CN201893739U - Three-phase alternating-current motor phase-sequence recognizer - Google Patents
Three-phase alternating-current motor phase-sequence recognizer Download PDFInfo
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- CN201893739U CN201893739U CN2010205472398U CN201020547239U CN201893739U CN 201893739 U CN201893739 U CN 201893739U CN 2010205472398 U CN2010205472398 U CN 2010205472398U CN 201020547239 U CN201020547239 U CN 201020547239U CN 201893739 U CN201893739 U CN 201893739U
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- 238000012360 testing method Methods 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract 3
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- 230000001070 adhesive effect Effects 0.000 description 6
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 229920004933 Terylene® Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a three-phase alternating-current motor phase-sequence recognizer, which belongs to the technical field of motor phase-sequence and solves the problem that existing recognizers are incapable of changing power source phase-sequence automatically when the power source phase-sequence is uncorrected. The three-phase alternating-current motor phase-sequence recognizer comprises a phase-sequence detection circuit, a sampling control circuit and a direct-current voltage stabilizing circuit, a sampling control circuit is connected with the direct-current voltage stabilizing circuit, a phase-sequence detection circuit and a three-phase alternating-current motor, and the phase-sequence detection circuit is capable of judging whether the phase sequence of the three-phase alternating-current power source is correct or not and making a judgment result. Besides, the phase-sequence recognizer further comprises an automatic phase changing circuit connected with a three-phase input end of the three-phase alternating-current motor, the automatic phase changing circuit is connected with the direct-current voltage stabilizing circuit and the sampling control circuit, and the sampling control circuit is capable of acquiring the judgment result and controlling start and stop of operation of the automatic phase changing circuit according to the judgment result. The three-phase alternating-current motor phase-sequence recognizer has the advantages of not only being capable of recognizing power source phase-sequence but correcting error phase sequence.
Description
Technical field
The utility model belongs to motor phase sequence technical field, relates to a kind of three phase alternating current motor phase sequence identifying instrument.
Background technology
Turning to of three phase alternating current motor when operation is that phase sequence by to the three-phase alternating-current supply of its power supply decides.Will reverse if wherein two phase sequences in its three-phase alternating-current supply are changed turning to of its three phase alternating current motor of back, thereby not only influence the operate as normal of three phase alternating current motor, security incident takes place sometimes.
At present in the overwhelming majority's three phase alternating current motor is used, generally be when equipment debugging, the three-phase phase-sequence of motor power inlet wire to be adjusted to satisfy the state that equipment operation requires, and when equipment normally moves, if when its phase sequence of power supply three-phase alternating-current supply that inserts changes, then can not discern the variation of three-phase alternating-current supply phase sequence usually.At present people have and invent out a kind of phase sequence identifying instrument that can distinguish whether power phase changes, distinguish that in order to the test before the three phase alternating current motor operation manual adjustment power phase is so that its power phase satisfies service requirement then.But when needs were adjusted power phase, this identifying instrument can not change the phase sequence of power supply automatically, can only adjust the motor participation work that allows again by manual advanced person's row before motor moves, and inefficiency and suitable the trouble are especially for the motor that is operated in the transformer oil pump.
Summary of the invention
The purpose of this utility model is to have the problems referred to above at existing technology, has proposed a kind ofly can whether satisfy that the motor demand is distinguished and can adjust its phase sequence automatically to satisfy the three phase alternating current motor phase sequence identifying instrument of motor demand when needs are adjusted the three-phase alternating-current supply phase sequence to the phase sequence of three-phase alternating-current supply.
The purpose of this utility model can realize by following technical proposal: a kind of three phase alternating current motor phase sequence identifying instrument, be connected between three-phase alternating-current supply and the three phase alternating current motor, comprise circuit of testing the phase sequence, sampling control circuit and the direct current regulation circuit that connects with three-phase alternating-current supply, described sampling control circuit and above-mentioned direct current regulation circuit, circuit of testing the phase sequence and three phase alternating current motor connect, whether above-mentioned circuit of testing the phase sequence connects the three-phase output end of three-phase alternating-current supply and can correctly judge and produce judged result the phase sequence of three-phase alternating-current supply, it is characterized in that: this phase sequence identifying instrument also comprises the automatic commutation circuit that connects with the three-phase input end of three phase alternating current motor, described automatic commutation circuit connects with above-mentioned direct current regulation circuit and sampling control circuit respectively, and the work that described sampling control circuit can obtain above-mentioned judged result and control automatic commutation circuit according to its judged result whether.
Direct current regulation circuit with the three-phase alternating-current supply step-down rectifier after for the sampling control circuit and automatically commutation circuit constant voltage dc source is provided.After starting this phase sequence identifying instrument, its circuit of testing the phase sequence detects judgement to the phase sequence of three-phase alternating-current supply, if phase sequence when correct (forward), the control circuit of then taking a sample is controlled automatic commutation circuit and do not worked, the running of three phase alternating current motor forward; If during phase sequence incorrect (reverse), the control circuit of then taking a sample control automatic commutation circuit unlatching work carry out to power phase automatically transposing to make the three-phase alternating-current supply phase sequence that is input on the three phase alternating current motor be correct phase sequence, this moment, three phase alternating current motor also was the forward running, when preventing three-phase alternating-current supply phase sequence mistake (reverse), thereby the three phase alternating current motor counter-rotating influences the operate as normal of three phase alternating current motor.
In above-mentioned a kind of three phase alternating current motor phase sequence identifying instrument, described circuit of testing the phase sequence is made up of capacitor C 3, resistor R 1, resistor R 2, resistor R 3 and indicator light NHI-IB, one end of one end of capacitor C 3, an end of resistor R 1 and resistor R 3 links with three of three-phase alternating-current supply respectively, indicator light NHI-IB is in parallel with resistor R 3, one end of the other end of resistor R 3 and resistor R 2 connects, and resistor R 2 other ends connect with star connection with the other end of resistor R 1 and the other end of capacitor C3.
Circuit of testing the phase sequence is formed star connection to three different components and parts, be connected with the triple line of three-phase alternating-current supply, when the phase sequence of three-phase alternating-current supply is correct (forward), then indicator light NHI-IB is luminous, if during the phase sequence mistake (reverse), then indicator light NHI-IB is not luminous.Judge by checking that indicator light NHI-IB is whether luminous whether the three-phase alternating-current supply phase sequence connects correct.
In above-mentioned a kind of three phase alternating current motor phase sequence identifying instrument, described sampling control circuit comprises photo-resistor RG, potentiometer RP1, transistor V, relay K 1, diode VD1, resistance R 5, light-emitting diode VL1 and A.C. contactor KM1, in parallel with relay K 1 and diode VD1 again after resistance R 5 and the light-emitting diode VL1 series connection, one end of relay K 1 connects with direct current regulation circuit, the other end connects with the collector electrode of transistor V, the end of the normally-closed contact K1-1 corresponding with relay device K1 connects direct current regulation circuit, the other end of normally-closed contact K1-1 connects automatic commutation circuit, the end of photo-resistor RG connects direct current regulation circuit, the other end of photo-resistor RG connects the end of potentiometer RP1 and the base stage of transistor V, the emitter of the other end of potentiometer RP1 and transistor V all connects with automatic commutation circuit, is connected between the two-phase of three-phase alternating-current supply after normally opened contact K1-2 corresponding with relay K 1 and A.C. contactor KM1 connect.
When indicator light NHI-IB was luminous, photo-resistor RG was low resistive state; When indicator light NHI-IB was not luminous, photo-resistor RG was high-impedance state.Thereby the sampling control circuit carries out perception and obtains the judged result of circuit of testing the phase sequence to the three-phase alternating-current supply phase sequence whether luminous indicator light NHI-IB is by photo-resistor RG, when the three-phase alternating-current supply phase sequence is correct (forward), photo-resistor RG is low resistive state, the sampling control circuit is controlled automatic commutation circuit and is not worked, the phase sequence of three-phase alternating-current supply do not adjusted directly supply with three phase alternating current motor, three phase alternating current motor forward running this moment; When three-phase alternating-current supply phase sequence mistake (reverse), photo-resistor RG is high-impedance state, the sampling control circuit is controlled automatic commutation circuit work, wherein two phase sequences to three-phase alternating-current supply are changed, three-phase alternating-current supply phase sequence after will changing then offers three phase alternating current motor, and this moment, three phase alternating current motor also was the forward running.
In above-mentioned a kind of three phase alternating current motor phase sequence identifying instrument, described direct current regulation circuit is by fuse FU1, power transformer T, rectifier bridge heap Vc, filter capacitor C1, filter capacitor C2 and circuit of three-terminal voltage-stabilizing integrated IC1 form, the end of fuse FU1 connects a phase of three-phase alternating-current supply, one end of the other end joining power transformer T primary coil of fuse FU1, the other end of power transformer T primary coil connects another phase of three-phase alternating-current supply, the two ends of the secondary coil of power transformer T connect two inputs of rectifier bridge heap Vc, two outputs, the one end ground connection of rectifier bridge heap Vc, the other end connects the input of filter capacitor C1 and circuit of three-terminal voltage-stabilizing integrated IC1, the output of circuit of three-terminal voltage-stabilizing integrated IC1 connects filter capacitor C2 and sampling control circuit, the other end of filter capacitor C1, the equal ground connection of the other end of the circuit of three-terminal voltage-stabilizing integrated IC1 other end and filter capacitor C2.
Direct current regulation circuit is connected between the phase line A phase and N phase of three-phase alternating-current supply, alternating voltage between A phase and the N phase through power transformer T step-down Vc rectification, is produced operating voltage Vcc and offers sampling control circuit and automatic commutation circuit use after C1, C2 filtering and the IC1 voltage stabilizing.
In above-mentioned a kind of three phase alternating current motor phase sequence identifying instrument, described automatic commutation circuit is by time-base integrated circuit IC2, resistance R 4, resistance R 6, relay K 2, relay K 3, potentiometer RP2, diode VD2, diode VD3, light-emitting diode VL2, capacitor C4, capacitor C5 and A.C. contactor KM2 form, one end of resistance R 6 connects with 4 pin of time-base integrated circuit IC2, the other end of resistance R 6 connects with an end of relay K 3, the other end ground connection of relay K 3, potentiometer RP2 is in parallel with diode VD2, the end of diode VD2 connects with 4 pin of time-base integrated circuit IC2,6 pin of the other end of diode VD2 and time-base integrated circuit IC2,2 pin connect, capacitor C4 one end connects with 2 pin of time-base integrated circuit IC2, the other end ground connection of capacitor C4, normally-closed contact K3 and the capacitor C4 parallel connection corresponding with relay K 3,4 pin of time-base integrated circuit IC2,8 pin all connect with direct current regulation circuit, in parallel with diode VD3 and relay K 2 again after resistance R 4 and the light-emitting diode VL2 series connection, the end of diode VD3 connects with 4 pin of time-base integrated circuit IC2, the other end of diode VD3 connects with 3 pin of time-base integrated circuit IC2, the 1 pin ground connection of time-base integrated circuit IC2,5 pin of time-base integrated circuit IC2 connect the end of capacitor C5, the other end ground connection of capacitor C5 is connected between the two-phase of three-phase alternating-current supply after normally opened contact K2 corresponding with relay K 2 and the A.C. contactor KM2 series connection.
When automatic commutation circuit startup work, make A.C. contactor KM2 energising adhesive, change power phase automatically, the running of three phase alternating current motor forward.
Compared with prior art, this three phase alternating current motor phase sequence identifying instrument not only has to be distinguished the correctness of the three-phase alternating-current supply phase sequence that inserts three phase alternating current motor, simultaneously when the three-phase alternating-current supply phase sequence insert when incorrect can by automatic commutation circuit automatically transposing be linked in the three phase alternating current motor again after correct, make its phase sequence of three-phase alternating-current supply no matter correctness all can guarantee the running of three phase alternating current motor forward, thereby ensured the operate as normal of three phase alternating current motor.Simultaneously, this three phase alternating current motor phase sequence identifying instrument principle is simple, can distinguish exactly and adjustment automatically.
Description of drawings
Fig. 1 is a theory structure block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
Present embodiment is the three phase alternating current motor phase sequence identifying instrument that is applied on the transformer oil pump, have 3 binding posts on the transformer oil pump outlet box place terminal block, its medial extremity is respectively A, B, C and outboard end U, V, W is corresponding, the A of medial extremity, B, C are connected with the wire-wound group of three phase alternating current motor, outboard end U, V, W are connected with outside three-phase alternating-current supply, and the three phase alternating current motor phase sequence identifying instrument in the present embodiment is connected between outboard end U, V, W and the outside three-phase alternating-current supply.
As illustrated in fig. 1 and 2, the direct current regulation circuit that the three phase alternating current motor phase sequence identifying instrument of present embodiment comprises star connection and the circuit of testing the phase sequence that is connected with outside three-phase alternating-current supply triple line, be connected with N with the phase line A of outside three-phase alternating-current supply, sampling control circuit and commutation circuit automatically, the sampling control circuit is with direct current regulation circuit, circuit of testing the phase sequence, commutation circuit is connected with outboard end U, V, W automatically, and commutation circuit is connected with outboard end U, V, W with direct current regulation circuit automatically.
Circuit of testing the phase sequence is made up of capacitor C 3, resistor R 1, resistor R 2, resistor R 3 and indicator light NHI-IB.
The sampling control circuit comprises photo-resistor RG, potentiometer RP1, transistor V, relay K 1, diode VD1, resistance R 5, light-emitting diode VL1 and A.C. contactor KM1.A.C. contactor KM1 also connects with normally open contact K1-2.
Direct current regulation circuit is made up of fuse FU1, power transformer T, rectifier bridge heap Vc, filter capacitor C1, filter capacitor C2 and circuit of three-terminal voltage-stabilizing integrated IC1.Direct current regulation circuit is connected between the phase line A phase and N phase of three-phase alternating-current supply, through power transformer T step-down Vc rectification, generation+12V operating voltage offers sampling control circuit and commutation circuit use automatically after C1, C2 filtering and the IC1 voltage stabilizing with the alternating current 220V voltage between A phase and the N phase.
Automatically commutation circuit is made up of time-base integrated circuit IC2, resistance R 4, resistance R 6, relay K 2, relay K 3, potentiometer RP2, diode VD2, diode VD3, light-emitting diode VL2, capacitor C4, capacitor C5 and A.C. contactor KM2.Direct current regulation circuit can provide by normally closed interlock K1-1+and the 12V operating voltage is to automatic commutation circuit.
The operation principle of this three phase alternating current motor phase sequence identifying instrument is as follows:
In the phase sequence of three-phase alternating-current supply when correct (forward), indicator light NHI-IB is luminous, and photo-resistor RG is subjected to illumination to be low resistive state, transistor V saturation conduction, light-emitting diode VL1 is luminous, relay K 1 adhesive, the normally closed interlock of its normally closed interlock K1-1 and normally open contact K1-2 disconnects, and normally open contact is connected, A.C. contactor KM1 adhesive, the running of three phase alternating current motor M forward, the working power of commutation circuit is cut off by normally closed interlock K1-1 automatically simultaneously, and commutation circuit is not worked automatically.
If during three-phase alternating-current supply phase sequence mistake (reverse), indicator light NHI-IB is not luminous, photo-resistor RG is high-impedance state, transistor V ends, relay K 1 and A.C. contactor KM1 all are in release condition, + 12V voltage is supplied with automatic commutation circuit through the normally closed interlock of normally closed contact K1-1, make relay K 3 adhesives, its normally closed interlock disconnects, simultaneously+12V voltage passes through potentiometer RP2 to begin to charge to delay capacitor C4, make 2 pin of time-base integrated circuit IC2,6 pin voltages constantly raise, and delay time about about 3-10s, when this voltage rises to 2Vcc/3 (Vcc is the voltage that offers time-base integrated circuit IC2 work), circuit upset in the time-base integrated circuit IC2, its 3 pin becomes low level by high level, and light-emitting diode VL2 is lighted, relay K 2 adhesives, its normally open contact is connected, make A.C. contactor KM2 energising adhesive, change power phase automatically, the running of three phase alternating current motor M forward.
The resistance of regulator potentiometer RP1 can change sampling voltage, the sensitivity of regulating relay K1 action; The resistance of regulator potentiometer RP2 can change time of relay K 2 deferred actions, that is to say and reverse to the clockwise time that this circuit design is 3-10s.
The concrete selection of above-mentioned each components and parts is as follows:
R1, R2, R3, R4, R5 all select the 1/4W fixed carbon resister for use, R6 1/2W resistor; RG selects MG45 series photo-resistor for use; C1, C2, C4 select withstand voltage 25V alminium electrolytic condenser for use, and C3 selects the dacron terylene condenser of withstand voltage 400V for use, and C5 selects leaded multilayer ceramic capacitor for use; VD1, VD2, VD3 all select 1N4007 type silicon diode for use; VL1 and VL2 select Φ 5 light-emitting diodes for use, and VL1 is green, and VL2 is red; Vc selects the silicon rectification bridge heap of 1-2A, 50V for use; V selects S8050 type PNP transistor for use; IC1 selects the LM7812 circuit of three-terminal voltage-stabilizing integrated for use, and IC2 selects NE555 type time-base integrated circuit for use; K1, K2, K3 select the 12V direct current relay for use; NHI-IB selects the neon bulb indicator light for use; It is the miniature transformer of 16V that T selects 3-5A, secondary voltage for use.
This three phase alternating current motor phase sequence identifying instrument can make its phase sequence that inserts three phase alternating current motor of three-phase alternating-current supply can both guarantee the running of three phase alternating current motor forward regardless of correctness, thereby guarantee that fuel pump impeller reversal development can not occur in the course of the work, ensured the operate as normal of oil pump.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (5)
1. three phase alternating current motor phase sequence identifying instrument, be connected between three-phase alternating-current supply and the three phase alternating current motor, comprise circuit of testing the phase sequence, sampling control circuit and the direct current regulation circuit that connects with three-phase alternating-current supply, described sampling control circuit and above-mentioned direct current regulation circuit, circuit of testing the phase sequence and three phase alternating current motor connect, above-mentioned circuit of testing the phase sequence connects the three-phase output end of three-phase alternating-current supply, it is characterized in that: this phase sequence identifying instrument also comprises the automatic commutation circuit that connects with the three-phase input end of three phase alternating current motor, and described automatic commutation circuit connects with above-mentioned direct current regulation circuit and sampling control circuit respectively.
2. a kind of three phase alternating current motor phase sequence identifying instrument according to claim 1, it is characterized in that, described circuit of testing the phase sequence is made up of capacitor C 3, resistor R 1, resistor R 2, resistor R 3 and indicator light NHI-IB, one end of one end of capacitor C 3, an end of resistor R 1 and resistor R 3 links with three of three-phase alternating-current supply respectively, indicator light NHI-IB is in parallel with resistor R 3, one end of the other end of resistor R 3 and resistor R 2 connects, and resistor R 2 other ends connect with star connection with the other end of resistor R 1 and the other end of capacitor C3.
3. a kind of three phase alternating current motor phase sequence identifying instrument according to claim 2, it is characterized in that, described sampling control circuit comprises photo-resistor RG, potentiometer RP1, transistor V, relay K 1, diode VD1, resistance R 5, light-emitting diode VL1 and A.C. contactor KM1, in parallel with relay K 1 and diode VD1 again after resistance R 5 and the light-emitting diode VL1 series connection, one end of relay K 1 connects with direct current regulation circuit, the other end connects with the collector electrode of transistor V, the end of the normally-closed contact K1-1 corresponding with relay device K1 connects direct current regulation circuit, the other end of normally-closed contact K1-1 connects automatic commutation circuit, the end of photo-resistor RG connects direct current regulation circuit, the other end of photo-resistor RG connects the end of potentiometer RP1 and the base stage of transistor V, the emitter of the other end of potentiometer RP1 and transistor V all connects with automatic commutation circuit, is connected between the two-phase of three-phase alternating-current supply after normally opened contact K1-2 corresponding with relay K 1 and A.C. contactor KM1 connect.
4. a kind of three phase alternating current motor phase sequence identifying instrument according to claim 3, it is characterized in that, described direct current regulation circuit is by fuse FU1, power transformer T, rectifier bridge heap Vc, filter capacitor C1, filter capacitor C2 and circuit of three-terminal voltage-stabilizing integrated IC1 form, the end of fuse FU1 connects a phase of three-phase alternating-current supply, one end of the other end joining power transformer T primary coil of fuse FU1, the other end of power transformer T primary coil connects another phase of three-phase alternating-current supply, the two ends of the secondary coil of power transformer T connect two inputs of rectifier bridge heap Vc, two outputs, the one end ground connection of rectifier bridge heap Vc, the other end connects the input of filter capacitor C1 and circuit of three-terminal voltage-stabilizing integrated IC1, the output of circuit of three-terminal voltage-stabilizing integrated IC1 connects filter capacitor C2 and sampling control circuit, the other end of filter capacitor C1, the equal ground connection of the other end of the circuit of three-terminal voltage-stabilizing integrated IC1 other end and filter capacitor C2.
5. according to claim 1 or 2 or 3 or 4 described a kind of three phase alternating current motor phase sequence identifying instruments, it is characterized in that, described automatic commutation circuit is by time-base integrated circuit IC2, resistance R 4, resistance R 6, relay K 2, relay K 3, potentiometer RP2, diode VD2, diode VD3, light-emitting diode VL2, capacitor C4, capacitor C5 and A.C. contactor KM2 form, one end of resistance R 6 connects with 4 pin of time-base integrated circuit IC2, the other end of resistance R 6 connects with an end of relay K 3, the other end ground connection of relay K 3, potentiometer RP2 is in parallel with diode VD2, the end of diode VD2 connects with 4 pin of time-base integrated circuit IC2,6 pin of the other end of diode VD2 and time-base integrated circuit IC2,2 pin connect, capacitor C4 one end connects with 2 pin of time-base integrated circuit IC2, the other end ground connection of capacitor C4, normally-closed contact K3 and the capacitor C4 parallel connection corresponding with relay K 3,4 pin of time-base integrated circuit IC2,8 pin all connect with direct current regulation circuit, in parallel with diode VD3 and relay K 2 again after resistance R 4 and the light-emitting diode VL2 series connection, the end of diode VD3 connects with 4 pin of time-base integrated circuit IC2, the other end of diode VD3 connects with 3 pin of time-base integrated circuit IC2, the 1 pin ground connection of time-base integrated circuit IC2,5 pin of time-base integrated circuit IC2 connect the end of capacitor C5, the other end ground connection of capacitor C5 is connected between the two-phase of three-phase alternating-current supply after normally opened contact K2 corresponding with relay K 2 and the A.C. contactor KM2 series connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010205472398U CN201893739U (en) | 2010-09-29 | 2010-09-29 | Three-phase alternating-current motor phase-sequence recognizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010205472398U CN201893739U (en) | 2010-09-29 | 2010-09-29 | Three-phase alternating-current motor phase-sequence recognizer |
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| CN201893739U true CN201893739U (en) | 2011-07-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459355A (en) * | 2013-09-24 | 2015-03-25 | 珠海格力电器股份有限公司 | Phase sequence detection device |
| CN109353445A (en) * | 2018-12-10 | 2019-02-19 | 叶建君 | A kind of circulation reinforcement high-speed bicycle |
-
2010
- 2010-09-29 CN CN2010205472398U patent/CN201893739U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459355A (en) * | 2013-09-24 | 2015-03-25 | 珠海格力电器股份有限公司 | Phase sequence detection device |
| CN104459355B (en) * | 2013-09-24 | 2017-10-03 | 珠海格力电器股份有限公司 | Phase sequence detection device |
| CN109353445A (en) * | 2018-12-10 | 2019-02-19 | 叶建君 | A kind of circulation reinforcement high-speed bicycle |
| CN109353445B (en) * | 2018-12-10 | 2023-08-29 | 叶建君 | Circulation reinforcement high-speed bicycle |
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| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG ERG TECHNOLOGY INC. Free format text: FORMER NAME: ZHEJIANG ERG TECHNOLOGY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Taizhou City, Zhejiang Province, 317113 in the three County Economic Development Zone Patentee after: Zhejiang Erg Technology Inc. Address before: Taizhou City, Zhejiang Province, 317113 in the three County Economic Development Zone Patentee before: Zhejiang Erg Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20190929 |