of described phase sequence relay RM1, L3 are connected with three phase mains bus A, B, C respectively, input I1, the I2 of described phase sequence relay RM2, I3 are connected with three phase mains bus C, B, A respectively, the output of described phase sequence relay RM1 is connected with three-phase ac contactor KM1, and the output of described phase sequence relay RM2 is connected with three-phase ac contactor KM2.
Described phase sequence relay RM1 is all connected with above-mentioned single-chip microcomputer by fault output circuit with phase sequence relay RM2, between described phase sequence relay RM1 and fault output circuit, be provided with the first normally opened contact 1, between described phase sequence relay RM2 and fault output circuit, be provided with the second normally opened contact 2; In described phase sequence relay RM1, be also provided with the 3rd normally opened contact 3, the output of described the 3rd normally opened contact 3 is connected with the input of above-mentioned three-phase ac contactor KM1, in described phase sequence relay RM2, be also provided with the 4th normally opened contact 4, the output of described the 4th normally opened contact 4 is connected with the input of three-phase ac contactor KM2; The output of described three-phase ac contactor KM1 is connected with the input of the normally-closed contact 8 of three-phase ac contactor KM2, and the output of described three-phase ac contactor KM2 is connected with the input of the normally-closed contact 7 of three-phase ac contactor KM1.
Described three-phase alternating current phase sequence error correction device also comprises thermal overload relay, and the input of the normally-closed contact 5 of described thermal overload relay is connected with the output of normally-closed contact 7 of above-mentioned three-phase ac contactor KM1 and the output of the normally-closed contact 8 of three-phase ac contactor KM2 respectively; The normally opened contact 6 of described thermal overload relay is connected with above-mentioned single-chip microcomputer by thermal overload protection signal output apparatus.
In described single-chip microcomputer, be provided with fault judge module, on described three-phase alternating current phase sequence error correction device, be provided with malfunction indicator lamp or fault alarm, described fault judge module is connected with above-mentioned malfunction indicator lamp or fault alarm by holding wire.
In the present invention, phase sequence relay RM1 normal sequence phase-connecting wire, phase sequence relay RM2 reverse sequence phase-connecting wire; The access of three-phase ac contactor KM1 phase line is identical with output line order, and the access of three-phase ac contactor KM2 phase line is contrary with output line order.When needing the work about electric power of 380v, Single-chip Controlling mains switch relay K A1 and mains switch relay K A2 are closed, the alternating current of 220v are provided to three-phase ac contactor KM1 or KM2.
As shown in Figures 1 and 2, if the order of connection of site of deployment is correct, phase sequence relay RM1 energising, phase sequence relay RM2 no power; The first normally opened contact 1 in phase sequence relay RM1 disconnects, the 3rd normally opened contact 3 closures, the fault output circuit output low level " 0 " being connected with phase sequence relay RM1, the coil electricity of the three-phase ac contactor KM1 being connected with phase sequence relay RM1, normally opened contact 9 closures of three-phase ac contactor KM1, normally-closed contact 10 disconnect, electrical power rotation; The second normally opened contact 2 closures in phase sequence relay RM2, the 4th normally opened contact 4 disconnect, the fault output circuit output high level " 1 " being connected with phase sequence relay RM1, the coil no power of the three-phase ac contactor KM2 being connected with phase sequence relay RM2, the normally opened contact 10 of three-phase ac contactor KM2 disconnects, normally-closed contact 8 closures, the coil of the three-phase ac contactor KM1 conducting of connecting with the normally-closed contact 8 of three-phase ac contactor KM2 and the normally-closed contact 5 of thermal overload relay, realizes three-phase ac contactor KM1 work; Fault judge module in single-chip microcomputer, according to the low and high level of fault output circuit output, draws the normal conclusion of phase sequence, is arranged on malfunction indicator lamp or fault alarm attonity on cross streams phase sequence error correction device.
As shown in Figures 1 and 2, if the order of connection of site of deployment is incorrect, phase sequence relay RM1 no power, phase sequence relay RM2 energising, the first normally opened contact 1 closure in phase sequence relay RM1, the 3rd normally opened contact 3 disconnect, the fault output circuit output high level " 1 " being connected with phase sequence relay RM1, the coil blackout of the three-phase ac contactor KM1 being connected with phase sequence relay RM1, the normally opened contact 9 of three-phase ac contactor KM1 disconnects, normally-closed contact 7 closures, the second normally opened contact 2 in phase sequence relay RM2 disconnects, the 4th normally opened contact 4 closures, the fault output circuit output low level " 0 " being connected with phase sequence relay RM1, the coil electricity of the three-phase ac contactor KM2 being connected with phase sequence relay RM2, normally opened contact 10 closures of three-phase ac contactor KM2, normally-closed contact 8 disconnects, the coil of the three-phase ac contactor KM2 conducting of connecting with the normally-closed contact 7 of three-phase ac contactor KM1 and the normally-closed contact 5 of thermal overload relay, realize three-phase ac contactor KM2 work, because the phase line access of three-phase ac contactor KM2 and the line order of output shift to an earlier date reversal connection, now still can guarantee that motor rotates according to normal direction, fault judge module in single-chip microcomputer, according to the low and high level of fault output circuit output, draws the conclusion of misphase, is arranged on malfunction indicator lamp or fault alarm action on cross streams phase sequence error correction device, makes fault alarm prompting.
As shown in Figures 1 and 2; in three phase mains bus A, B, C during any phase phase shortage; the equal no power of phase sequence relay RM1 and RM2; the second normally opened contact 2 of the first normally opened contact 1 of phase sequence relay RM1 and phase sequence relay RM2 is all closed; the fault output circuit being connected with RM2 with phase sequence relay RM1 is all exported high level " 1 "; fault judge module in single-chip microcomputer is according to the level value of fault output circuit output; draw the conclusion of phase shortage; be arranged on malfunction indicator lamp or fault alarm action on cross streams phase sequence error correction device, make fault alarm prompting.
As shown in Figures 1 and 2; when power-off; mains switch relay K A1 and KA2 are all failure to actuate; positive phase sequence circuit and the equal no current of negative phase sequence circuit pass through; the equal output low level of fault output circuit " 0 " being connected with RM2 with phase sequence relay RM1, the fault judge module in single-chip microcomputer, according to the level value of fault output circuit output, draws and occurs abnormal conclusion; be arranged on malfunction indicator lamp or fault alarm action on cross streams phase sequence error correction device, make fault alarm prompting.
As shown in Figures 1 and 2, when motor overload acquires a certain degree, the normally-closed contact 5 of thermal overload relay disconnects, and has cut off the operating circuit of three-phase ac contactor KM1 and KM2, and then has disconnected power supply, motor stalling; Meanwhile; normally opened contact 6 closures of thermal overload relay; overload protection signal transfers to single-chip microcomputer by thermal overload protection signal output apparatus; single-chip microcomputer will transfer to cross streams phase sequence error correction device after this signal integration; trigger malfunction indicator lamp or fault alarm action on it, make fault alarm prompting.
The present invention has constant phase order of 3-phase AC output; not only simply but also reliable; also possess misphase, phase shortage, abnormal, overload protection function simultaneously; thereby can be widely used in all kinds of drivings, crane, elevator, elevator, winch, belt conveyer, plastic extruding machine, water pumper, automatic shutter etc. and phase sequence is had to the three-phase alternating-current powered equipment of strict demand
The part that the present invention does not address, adopts or uses for reference prior art and can realize.
In addition, term " first ", " second ", " the 3rd " and " the 4th " be only for describing object, and can not be interpreted as indication or hint relative importance.
Although more use herein such as the first normally opened contact 1, the second normally opened contact 2, the normally opened contact 6 of thermal overload relay, the possibility of using other term do not got rid of in the terms such as normally-closed contact 8 of three-phase ac contactor KM2.Use these terms to be only used to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all contrary with spirit of the present invention.
Need to further illustrate, specific embodiment described herein is only to spiritual example explanation of the present invention.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (7)
1. three-phase alternating current phase sequence error correction device, it is characterized in that: the positive phase sequence circuit and the negative phase sequence circuit that comprise single-chip microcomputer, drive motors running, on described positive phase sequence circuit, be provided with mains switch relay K A1 and phase sequence relay RM1, on described negative phase sequence circuit, be provided with mains switch relay K A2 and phase sequence relay RM2, described mains switch relay K A1 is all connected with single-chip microcomputer with mains switch relay K A2; Input L1, the L2 of described phase sequence relay RM1, L3 are connected with three phase mains bus A, B, C respectively; input I1, the I2 of described phase sequence relay RM2, I3 are connected with three phase mains bus C, B, A respectively; the output of described phase sequence relay RM1 is connected with three-phase ac contactor KM1, and the output of described phase sequence relay RM2 is connected with three-phase ac contactor KM2.
2. three-phase alternating current phase sequence error correction device according to claim 1; it is characterized in that: described phase sequence relay RM1 is all connected with above-mentioned single-chip microcomputer by fault output circuit with phase sequence relay RM2; between described phase sequence relay RM1 and fault output circuit, be provided with the first normally opened contact, between described phase sequence relay RM2 and fault output circuit, be provided with the second normally opened contact.
3. three-phase alternating current phase sequence error correction device according to claim 1; it is characterized in that: described three-phase alternating current phase sequence error correction device also comprises thermal overload relay; the input of the normally-closed contact of described thermal overload relay is connected with the output of the normally-closed contact of three-phase ac contactor KM2 with the output of the normally-closed contact of above-mentioned three-phase ac contactor KM1 respectively, and the normally opened contact of described thermal overload relay is connected with above-mentioned single-chip microcomputer by thermal overload protection signal output apparatus.
4. three-phase alternating current phase sequence error correction device according to claim 2; it is characterized in that: in described phase sequence relay RM1, be also provided with the 3rd normally opened contact; the output of described the 3rd normally opened contact is connected with the input of above-mentioned three-phase ac contactor KM1; in described phase sequence relay RM2, be also provided with the 4th normally opened contact, the output of described the 4th normally opened contact is connected with the input of three-phase ac contactor KM2.
5. three-phase alternating current phase sequence error correction device according to claim 4, it is characterized in that: the output of described three-phase ac contactor KM1 is connected with the input of the normally-closed contact of three-phase ac contactor KM2, the output of described three-phase ac contactor KM2 is connected with the input of the normally-closed contact of three-phase ac contactor KM1.
6. three-phase alternating current phase sequence error correction device according to claim 1; it is characterized in that: between described phase sequence relay RM1 and mains switch relay K A1, be provided with fuse FU1, between described phase sequence relay RM2 and mains switch relay K A2, be provided with fuse FU2.
7. according to the three-phase alternating current phase sequence error correction device described in claim 1 to 6 any one claim, it is characterized in that: in described single-chip microcomputer, be provided with fault judge module, on described three-phase alternating current phase sequence error correction device, be provided with malfunction indicator lamp or fault alarm, described fault judge module is connected with above-mentioned malfunction indicator lamp or fault alarm by holding wire.
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Cited By (7)
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| CN104062513A (en) * | 2014-05-20 | 2014-09-24 | 东南大学 | Secondary phase detecting instrument and method |
| CN104158148A (en) * | 2014-07-31 | 2014-11-19 | 国家电网公司 | Autocorrelation and phase failure protection device for phase sequence of three-phase power source of plate type oil filter machine |
| CN105334475A (en) * | 2015-11-17 | 2016-02-17 | 珠海格力电器股份有限公司 | Three-phase unit control circuit and reverse phase protection state detection method thereof |
| CN107329008A (en) * | 2017-07-03 | 2017-11-07 | 广东电网有限责任公司茂名供电局 | A kind of circuit of testing the phase sequence |
| CN109659932A (en) * | 2018-12-19 | 2019-04-19 | 军事科学院系统工程研究院卫勤保障技术研究所 | Three-phrase burden balance formula electric power safeguard system and method for field tent hospital |
| CN110398639A (en) * | 2019-08-12 | 2019-11-01 | 合肥天鹅制冷科技有限公司 | A kind of three-phase alternating current adjust automatically detection circuit |
| CN113586413A (en) * | 2021-07-26 | 2021-11-02 | 深圳供电局有限公司 | Water pump control method and device, water pump station and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104062513A (en) * | 2014-05-20 | 2014-09-24 | 东南大学 | Secondary phase detecting instrument and method |
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| CN109659932A (en) * | 2018-12-19 | 2019-04-19 | 军事科学院系统工程研究院卫勤保障技术研究所 | Three-phrase burden balance formula electric power safeguard system and method for field tent hospital |
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| CN110398639A (en) * | 2019-08-12 | 2019-11-01 | 合肥天鹅制冷科技有限公司 | A kind of three-phase alternating current adjust automatically detection circuit |
| CN113586413A (en) * | 2021-07-26 | 2021-11-02 | 深圳供电局有限公司 | Water pump control method and device, water pump station and storage medium |
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| CN103595037B (en) | 2016-05-25 |
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