CN201466939U - AC exciting motor - Google Patents
AC exciting motor Download PDFInfo
- Publication number
- CN201466939U CN201466939U CN2009201076708U CN200920107670U CN201466939U CN 201466939 U CN201466939 U CN 201466939U CN 2009201076708 U CN2009201076708 U CN 2009201076708U CN 200920107670 U CN200920107670 U CN 200920107670U CN 201466939 U CN201466939 U CN 201466939U
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- CN
- China
- Prior art keywords
- motor
- exciter
- main motor
- winding
- stator winding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides an AC exciting electrode, which comprises two coupled wound rotor type asynchronous motors, wherein one motor serves as a main motor while the other motor serves as an exciter; a stator winding of the exciter 3 is connected with an excitation source 1 with the three-phase frequency F2, and a rotor winding thereof is coupled with a rotor winding of the main motor 4; and a stator winding of the main motor is coupled with a power grid 2 with the power frequency F1. The adjustment on the exciting current of the exciter can regulate the rotational speed n and the power factor COS Phi of the motor; and the adjustment on the relative positions of the stator windings of the exciter and the main motor can also change the rotational speed n and the power factor COS Phi of the motor. The motor adopts variable speed constant frequency and stepless speed regulation when operated for power generation and as an electric motor respectively.
Description
Technical field
The utility model relates to a kind of two AC excitation motor that wire-wound asynchronous motor is formed by shaft coupling.
Background technology
Present generator adopts the synchronous generator of DC excitation more, owing to be synchronous machine, so there is following shortcoming: 1, the electromotive force frequency of generator
When the rotation speed n of prime mover is hanged down, have only the number of pole-pairs P ability f that increases motor to make and reach power frequency, make the volume of motor become grand.2, the be incorporated into the power networks requirement of stability has proposed many technical barriers for the networking of large regional grid.3, constant rotational speed can't realize the optimum efficiency operation.
Present ac excitation generating system, its AC excitation electric current is supplied with by friendship～ac frequency converter, because of its quality of power supply poor, complex structure, this technology does not also obtain practicability.
Present frequency-conversion and speed-regulation motor can be realized optimum operating condition operation, but complex structure, to high-voltage motor also will be repeatedly voltage transformation, the scope of application is narrower.
The utility model content
Task of the present utility model provides a kind of simple in structure, and cost is low, reliable AC excitation motor.
Motor of the present utility model is made of two wire-wound asynchronous motors of shaft coupling.Number of pole-pairs is P
2Make AC exciter, stator can make and can rotate, to add frequency in having decided winding be f
2The three phase mains excitation, induce the triphasic potential of slip-frequency in its rotor winding.Number of pole-pairs is P
1The motor of deciding, stator winding and power frequency f during operation
1Electrical network connect, the rotor winding of rotor winding and AC exciter links.Rotating speed of motor
To a motor f
1, P
1, P
2Be definite value, n and f
2Linear, transfer f
2Can turn fast n, work as P
1=P
2The time, f
1=f
2, change the AC exciter exciting current and can change rotating speed of motor n and power rate cos φ.
Because this motor is to be made of two wire wound asynchronous motors, adjust the exciting current of exciter, i.e. the operating mode of may command motor, it is little to adjust power.Work as P
1=P
2The time, f
1=f
2, the field power supply of exciter does not need frequency conversion, and it is simple to adjust circuit structure; Also can realize the adjustment of motor operating condition by the relative position of adjusting AC excitation machine stator and main motor stator.Its advantage applies exists:
1, the number of pole-pairs of motor can design by minimum value, has dwindled motor size.
2, variable speed constant frequency generator has improved operational efficiency, has solved the stability problem of networking, has realized the brushless ac excitation.
3, the tolerance stepless speed regulation of motor.
4, motor is simple in structure.
Description of drawings
Fig. 1 is the winding diagram of AC excitation motor of the present invention;
Fig. 2 is an electric machine structure sketch shown in Figure 1;
Fig. 3 is the rotation speed relation figure of stator and rotor magnetic potential.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection range of the present utility model with this.
The described AC excitation motor of Fig. 1, the stator winding of exciter 3 connects field power supply 1, and the rotor winding links to each other with the rotor winding of main motor 4, and the stator winding of main motor connects common frequency power network 2.Fig. 2 is the structure diagram of motor, 11, the 22nd, exciter stator and rotor winding, 33, the 44th, main motor stator and rotor winding, 5 is the bearing of AC exciter stator winding and main motor stator winding relative position, changes the phase angle that its relative position can be adjusted main motor electromotive force E and line voltage U.Fig. 3 (a) is the rotation speed relation figure of main motor stator and rotor magnetic potential,
N is a rotating speed of motor; Fig. 3 (b) is the rotation speed relation figure of exciter stator and rotor magnetic potential,
N is a rotating speed of motor.
The specified commentaries on classics 53.6rpm of 1: one movable propeller turbine of the exemplary embodiments of this motor should polarity logarithm P
1=56 synchronous generator, the existing hydraulic turbine can change into decides the oar formula, polarity logarithm p
1=p
2=1 AC excitation motor can realize variable speed constant frequency generator.
The rated voltage U=10KV of 2: one pump motors of the exemplary embodiments of this motor, rated speed n=740rpm, economical operation rotating speed be at 650～750rpm, should step-down joins the realization speed governing of boosting behind friendship～ac frequency converter, now joins p
1=p
2=1 AC excitation motor can realize.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. by two AC excitation motor that wire-wound asynchronous motor is formed of shaft coupling, it is characterized in that, comprising:
Exciter (3) comprises stator winding (11) and rotor winding (22);
Main motor (4) comprises stator winding (33) and rotor winding (44);
Field power supply (1) joins with the stator winding (11) of described exciter (3);
Common frequency power network (2) joins with the stator winding (33) of described main motor (4);
The rotor winding (22) of described exciter (3) and the rotor winding (44) of described main motor (4) join;
Be provided with three-phase alternating-current supply in the stator winding (11) of described exciter (3).
2. AC excitation motor according to claim 1 is characterized in that, the number of pole-pairs p of described main motor (4)
1And the number of pole-pairs p of exciter (3)
2Equate, and f
2=f
1, f wherein
1Be the frequency of common frequency power network (2), f
2Frequency for three-phase alternating-current supply.
3. AC excitation motor according to claim 1 is characterized in that, the stator of the stator winding (33) of described exciter (3) is made rotation, in order to regulating the electromotive force E of main motor (4)
0Phase place with the voltage U of common frequency power network (2).
4. AC excitation motor according to claim 1 is characterized in that, the number of pole-pairs p of described main motor (4)
1And the number of pole-pairs p of exciter (3)
2Be 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201076708U CN201466939U (en) | 2009-05-06 | 2009-05-06 | AC exciting motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201076708U CN201466939U (en) | 2009-05-06 | 2009-05-06 | AC exciting motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466939U true CN201466939U (en) | 2010-05-12 |
Family
ID=42394286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201076708U Expired - Fee Related CN201466939U (en) | 2009-05-06 | 2009-05-06 | AC exciting motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201466939U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846739A (en) * | 2016-04-11 | 2016-08-10 | 哈尔滨理工大学 | Pumped storage power generator running at continuously variable speed and non-continuously variable speed |
-
2009
- 2009-05-06 CN CN2009201076708U patent/CN201466939U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846739A (en) * | 2016-04-11 | 2016-08-10 | 哈尔滨理工大学 | Pumped storage power generator running at continuously variable speed and non-continuously variable speed |
| CN105846739B (en) * | 2016-04-11 | 2018-11-13 | 哈尔滨理工大学 | A kind of pump storage machines with grade and stepless speed regulation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20140506 |