CN103138656A - Electric motor startup operation control device - Google Patents
Electric motor startup operation control device Download PDFInfo
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- CN103138656A CN103138656A CN2011103731452A CN201110373145A CN103138656A CN 103138656 A CN103138656 A CN 103138656A CN 2011103731452 A CN2011103731452 A CN 2011103731452A CN 201110373145 A CN201110373145 A CN 201110373145A CN 103138656 A CN103138656 A CN 103138656A
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Abstract
An electric motor startup operation control device comprises a main loop and a control loop. The main loop comprises an electric motor residual-current circuit breaker and a first alternating current contactor main contact which are sequentially connected between a three-phase supply input end and an electric motor winding input end in series, and further comprises a third first alternating current contactor main contact and a second first alternating current contactor main contact, wherein two ends of the third first alternating current contactor main contact are connected to the input end of the first alternating current contactor main contact and an electric motor winding output end in parallel to form delta connection, one end of the second first alternating current contactor main contact is connected to the electric motor winding output end, and the other end of the second first alternating current contactor main contact shorts out and is connected in star mode. The control loop comprises a first alternating current contactor coil and a second alternating current contactor coil which control electric motor star connection startup, further comprises a third alternating current contactor coil and a time-delay relay, wherein the third alternating current contactor coil is connected with the first alternating current contactor coil and controls the electric motor star connection startup, and the time-delay relay can control conversion from the electric motor star connection startup to delta connection operation. The electric motor startup operation control device is energy-saving and safe and can be widely suitable for water conservancy water logging drainage and industrial and mining enterprises.
Description
Technical field
The present invention relates to a kind of device of controlling motor start-up operation, particularly not only energy-conservation but also safe control device.
Background technology
At present, the control device of traditional star triangle (Y-connection is connected with triangle) motor starting operation comprises major loop and control loop, wherein:
(1) as shown in Figure 1, major loop comprises fuse wire FU, knife switch QF, thermal relay FR and the first A.C. contactor 1KM main contacts be series at successively between three-phase power input end and motor M winding input, also comprise that two ends are connected to the input of this first A.C. contactor 1KM main contacts and this motor M winding output the second A.C. contactor 2KM main contacts be connected triangular in shape, and an end is connected to this motor M winding output and other end short circuit be the 3rd A.C. contactor 3KM main contacts of Y-connection.
(2) as shown in Figure 2, control loop comprises the mains switch SB3 of series connection successively, shutdown switch SB2 and the first A.C. contactor 1KM coil, this shutdown switch SB2 also connects this first A.C. contactor 1KM normally opened contact, these the first A.C. contactor 1KM coil two ends also connect by the 3rd A.C. contactor 3KM coil, the first series arm that a normally closed switch in the second A.C. contactor 2KM normally-closed contact and ganged switch SB1 forms, also and connect by the second A.C. contactor 2KM coil, the second series arm that another normal open switch in the 3rd A.C. contactor 3KM normally-closed contact and this ganged switch SB1 forms, normal open switch this second A.C. contactor 2KM normally opened contact in parallel also in this ganged switch SB3, the power input of this control loop is two phase output terminals in this residual current circuit breaker QF.
Although traditional motor starting can be realized normal starting, stops and moving; but all exist larger defect at aspects such as fail safe, stability, defencive function and energy-saving efficiencies; such as the electric current of contactor, thermal relay is line current; power consumption is large; manufacturing cost is high, to emergency processing and the shortage of the personal safety in the control loop defencive function of catastrophic discontinuityfailures such as leaking electricity in the electric equipment major loop, the contactor spring is aging.
Summary of the invention
In order to make up above step, the invention provides a kind of motor start-up control device, not only energy-conservation but also safety, can be widely used in rural water conservancy water drainage and irrigate and industrial and mineral enterprises and institutions.
Technical scheme of the present invention is achieved in that a kind of motor start-up control device, comprise major loop and control loop, this major loop comprises motor residual current circuit breaker and the first A.C. contactor main contacts be series at successively between three-phase power input end and motor winding input, wherein:
(1) this major loop also comprises the second A.C. contactor main contacts and the 3rd A.C. contactor main contacts, one end of this second A.C. contactor main contacts is connected to this motor winding output and other end short circuit be Y-connection, and the two ends of the 3rd A.C. contactor main contacts are connected to input and this motor winding output triangular in shape connection of this first A.C. contactor main contacts;
(2) this control loop comprises this first ac contactor coil and the second ac contactor coil of controlling motor Y-connection startup, also comprise together with this first ac contactor coil and control the 3rd ac contactor coil that this motor triangle connects operation, also comprise that can control the motor Y-connection starts the time-delay relay that is converted to triangle connection operation.
As the present invention, further improve, between this motor residual current circuit breaker and this first A.C. contactor main contacts, threephase current transformer also is installed, this threephase current transformer series connection three-phase thermal relay, and the normally-closed contact of this three-phase thermal relay is series in this control loop.
As the present invention, further improve, this first ac contactor coil and start button and stop button are series at this control loop, this start button is parallel to the first A.C. contactor normally opened contact, this second ac contactor coil is with after the time-delay relay normally-closed contact is connected in series, be parallel to again this time-delay relay two ends, and this time-delay relay is with after the 3rd A.C. contactor normally-closed contact is connected, be connected to again this first ac contactor coil two ends, this time-delay relay normally opened contact is with after the 3rd ac contactor coil and the second A.C. contactor normally-closed contact are connected, be parallel to again this first ac contactor coil two ends, this time-delay relay normally opened contact also connects the 3rd A.C. contactor normally opened contact.
As the present invention, further improve, this control loop also comprises that can directly control motor makes the ganged switch that triangle connects operation, a normally closed switch in this ganged switch is series between the tie point and this time-delay relay normally-closed contact of this time-delay relay and the 3rd A.C. contactor normally-closed contact, and another normal open switch in this ganged switch is parallel to this time-delay relay normally opened contact two ends.
As the present invention, further improve, respectively and connect first, second signal lamp, the start button in this control loop and the first A.C. contactor and stop button both sides are also and connect the 3rd signal lamp for this second ac contactor coil and the 3rd ac contactor coil.
As the present invention, further improve, this threephase current transformer is connected in series respectively three ammeters.
As the present invention, further improve; this control loop also is connected in series a mutually disconnected and phase sequence protective relay; three inputs that are somebody's turn to do mutually disconnected and phase sequence protective relay are connected to three outputs of this motor residual current circuit breaker, and these two outputs mutually disconnected and phase sequence protective relay are serially connected with in this control loop.
As the present invention, further improve, this control loop power input accesses two phase output terminals in this motor residual current circuit breaker by the second residual current circuit breaker.
As the present invention, further improve, this motor residual current circuit breaker is provided with the decompression coil that this control loop power input is accessed at two ends, and this decompression coil also is connected in series an emergency stop push button.
As the present invention, further improve, this emergency stop push button, together with this start button and stop button, is installed the control panel in convenient operation concentratedly.
Useful technique effect of the present invention is: the first A.C. contactor main contacts in major loop coordinates this motor triangle of formation to be connected with the second A.C. contactor main contacts, and realize that the motor triangle connects startup, and the first A.C. contactor main contacts in major loop coordinates this motor Y-connection of formation with the 3rd A.C. contactor main contacts, and realize that the motor Y-connection starts, and meanwhile, realize that by time-delay relay triangle and Y-connection start conversion in control loop, and major loop A.C. contactor carrying phase current is than improving the front current reduction
electric current, the cost in the time of can reducing manufacture and use.
Between this residual current circuit breaker and this first A.C. contactor main contacts, threephase current transformer also is installed, this threephase current transformer series connection three-phase thermal relay, and the normally-closed contact of this three-phase thermal relay is series in this control loop, by capacity, load is surveyed in less thermal relay danger like this, reduces the thermal relay cost.
The accompanying drawing explanation
The major loop schematic diagram that Fig. 1 is motor start-up running gear in prior art;
The control loop schematic diagram that Fig. 2 is motor start-up running gear in prior art;
Fig. 3 is the major loop schematic diagram in control device of the present invention;
Fig. 4 is the control loop schematic diagram in control device of the present invention;
Fig. 5 is motor residual current circuit breaker described in the present invention and emergency stop push button schematic diagram.
Contrast above accompanying drawing and be supplemented as follows explanation:
FU---fuse wire QF---knife switch
M---motor 2SB---start button
QF1---motor residual current circuit breaker 3SB---ganged switch
QF2---second residual current circuit breaker HY---first signal indicator light
1KM---first A.C. contactor HG---secondary signal indicator light
2KM---second A.C. contactor HR---the 3rd signal lamp
3KM---the 3rd A.C. contactor A---ammeter
KT---time-delay relay U
w21---two phase output terminals
The disconnected phase of TA---threephase current transformer 1---and phase sequence protective relay
KH---three-phase thermal relay 2---decompression coil
1SB---stop button SF---emergency stop push button
FR---thermal relay
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with drawings and Examples:
As shown in Figure 3 and Figure 4, motor start-up control device of the present invention and prior art (as depicted in figs. 1 and 2) are basic identical, comprise equally major loop and control loop, major loop comprises motor residual current circuit breaker QF1 and the first A.C. contactor IKM main contacts be series at successively between three-phase power input end and motor M winding input, also comprise the second A.C. contactor 2KM main contacts and the 3rd A.C. contactor 3KM main contacts, one end of this second A.C. contactor 2KM main contacts is connected to this motor M winding output and other end short circuit be Y-connection, the two ends of the 3rd A.C. contactor 3KM main contacts are connected to the input and this motor M winding output triangular in shape connection of this first A.C. contactor 1KM main contacts, this control loop comprises controls this first A.C. contactor 1KM coil and the second A.C. contactor 2KM coil that the motor Y-connection starts, also comprise together with this first A.C. contactor 1KM coil and control the 3rd A.C. contactor 3KM coil that this motor triangle connects operation, this motor residual current circuit breaker QF1 plays the emergent stopping effect to electromotor overload.
But be with the prior art difference, this control loop also comprises that can control motor star connects the time-delay relay KT that startup is converted to triangle connection operation, this the first A.C. contactor 1KM coil and start button 2SB and stop button 1SB are series at this control loop, this start button 2SB the first A.C. contactor 1KM normally opened contact in parallel, this second A.C. contactor 2KM coil is with after time-delay relay KT normally-closed contact is connected in series, be parallel to again this time-delay relay KT two ends, and this time-delay relay KT is with after the 3rd A.C. contactor 3KM normally-closed contact is connected, be connected to again this first A.C. contactor 1KM coil two ends, this time-delay relay KT normally opened contact is with after the 3rd A.C. contactor 3KM coil and the second A.C. contactor 2KM normally-closed contact are connected, be parallel to again this first A.C. contactor 1KM coil two ends, this time-delay relay normally opened contact also connects the 3rd A.C. contactor 3KM normally opened contact.In this major loop, the electric current of each A.C. contactor carrying is phase current, than line current, reduces
, reduce manufacturing cost.
Between this motor residual current circuit breaker QF1 and this first A.C. contactor 1KM main contacts, threephase current transformer TA also is installed, this threephase current transformer TA series connection three-phase thermal relay KH, and the normally-closed contact of this three-phase thermal relay KH is series in this control loop, thermal relay uses in secondary line, the electric current born is the electric current after current transformer ratio, impulse current while reducing motor starting, this threephase current transformer TA is connected in series respectively three ammeter A, for detection of overload conditions.
This control loop also comprises can directly control the ganged switch 3SB that the motor triangle connects operation, a normally closed switch in this ganged switch 3SB is series between the tie point and this time-delay relay KT normally-closed contact of this time-delay relay KT and the 3rd A.C. contactor 3KM normally-closed contact, another normal open switch in this ganged switch 3SB is parallel to this time-delay relay KT normally opened contact two ends, this ganged switch 3SB is actual in forcing button, in order to prevent brownout, cause starting difficulty, at transformer, meet under motor starting capacity prerequisite, use and force button to carry out direct-on-line starting.
This second A.C. contactor 2KM coil and the 3rd A.C. contactor 3KM coil are respectively and meet first, second signal lamp (HY, HG), start button 2SB in this control loop and the first A.C. contactor 1KM with also stop upper button 1SB both sides and meet the 3rd signal lamp HR, show that by different indicator light situation can detect the motor start-up operation conditions like this.
This control loop also is connected in series a mutually disconnected and phase sequence protective relay 1; three inputs that are somebody's turn to do mutually disconnected and phase sequence protective relay 1 are connected to three outputs of this motor residual current circuit breaker QF1; two outputs that are somebody's turn to do mutually disconnected and phase sequence protective relay 1 are serially connected with in this control loop; the phase of should breaking and phase sequence protective relay 1 are for the water pump use of standing as water drainage, to design specially; prevent reversing and phase shortage; described disconnected phase and phase sequence protective relay are to those skilled in the art; belong to known mature technology, do not describe at this.
This control loop power input accesses two phase output terminals (U21, W21) in this motor residual current circuit breaker QF1 by the second residual current circuit breaker QF2; two secondary line earth leakage protectives are to prevent secondary line the year aging and safe ancillary method of life of a specified duration; this second residual current circuit breaker QF2 can adopt those skilled in the art to be familiar with technical scheme, at this, does not describe.
This motor residual current circuit breaker QF1 is provided with the decompression coil 2 that this control loop power input (U21, W21) accessed at two ends, usually decompression coil 2 also is connected in series an emergency stop push button SF, this emergency stop push button is together with this start button and stop button, install the control panel in convenient operation concentratedly, therefore, this emergency control switch can prevent aging or other fault of long rear spring A.C. contactor service time, when other stop buttons of control loop are out of control, be easy to use the emergency control switch and control main circuit and control loop and have a power failure and ensure safety.Residual current circuit breaker belongs to known technology for a person skilled in the art; its operation principle is: when circuit leaks electricity, residual current circuit breaker produces residual current, and controls the magnetictrip action by the decompression coil; residual current circuit breaker tripping operation, protection circuit and downstream electric equipment thus.
The operation principle of this motor start-up control device is as follows:
As control loop mains switch 1SB and starting switch 2SB closed (the now thermal relay KH closing of contact), the first A.C. contactor 1KM coil and the second A.C. contactor 2KM coil electricity, motor M does Y-connection and starts, and meanwhile time-delay relay KT on-delay starts.When time-delay relay KT action, the first A.C. contactor 1KM coil and the 3rd A.C. contactor 3KM coil electricity, motor is made triangle and is connected operation, realizes thus the conversion of motor star triangle start.If the motor operating overload, by this threephase current transformer TA, trigger the three-phase thermal relay KH contact of series connection, realize the control loop open circuit, the protection motor.
Be not inconsistent if Electric Motor Open-phase Situation or phase place occur, by mutually disconnected and phase sequence module 1, realize the control loop open circuit, the protection motor.
Motor residual current circuit breaker QF1 in major loop plays earth leakage protective to all power consumption equipments below this motor residual current circuit breaker QF1, and electromotor overload is played a protective role simultaneously, and the chance failure of equipment is arranged to emergency stop function.And the second residual current circuit breaker QF2 in control loop prevents from the control cubicle electric leakage from having improved personal safety.
Claims (10)
1. a motor start-up control device, comprise major loop and control loop, this major loop comprises motor residual current circuit breaker (QF1) and the first A.C. contactor (1KM) main contacts be series at successively between three-phase power input end and motor (M) winding input, it is characterized in that, wherein:
(1) this major loop also comprises the two or two A.C. contactor (2KM) main contacts and the 3rd A.C. contactor (3KM) main contacts, one end of this second A.C. contactor (2KM) main contacts is connected to this motor (M) winding output and other end short circuit be Y-connection, and the two ends of the 3rd A.C. contactor (3KM) main contacts are connected to input and this motor (M) winding output triangular in shape connection of this first A.C. contactor (1KM) main contacts;
(2) this control loop comprises this first A.C. contactor (1KM) coil and the second A.C. contactor (2KM) coil of controlling motor Y-connection startup, also comprise and be connected the 3rd A.C. contactor (3KM) coil of operation together with this first A.C. contactor (1KM) coil with this motor triangle of control, also comprise that can control the motor Y-connection starts the time-delay relay (KT) that is converted to triangle connection operation.
2. a kind of motor start-up control device as claimed in claim 1, it is characterized in that, between this motor residual current circuit breaker (QF1) and this first A.C. contactor (1KM) main contacts, threephase current transformer (TA) also is installed, this threephase current transformer (TA) series connection three-phase thermal relay (KH), and the normally-closed contact of this three-phase thermal relay (KH) is series in this control loop.
3. a kind of motor start-up control device as claimed in claim 1 or 2, it is characterized in that, this the first A.C. contactor (1KM) coil and start button (2SB) and stop button (1SB) are series at this control loop, this start button (2SB) is parallel to the first A.C. contactor (1KM) normally opened contact, this the second A.C. contactor (2KM) coil is with after time-delay relay (KT) normally-closed contact is connected in series, be parallel to again this time-delay relay (KT) two ends, and this time-delay relay (KT) is with after the 3rd A.C. contactor (3KM) normally-closed contact is connected, be connected to again this first A.C. contactor (1KM) coil two ends, this time-delay relay (KT) normally opened contact is with after the 3rd A.C. contactor (3KM) coil and the second A.C. contactor (2KM) normally-closed contact are connected, be parallel to again this first A.C. contactor (1KM) coil two ends, this time-delay relay normally opened contact also connects the 3rd A.C. contactor (3KM) normally opened contact.
4. a kind of motor start-up control device as claimed in claim 3, it is characterized in that, this control loop also comprises that can directly control motor makes the ganged switch (3SB) that triangle connects operation, a normally closed switch in this ganged switch (3SB) is series between the tie point and this time-delay relay (KT) normally-closed contact of this time-delay relay (KT) and the 3rd A.C. contactor (3KM) normally-closed contact, and another normal open switch in this ganged switch (3SB) is parallel to this time-delay relay (KT) normally opened contact two ends.
5. a kind of motor start-up control device as claimed in claim 3, it is characterized in that, this the second A.C. contactor (2KM) coil and the 3rd A.C. contactor (3KM) coil are respectively and meet first, second signal lamp (HY, HG), the start button (2SB) in this control loop and the first A.C. contactor (1KM) and stop button (1SB) both sides are also and connect the 3rd signal lamp (HR).
6. a kind of motor start-up control device as claimed in claim 2, is characterized in that, this threephase current transformer (TA) is connected in series respectively three ammeters (A).
7. a kind of motor start-up control device as claimed in claim 3; it is characterized in that; this control loop also is connected in series a mutually disconnected and phase sequence protective relay (1); three inputs that are somebody's turn to do mutually disconnected and phase sequence protective relay (1) are connected to three outputs of this motor residual current circuit breaker (QF1), and these two outputs mutually disconnected and phase sequence protective relay (1) are serially connected with in this control loop.
8. a kind of motor start-up control device as claimed in claim 3, it is characterized in that, this control loop power input accesses two phase output terminals (U21, W21) in this motor residual current circuit breaker (QF1) by the second residual current circuit breaker (QF2).
9. a kind of motor start-up control device as claimed in claim 8, it is characterized in that, this motor residual current circuit breaker (QF1) is provided with the decompression coil (2) that this control loop power input (U21, W21) is accessed at two ends, and this decompression coil (2) also is connected in series an emergency stop push button (SF).
10. a kind of motor start-up control device as claimed in claim 9, is characterized in that, this emergency stop push button (SF), together with this start button (2SB) and stop button (1SB), is installed the control panel in convenient operation concentratedly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103731452A CN103138656A (en) | 2011-11-22 | 2011-11-22 | Electric motor startup operation control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103731452A CN103138656A (en) | 2011-11-22 | 2011-11-22 | Electric motor startup operation control device |
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| Publication Number | Publication Date |
|---|---|
| CN103138656A true CN103138656A (en) | 2013-06-05 |
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ID=48498067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103731452A Pending CN103138656A (en) | 2011-11-22 | 2011-11-22 | Electric motor startup operation control device |
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| CN (1) | CN103138656A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956998A (en) * | 2014-04-25 | 2014-07-30 | 国家电网公司 | Energy-saving lightning protection device of agricultural irrigation line |
| CN104333267A (en) * | 2014-10-20 | 2015-02-04 | 信阳师范学院 | Star triangle intelligent soft start controller based on PIC |
| CN104682776A (en) * | 2015-03-06 | 2015-06-03 | 徐家成 | Blower control device |
| CN106527337A (en) * | 2016-12-12 | 2017-03-22 | 天津彼洋机器人系统工程有限公司 | Safety control system aiming at motor power |
| CN110350826A (en) * | 2019-07-09 | 2019-10-18 | 冯少强 | A kind of asynchronous motor that service is combined with compensation |
-
2011
- 2011-11-22 CN CN2011103731452A patent/CN103138656A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956998A (en) * | 2014-04-25 | 2014-07-30 | 国家电网公司 | Energy-saving lightning protection device of agricultural irrigation line |
| CN104333267A (en) * | 2014-10-20 | 2015-02-04 | 信阳师范学院 | Star triangle intelligent soft start controller based on PIC |
| CN104333267B (en) * | 2014-10-20 | 2017-08-29 | 信阳师范学院 | Star triangle intelligent soft starting controller based on PIC |
| CN104682776A (en) * | 2015-03-06 | 2015-06-03 | 徐家成 | Blower control device |
| CN106527337A (en) * | 2016-12-12 | 2017-03-22 | 天津彼洋机器人系统工程有限公司 | Safety control system aiming at motor power |
| CN110350826A (en) * | 2019-07-09 | 2019-10-18 | 冯少强 | A kind of asynchronous motor that service is combined with compensation |
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Application publication date: 20130605 |