CN204810181U - A control circuit for motor reduced -voltage starting - Google Patents
A control circuit for motor reduced -voltage starting Download PDFInfo
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- CN204810181U CN204810181U CN201520513146.6U CN201520513146U CN204810181U CN 204810181 U CN204810181 U CN 204810181U CN 201520513146 U CN201520513146 U CN 201520513146U CN 204810181 U CN204810181 U CN 204810181U
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- relay
- primary coil
- electrically connected
- coil
- phase mains
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- Control Of Ac Motors In General (AREA)
Abstract
The utility model provides a control circuit for motor reduced -voltage starting belongs to motor technical field. Control circuit application scope that it had solved current motor reduced -voltage starting is low, the motor switches in the twinkling of an eye technical problem such as decompression at voltage. This control circuit includes motor starting contactor KM1, transformer, relay KA1, relay KA2, relay KA3, relay KA4, relay KA5, relay KA6 and motor M. The utility model discloses utilizing the electromagnetic induction principle, switching the pressure regulating of taking a percentage with traditional transformer and combine together with the pressure regulating of compensation formula, the transformer is first through changing, secondary coil's ratioturn, adjusts the offset voltage to regulated output voltage reaches the purpose of reduced -voltage starting, switches the problem of decompression in the twinkling of an eye and eliminated the motor at voltage.
Description
Technical field
The utility model belongs to technical field of motors, relates to a kind of control circuit for electric machine step-down starting.
Background technology
Electric motor starting electric current is similar to and is directly proportional to the voltage of stator, the way reducing stator voltage therefore will be adopted to carry out limiting starting current, be reduced-voltage starting; Reduced-voltage starting is more common in middle low power motor, reduced-voltage starting method common at present has star triangle start and autotransformer reduced-voltage starting, and the former can be used for frequent starting but detent torque is low, inapplicable and heavy load starting, the latter's detent torque is high, can heavy load starting but cannot frequent starting; Meanwhile, the torque shock ends both existed when starting is comparatively large, the shortcoming of voltage switching moment motor decompression.
Therefore, those skilled in the art be devoted to exploitation a kind of applied widely, eliminate the control circuit of motor in voltage switching instantaneous loss of pressure problem.
Summary of the invention
The problems referred to above that the utility model exists for existing technology, provide a kind of control circuit for electric machine step-down starting, technical problem to be solved in the utility model is: how to eliminate the problem of motor at voltage switching instantaneous loss of pressure.
The purpose of this utility model realizes by following technical proposal:
A kind of control circuit for electric machine step-down starting, it is characterized in that, described control circuit comprises electric motor starting contactor KM1, transformer, relay K A1, relay K A2, relay K A3, relay K A4, relay K A5, relay K A6 and motor M, described electric motor starting contactor KM1 is electrically connected with three phase mains and transformer respectively, and described transformer comprises secondary coil N1, primary coil N2 and primary coil N3; One end of described relay K A1 is electrically connected with described three phase mains, and the other end of described relay K A1 is electrically connected with the upper end of described primary coil N2; One end of described relay K A2 is electrically connected with described three phase mains, and the other end of described relay K A2 is electrically connected with the lower end of described primary coil N2 and one end of described relay K A4 respectively; One end of described relay K A3 is electrically connected with described three phase mains, and the other end of described relay K A3 is electrically connected with one end of described relay K A4; The other end of described relay K A4 is electrically connected with the upper end of described primary coil N3; In parallel and the one end of described relay K A5 of described relay K A5 and described relay K A6 is electrically connected with described three phase mains, and the other end of described relay K A5 is electrically connected with the lower end of described primary coil N3; The upper end of described secondary coil N1 is electrically connected with described electric motor starting contactor KM1, and the lower end of described secondary coil N1 is electrically connected with described motor M.
Above-mentioned a kind of in the control circuit of electric machine step-down starting, described secondary coil N1 comprises the first secondary coil, second subprime coil and for the third time level coil, described primary coil N2 comprises the first primary coil, second primary coil and the 3rd primary coil, described primary coil N3 comprises the 4th primary coil, 5th primary coil and the 6th primary coil, described first secondary coil, first primary coil and the 4th primary coil form a transformation circuit, described second subprime coil, second primary coil and the 5th primary coil form a transformation circuit, described third time level coil, 3rd primary coil and the 6th primary coil form a transformation circuit.
Above-mentioned a kind of in the control circuit of electric machine step-down starting, the C of described first secondary coil and three phase mains is electrically connected, and the B of described second subprime coil and three phase mains is electrically connected, described third time level coil and the A of three phase mains be electrically connected.
Above-mentioned a kind of in the control circuit of electric machine step-down starting, the C of described first primary coil and three phase mains is electrically connected, and the B of described second primary coil and three phase mains is electrically connected, and the A of described 3rd primary coil and three phase mains is electrically connected.
Above-mentioned a kind of in the control circuit of electric machine step-down starting, the C of described 4th primary coil and three phase mains is electrically connected, and the B of described 5th primary coil and three phase mains is electrically connected, and the A of described 6th primary coil and three phase mains is electrically connected.
Advantageous Effects of the present utility model is: utilize electromagnetic induction principle, traditional transformer is switched tap pressure regulation to combine with compensation pressure regulation, by changing the turn ratio of the primary and secondary coil of transformer, regulate bucking voltage, thus regulation output voltage, reach the object of reduced-voltage starting, and eliminate the problem of motor at voltage switching instantaneous loss of pressure.
Be described further below with reference to the technique effect of accompanying drawing to design of the present utility model, concrete structure and generation, to understand the purpose of this utility model, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of control circuit for electric machine step-down starting provided by the utility model.
Shown in figure: 11-first secondary coil, 12-second subprime coil, 13-third time level coil, 21-first primary coil, 22-second primary coil, 23-the 3rd primary coil, 31-the 4th primary coil, 32-the 5th primary coil, 33-the 6th primary coil.
Embodiment
For more intuitively, intactly understanding the technical solution of the utility model, existing just to carry out nonrestrictive feature description in conjunction with the utility model embodiment and accompanying drawing thereof as follows:
As shown in Figure 1, this control circuit comprises electric motor starting contactor KM1, transformer, relay K A1, relay K A2, relay K A3, relay K A4, relay K A5, relay K A6 and motor M, wherein motor M is three phase alternating current motor, electric motor starting contactor KM1 is electrically connected with three phase mains and transformer respectively, and transformer comprises secondary coil N1, primary coil N2 and primary coil N3.
As shown in Figure 1, one end of relay K A1 is electrically connected with three phase mains, and the other end of relay K A1 is electrically connected with the upper end of primary coil N2; One end of relay K A2 is electrically connected with three phase mains, and the other end of relay K A2 is electrically connected with the lower end of primary coil N2 and one end of relay K A4 respectively; One end of relay K A3 is electrically connected with three phase mains, and the other end of relay K A3 is electrically connected with one end of relay K A4; The other end of relay K A4 is electrically connected with the upper end of primary coil N3; In parallel and the one end of relay K A5 of relay K A5 and relay K A6 is electrically connected with three phase mains, and the other end of relay K A5 is electrically connected with the lower end of primary coil N3; The upper end of secondary coil N1 is electrically connected with electric motor starting contactor KM1, and the lower end of secondary coil N1 is electrically connected with motor M.
Further, secondary coil N1 comprises the first secondary coil 11, second subprime coil 12 and for the third time level coil 13, primary coil N2 comprises the first primary coil 21, second primary coil 22 and the 3rd primary coil 23, primary coil N3 comprises the 4th primary coil 31, 5th primary coil 32 and the 6th primary coil 33, first secondary coil 11, first primary coil 21 and the 4th primary coil 31 form a transformation circuit, second subprime coil 12, second primary coil 22 and the 5th primary coil 32 form a transformation circuit, level coil 13 for the third time, 3rd primary coil 23 and the 6th primary coil 33 form a transformation circuit.
Further, the first secondary coil 11 is electrically connected with the C of three phase mains, and second subprime coil 12 is electrically connected with the B of three phase mains, and level coil 13 is electrically connected with the A of three phase mains for the third time.
Further, the first primary coil 21 is electrically connected with the C of three phase mains, and the second primary coil 22 is electrically connected with the B of three phase mains, and the 3rd primary coil 23 is electrically connected with the A of three phase mains.
Further, the 4th primary coil 31 is electrically connected with the C of three phase mains, and the 5th primary coil 32 is electrically connected with the B of three phase mains, and the 6th primary coil 33 is electrically connected with the A of three phase mains.
This control circuit utilizes electromagnetic induction principle, traditional transformer is switched tap pressure regulation and combines with compensation pressure regulation, by changing the turn ratio of the primary and secondary coil of transformer, regulates bucking voltage, thus regulation output voltage, reach the object of reduced-voltage starting; This control circuit, in the advantage taking into account existing reduced-voltage starting method, eliminates the problem of motor at voltage switching instantaneous loss of pressure, meanwhile, adopts the mode of boosting step by step to start, reduces torque shock ends during startup, be conducive to motor reliability service.The present invention is not subject to the impact of frequent starting and loading condition, and in identical load situation, the present invention's circuit used requisite space is less, runs more reliable.
The course of work of this control circuit is as follows: when relay K A1, relay K A2 are closed, when other relays disconnect, system exports minimum voltage, if now relay K M1 closes, then motor M starts with minimum voltage; After a period of time, relay K A1, relay K A4, relay K A5 are closed, and other relays disconnect, then system output voltage raises one grade, and motor M torque increases, also can just closing relay KM1 at this moment, then motor starts with higher torque; After continuing a period of time, relay KA1, relay K A4, relay K A6 close, and other relays disconnect, and now motor runs with 380V normal pressure, and start-up course terminates.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without the need to creative work.Therefore, all technical staff in the art according to design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should by the determined protection range of claims.
Claims (5)
1. the control circuit for electric machine step-down starting, it is characterized in that, described control circuit comprises electric motor starting contactor KM1, transformer, relay K A1, relay K A2, relay K A3, relay K A4, relay K A5, relay K A6 and motor M, described electric motor starting contactor KM1 is electrically connected with three phase mains and transformer respectively, and described transformer comprises secondary coil N1, primary coil N2 and primary coil N3; One end of described relay K A1 is electrically connected with described three phase mains, and the other end of described relay K A1 is electrically connected with the upper end of described primary coil N2; One end of described relay K A2 is electrically connected with described three phase mains, and the other end of described relay K A2 is electrically connected with the lower end of described primary coil N2 and one end of described relay K A4 respectively; One end of described relay K A3 is electrically connected with described three phase mains, and the other end of described relay K A3 is electrically connected with one end of described relay K A4; The other end of described relay K A4 is electrically connected with the upper end of described primary coil N3; In parallel and the one end of described relay K A5 of described relay K A5 and described relay K A6 is electrically connected with described three phase mains, and the other end of described relay K A5 is electrically connected with the lower end of described primary coil N3; The upper end of described secondary coil N1 is electrically connected with described electric motor starting contactor KM1, and the lower end of described secondary coil N1 is electrically connected with described motor M.
2. a kind of control circuit for electric machine step-down starting according to claim 1, it is characterized in that, described secondary coil N1 comprises the first secondary coil, second subprime coil and for the third time level coil, described primary coil N2 comprises the first primary coil, second primary coil and the 3rd primary coil, described primary coil N3 comprises the 4th primary coil, 5th primary coil and the 6th primary coil, described first secondary coil, first primary coil and the 4th primary coil form a transformation circuit, described second subprime coil, second primary coil and the 5th primary coil form a transformation circuit, described third time level coil, 3rd primary coil and the 6th primary coil form a transformation circuit.
3. a kind of control circuit for electric machine step-down starting according to claim 2, it is characterized in that, the C of described first secondary coil and three phase mains is electrically connected, and the B of described second subprime coil and three phase mains is electrically connected, described third time level coil and the A of three phase mains be electrically connected.
4. a kind of control circuit for electric machine step-down starting according to Claims 2 or 3, it is characterized in that, the C of described first primary coil and three phase mains is electrically connected, the B of described second primary coil and three phase mains is electrically connected, and the A of described 3rd primary coil and three phase mains is electrically connected.
5. a kind of control circuit for electric machine step-down starting according to Claims 2 or 3, it is characterized in that, the C of described 4th primary coil and three phase mains is electrically connected, the B of described 5th primary coil and three phase mains is electrically connected, and the A of described 6th primary coil and three phase mains is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520513146.6U CN204810181U (en) | 2015-07-03 | 2015-07-03 | A control circuit for motor reduced -voltage starting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520513146.6U CN204810181U (en) | 2015-07-03 | 2015-07-03 | A control circuit for motor reduced -voltage starting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204810181U true CN204810181U (en) | 2015-11-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520513146.6U Withdrawn - After Issue CN204810181U (en) | 2015-07-03 | 2015-07-03 | A control circuit for motor reduced -voltage starting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204810181U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967362A (en) * | 2015-07-03 | 2015-10-07 | 宁波绿凯节能科技有限公司 | Control circuit used for motor voltage reduction starting |
-
2015
- 2015-07-03 CN CN201520513146.6U patent/CN204810181U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967362A (en) * | 2015-07-03 | 2015-10-07 | 宁波绿凯节能科技有限公司 | Control circuit used for motor voltage reduction starting |
| CN104967362B (en) * | 2015-07-03 | 2018-08-21 | 宁波绿凯节能科技有限公司 | A kind of control circuit for electric machine step-down starting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151125 Effective date of abandoning: 20180821 |
|
| AV01 | Patent right actively abandoned |