CN103312236B - With the modified model star delta starter of current limiting reactor - Google Patents
With the modified model star delta starter of current limiting reactor Download PDFInfo
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- CN103312236B CN103312236B CN201310211730.1A CN201310211730A CN103312236B CN 103312236 B CN103312236 B CN 103312236B CN 201310211730 A CN201310211730 A CN 201310211730A CN 103312236 B CN103312236 B CN 103312236B
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Abstract
The present invention relates to star delta starter, disclose a kind of modified model star delta starter with current limiting reactor, comprise three-phase and four-line terminals L1, L2, L3, N, motor M electricity drives terminals U1, V1, W1, U2, V2, W2, and A.C. contactor K1, K2, K3, K4, also comprise current limiting reactor RT1, current limiting reactor RT1 is connected across motor M electricity and drives terminals U1, V1, W1 and U2, between V2, W2.Current limiting reactor RT1 is connected across motor M electricity and drives terminals U1, V1, W1 and U2, between V2, W2 by the present invention, current limiting reactor RT1 can start in the of short duration handoff procedure run to triangle star, reduce its impulse current, realize the smooth starting that enclosed switches; This structural reliability is high, easy to operate, and total is succinct, and fail safe is high.
Description
Technical field
The present invention relates to star delta starter, particularly relate to a kind of modified model star delta starter with current limiting reactor.
Background technology
Asynchronous machine is because its structure is simple, low price, high reliability are widely used, but starting current is larger in start-up course, so motor capacious must take certain mode to start, star triangle start is exactly one reduced-voltage starting mode simply and easily.When adopting star triangle start mode, current characteristics is fine, and torque characteristics is poor, so objective reality is only applicable to the occasion of zero load or light-load starting.In other words, because detent torque is little, the advantage of star triangle start is still very significant, because based on the star delta starter of this starting pinciple, compare with other reduced-voltage starter any, its structure is the simplest, and price is also the most cheap.In addition, star triangle start mode also has an advantage, namely when load is lighter, motor can be allowed to run under star connection.Now, nominal torque can be mated with load, the efficiency of motor can be made like this to increase, and therefore saved power consumption.
But conventional star triangle start starts star in the of short duration open type handoff procedure run to triangle, there is very large impulse current, easily causes higher level's circuit breaker trip, cause starting unsuccessfully.In the conventional star triangle start of high-power low voltage motor, impact phenomenon is more obvious.
Summary of the invention
The present invention is directed to star in prior art switches to the impulse current caused during triangle easily to cause starting failed shortcoming, provide one and can significantly reduce switching shock electric current, realize the modified model star delta starter of the band current limiting reactor that steady enclosed switches.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
With the modified model star delta starter of current limiting reactor, comprise three-phase and four-line terminals L1, L2, L3, N, motor M electricity drives terminals U1, V1, W1, U2, V2, W2, and A.C. contactor K1, K2, K3, K4, also comprise current limiting reactor RT1, current limiting reactor RT1 is connected across motor M electricity and drives terminals U1, V1, W1 and U2, between V2, W2.
As preferably, current limiting reactor RT1 and motor M electricity drive three groups of to be connected in series A.C. contactor K1 between terminals U1, V1, W1 respectively and often open main contact K1-1.
As preferably, three-phase terminal L1, L2, L3 and A.C. contactor K2 three groups often open the power supply circuit breaker Q F1 that to connect between main contact K2-1.
As preferably, also comprise thermal relay FR1, thermal relay FR1 is serially connected in three groups of A.C. contactor K2 and often opens main contact K2-1 and motor M electricity drives between terminals U1, V1, W1.
As preferably, often open main contact K3-1 one end and link together for three groups of A.C. contactor K3, the other end drives terminals U2, V2, W2 with motor M electricity respectively and is connected.
As preferably, three groups of A.C. contactor K4 often leave main contact K4-1 mono-end and are connected on three groups of power supply circuit breaker Q F1 and K2 and often open between main contact K2-1, and three groups of A.C. contactor K4 often leave the main contact K4-1 other end and connect motor M electricity and drive terminals U2, V2, W2.
As preferably, also comprise control circuit, control circuit comprises A.C. contactor K1, K2, K3, K4 and time relay KT1.
As preferably, control circuit also comprises fuse FU1, thermal relay FR1-1, normally closed inching button SB2, and after three's series connection, fuse FU1 one end is connected on power line.
As preferably, branch road 1 in series with the normally closed interlock K4-2 of A.C. contactor K4 again after the series arm of A.C. contactor K3 actuating coil and A.C. contactor K1 normally closed interlock K1-2 is in parallel with time relay KT1 actuating coil, the normally closed interlock K3-2 branch road 2 in series of A.C. contactor K4 actuating coil and A.C. contactor K3, the timing closing contact KT1-1 branch road 3 in series of A.C. contactor K1 actuating coil and time relay KT1.
As preferably, branch road 2, branch road 3 are in parallel with branch road 1 again after dividing two-way to be connected with the normally open contact K3-3 of A.C. contactor K3, the normally open contact K2-2 of A.C. contactor K2 respectively with one end after the parallel connection of A.C. contactor K2 actuating coil, one end after parallel connection is connected with power line N, and the other end after parallel connection divides two-way to receive normally closed inching button SB2 one end through the normally open contact K2-3 of A.C. contactor K2 and Chang Kai inching button SB1 respectively.
Current limiting reactor RT1 is connected across motor M electricity and drives terminals U1, V1, W1 and U2, between V2, W2 by the present invention, current limiting reactor RT1 can start in the of short duration handoff procedure run to triangle star, reduce its impulse current, realize the smooth starting that enclosed switches; This structural reliability is high, easy to operate, and total is succinct, and fail safe is high.
Accompanying drawing explanation
Fig. 1 is principle scheme figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment 1
With the modified model star delta starter of current limiting reactor, as shown in Figure 1, comprise three-phase and four-line terminals L1, L2, L3, N, motor M electricity drives terminals U1, V1, W1, U2, V2, W2, and A.C. contactor K1, K2, K3, K4, also comprise current limiting reactor RT1, current limiting reactor RT1 is connected across motor M electricity and drives terminals U1, V1, W1 and U2, between V2, W2.
Current limiting reactor RT1 and motor M electricity drive three groups of to be connected in series A.C. contactor K1 between terminals U1, V1, W1 respectively and often open main contact K1-1.
Three-phase terminal L1, L2, L3 and A.C. contactor K2 three groups often open the power supply circuit breaker Q F1 that to connect between main contact K2-1.
Also comprise thermal relay FR1, thermal relay FR1 is serially connected in three groups of A.C. contactor K2 and often opens main contact K2-1 and motor M electricity drives between terminals U1, V1, W1.
Often open main contact K3-1 one end and link together for three groups of A.C. contactor K3, the other end drives terminals U2, V2, W2 with motor M electricity respectively and is connected.
Three groups of A.C. contactor K4 often leave main contact K4-1 mono-end and are connected on three groups of power supply circuit breaker Q F1 and K2 and often open between main contact K2-1, and three groups of A.C. contactor K4 often leave the main contact K4-1 other end and connect motor M electricity and drive terminals U2, V2, W2.
Also comprise control circuit, control circuit comprises A.C. contactor K1, K2, K3, K4 and time relay KT1.
Control circuit also comprises fuse FU1, thermal relay FR1-1, normally closed inching button SB2, and after three's series connection, fuse FU1 one end is connected on power line.
Branch road 1 in series with the normally closed interlock K4-2 of A.C. contactor K4 again after the series arm of A.C. contactor K3 actuating coil and A.C. contactor K1 normally closed interlock K1-2 is in parallel with time relay KT1 actuating coil, the normally closed interlock K3-2 branch road 2 in series of A.C. contactor K4 actuating coil and A.C. contactor K3, the timing closing contact KT1-1 branch road 3 in series of A.C. contactor K1 actuating coil and time relay KT1.
Branch road 2, branch road 3 are in parallel with branch road 1 again after dividing two-way to be connected with the normally open contact K3-3 of A.C. contactor K3, the normally open contact K2-2 of A.C. contactor K2 respectively with one end after the parallel connection of A.C. contactor K2 actuating coil, one end after parallel connection is connected with power line N, and the other end after parallel connection divides two-way to receive normally closed inching button SB2 one end through the normally open contact K2-3 of A.C. contactor K2 and Chang Kai inching button SB1 respectively.
The course of work of the present invention comprises the following steps:
1. before) starting, A.C. contactor K1, K2, K3, K4 are all in off-state, and close power supply circuit breaker Q F1;
2. when) receiving enabled instruction, first often open main contact K3-1 for three groups of closed A.C. contactor K3, three groups of A.C. contactor K3 often open main contact K3-1 close after immediately automatically three groups of closed A.C. contactor K2 often open main contact K2-1, the startup stage that motor M entering star, time relay KT1 starts timing simultaneously;
3.) star start close at the end of, time relay KT1 timing is to setting time, automatically main contact K1-1 is often opened for three groups of closed A.C. contactor K1, current limiting reactor RT1 works, three groups of A.C. contactor K1 often leave three groups of automatically to disconnect A.C. contactor K3 after main contact K1-1 closes immediately and often open main contact K3-1, three groups of A.C. contactor K3 often open main contact K3-1 disconnect after immediately automatically three groups of closed A.C. contactor K4 often open main contact K4-1, motor M enters the triangle operation phase;
4.) three groups of A.C. contactor K4 often open main contact K4-1 closed after, relay K T1, and automatically disconnected three groups of A.C. contactor K1 by time relay KT1 and often opened main contact K1-1 automatic opening time, was cut off by current limiting reactor RT1.
Wherein, motor star starts the of short duration switch step between end to triangle operation, and the input of current limiting reactor RT1 achieves the enclosed switching of motor M, i.e. motor M not power-off in start-up course, and impulse current when limiting switching, realizes steadily switching.
Note: motor is short supply interruption in conventional star triangle start handoff procedure, for open type switches, causes impulse current.
The operation principle of current limiting reactor RT1 is: the essence of current limiting reactor RT1 is inductance, has hindrance function to alternating current, reaches the object of current limliting.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (6)
1. be with the modified model star delta starter of current limiting reactor, comprise three-phase and four-line terminals L1, L2, L3, N, motor M electricity drives terminals U1, V1, W1, U2, V2, W2, and A.C. contactor K1, K2, K3, K4, it is characterized in that: also comprise current limiting reactor RT1, current limiting reactor RT1 is connected across motor M electricity and drives terminals U1, V1, W1 and U2, between V2, W2; Also comprise control circuit, control circuit comprises A.C. contactor K1, K2, K3, K4 and time relay KT1;
Control circuit also comprises fuse FU1, thermal relay FR1-1, normally closed inching button SB2, and after three's series connection, fuse FU1 one end is connected on power line; Branch road 1 in series with the normally closed interlock K4-2 of A.C. contactor K4 again after the series arm of A.C. contactor K3 actuating coil and A.C. contactor K1 normally closed interlock K1-2 is in parallel with time relay KT1 actuating coil, the normally closed interlock K3-2 branch road 2 in series of A.C. contactor K4 actuating coil and A.C. contactor K3, the timing closing contact KT1-1 branch road 3 in series of A.C. contactor K1 actuating coil and time relay KT1;
Branch road 2, branch road 3 are in parallel with branch road 1 again after dividing two-way to be connected with the normally open contact K3-3 of A.C. contactor K3, the normally open contact K2-2 of A.C. contactor K2 respectively with one end after the parallel connection of A.C. contactor K2 actuating coil, one end after parallel connection is connected with power line N, and the other end after parallel connection divides two-way to receive normally closed inching button SB2 one end through the normally open contact K2-3 of A.C. contactor K2 and Chang Kai inching button SB1 respectively.
2. the modified model star delta starter of band current limiting reactor according to claim 1, is characterized in that: current limiting reactor RT1 and motor M electricity drive three groups of to be connected in series A.C. contactor K1 between terminals U1, V1, W1 respectively and often open main contact K1-1.
3. the modified model star delta starter of band current limiting reactor according to claim 1, is characterized in that: three-phase terminal L1, L2, L3 and A.C. contactor K2 three groups often open the power supply circuit breaker Q F1 that to connect between main contact K2-1.
4. the modified model star delta starter of band current limiting reactor according to claim 1, it is characterized in that: also comprise thermal relay FR1, thermal relay FR1 is serially connected in three groups of A.C. contactor K2 and often opens main contact K2-1 and motor M electricity drives between terminals U1, V1, W1.
5. the modified model star delta starter of band current limiting reactor according to claim 1, is characterized in that: often open main contact K3-1 one end and link together for three groups of A.C. contactor K3, the other end drives terminals U2, V2, W2 with motor M electricity respectively and is connected.
6. the modified model star delta starter of band current limiting reactor according to claim 3, it is characterized in that: three groups of A.C. contactor K4 often leave main contact K4-1 mono-end and are connected on three groups of power supply circuit breaker Q F1 and K2 and often open between main contact K2-1, three groups of A.C. contactor K4 often leave the main contact K4-1 other end and connect motor M electricity and drive terminals U2, V2, W2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310211730.1A CN103312236B (en) | 2013-05-30 | 2013-05-30 | With the modified model star delta starter of current limiting reactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310211730.1A CN103312236B (en) | 2013-05-30 | 2013-05-30 | With the modified model star delta starter of current limiting reactor |
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| CN103312236A CN103312236A (en) | 2013-09-18 |
| CN103312236B true CN103312236B (en) | 2015-12-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106452199B (en) * | 2016-10-20 | 2019-01-25 | 渤海大学 | The starting method of three phase induction motor star angle starting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2123836U (en) * | 1991-12-06 | 1992-12-02 | 陈正中 | Closed circuit converting star-threeangle stator |
| CN201869142U (en) * | 2010-12-07 | 2011-06-15 | 河南省电力公司许昌供电公司 | Energy-saving asynchronous machine Y-Delta reduced-voltage start control cabinet |
| CN202872702U (en) * | 2012-09-13 | 2013-04-10 | 常熟市森源电气科技有限公司 | Star-delta close-type switching stator with microcomputer protection |
| CN203278713U (en) * | 2013-05-30 | 2013-11-06 | 杭州福斯达实业集团有限公司 | Improved star-delta starter with current limiting reactor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11225492A (en) * | 1998-02-03 | 1999-08-17 | Yaskawa Electric Corp | Starter of induction motor |
| JP2000116164A (en) * | 1998-10-02 | 2000-04-21 | Fuji Electric Co Ltd | Star-delta starting apparatus for induction motor |
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2013
- 2013-05-30 CN CN201310211730.1A patent/CN103312236B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2123836U (en) * | 1991-12-06 | 1992-12-02 | 陈正中 | Closed circuit converting star-threeangle stator |
| CN201869142U (en) * | 2010-12-07 | 2011-06-15 | 河南省电力公司许昌供电公司 | Energy-saving asynchronous machine Y-Delta reduced-voltage start control cabinet |
| CN202872702U (en) * | 2012-09-13 | 2013-04-10 | 常熟市森源电气科技有限公司 | Star-delta close-type switching stator with microcomputer protection |
| CN203278713U (en) * | 2013-05-30 | 2013-11-06 | 杭州福斯达实业集团有限公司 | Improved star-delta starter with current limiting reactor |
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| CN103312236A (en) | 2013-09-18 |
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Address after: 311199, No. 159 North East Lake Road, East Lake street, Yuhang District, Zhejiang, Hangzhou Patentee after: ZHEJIANG FORTUNE CRYOGENIC EQUIPMENT CO., LTD. Address before: 311100 Hangzhou, Yuhang, East Lake District, East Lake street, North Road, No. 159, No. Patentee before: Hangzhou Fortune Group Co., Ltd. |