CN202160137U - Motor star-triangle start circuit - Google Patents
Motor star-triangle start circuit Download PDFInfo
- Publication number
- CN202160137U CN202160137U CN2011202616715U CN201120261671U CN202160137U CN 202160137 U CN202160137 U CN 202160137U CN 2011202616715 U CN2011202616715 U CN 2011202616715U CN 201120261671 U CN201120261671 U CN 201120261671U CN 202160137 U CN202160137 U CN 202160137U
- Authority
- CN
- China
- Prior art keywords
- contactor
- contact
- star
- circuit
- triangle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Motor And Converter Starters (AREA)
- Relay Circuits (AREA)
Abstract
The utility model discloses a motor star-triangle start circuit in the field of motors. The motor star-triangle start circuit comprises a three-phase power supply, a star-triangle switch circuit and a control circuit, wherein the star-triangle switch circuit is connected with the three-phase power supply through a first breaker; the control circuit is connected with the three-phase power supply through a second breaker; and the three-phase power supply respectively supplies power to the star-triangle switch circuit and the control circuit. During a working process, the service life of a relay is prolonged by protecting a time relay by supplying power to the time relay in a start process only; and a first alternating current contactor and a third alternating current contactor work separately, so that a main contact of a contactor burnt by an electric arc generated by the main contact of the third alternating current contactor is avoided, and the safety and the stability of motor start are improved. The motor star-triangle start circuit can be used in motor star-triangle start.
Description
Technical field
The utility model relates to a kind of motor, particularly a kind of electric motor starting circuit.
Background technology
In the prior art; Star as shown in Figure 2-triangle start-up circuit; Comprise three phase mains, star-triangle commutation circuit C and control circuit D; Star-triangle commutation circuit C is connected on the three phase mains through the first circuit breaker Q F1; Control circuit D is connected on the three phase mains through the second circuit breaker Q F2; Three phase mains supplies power for star-triangle commutation circuit C and control circuit D, and what said star-triangle commutation circuit C comprised first A.C. contactor that is connected in series often opens main contacts KM1-2, motor M, overload relay FR1, and the main contacts KM2-2 that often opens of this series arm and second A.C. contactor is connected between the normally closed main contacts KM3-2 of the first breaker contact point QF1 and the 3rd contactor after parallelly connected; Said control circuit D comprises the coil of coil, branch road one, branch road two and the time relay KT1 of the first A.C. contactor KM1 together that is connected in parallel; Said branch road one is the normally closed auxilliary contact KM3-1 that often drives timing closing contact KT1-2, the 3rd A.C. contactor of the time relay that is connected in series and the coil of the second A.C. contactor KM2; Said branch road two comprises the normally closed time-delay break contact KT1-1 of the time relay that is connected in series, the normally closed auxilliary contact KM2-1 of second A.C. contactor and the coil of the 3rd A.C. contactor KM3; The normally-closed contact FR1-1 of circuit after this parallel connection and stop button SB1, start button SB2, overload relay is connected between the both positive and negative polarity of the second circuit breaker Q F2, and start button SB2 across has the auxilliary contact KM1-1 of often opening of first A.C. contactor.
During work; Need close circuit breaker QF1 contact; Close circuit breaker QF2 contact; Started by press button SB2 during actuating motor, the electric current positive pole is through stopping button SB1 normally-closed contact, starting button SB2 normally opened contact; On the one hand to the coil of the first A.C. contactor KM1, on the other hand time relay KT1 coil, simultaneously through the coil of normally closed auxilliary contact KM2-1 to the three A.C. contactor KM3 of the normally closed time-delay break contact KT1-1 of the time relay, second A.C. contactor; The electric current negative pole makes the coil of the first A.C. contactor KM1, the coil of time relay KT1, the coil of the 3rd A.C. contactor KM3 get electrician's work simultaneously through the normally-closed contact FR1-1 of overload relay, and contact KM1-1 closure is assisted in often opening of first A.C. contactor; Form self-locking, thus make the coil of coil and the time relay KT1 of the A.C. contactor KM1 that wins be in always electricity condition; First A.C. contactor often to open main contacts KM1-2 closed, the 3rd A.C. contactor often to open main contacts KM3-2 closed, motor is formed star, and is connected on the power supply through the main contacts KM1-1 that often opens of first A.C. contactor, motor is realized the star reduced voltage starting; When the delay time set point of time relay K T1 arrives; The normally closed time-delay break contact of time relay KT1-1 breaks off; Thereby make the coil losing electricity of the 3rd A.C. contactor KM3, simultaneously the time relay often to open timing closing contact KT1-2 closed, the electric current positive pole is through the coil of normally closed auxilliary contact KM3-1 to the second A.C. contactor KM2 that often drives timing closing contact KT1-2, the 3rd A.C. contactor of the time relay; The coil of the second A.C. contactor KM2 is got; The normally closed main contacts KM2-2 of second A.C. contactor is closed, makes the main circuit of motor changed into triangle, and motor runs well.
Its weak point is: in this circuit, time relay KT1 is in behind electric motor starting and gets electricity condition always, reduces its useful life; The first A.C. contactor KM1, the second A.C. contactor KM3 at the same time electrician when doing, be prone between main contacts KM3-2 produce electric arc often opening of the 3rd A.C. contactor, burn the 3rd A.C. contactor KM3.
The utility model content
The purpose of the utility model provides a kind of motor star-triangle start-up circuit, has prolonged the useful life of the time relay, has improved the security and stability of start-up course.
The purpose of the utility model is achieved in that motor star-triangle start-up circuit; Comprise three phase mains, star-triangle commutation circuit and control circuit; Star-triangle commutation circuit is connected on the three phase mains through first circuit breaker; Control circuit is connected on the three phase mains through second circuit breaker; Said three phase mains is given the power supply of star-triangle commutation circuit and control circuit respectively; What said star-triangle commutation circuit comprised first A.C. contactor that is connected in series often drives main contacts, motor, overload relay; The main contacts of often opening of this series arm and second A.C. contactor is connected between the normally closed main contacts of first breaker contact point and the 3rd contactor after parallelly connected; Said control circuit comprises first branch road and second branch road; First branch road comprises the main coil of often driving auxilliary contact, first A.C. contactor of first A.C. contactor that order links to each other; The said first A.C. contactor across has the normally closed auxilliary contact of the 3rd A.C. contactor that is cascaded, the main coil of second A.C. contactor; Said second branch road comprises start button, the normally closed auxilliary contact of second A.C. contactor and the main coil of the time relay that order links to each other; Said time relay main coil across has the normally closed time-delay break contact of the time relay that is cascaded and the main coil of the 3rd A.C. contactor, said first branch road with after second branch road is parallelly connected and the normally-closed contact of stop button, overload relay be connected between the both positive and negative polarity of second circuit breaker, the electrode points cross-over connection has the 3rd A.C. contactor often to open auxilliary contact between the normally closed time-delay break contact of the electrode points between the normally closed auxilliary contact of often driving auxilliary contact, the 3rd A.C. contactor of said first A.C. contactor and the normally closed auxilliary contact of second A.C. contactor, the time relay.
During the utility model work, need closed first breaker contact point, closed second breaker contact point; Started by press button during actuating motor; The electric current positive pole is through the contact that stops button, the contact of start button, the normally closed auxilliary contact of second A.C. contactor, on the one hand to the main coil of the time relay, on the other hand through time relay make delay break contact, to the main coil of the 3rd A.C. contactor; The normally-closed contact of electric current negative pole to overload relay; Make the time relay main coil, the 3rd A.C. contactor main coil simultaneously the electrician does, the main contacts closure of often opening of the 3rd A.C. contactor is formed star with motor, the 3rd A.C. contactor often opens the auxilliary closing of contact simultaneously; Make the main coil of the A.C. contactor of winning get electrician's work; First A.C. contactor often open the auxilliary closing of contact, form self-locking, thus make the main coil of the A.C. contactor of winning be in always electricity condition; The normally closed auxilliary contact of the 3rd A.C. contactor is broken off, thus make second A.C. contactor main coil can not the electrician does, motor through first A.C. contactor often open the main contacts closure after be connected on the power supply motor realization star reduced voltage starting.When the delay time set point of time relay arrives; The normally closed time-delay break contact of the time relay breaks off; Thereby make the main coil dead electricity of the 3rd A.C. contactor, the auxilliary closing of contact of the disconnection of the 3rd A.C. contactor simultaneously, the auxilliary contact of the closure of the 3rd A.C. contactor is broken off; Make the main coil dead electricity of the time relay, and the closed main contacts of the 3rd A.C. contactor breaks off; The main coil of normally closed auxilliary contact to the second A.C. contactor of often driving auxilliary contact, the 3rd A.C. contactor of the anodal warp of electric current first A.C. contactor; The normally-closed contact of electric current negative pole to overload relay; Make the main coil of second A.C. contactor get electrician's work; The main contacts closure of often opening of second A.C. contactor is transformed into triangle with the main circuit of motor, and motor runs well.
Compared with prior art, the beneficial effect of the utility model is: in this circuit, the time relay is only switched in the electric motor starting process, and after star-triangle changing-over, the time relay is in off-position, thereby has prolonged the useful life of the time relay; Other the 3rd A.C. contactor gets earlier; Let the motor circuit form star earlier; And then make the main coil of the A.C. contactor of winning get the electrician through the auxilliary closing of contact of often opening of the 3rd A.C. contactor to do; Motor is connected on the power supply through the main contacts of often opening of first A.C. contactor, has avoided producing electric arc and has burnt the main contacts of the 3rd A.C. contactor, thereby improved the security and stability that starts.
As the further improvement of the utility model, the main coil across of said second A.C. contactor has indicator light.Make when star switches to triangle, can show by indicator light, thus but the feasible very first time discovery of breaking down.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is motor star in the prior art-triangle start-up circuit structural representation.
Embodiment
Motor star-triangle start-up circuit as shown in Figure 1; Comprise three phase mains, star-triangle commutation circuit A; With control circuit B; Star-triangle commutation circuit A is connected on the three phase mains through the first circuit breaker Q F1; Control circuit B is connected on the three phase mains through the second circuit breaker Q F2; Three phase mains is given star-triangle commutation circuit A and control circuit B power supply respectively; What star-triangle commutation circuit A comprised first A.C. contactor that is connected in series often opens main contacts KM1-2, motor M, overload relay FR1; The main contacts KM2-2 that often opens of this series arm and second A.C. contactor is connected between the normally closed main contacts KM3-3 of the first breaker contact point QF1 and the 3rd contactor after parallelly connected; Control circuit comprises first branch road and second branch road; First branch road comprises the main coil of often opening auxilliary contact KM1-1, the first A.C. contactor KM1 of first A.C. contactor that order links to each other; The first A.C. contactor KM1 across has the normally closed auxilliary contact KM3-2 of the 3rd A.C. contactor that is cascaded, the main coil of the second A.C. contactor KM2; Second branch road comprises start button SB2, the normally closed auxilliary contact KM2-1 of second A.C. contactor and the main coil of time relay KT1 that order links to each other, and time relay KT1 main coil across has the normally closed time-delay break contact KT1-1 of the time relay that is cascaded and the main coil of the 3rd A.C. contactor KM3, first branch road with after second branch road is parallelly connected and the normally-closed contact FR1-1 of stop button SB1, overload relay be connected between the both positive and negative polarity of the second circuit breaker Q F2; The electrode points cross-over connection has the 3rd A.C. contactor often to open auxilliary contact KM3-1 between the normally closed time-delay break contact KT1-1 of the electrode points between the normally closed auxilliary contact KM3-2 that often drives auxilliary contact KM1-1, the 3rd A.C. contactor of first A.C. contactor and the normally closed auxilliary contact KM2-1 of second A.C. contactor, the time relay, and the main coil across of the second A.C. contactor KM2 has indicator light HL1.
During work, need the closed first circuit breaker Q F1 contact, the closed second circuit breaker Q F2 contact; Started by press button SB2 during actuating motor M; The electric current positive pole is through the contact that stops button SB1, the contact of start button SB2, the normally closed auxilliary contact KM2-1 of second A.C. contactor, on the one hand to the main coil of time relay KT1, on the other hand through time relay make delay break contact KT1-1, to the main coil of the 3rd A.C. contactor KM3; The normally-closed contact FR1-1 of electric current negative pole to overload relay; Make the main coil of time relay KT1, the main coil of the 3rd A.C. contactor KM3 get electrician's work simultaneously, the main contacts KM3-3 closure of often opening of the 3rd A.C. contactor is formed star with motor M, and often opening of the 3rd A.C. contactor assisted contact KM3-1 closure simultaneously; Make the main coil of the A.C. contactor KM1 that wins get electrician's work; First A.C. contactor often to open auxilliary contact KM1-1 closed, form self-locking, thus make the main coil of the A.C. contactor KM1 that wins be in always electricity condition; The normally closed auxilliary contact KM3-2 of the 3rd A.C. contactor breaks off; Thereby make the main coil of the second A.C. contactor KM2 can not get electrician's work; Motor M through first A.C. contactor often open main contacts KM1-2 closure after be connected on the power supply, motor M realizes the star reduced voltage starting.When the delay time set point of time relay K T1 arrives; The normally closed time-delay break contact KT1-1 of the time relay breaks off; Thereby make the main coil dead electricity of the 3rd A.C. contactor KM3, auxilliary contact KM3-2 is closed in the disconnection of the 3rd A.C. contactor simultaneously, and the auxilliary contact KM3-1 of the closure of the 3rd A.C. contactor breaks off; Make the main coil dead electricity of time relay KT1, and the closed main contacts KM3-3 of the 3rd A.C. contactor breaks off; The anodal main coil of often opening normally closed auxilliary contact KM3-2 to the second A.C. contactor KM2 that assists contact KM1-1, the 3rd A.C. contactor of electric current through first A.C. contactor; The normally-closed contact FR1-1 of electric current negative pole to overload relay; Make the main coil of the second A.C. contactor KM2 get electrician's work; The main contacts KM2-2 closure of often opening of second A.C. contactor is transformed into triangle with the main circuit of motor M, and motor M runs well.
In this circuit, time relay KT1 only switches in the motor M start-up course, and after star-triangle changing-over, time relay KT1 is in off-position, thereby has prolonged the useful life of time relay KT1; Other the 3rd A.C. contactor KM3 gets earlier; Let the motor M circuit form star earlier; And then make the main coil of the A.C. contactor KM1 that wins get the electrician through the auxilliary contact of often opening of the 3rd A.C. contactor KM3-1 closure to do; Motor M is connected on the power supply through the main contacts KM1-2 that often opens of first A.C. contactor, has avoided producing that electric arc burns the 3rd A.C. contactor often opens main contacts KM3-3, thereby has improved the security and stability that motor M starts.
The utility model is not limited to the foregoing description; On the basis of the disclosed technical scheme of the utility model; Those skilled in the art is according to disclosed technology contents; Do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in the protection range of the utility model.
Claims (2)
1. motor star-triangle start-up circuit; Comprise three phase mains, star-triangle commutation circuit (A); And control circuit (B); Star-triangle commutation circuit (A) is connected on the three phase mains through first circuit breaker (QF1); Control circuit (B) is connected on the three phase mains through second circuit breaker (QF2); Said three phase mains is given the power supply of star-triangle commutation circuit (A) and control circuit (B) respectively; What said star-triangle commutation circuit (A) comprised first A.C. contactor that is connected in series often drives main contacts (KM1-2), motor (M), overload relay (FR1); The main contacts (KM2-2) of often opening of this series arm and second A.C. contactor is connected between the normally closed main contacts (KM3-3) of first breaker contact point (QF1) and the 3rd contactor after parallelly connected; It is characterized in that; Said control circuit (B) comprises first branch road and second branch road; First branch road comprises the main coil of often driving auxilliary contact (KM1-1), first A.C. contactor (KM1) of first A.C. contactor that order links to each other; Said first A.C. contactor (KM1) across has the normally closed auxilliary contact (KM3-2) of the 3rd A.C. contactor that is cascaded, the main coil of second A.C. contactor (KM2); Said second branch road comprises start button (SB2), the normally closed auxilliary contact (KM2-1) of second A.C. contactor and the main coil of the time relay (KT1) that order links to each other; The said time relay (KT1) main coil across has the normally closed time-delay break contact (KT1-1) of the time relay that is cascaded and the main coil of the 3rd A.C. contactor (KM3), said first branch road with after second branch road is parallelly connected and the normally-closed contact (FR1-1) of stop button (SB1), overload relay be connected between the both positive and negative polarity of second circuit breaker (QF2), the electrode points cross-over connection has the 3rd A.C. contactor often to open auxilliary contact (KM3-1) between the normally closed time-delay break contact (KT1-1) of the electrode points between the normally closed auxilliary contact (KM3-2) of often driving auxilliary contact (KM1-1), the 3rd A.C. contactor of said first A.C. contactor and the normally closed auxilliary contact (KM2-1) of second A.C. contactor, the time relay.
2. motor star according to claim 1-triangle start-up circuit is characterized in that: the main coil across of said second A.C. contactor (KM2) has indicator light (HL1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202616715U CN202160137U (en) | 2011-07-22 | 2011-07-22 | Motor star-triangle start circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202616715U CN202160137U (en) | 2011-07-22 | 2011-07-22 | Motor star-triangle start circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202160137U true CN202160137U (en) | 2012-03-07 |
Family
ID=45767759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202616715U Expired - Fee Related CN202160137U (en) | 2011-07-22 | 2011-07-22 | Motor star-triangle start circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202160137U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790643A (en) * | 2016-05-03 | 2016-07-20 | 梁正 | Three-phase alternating-current asynchronous motor, starting method and apparatus thereof |
| CN107959443A (en) * | 2017-12-31 | 2018-04-24 | 广州市大弘自动化科技有限公司 | A kind of motor star triangle start control circuit |
| CN108361185A (en) * | 2017-11-30 | 2018-08-03 | 陈红球 | A kind of the startup control method and startup control system of air compressor machine |
| CN109863691A (en) * | 2016-10-31 | 2019-06-07 | 三菱电机株式会社 | The control method of air conditioner and air conditioner |
-
2011
- 2011-07-22 CN CN2011202616715U patent/CN202160137U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790643A (en) * | 2016-05-03 | 2016-07-20 | 梁正 | Three-phase alternating-current asynchronous motor, starting method and apparatus thereof |
| CN105790643B (en) * | 2016-05-03 | 2018-06-01 | 梁正 | Three-phase AC asynchronous motor and its startup method and apparatus |
| CN109863691A (en) * | 2016-10-31 | 2019-06-07 | 三菱电机株式会社 | The control method of air conditioner and air conditioner |
| CN108361185A (en) * | 2017-11-30 | 2018-08-03 | 陈红球 | A kind of the startup control method and startup control system of air compressor machine |
| CN107959443A (en) * | 2017-12-31 | 2018-04-24 | 广州市大弘自动化科技有限公司 | A kind of motor star triangle start control circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103560544B (en) | System for starting large-scale power load in micro grid | |
| CN201478875U (en) | Double-power automatic conversion cabinet | |
| CN202160137U (en) | Motor star-triangle start circuit | |
| CN204103816U (en) | Motor load change automatic control electricity-saving device | |
| CN208479171U (en) | A kind of threephase motor temperature control light current and forceful electric power isolation circuit | |
| CN104360716B (en) | Main frame and peripheral hardware switching sequence control device | |
| CN206976250U (en) | A kind of spring operating mechanism switchs leap preventing device | |
| CN203617935U (en) | Overload starting control device for low-power motor | |
| CN102683111A (en) | Intelligent composite AC contactor | |
| CN201763658U (en) | Timing control circuit for floating electric blower | |
| CN205249094U (en) | Star triangle voltage -reduction starting control circuit in rubber regeneration production technology | |
| CN103762716A (en) | Auto-putting-in and auto-recovering power supply system | |
| CN203734375U (en) | Automatic charge and automatic recovery power supply system | |
| CN2701166Y (en) | Multi-motor centralized variable-frequency soft starting intelligent controller | |
| CN202696523U (en) | Motor positive/negative rotation circuit | |
| CN201374664Y (en) | Thyristor-type cam controller and reversing device and speed adjusting device thereof | |
| CN206559259U (en) | Low-pressure asynchronous motor reactive power on-site compensation device | |
| CN212084919U (en) | Electric control device of compressor unit | |
| CN219458931U (en) | Star-delta step-down starting control circuit controlled by current relay | |
| CN201325818Y (en) | Lifting electromagnet rectifier control device controlled by only one alternating current contactor | |
| CN201467040U (en) | Auto-coupling voltage-reduction starting control device | |
| CN204203860U (en) | Main frame and peripheral hardware switching sequence control device | |
| CN203813426U (en) | Tripping protector for circuit breaker | |
| CN217486409U (en) | Mixer system control circuit | |
| CN203617937U (en) | Dual-motor star-delta starting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120307 Termination date: 20170722 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |