CN103312236A - Improved type star delta starter with current-limiting reactor - Google Patents
Improved type star delta starter with current-limiting reactor Download PDFInfo
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- CN103312236A CN103312236A CN2013102117301A CN201310211730A CN103312236A CN 103312236 A CN103312236 A CN 103312236A CN 2013102117301 A CN2013102117301 A CN 2013102117301A CN 201310211730 A CN201310211730 A CN 201310211730A CN 103312236 A CN103312236 A CN 103312236A
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Abstract
The invention relates to a star delta starter and discloses an improved type star delta starter with current-limiting reactors. The improved type star delta starter comprises a three-phase four-wire wiring terminal L1, a three-phase four-wire wiring terminal L2, a three-phase four-wire wiring terminal L3, a three-phase four-wire wiring terminal N, a motor M armature wiring terminal U1, a motor M armature wiring terminal V1, a motor M armature wiring terminal W1, a motor M armature wiring terminal U2, a motor M armature wiring terminal V2, a motor M armature wiring terminal W2, an alternating-current contactor K1, an alternating-current contactor K2, an alternating-current contactor K3 and an alternating-current contactor K4, and further comprises the current-limiting reactor TR1; and the current-limiting reactor TR1 is in bridge joint between the whole of the motor M armature wiring terminal U1, the motor M armature wiring terminal V1 and the motor M armature wiring terminal W1, and the whole of the motor M armature wiring terminal U2, the motor M armature wiring terminal V2 and the motor M armature wiring terminal W2. According to the improved type star delta starter disclosed by the invention, the current-limiting reactor TR1 is in bridge joint between the whole of the motor M armature wiring terminal U1, the motor M armature wiring terminal V1 and the motor M armature wiring terminal W1, and the whole of the motor M armature wiring terminal U2, the motor M armature wiring terminal V2 and the motor M armature wiring terminal W2, so that the current-limiting reactor TR1 can reduce impact current in a transient conversion process from star starting to delta operation, and stable starting of closed type switching is realized; and the structure is high in reliability, the operation is convenient, the whole structure is simple, and the safety is high.
Description
Technical field
The present invention relates to star triangle start device, related in particular to a kind of modified model star triangle start device with current limiting reactor.
Background technology
Asynchronous machine is simple in structure because of it, low price, reliability advantages of higher are widely used, but starting current is bigger in start-up course, so motor capacious must take certain mode to start, the star triangle start is exactly a kind of mode of reduced-voltage starting simply and easily.When adopting star triangle start mode, current characteristics is fine, and torque characteristics is relatively poor, so objective reality only is 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 this star triangle start device that starts principle, compare with any other reduced-voltage starter, 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 light, can allow motor move under star connection.At this moment, nominal torque and load can be mated, and efficiency of motor is increased, and have therefore saved power consumption.
But conventional star triangle start starts to the of short duration open type handoff procedure of triangle operation star, has very big impulse current, causes higher level's circuit breaker trip easily, causes starting failure.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 the impulse current that causes when star switches to triangle in the prior art and cause starting the shortcoming of failure easily, provide a kind of and can reduce the switching shock electric current significantly, realized the modified model star triangle start device of the band current limiting reactor that steady enclosed is switched.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
The modified model star triangle start device of band current limiting reactor, comprise three-phase and four-line terminals L1, L2, L3, N, the 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 the motor M electricity and drives between terminals U1, V1, W1 and U2, V2, W2.
As preferably, current limiting reactor RT1 and motor M electricity drive three groups of being connected in series A.C. contactor K1 between terminals U1, V1, W1 respectively and often open main contact K1-1.
As preferably, often open the power supply circuit breaker Q F1 that connecting between main contact K2-1 for three groups of three-phase terminal L1, L2, L3 and A.C. contactor K2.
As preferably, also comprise thermal relay FR1, thermal relay FR1 is serially connected in that three groups of A.C. contactor K2 often leave main contact K2-1 and the motor M electricity drives between terminals U1, V1, W1.
As preferably, often to open main contact K3-1 one end for three groups of A.C. contactor K3 and link together, the other end drives terminals U2, V2 with the motor M electricity respectively, W2 is connected.
As preferably, three groups of A.C. contactor K4 often leave main contact K4-1 one and terminate at power supply circuit breaker Q F1 and K2 three groups 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 the 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 the power line.
As preferably, connect 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 and the parallel connection of time relay KT1 actuating coil and constitute branch road 1, the normally closed interlock K3-2 series connection of A.C. contactor K4 actuating coil and A.C. contactor K3 constitutes branch road 2, and the timing closing contact KT1-1 series connection of A.C. contactor K1 actuating coil and time relay KT1 constitutes branch road 3.
As preferably, an end divides two-way respectively with in parallel with branch road 1 again after the normally open contact K2-2 of normally open contact K3-3, the A.C. contactor K2 of A.C. contactor K3 is connected after branch road 2, branch road 3 and the parallel connection of A.C. contactor K2 actuating coil, end after the parallel connection is connected with power line N, and the other end after the parallel connection divides two-way to receive normally closed inching button SB2 one end through normally open contact K2-3 and the normal moving button SB1 of making war of A.C. contactor K2 respectively.
The present invention is connected across the motor M electricity with current limiting reactor RT1 and drives between terminals U1, V1, W1 and U2, V2, W2, current limiting reactor RT1 can start to the of short duration handoff procedure of triangle operation star, reduce its impulse current, realize the smooth starting that enclosed is switched; This structural reliability height, easy to operate, total is succinct, and is safe.
Description of drawings
Fig. 1 is principle scheme figure of the present invention.
Embodiment
Describe in further detail below in conjunction with accompanying drawing and the present invention of embodiment.
Embodiment 1
The modified model star triangle start device of band current limiting reactor, as shown in Figure 1, comprise three-phase and four-line terminals L1, L2, L3, N, the 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 the motor M electricity and drives between terminals U1, V1, W1 and U2, V2, W2.
Current limiting reactor RT1 and motor M electricity drive three groups of being connected in series A.C. contactor K1 between terminals U1, V1, W1 respectively and often open main contact K1-1.
Often open the power supply circuit breaker Q F1 that connecting between main contact K2-1 for three groups of three-phase terminal L1, L2, L3 and A.C. contactor K2.
Also comprise thermal relay FR1, thermal relay FR1 is serially connected in that three groups of A.C. contactor K2 often leave main contact K2-1 and the motor M electricity drives between terminals U1, V1, W1.
Often open main contact K3-1 one end for three groups of A.C. contactor K3 and link together, the other end drives terminals U2, V2 with the motor M electricity respectively, W2 is connected.
Three groups of A.C. contactor K4 often leave main contact K4-1 one and terminate at power supply circuit breaker Q F1 and K2 three groups and often open between the main contact K2-1, and three groups of A.C. contactor K4 often leave the main contact K4-1 other end and connect the 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 the power line.
Connect 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 and the parallel connection of time relay KT1 actuating coil and constitute branch road 1, the normally closed interlock K3-2 series connection of A.C. contactor K4 actuating coil and A.C. contactor K3 constitutes branch road 2, and the timing closing contact KT1-1 series connection of A.C. contactor K1 actuating coil and time relay KT1 constitutes branch road 3.
An end divides two-way respectively with in parallel with branch road 1 again after the normally open contact K2-2 of normally open contact K3-3, the A.C. contactor K2 of A.C. contactor K3 is connected after branch road 2, branch road 3 and the parallel connection of A.C. contactor K2 actuating coil, end after the parallel connection is connected with power line N, and the other end after the parallel connection divides two-way to receive normally closed inching button SB2 one end through normally open contact K2-3 and the normal moving button SB1 of making war of A.C. contactor K2 respectively.
The course of work of the present invention may further comprise the steps:
1.) before the startup, A.C. contactor K1, K2, K3, K4 all are in off-state, the power supply circuit breaker Q of closing F1;
2. when) receiving enabled instruction, often open main contact K3-1 for three groups of closed A.C. contactor K3 earlier, three groups of A.C. contactor K3 often leave after the main contact K3-1 closure immediately three groups of auto-closing A.C. contactor K2 and often open main contact K2-1, the startup stage that motor M entering star, time relay KT1 picks up counting simultaneously;
3.) star starts when approaching end, time relay KT1 timing is to setting time, often open main contact K1-1 for three groups of auto-closing A.C. contactor K1, current limiting reactor RT1 work, three groups of A.C. contactor K1 often leave after the main contact K1-1 closure immediately three groups of automatic disconnection A.C. contactor K3 and often open main contact K3-1, after three groups of A.C. contactor K3 often leave main contact K3-1 and disconnect immediately three groups of auto-closing A.C. contactor K4 often open main contact K4-1, motor M enters the triangle operation phase;
4.) three of A.C. contactor K4 groups often open main contact K4-1 closure after, automatic disconnection time relay KT1, and often open main contact K1-1 by three groups of time relay KT1 automatic disconnection A.C. contactor K1 cuts off current limiting reactor RT1.
Wherein, motor star starts the of short duration switch step that finishes between the triangle operation, and the input of current limiting reactor RT1 has realized the enclosed switching of motor M, and namely motor M is not cut off the power supply in the start-up course, and has limited the impulse current when switching, and realizes steadily switching.
Annotate: motor is short supply interruption in conventional star triangle start handoff procedure, switches for open type, causes impulse current.
The operation principle of current limiting reactor RT1 is: the essence of current limiting reactor RT1 is inductance, and alternating current is had hindrance function, reaches the purpose of current limliting.
In a word, the above only is preferred embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (10)
1. be with the modified model star triangle start device of current limiting reactor, comprise three-phase and four-line terminals L1, L2, L3, N, the 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 the motor M electricity and drives between terminals U1, V1, W1 and U2, V2, W2.
2. the modified model star triangle start device 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 being 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 triangle start device of band current limiting reactor according to claim 1 is characterized in that: often open the power supply circuit breaker Q F1 that connecting between main contact K2-1 for three groups of three-phase terminal L1, L2, L3 and A.C. contactor K2.
4. the modified model star triangle start device 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 that three groups of A.C. contactor K2 often leave main contact K2-1 and the motor M electricity drives between terminals U1, V1, W1.
5. the modified model star triangle start device of band current limiting reactor according to claim 1, it is characterized in that: often open main contact K3-1 one end for three groups of A.C. contactor K3 and link together, the other end drives terminals U2, V2 with the motor M electricity respectively, W2 is connected.
6. the modified model star triangle start device 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 one and terminate at power supply circuit breaker Q F1 and K2 three groups 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 the motor M electricity and drive terminals U2, V2, W2.
7. the modified model star triangle start device of band current limiting reactor according to claim 1 is characterized in that: comprise that also control circuit, control circuit comprise A.C. contactor K1, K2, K3, K4 and time relay KT1.
8. the modified model star triangle start device of band current limiting reactor according to claim 7, it is characterized in that: control circuit also comprises fuse FU1, thermal relay FR1-1, normally closed inching button SB2, after three's series connection, fuse FU1 one end is connected on the power line.
9. the modified model star triangle start device of band current limiting reactor according to claim 8, it is characterized in that: connecting with the normally closed interlock K4-2 of A.C. contactor K4 after the series arm of A.C. contactor K3 actuating coil and A.C. contactor K1 normally closed interlock K1-2 and the parallel connection of time relay KT1 actuating coil constitutes branch road 1 again, the normally closed interlock K3-2 series connection of A.C. contactor K4 actuating coil and A.C. contactor K3 constitutes branch road 2, and the timing closing contact KT1-1 series connection of A.C. contactor K1 actuating coil and time relay KT1 constitutes branch road 3.
10. the modified model star triangle start device of band current limiting reactor according to claim 9, it is characterized in that: an end divides two-way respectively with in parallel with branch road 1 again after the normally open contact K2-2 of normally open contact K3-3, the A.C. contactor K2 of A.C. contactor K3 is connected after branch road 2, branch road 3 and the parallel connection of A.C. contactor K2 actuating coil, end after the parallel connection is connected with power line N, and the other end after the parallel connection divides two-way to receive normally closed inching button SB2 one end through normally open contact K2-3 and the normal moving button SB1 of making war of A.C. contactor K2 respectively.
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 |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN103312236A true CN103312236A (en) | 2013-09-18 |
| CN103312236B CN103312236B (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310211730.1A Active CN103312236B (en) | 2013-05-30 | 2013-05-30 | With the modified model star delta starter of current limiting reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452199A (en) * | 2016-10-20 | 2017-02-22 | 渤海大学 | Three-phase induction motor star-delta starter and starting method thereof |
Citations (6)
| 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 |
| 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 |
| 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 |
-
2013
- 2013-05-30 CN CN201310211730.1A patent/CN103312236B/en active Active
Patent Citations (6)
| 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 |
| 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 |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452199A (en) * | 2016-10-20 | 2017-02-22 | 渤海大学 | Three-phase induction motor star-delta starter and starting method thereof |
| CN106452199B (en) * | 2016-10-20 | 2019-01-25 | 渤海大学 | The starting method of three phase induction motor star angle starting device |
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| CN103312236B (en) | 2015-12-23 |
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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. |