CN103944332A - Three-phase asynchronous motor - Google Patents
Three-phase asynchronous motor Download PDFInfo
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- CN103944332A CN103944332A CN201410109048.6A CN201410109048A CN103944332A CN 103944332 A CN103944332 A CN 103944332A CN 201410109048 A CN201410109048 A CN 201410109048A CN 103944332 A CN103944332 A CN 103944332A
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Abstract
The invention discloses a three-phase asynchronous motor. The three-phase asynchronous motor comprises an A-phase winding, a B-phase winding and a C-phase winding. The A-phase winding comprises a coil A1, a coil A2 and a coil A3. The B-phase winding comprises a coil B1, a coil B2 and a coil B3. The C-phase winding comprises a coil C1, a coil C2 and a coil C3. The end, capable of being connected with a power source, of each coil is the head end of the corresponding coil, and the end, opposite to the corresponding head end, of each coil is the tail end of the corresponding coil. The three-phase asynchronous motor is large in starting torque, capable of achieving heavy-load starting, and meanwhile simple in structure.
Description
Technical field
The present invention relates to a kind of motor, particularly relate to a kind of threephase asynchronous machine.
Background technology
Threephase asynchronous machine is the important component part in industrial motive use, the rotor speed of threephase asynchronous machine is lower than the rotating speed of rotating magnetic field, rotor winding because of and magnetic field between exist relative motion induced electromotive force and electric current, and with magnetic field interaction produce electromagnetic torque, realize energy conversion.Always with simple in structure, reliable, lightweight, low price and applied on a large scale.
It is star-triangle start mode or coil sections Starting mode that current middle-size and small-size threephase asynchronous machine adopted more; So these two kinds of Starting mode can only be applied to the start operating performance of zero load or relative underloading because detent torque is relatively little.
For the field that need to start with heavy duty at some, star-triangle start mode and coil sections Starting mode obviously can not meet the demands because its detent torque is relatively little.
At present for the field that needs heavy load starting, generally take the mode of variable frequency starting or with auxiliary actuating apparatus, this has increased equipment investment and maintenance cost undoubtedly.
Summary of the invention
The object of this invention is to provide a kind of threephase asynchronous machine, its detent torque is large, and starting current is less.
For solving the problems of the technologies described above, threephase asynchronous machine of the present invention, comprises A phase winding, B phase winding and C phase winding totally three phase windings, and described A phase winding comprises A1 coil, A2 coil and A3 coil; Described B phase winding comprises B1 coil, B2 coil and B3 coil; Described C phase winding comprises C1 coil, C2 coil and C3 coil; One end that each coil can directly be connected with power supply is its head end, and one end relative with head end is its tail end;
Described A1 coil is connected with the head end of A2 coil, and B1 coil is connected with the head end of B2 coil, and C1 coil is connected with the head end of C2 coil;
Described A1 coil, C1 coil and the tail end of B3 coil are connected; Described A2 coil, C3 coil and the tail end of B1 coil are connected, and described A3 coil, C2 coil and the tail end of B2 coil are connected.
Further, also comprise the diverter switch that can make the head end of the each coil in each phase winding simultaneously connect.In the time of electric motor starting, the head end of A1 coil, B1 coil and C1 coil access three phase mains, now the starting current of motor is 0.6 times while directly starting, detent torque is 0.5 times while directly starting; When starting current can be reduced, can keep enough large detent torque.
Adopt technique scheme, beneficial effect of the present invention is: threephase asynchronous machine of the present invention, and detent torque is large, can heavy load starting, simultaneously simple in structure.
Brief description of the drawings
Fig. 1 is the schematic diagram that ordinary three-phase synchronous star of the prior art-triangle starts;
Schematic diagram when Fig. 2 is ordinary three-phase synchronous operation of the prior art;
Schematic diagram when Fig. 3 is ordinary three-phase synchronous coil sections startup of the prior art;
Fig. 4 is the schematic diagram in the time of operation after ordinary three-phase synchronous coil sections of the prior art starts;
Schematic diagram when Fig. 5 is threephase asynchronous machine startup of the present invention;
Fig. 6 is the schematic diagram of threephase asynchronous machine of the present invention while normally moving.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figures 1 and 2, ordinary three-phase synchronous in the prior art startup stage and schematic diagram while normally moving, when adopt shown in Fig. 1 star-triangle start mode time, the size of current flowing through in A phase winding, B phase winding and C phase winding only has 0.3 times of the normal operating conditions shown in Fig. 2, at this moment, ordinary three-phase synchronous can not heavy load starting, can only drive lighter load, has limited its service condition.
As shown in Figures 3 and 4, when ordinary three-phase synchronous of the prior art adopts coil sections mode to start, every phase winding only has coil sections energising, and the size of current of now passing through in every phase winding also only has 0.3 times under normal operating conditions, can not heavy load starting.
Above prior art all can not realize heavy load starting, need to increase extra frequency conversion equipment, has increased cost.
In the disclosed threephase asynchronous machine of the present embodiment, every phase winding is provided with three coils.As shown in Figures 5 and 6, it comprises A phase winding, B phase winding and C phase winding totally three phase windings, and described A phase winding comprises A1 coil, A2 coil and A3 coil; Described B phase winding comprises B1 coil, B2 coil and B3 coil; Described C phase winding comprises C1 coil, C2 coil and C3 coil; One end that each coil can directly be connected with power supply is its head end, and one end relative with head end is its tail end;
Described A1 coil is connected with the head end of A2 coil, and B1 coil is connected with the head end of B2 coil, and C1 coil is connected with the head end of C2 coil;
Described A1 coil, C1 coil and the tail end of B3 coil are connected; Described A2 coil, C3 coil and the tail end of B1 coil are connected, and described A3 coil, C2 coil and the tail end of B2 coil are connected;
The head end of A1 coil and A2 coil is connected with terminal 1, and the head end of A3 coil is connected with terminal 7;
The head end of B1 coil and B2 coil is connected with terminal 3, and the head end of B3 coil is connected with terminal 9;
The head end of C1 coil and C2 coil is connected with terminal 2, and the head end of C3 coil is connected with terminal 8.
It also comprises the diverter switch that can make the head end of the each coil in each phase winding simultaneously connect.
This threephase asynchronous machine in the time of wiring, by three phase mains and terminal 1,2,3, be connected, if starter motor now, when the electric current in every phase winding only has direct startup 0.6 times, detent torque is 0.5 times while directly starting.After startup, diverter switch action, makes terminal 7 be connected with terminal 1, and terminal 2 is connected with terminal 8, and terminal 3 is connected with terminal 9.Now motor will be in normal operating conditions.
The above embodiment has only expressed embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (2)
1. a threephase asynchronous machine, comprises A phase winding, B phase winding and C phase winding totally three phase windings, it is characterized in that: described A phase winding comprises A1 coil, A2 coil and A3 coil; Described B phase winding comprises B1 coil, B2 coil and B3 coil; Described C phase winding comprises C1 coil, C2 coil and C3 coil; One end that each coil can directly be connected with power supply is its head end, and one end relative with head end is its tail end;
Described A1 coil is connected with the head end of A2 coil, and B1 coil is connected with the head end of B2 coil, and C1 coil is connected with the head end of C2 coil;
Described A1 coil, C1 coil and the tail end of B3 coil are connected; Described A2 coil, C3 coil and the tail end of B1 coil are connected, and described A3 coil, C2 coil and the tail end of B2 coil are connected.
2. threephase asynchronous machine according to claim 1, is characterized in that: also comprise the diverter switch that can make the head end of the each coil in each phase winding simultaneously connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410109048.6A CN103944332A (en) | 2014-03-21 | 2014-03-21 | Three-phase asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410109048.6A CN103944332A (en) | 2014-03-21 | 2014-03-21 | Three-phase asynchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN103944332A true CN103944332A (en) | 2014-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410109048.6A Pending CN103944332A (en) | 2014-03-21 | 2014-03-21 | Three-phase asynchronous motor |
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| CN (1) | CN103944332A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736766A (en) * | 2018-05-29 | 2018-11-02 | 苏州新亚科技有限公司 | A kind of control system and its implementation suitable for electric motor starting and operation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4736147A (en) * | 1985-04-01 | 1988-04-05 | Huazhong Institute Of Technology | Method of starting motors by harmonics and electrical motors started by this method |
| CN1049941A (en) * | 1989-09-01 | 1991-03-13 | 华中理工大学 | The alternating current motor stator winding of biharmonic starting and speed governing |
| CN1283891A (en) * | 1999-08-10 | 2001-02-14 | 薛蕃钰 | Three-wave start method of AC motor and connection method of its windings |
| CN203734489U (en) * | 2014-03-21 | 2014-07-23 | 雷勃电气（苏州）有限公司 | Three-phase asynchronous motor |
-
2014
- 2014-03-21 CN CN201410109048.6A patent/CN103944332A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4736147A (en) * | 1985-04-01 | 1988-04-05 | Huazhong Institute Of Technology | Method of starting motors by harmonics and electrical motors started by this method |
| CN1049941A (en) * | 1989-09-01 | 1991-03-13 | 华中理工大学 | The alternating current motor stator winding of biharmonic starting and speed governing |
| CN1283891A (en) * | 1999-08-10 | 2001-02-14 | 薛蕃钰 | Three-wave start method of AC motor and connection method of its windings |
| CN203734489U (en) * | 2014-03-21 | 2014-07-23 | 雷勃电气（苏州）有限公司 | Three-phase asynchronous motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736766A (en) * | 2018-05-29 | 2018-11-02 | 苏州新亚科技有限公司 | A kind of control system and its implementation suitable for electric motor starting and operation |
| CN108736766B (en) * | 2018-05-29 | 2024-02-09 | 苏州新亚科技有限公司 | Control system suitable for starting and running of motor and implementation method thereof |
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Application publication date: 20140723 |