CN201541220U - Electric motor Y-delta starting equipment - Google Patents
Electric motor Y-delta starting equipment Download PDFInfo
- Publication number
- CN201541220U CN201541220U CN2009202765248U CN200920276524U CN201541220U CN 201541220 U CN201541220 U CN 201541220U CN 2009202765248 U CN2009202765248 U CN 2009202765248U CN 200920276524 U CN200920276524 U CN 200920276524U CN 201541220 U CN201541220 U CN 201541220U
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- Prior art keywords
- contactor
- alternating current
- time relay
- current contactor
- coil
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Abstract
The present utility model discloses an electric motor Y-delta starting equipment comprising the first alternating current contactor, the second alternating current contactor, the third alternating current contactor and a control loop. The control loop comprises a coil branch of the first alternating current contactor, a coil branch of the third alternating current contactor, a coil branch of the first time relay, a coil branch of the second alternating current contactor, the second time relay, and the fourth branch parallel with the coil branch of the first alternating current contactor. Normally close contacts of time delay of the second time relay are connected in the coil branch of the first alternating current contactor in series, normally open contacts of the first time relay are connected in the coil branch of the third alternating current contactor in series, and the normally open contacts of the third alternating current contactor are connected with the coil of the second time relay in series and are then connected with the normally open contacts of time delay of the first time relay in series, forming the fourth branch. According to the utility model, an electric motor is capable of running reliably in safety at a time of Y-delta, and the electric motor Y-delta starting equipment has advantages of low cost and convenient operations and maintenance.
Description
Technical field
The utility model relates to the motor protection technical field, relates in particular to the starting device of a kind of motor Y-△ (star switching triangle).
Background technology
In the prior art, motor Y-△ starts common wiring as shown in Figure 1, free relay K T, the 3rd A.C. contactor KY tripping in the time of in the use, and main contact melting welding, open circuit tripping operation and motor overheating spring burning accident take place.Find that through searching reason this kind traditional wired mode has following weak point:
(1) motor can not convert △ (triangle) to and connects and be in low-pressure operation.Faults such as the coil KT-1 broken string of time relay KT or short circuit cause the time tripping, or the overcurrent that causes because of motor load, the 3rd main noddle on contactor KY disconnect the moment arc light and form electric discharge phenomena and the reasons such as phase fault electric current that cause produce high temperature and cause the 3rd main noddle on contactor KY melting welding etc., cause motor Y (star) to connect to convert to behind the reduced voltage starting △ to connect and be in low-pressure operation, make the overheated at short notice overtemperature of motor and burn.
Blow-out and arcing appear in moment that (2) the 3rd main noddle on contactor KY disconnect easily.Though the starting current during motor Y-△ reduced voltage starting is 1/3 of direct-on-line starting, starting current is still much larger than rated current.The 3rd main noddle on contactor KY disconnects the moment blow-out and may form electric discharge phenomena with the second main noddle on contactor K △ moment arcing of closing and cause the arc short-circuit electric current, and this short circuit current can make that the 3rd contactor and second contactor burn, circuit breaker trip.
(3) the 3rd main noddle on contactor KY are the same period not.When the 3rd main noddle on contactor KY has any phase phase failure, motor is incured loss through delay phase shortage starting (motor can't start usually) produce; In addition, if the 3rd main noddle on contactor KY contacts bad or same period not, this phase contact may burn, and make the melting welding of KY main contact.
The utility model content
The purpose of this utility model provides a kind of starting device of motor that can make motor safe and reliable operation when Y-△ starts.
The utility model adopts following technical proposals:
The utility model motor Y-△ starting device has been realized reducing the electric current that flows through the 3rd contactor main contacts when Y connects starting, has prevented to cause greatly because of starting current the problem of its contact melted; And solved because of a variety of causes causes motor Y to connect conversion not become △ to connect to be in low-pressure operation, make the problem that overheated overtemperature burns in the motor short time, thereby motor is moved safely and reliably, avoided motor Y to connect to convert to after the starting △ to connect and be in low pressure operation, burn the generation of motor accident.The utility model changes the 3rd main noddle on contactor KY into triangle and connects mode, has reduced the electric current that its main contact KY flows through and has avoided the phase shortage starting, thereby made motor safety, operation reliably.The utility model cost is low, reliable in a word, operation and maintenance convenient, is worthy to be popularized.
Description of drawings
Fig. 1 is conventional motors Y-△ starting principle figure;
Fig. 2 is the utility model motor Y-△ starting principle figure.
Embodiment
As shown in Figure 2, the utility model starting device of motor comprises first A.C. contactor, second A.C. contactor and the 3rd A.C. contactor, also include control loop, comprise the first ac contactor coil KM-1 branch road, the 3rd ac contactor coil KY-1 branch road, very first time relay coil KT1-1 branch road, second ac contactor coil K △-1 branch road and the 4th branch road in the control loop, the time-delay normally-closed contact KT2-2 of second time relay is connected in series with the first ac contactor coil KM-1 and constitutes the first ac contactor coil KM-1 branch road; Also be serially connected with the normally opened contact KT1-4 of very first time relay in the 3rd ac contactor coil KY-1 branch road; The 4th branch road is connected in parallel on the first ac contactor coil KM-1 branch road two ends, and the normally opened contact KY-3 of the 4th route the 3rd A.C. contactor is connected in series the time-delay normally opened contact KT1-5 that is connected in series very first time relay behind the coil KT2-1 of second time relay again and constitutes.
As shown in Figure 2, after pressing starting button ST, the first ac contactor coil KM-1 gets, the closed self-locking of its normally opened contact KM-2, the very first time, relay coil KT1-1 got, after its normally opened contact KT1-4 closure, motor could Y connect reduced voltage starting, has effectively prevented from can't convert △ to and connect and be in low-pressure operation when time relay broken string, short circuit etc. cause that tripping causes.After very first time relay time-delay normally-closed contact KT1-2 time-delay disconnects, the 3rd ac contactor coil KY-1 dead electricity, its normally-closed contact KY-2 closure, very first time relay time-delay normally opened contact KT1-3 closure, the second ac contactor coil K △-1, its normally opened contact K △-3 gets electric and self-locking, and this moment, motor △ connect operation.On the other hand, if the 3rd A.C. contactor main contact KY melting welding, then its normally open contact KY-2 is at open position, and then the second ac contactor coil K △-1 can not get electricly, and then motor Y connects and can not convert △ to behind the reduced voltage starting and connect running; And this moment, the 3rd A.C. contactor normally-closed contact KY-3 closed the position; very first time relay time-delay normally opened contact KT1-5 closure; the second time relay coil KT2-1 gets; its time-delay normally-closed contact KT2-2 time-delay disconnects; the first ac contactor coil KM-1 dead electricity; motor M stops, and has avoided motor Y to connect operation, has played protective effect.
As shown in Figure 2, the 3rd A.C. contactor three-phase main contact KY contact is regarded load as, then its triangularity connection.When the balanced load triangle connects, phase current equals 1/ √ 3 of line current, this shows, the electric current that the 3rd A.C. contactor main contact KY bears behind the reconfiguration is 1/ √ 3 before the reconfiguration, prolong the useful life of the 3rd A.C. contactor, reduced the generation of melting welding accident.If the 3rd A.C. contactor main contact KY has any one bad, the not same period or the phase failure that contact, and its three groups of main contacts are still short circuit, motor can realize that still Y connects reduced voltage starting, has avoided the starting of motor phase shortage.
Claims (2)
1. motor Y-delta starting device, comprise first A.C. contactor, second A.C. contactor and the 3rd A.C. contactor, also include control loop, comprise the first ac contactor coil branch road in the control loop, the 3rd ac contactor coil branch road, the very first time relay coil branch road and the second ac contactor coil branch road, it is characterized in that: also include second time relay and the 4th branch road that is connected in parallel on the first ac contactor coil branch road two ends in the described control loop, the time-delay normally-closed contact of second time relay is serially connected in the first ac contactor coil branch road; Also be serially connected with the normally opened contact of very first time relay in the 3rd ac contactor coil branch road; The normally opened contact of the 4th route the 3rd A.C. contactor is connected in series the time-delay normally opened contact that is connected in series very first time relay behind the coil of second time relay again and constitutes.
2. motor Y-delta starting device according to claim 1 is characterized in that: the main contact of described the 3rd A.C. contactor is a delta connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202765248U CN201541220U (en) | 2009-12-04 | 2009-12-04 | Electric motor Y-delta starting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202765248U CN201541220U (en) | 2009-12-04 | 2009-12-04 | Electric motor Y-delta starting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201541220U true CN201541220U (en) | 2010-08-04 |
Family
ID=42592671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202765248U Expired - Fee Related CN201541220U (en) | 2009-12-04 | 2009-12-04 | Electric motor Y-delta starting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201541220U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624296A (en) * | 2011-01-27 | 2012-08-01 | 珠海格力电器股份有限公司 | Star-delta starting circuit and air conditioner with same |
| CN102684568A (en) * | 2012-05-31 | 2012-09-19 | 襄垣县树元电器有限公司 | Star-like triangular delay conversion control device |
| CN102868140A (en) * | 2012-09-07 | 2013-01-09 | 常熟市森源电气科技有限公司 | Overload alarming device for power transformer |
| CN103501068A (en) * | 2013-09-22 | 2014-01-08 | 陕西航空电气有限责任公司 | Evaporation and circulating refrigeration medium-frequency inductor electromotor |
| CN105490615A (en) * | 2014-10-11 | 2016-04-13 | 车王电子股份有限公司 | Variable structure motor and drive circuit thereof |
-
2009
- 2009-12-04 CN CN2009202765248U patent/CN201541220U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624296A (en) * | 2011-01-27 | 2012-08-01 | 珠海格力电器股份有限公司 | Star-delta starting circuit and air conditioner with same |
| CN102684568A (en) * | 2012-05-31 | 2012-09-19 | 襄垣县树元电器有限公司 | Star-like triangular delay conversion control device |
| CN102868140A (en) * | 2012-09-07 | 2013-01-09 | 常熟市森源电气科技有限公司 | Overload alarming device for power transformer |
| CN103501068A (en) * | 2013-09-22 | 2014-01-08 | 陕西航空电气有限责任公司 | Evaporation and circulating refrigeration medium-frequency inductor electromotor |
| CN103501068B (en) * | 2013-09-22 | 2016-02-24 | 陕西航空电气有限责任公司 | A kind of evaporation circulating cooling medium frequency induction motor |
| CN105490615A (en) * | 2014-10-11 | 2016-04-13 | 车王电子股份有限公司 | Variable structure motor and drive circuit thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: XUCHANG POWER SUPPLY COMPANY, STATE GRID HUNAN ELECTRIC POWER COMPANY Effective date: 20131211 Owner name: XUCHANG POWER SUPPLY COMPANY, STATE GRID HUNAN ELE Effective date: 20131211 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: XUCHANG POWER SUPPLY COMPANY, STATE GRID HUNAN ELE Free format text: FORMER NAME: XUCHANG POWER SUPPLY COMPANY OF HENAN ELECTRIC POWER COMPANY;XJ ELECTRIC CO., LTD. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 461000 XUCHANG, HENAN PROVINCE TO: 100031 XICHENG, BEIJING |
|
| CP01 | Change in the name or title of a patent holder |
Address after: No. 288 Xuchang City, Henan province 461000 City Road Patentee after: XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Address before: No. 288 Xuchang City, Henan province 461000 City Road Patentee before: Xuchang Power Supply Company of Henan Electric Power Co. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131211 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Address before: No. 288 Xuchang City, Henan province 461000 City Road Patentee before: XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 Termination date: 20181204 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |