CN203387446U - Star-delta voltage-reduction starting control circuit - Google Patents
Star-delta voltage-reduction starting control circuit Download PDFInfo
- Publication number
- CN203387446U CN203387446U CN201320437472.4U CN201320437472U CN203387446U CN 203387446 U CN203387446 U CN 203387446U CN 201320437472 U CN201320437472 U CN 201320437472U CN 203387446 U CN203387446 U CN 203387446U
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- China
- Prior art keywords
- control circuit
- motor
- star
- electromagnetic system
- contactor
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- Expired - Fee Related
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Abstract
The utility model provides a star-delta voltage-reduction starting control circuit. The objective of the utility model is to solve the problems such as poor stability and reliability and high use cost of a traditional star delta voltage-reduction starting control circuit. The star-delta voltage-reduction starting control circuit of the utility model comprises a motor control circuit; the motor control circuit is connected with a three-phase power supply through a motor protection circuit breaker QF1; the motor control circuit is provided with a motor M, a first motor contactor KM1 used for controlling the motor M and making the same subjected to star-delta voltage-reduction, a second motor contactor KM2 and a third motor contactor KM3; the star-delta voltage-reduction starting control circuit further comprises a PLC control circuit used for controlling the motor control circuit; the PLC control circuit is provided with a three-gear knob RB; the three-gear knob RB is connected with a first electromagnetic system on the first motor contactor KM1, a second electromagnetic system on the second motor contactor KM2, and a third electromagnetic system on a third motor contactor KM3 through a control switch QF2, wherein the first electromagnetic system, the second electromagnetic system and the third electromagnetic system are connected in parallel with one another.
Description
Technical field
The utility model relates to a kind of star delta reduced-voltage starting control circuit, belongs to electric motor starting protection field.
Background technology
According to power cut off delay control principle drawing and on-delay schematic diagram, be all to have corresponding electric components wiring to control before, but between client's operating period, through the customer response problem; Components and parts response lag problem is arranged, have components and parts self opening and closing points to react asynchronous problem, have not reaction of components and parts problem action just to be arranged through striking shake; Due to the electric components manufacturing process difference of different brands, the manufactured materials difference, cause frequent replacing in use, makes its this cover circuit control system have unreliability, can't determine the practical reliability of brand; Existing hardware is subject to the restriction of himself, inefficiency, and electrical wiring mode complexity, the difficulty searched problem after sale is larger; Because the electric components for time relay this type is had relatively high expectations to its internal electric structure, will inevitably improve its Costco Wholesale, not only, due to the relay of this type but also frequent a large amount of applicable, from secular price, become originally to see it is also a kind of cost pressure for the customer.
The utility model content
The deficiency that the utility model exists for prior art, provide a kind of star delta reduced-voltage starting control circuit, solved traditional star delta reduced-voltage starting control circuit stability and poor reliability, problem that use cost is high.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of star delta reduced-voltage starting control circuit; comprise circuit for controlling motor; described circuit for controlling motor is connected with three phase mains by motor protective circuit breaker QF1; the first motor contactor KM1, the second motor contactor KM2 and the 3rd motor contactor KM3 that described circuit for controlling motor is provided with motor M, carries out the step-down of star triangle for controlling motor M, is characterized in that: also comprise a PLC control circuit for circuit for controlling motor is controlled.
Described PLC control circuit is provided with a third gear knob RB and PLC control system, described third gear knob RB is by the first electromagnetic system on a control switch QF2 and described the first motor contactor KM1 and the second electromagnetic system on the second motor contactor KM2, described the first electromagnetic system, the second electromagnetic system parallel connection, described PLC control system is connected with zero line by the 3rd electromagnetic system on the 3rd motor contactor KM3.
Further, be in series with the second arc-control device on the second motor contactor KM2 between described the 3rd electromagnetic system and described control switch QF2.
Further, described third gear knob RB is provided with a start button SB, and described start button SB is in parallel with the first arc-control device on described the first motor contactor KM1.
Further, described third gear knob is divided into automated location contact A, stop position contact O and manual position contact M, described automated location contact A is connected with PLC cabinet end by the second safeties FU2, and described manual position contact M is connected with described manual control terminals QT/FT.
Further, described manual control terminals QT/FT is provided with first a safeties FU1.
Further, also be provided with one on described PLC control circuit for the PLC control system being operated to the actuation means PC controlled, described actuation means PC is connected with DC power supply DC by the 3rd arc-control device on the 3rd motor contactor KM3.
Further, the voltage of described DC power supply DC is 24V.
The beneficial effects of the utility model are: the utility model adopts PLC to control, and the reaction time is short, does not have the nonsynchronous problem of reaction; Circuits System is less on external hardware impact, has avoided greatly the integrity problem existed because of system; Wiring is simple, and flexibility is strong, can effectively increase work efficiency, and reduces the unnecessary difficulty searched problem after sale.
The accompanying drawing explanation
The circuit diagram that Fig. 1 is the utility model circuit for controlling motor;
The circuit diagram that Fig. 2 is the utility model PLC control circuit.
Embodiment
Below in conjunction with accompanying drawing, principle of the present utility model and feature are described, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
The utility model proposes a kind of star delta reduced-voltage starting control circuit, comprise the PLC control circuit shown in the circuit for controlling motor shown in Fig. 1 and Fig. 2, wherein, the PLC control circuit replaces traditional time-delay relay, in order to the startup of controlling the star delta reduced-voltage starting control circuit with close, as shown in Figure 1, described circuit for controlling motor is connected with three phase mains by motor protective circuit breaker QF1, described circuit for controlling motor is provided with a motor M, for controlling the first motor contactor KM1 that motor M is carried out the step-down of star triangle, the second motor contactor KM2 and the 3rd motor contactor KM3.
Shown in Fig. 2, described PLC control circuit is provided with a third gear knob RB and PLC control system, described third gear knob RB is divided into automated location contact A, stop position contact O and manual position contact M, described automated location contact A is connected with the PLC cabinet by the second safeties FU2, and described manual position contact M is connected with described manual control terminals QT/FT; When third gear knob RB rotates to the automated location contact A, this control circuit is connected with the PLC cabinet, thereby controlled by the PLC control circuit, when third gear knob RB rotates to manual position contact M, control circuit is connected with the manual terminals QT/FT that controls, and this control circuit enters manual control model, when third gear knob RB rotates to stop position contact O, this control circuit and power supply disconnect, thereby quit work.
Described third gear knob RB is by the first electromagnetic system on a control switch QF2 and described the first motor contactor KM1 and the second electromagnetic system on the second motor contactor KM2, described the first electromagnetic system, the second electromagnetic system parallel connection, described PLC control system is connected with zero line by the 3rd electromagnetic system on the 3rd motor contactor KM3.
Described third gear knob RB is provided with a start button SB, and described start button SB is in parallel with the first arc-control device on described the first motor contactor KM1.
Be in series with the second arc-control device on the second motor contactor KM2 between described the 3rd electromagnetic system and described control switch QF2.
Described manual control terminals QT/FT is provided with first a safeties FU1, and the first safeties FU1 effect is circuit to be carried out to current-limiting protection during to manual operation.
Also be provided with one on described PLC control circuit and the PLC control system operated to the actuation means PC controlled, described actuation means PC can intuitive and convenient the PLC control circuit is controlled, described actuation means PC is connected with DC power supply DC by the 3rd arc-control device on the 3rd motor contactor KM3; Wherein, the voltage of described DC power supply DC is 24V.
Actuation means PC sends instruction, make the PLC control system control the switch of circuit for controlling motor, thereby make the PLC control system substitute traditional time-delay relay, played the effect of power cut off delay and on-delay, described PLC control system can be controlled a plurality of circuit for controlling motor simultaneously, thereby reaches the purpose of saving time-delay relay.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (8)
1. a star delta reduced-voltage starting control circuit; comprise circuit for controlling motor; described circuit for controlling motor is connected with three phase mains by motor protective circuit breaker QF1; the first motor contactor KM1, the second motor contactor KM2 and the 3rd motor contactor KM3 that described circuit for controlling motor is provided with motor M, carries out the step-down of star triangle for controlling motor M, is characterized in that: also comprise a PLC control circuit for circuit for controlling motor is controlled.
2. star delta reduced-voltage starting control circuit according to claim 1, it is characterized in that: described PLC control circuit is provided with a third gear knob RB and PLC control system, described third gear knob RB is by the first electromagnetic system on a control switch QF2 and described the first motor contactor KM1 and the second electromagnetic system on the second motor contactor KM2, described the first electromagnetic system, the second electromagnetic system parallel connection, described PLC control system is connected with zero line by the 3rd electromagnetic system on the 3rd motor contactor KM3.
3. star delta reduced-voltage starting control circuit according to claim 1, is characterized in that: be in series with the second arc-control device on the second motor contactor KM2 between described the 3rd electromagnetic system and described control switch QF2.
4. star delta reduced-voltage starting control circuit according to claim 2, it is characterized in that: described third gear knob RB is provided with a start button SB, and described start button SB is in parallel with the first arc-control device on described the first motor contactor KM1.
5. star delta reduced-voltage starting control circuit according to claim 2, it is characterized in that: described third gear knob is divided into automated location contact A, stop position contact O and manual position contact M, described automated location contact A is connected with the PLC cabinet by the second safeties FU2, and described manual position contact M is connected with the manual terminals QT/FT that controls.
6. star delta reduced-voltage starting control circuit according to claim 5, it is characterized in that: described manual control terminals QT/FT is provided with first a safeties FU1.
7. star delta reduced-voltage starting control circuit according to claim 1, it is characterized in that: also be provided with one on described PLC control circuit for the PLC control system being operated to the actuation means PC controlled, described actuation means PC is connected with DC power supply DC by the 3rd arc-control device on the 3rd motor contactor KM3.
8. star delta reduced-voltage starting control circuit according to claim 7, it is characterized in that: the voltage of described DC power supply DC is 24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437472.4U CN203387446U (en) | 2013-07-22 | 2013-07-22 | Star-delta voltage-reduction starting control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437472.4U CN203387446U (en) | 2013-07-22 | 2013-07-22 | Star-delta voltage-reduction starting control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203387446U true CN203387446U (en) | 2014-01-08 |
Family
ID=49875894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320437472.4U Expired - Fee Related CN203387446U (en) | 2013-07-22 | 2013-07-22 | Star-delta voltage-reduction starting control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203387446U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050855A (en) * | 2014-07-02 | 2014-09-17 | 黄克亚 | Star-delta starting control experiment board based on PLC |
| CN105406773A (en) * | 2015-12-26 | 2016-03-16 | 四川科技职业学院 | Pole-change debugging control board based on PLC three-phase asynchronous motor |
-
2013
- 2013-07-22 CN CN201320437472.4U patent/CN203387446U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050855A (en) * | 2014-07-02 | 2014-09-17 | 黄克亚 | Star-delta starting control experiment board based on PLC |
| CN105406773A (en) * | 2015-12-26 | 2016-03-16 | 四川科技职业学院 | Pole-change debugging control board based on PLC three-phase asynchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20170722 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |