CN201690398U - Contactor connecting circuit in motor starlike-triangular start-up circuit - Google Patents
Contactor connecting circuit in motor starlike-triangular start-up circuit Download PDFInfo
- Publication number
- CN201690398U CN201690398U CN201020208455XU CN201020208455U CN201690398U CN 201690398 U CN201690398 U CN 201690398U CN 201020208455X U CN201020208455X U CN 201020208455XU CN 201020208455 U CN201020208455 U CN 201020208455U CN 201690398 U CN201690398 U CN 201690398U
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- Prior art keywords
- contactor
- circuit
- motor
- starlike
- triangular
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- Expired - Fee Related
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Abstract
The utility model discloses a contactor connecting circuit in a motor starlike-triangular start-up circuit, which comprises an alternating-current contactor (KM1), a motor coil (L1), a triangular contactor (KM2) and a starlike contactor (KM3), wherein the alternating current contactor (KM1) is connected with the motor coil (L1) in series, and a main contact of the triangular contactor (KM2) is connected in parallel on a circuit wherein the alternating current contactor (KM1) is connected with the motor coil (L1) in series. For the contactor connecting circuit in the motor starlike-triangular start-up circuit, the current flowing through the contactor is 1/1.732 time of that in the prior art, and the specification of the contactor is smaller than that of a traditional thermorelay, therefore, the volume of a power control box body is reduced, and the sectional area of a cable is reduced.
Description
Technical field:
The utility model relates to electric field, relates in particular to the connecting circuit of a kind of contactor in start-up circuit.
Background technology:
Contactor is to utilize coil to flow through electric current in industrial electro to produce magnetic field, makes contact closure, to reach the electrical equipment of control load.Contactor is made up of electromagnetic system (iron core, fixed core, solenoid) contact system (normally open contact and normally closed interlock) and arc-control device.Its principle is after the solenoid energising of contactor, can produce very strong magnetic field, and make fixed core produce electromagnetic attraction and attract armature, and drive the contact action: normally closed interlock disconnects; The normally open contact closure, both link.When coil blackout, electromagnetic attraction disappears, and armature discharges under the effect of retracting spring, contact is restored: the normally closed interlock closure; Normally open contact disconnects.
In industrial electric, the model of contactor is a lot, and electric current does not wait 5A～1000A's, and its use is quite extensive.On electrotechnics; contactor is a kind of automation switch that is used for being switched on or switched off load-carrying alternating current-direct current main circuit or big volume controlled circuit; major control is to liking motor; also be used for other electrical loads in addition; can not only connect and cut off circuit as electric heater, electric welding machine, lighting apparatus, contactor, but also have the effect of low-voltage release guard.Contactor control capacity is big, is applicable to frequent operation and far distance controlled, is one of critical elements in the automatic control system.
Be illustrated in figure 2 as the circuit diagram that thermal relay is protected at motor in the prior art: this circuit comprises A.C. contactor KM1, motor winding L1, triangular form contactor KM2 and star-like contactor KM3; in A.C. contactor KM1 main contact and the circuit that motor winding L1 connects, the main contact of triangular form contactor KM2 then in parallel on motor winding L1 two ends.
Because but fast shut-off exchanges with the direct current major loop and can connect device with big Current Control (some type can reach 800 amperes) circuit continually, so often apply to motor as controlling object, but motor star-like-the triangle staring torque is less, be not suitable for heavy-load start, and the contactor mode of connection is comparatively complicated, and it is higher to connect manufacturing cost.
The utility model content:
The purpose of this utility model is to be used for remedying the deficiencies in the prior art, and provide a kind of motor star-like-the triangle start-up circuit in the contactor connecting circuit.
To achieve these goals, the technical solution of the utility model is as follows:
Motor is star-like-the triangle start-up circuit in the contactor connecting circuit, this connecting circuit comprises A.C. contactor (KM1), motor winding (L1), triangular form contactor (KM2) and star-like contactor (KM3), described A.C. contactor (KM1) is connected in series with motor winding (L1), and the main contact of described triangular form contactor (KM2) is connected in parallel on A.C. contactor (KM1) and the circuit that motor winding (L1) is connected in series.
The utility model motor is star-like-contactor connecting circuit in the triangle start-up circuit, and the electric current that flows through contactor is in original technology
Doubly, and the contactor specification is littler than traditional thermal relay, thereby has dwindled headstock casing volume, and it is long-pending to have reduced the cross-section of cable.
Description of drawings:
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the utility model contactor circuit connection layout
Fig. 2 is a prior art contactor circuit connection layout
Embodiment:
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1: motor is star-like-the triangle start-up circuit in the contactor connecting circuit, this connecting circuit comprises A.C. contactor (KM1), motor winding (L1), triangular form contactor (KM2) and star-like contactor (KM3), A.C. contactor (KM1) is connected in series with three motor windings (L1), and the main contact of triangular form contactor (KM2) is connected in parallel on A.C. contactor (KM1) and the circuit that motor winding (L1) is connected in series.
Its principle of contactor connecting circuit is after the solenoid energising of A.C. contactor (KM1), can produce very strong magnetic field, and make fixed core produce electromagnetic attraction and attract armature, and drive the contact action: normally closed interlock disconnects; The normally open contact closure, both link.When coil blackout, electromagnetic attraction disappears, and armature discharges under the effect of retracting spring, contact is restored: the normally closed interlock closure; Normally open contact disconnects.
The utility model motor is star-like-contactor connecting circuit in the triangle start-up circuit, and the electric current that flows through contactor is in original technology
Doubly, and the contactor specification is littler than traditional thermal relay, thereby has dwindled headstock casing volume, and it is long-pending to have reduced the cross-section of cable.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
- Motor star-like-the triangle start-up circuit in the contactor connecting circuit, this connecting circuit comprises A.C. contactor (KM1), motor winding (L1), triangular form contactor (KM2) and star-like contactor (KM3), described A.C. contactor (KM1) is connected in series with motor winding (L1), it is characterized in that the main contact of described triangular form contactor (KM2) is connected in parallel on A.C. contactor (KM1) and the circuit that motor winding (L1) is connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020208455XU CN201690398U (en) | 2010-05-27 | 2010-05-27 | Contactor connecting circuit in motor starlike-triangular start-up circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020208455XU CN201690398U (en) | 2010-05-27 | 2010-05-27 | Contactor connecting circuit in motor starlike-triangular start-up circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690398U true CN201690398U (en) | 2010-12-29 |
Family
ID=43378675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020208455XU Expired - Fee Related CN201690398U (en) | 2010-05-27 | 2010-05-27 | Contactor connecting circuit in motor starlike-triangular start-up circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201690398U (en) |
-
2010
- 2010-05-27 CN CN201020208455XU patent/CN201690398U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20190527 |