CN203278713U - Improved star-delta starter with current limiting reactor - Google Patents
Improved star-delta starter with current limiting reactor Download PDFInfo
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- CN203278713U CN203278713U CN 201320308828 CN201320308828U CN203278713U CN 203278713 U CN203278713 U CN 203278713U CN 201320308828 CN201320308828 CN 201320308828 CN 201320308828 U CN201320308828 U CN 201320308828U CN 203278713 U CN203278713 U CN 203278713U
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- contactor
- current limiting
- limiting reactor
- delta starter
- motor
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Abstract
The utility model relates to a star-delta starter, and discloses an improved star-delta starter with a current limiting reactor. The improved star-delta starter with the current limiting reactor includes three-phase four-wire terminals L1, L2, L3, and N; motor M armature terminals U1, V1, W1, U2, V2, and W2; and alternating current contactors K1, K2, K3, and K4. The improved star-delta starter with the current limiting reactor also includes a current limiting reactor RT1 and a control circuit, wherein the current limiting reactor RT1 is connected over the motor M armature terminals U1, V1, W1 and the motor M armature terminals U2, V2, W2. In the improved star-delta starter with the current limiting reactor, the current limiting reactor RT1 is connected over the motor M armature terminals U1, V1, W1 and the motor M armature terminals U2, V2, W2, and an impact current, in a short switchover process from a star shape operation to a delta shape operation, is reduced by the current limiting reactor RT1, so that stable start of close-type switchover is achieved. The improved star-delta starter with the current limiting reactor has advantages of high structural reliability, convenient operation, simple overall structure, and good security.
Description
Technical field
The utility model relates to the star delta starter, has related in particular to a kind of modified model star delta starter with current limiting reactor.
Background technology
Asynchronous machine is simple in structure because of it, 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, 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 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 this star delta starter 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 lighter, can allow motor move under star connection.At this moment, nominal torque and load can be mated, and the efficient 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 large impulse current, easily causes higher level's circuit breaker trip, causes starting unsuccessfully.In the conventional star triangle start of high-power low voltage motor, impact phenomenon is more obvious.
Summary of the invention
The impulse current that the utility model causes when in prior art, star switches to triangle easily causes starting failed shortcoming, provide a kind of and can significantly reduce the switching shock electric current, realized the modified model star delta starter with current limiting reactor that steady enclosed is switched.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
A kind of modified model star delta starter with 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 and control circuit, 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 respectively A.C. contactor K1 between terminals U1, V1, W1 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, control circuit comprises A.C. contactor K1, K2, K3, K4 and time relay KT1.
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 consist of branch road 1, the normally closed interlock K3-2 series connection of A.C. contactor K4 actuating coil and A.C. contactor K3 consists of branch road 2, and the timing closing contact KT1-1 series connection of A.C. contactor K1 actuating coil and time relay KT1 consists of branch road 3.
As preferably, control circuit also comprises normally closed inching button SB2, branch road 2, branch road 3 with A.C. contactor K2 actuating coil parallel connection be connected an end and divide 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, an 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 normally open contact K2-3 and the normal moving button SB1 of making war of A.C. contactor K2 respectively.
The utility model 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 is high, and is easy to operate, and total is succinct, safe.
Description of drawings
Fig. 1 is principle scheme figure of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Embodiment 1
A kind of modified model star delta starter with 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 and control circuit, 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 respectively A.C. contactor K1 between terminals U1, V1, W1 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 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.
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.
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 consist of branch road 1, the normally closed interlock K3-2 series connection of A.C. contactor K4 actuating coil and A.C. contactor K3 consists of branch road 2, and the timing closing contact KT1-1 series connection of A.C. contactor K1 actuating coil and time relay KT1 consists of branch road 3.
Branch road 2, branch road 3 with A.C. contactor K2 actuating coil parallel connection be connected an end and divide 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, an 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 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 utility model comprises the following 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, first often open main contact K3-1 for three groups of closed A.C. contactor K3, three groups of A.C. contactor K3 often leave after 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 begins timing 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 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 in start-up course, motor M is not cut off the power supply, and has limited the impulse current when switching, and realizes steadily switching.
Annotate: motor M 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 is only preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (9)
1. modified model star delta starter with 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 and control circuit, current limiting reactor RT1 is connected across the motor M electricity and drives between terminals U1, V1, W1 and U2, V2, W2.
2. a kind of modified model star delta starter with 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 respectively A.C. contactor K1 between terminals U1, V1, W1 and often open main contact K1-1.
3. a kind of modified model star delta starter with 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. a kind of modified model star delta starter with 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. a kind of modified model star delta starter with 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. a kind of modified model star delta starter with 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. a kind of modified model star delta starter with current limiting reactor according to claim 1, it is characterized in that: control circuit comprises A.C. contactor K1, K2, K3, K4 and time relay KT1.
8. a kind of modified model star delta starter with current limiting reactor according to claim 7, 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 consists of branch road 1 again, the normally closed interlock K3-2 series connection of A.C. contactor K4 actuating coil and A.C. contactor K3 consists of branch road 2, and the timing closing contact KT1-1 series connection of A.C. contactor K1 actuating coil and time relay KT1 consists of branch road 3.
9. a kind of modified model star delta starter with current limiting reactor according to claim 8, it is characterized in that: control circuit also comprises normally closed inching button SB2, branch road 2, after branch road 3 and the parallel connection of A.C. contactor K2 actuating coil an end divide two-way respectively with the normally open contact K3-3 of A.C. contactor K3, the normally open contact K2-2 of A.C. contactor K2 is in parallel with branch road 1 again after connecting, an end after parallel connection is connected with power line N, the other end after 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 |
|---|---|---|---|
| CN 201320308828 CN203278713U (en) | 2013-05-30 | 2013-05-30 | Improved star-delta starter with current limiting reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320308828 CN203278713U (en) | 2013-05-30 | 2013-05-30 | Improved star-delta starter with current limiting reactor |
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| CN203278713U true CN203278713U (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320308828 Expired - Lifetime CN203278713U (en) | 2013-05-30 | 2013-05-30 | Improved star-delta starter with current limiting reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312236A (en) * | 2013-05-30 | 2013-09-18 | 杭州福斯达实业集团有限公司 | Improved type star delta starter with current-limiting reactor |
| CN108566136A (en) * | 2018-01-23 | 2018-09-21 | 华中科技大学 | A kind of magneto winding circuit and its control method |
-
2013
- 2013-05-30 CN CN 201320308828 patent/CN203278713U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312236A (en) * | 2013-05-30 | 2013-09-18 | 杭州福斯达实业集团有限公司 | Improved type star delta starter with current-limiting reactor |
| CN103312236B (en) * | 2013-05-30 | 2015-12-23 | 杭州福斯达实业集团有限公司 | With the modified model star delta starter of current limiting reactor |
| CN108566136A (en) * | 2018-01-23 | 2018-09-21 | 华中科技大学 | A kind of magneto winding circuit and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 311199, No. 159 North East Lake Road, East Lake street, Yuhang District, Zhejiang, Hangzhou Patentee after: HANGZHOU 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 Industry Group Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
|
| CX01 | Expiry of patent term |