CN2857320Y - Three-phase asynchronous dynamo able to limit starting current - Google Patents
Three-phase asynchronous dynamo able to limit starting current Download PDFInfo
- Publication number
- CN2857320Y CN2857320Y CNU2005200481775U CN200520048177U CN2857320Y CN 2857320 Y CN2857320 Y CN 2857320Y CN U2005200481775 U CNU2005200481775 U CN U2005200481775U CN 200520048177 U CN200520048177 U CN 200520048177U CN 2857320 Y CN2857320 Y CN 2857320Y
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- starting current
- motor
- asynchronous machine
- machine
- limit starting
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Abstract
The utility model relates to an electric engine, more specifically, to a three-phase asynchronous machine capable of limiting the startup current. The three-phase asynchronous machine capable of limiting the startup current is characterized in that the machine joint-box is equipped with AC contactors KM1 and KM2 inside and time relay KT. When the power supply is introduced into the machine, KM1 first powers on and the machine is started up in Y-mode connection. After the time relay KT is delayed, KM1 powers off and KM2 powers on and the machine is started up in triangle-mode. In comparison with direct startup of the conventional three-phase asynchronous machine, the startup current of the machine in the utility model is only one third of the former.
Description
Technical field
The utility model relates to motor, especially a kind of threephase asynchronous machine that can limit starting current.
Background technology
As everyone knows, in various threephase asynchronouses, capacity is hour direct startup method of general employing at present.When capacity motor is big, often adopt various reduced-voltage startings or soft start or variable frequency starting.In various reduced-voltage startings, because " Y-Δ " startup input is low, method is simple, has therefore obtained certain application in No Load Start or light-load starting.But require the user of service to remove to determine, purchase " Y-Δ " starter that is fit to after all, increased certain degree of difficulty for the motor user of service.
Summary of the invention
The purpose of this utility model provides a kind of threephase asynchronous machine that can limit starting current, compares with common AC asynchronous motor, and this motor has suppressed starting current.When the starting current of motor is reduced to direct startup the 1/3rd.
The purpose of this utility model is achieved in that a kind of threephase asynchronous machine that can limit starting current, it is characterized in that, A.C. contactor KM1, KM2 and time relay KT are housed in the connection box for motor.
When three phase mains is introduced into motor, A.C. contactor KM1 at first electric, motor is started under " Y " connection; After time relay KT time-delay, the KM1 dead electricity, KM2 gets electric, and motor moves under " Δ " connection.
Advantage of the present utility model is as follows:
Because, the A.C. contactor and the time relay have been installed in the connection box for motor, make motor under " Y " connection, to start, under " Δ " connection, move, effectively suppressed the starting current of motor.Directly start with ordinary three-phase synchronous and to compare, starting current is reduced to original 1/3rd.
Use the motor of " Y-Δ " starter to compare with plan originally, because the utility model has possessed this function, save user's design, determined the trouble of " Y-Δ " concrete model of starter.Simultaneously, because the contactor and the time relay are installed in the connection box for motor, make electric machine structure compact and reasonable more.
Again because the installation A.C. contactor and the time relay in the terminal box can be save the terminal block in the connection box for motor, reduce the cost of motor.
Description of drawings
Accompanying drawing is an electrical schematic diagram of the present utility model.Among the figure: KM1, KM2-A.C. contactor; The KT-time relay; The head end of U1, V1, W1-three phase windings; The tail end of U2, V2, W2-three phase windings.
Embodiment
Below in conjunction with accompanying drawing in detail execution mode of the present utility model is described in detail:
A kind of threephase asynchronous machine that can limit starting current is equipped with A.C. contactor KM1, KM2 and time relay KT in the connection box for motor.
Motor three phase windings have 6 terminals in terminal box.Wherein 3 tail end U2, V2, W2 link to each other with an end of A.C. contactor KM1 main contacts, and the KM1 other end is connected together, and KM1 gets that motor is connected into " Y " when electric like this.3 head end U1, V1, W1 are connected with an end of KM2 main contacts, and the KM2 other end and winding 3 tail end U2, V2, W2 link to each other respectively.Like this, when the KM1 dead electricity and KM2 gets that motor has been connected into " Δ " when electric.
The purpose of this utility model is achieved in that when power supply and introduces, when promptly three phase mains is connected to U1, V1, W1 respectively, KM1 immediately electric adhesive, motor starts under " Y " connection, has limited the starting current of motor.Through time-delay, KT time-delay break contact is opened the KM1 dead electricity; KT timing closing contact adhesive simultaneously, KM2 gets electric adhesive, and motor moves under " Δ " connection, has finished start-up course.
Claims (6)
1, a kind of threephase asynchronous machine that can limit starting current is characterized in that, the A.C. contactor and the time relay are housed in the connection box for motor.
2, a kind of threephase asynchronous machine that can limit starting current according to claim 1 is characterized in that, 2 A.C. contactor KM1, KM2 and 1 time relay KT are housed in the terminal box.
3, a kind of threephase asynchronous machine that can limit starting current according to claim 1 is characterized in that, power of motor be 4kW and more than.
4, a kind of threephase asynchronous machine that can limit starting current according to claim 1 is characterized in that, an end of A.C. contactor KM1 main contacts links to each other with U2, V2, W2, and the other end is connected together.
5, a kind of threephase asynchronous machine that can limit starting current according to claim 1 is characterized in that, an end and U1, V1, the W1 of A.C. contactor KM2 join, the other end with link to each other around U2, V2, W2.
6, a kind of threephase asynchronous machine that can limit starting current according to claim 1 is characterized in that, described motor is Y or Y2 series threephase asynchronous machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200481775U CN2857320Y (en) | 2005-12-29 | 2005-12-29 | Three-phase asynchronous dynamo able to limit starting current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200481775U CN2857320Y (en) | 2005-12-29 | 2005-12-29 | Three-phase asynchronous dynamo able to limit starting current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2857320Y true CN2857320Y (en) | 2007-01-10 |
Family
ID=37600625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200481775U Expired - Fee Related CN2857320Y (en) | 2005-12-29 | 2005-12-29 | Three-phase asynchronous dynamo able to limit starting current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2857320Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101604347B (en) * | 2009-04-17 | 2011-08-31 | 上海海事大学 | Method for building model of dual three-phase asynchronous motor based on winding complex transformation |
| 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 |
| CN104696254A (en) * | 2015-03-06 | 2015-06-10 | 徐家成 | Air feeder control method |
-
2005
- 2005-12-29 CN CNU2005200481775U patent/CN2857320Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101604347B (en) * | 2009-04-17 | 2011-08-31 | 上海海事大学 | Method for building model of dual three-phase asynchronous motor based on winding complex transformation |
| 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 |
| CN104696254A (en) * | 2015-03-06 | 2015-06-10 | 徐家成 | Air feeder control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |