A pole-changing speed-regulating winding type bearingless asynchronous motor
A pole-changing speed regulation, asynchronous motor technology, applied in asynchronous induction motors, electromechanical devices, electrical components, etc., can solve the problems of time delay, failure to fundamentally eliminate the induced current of the suspension force winding, and achieve low cost and maintenance. The effect of convenient, simple control equipment
Active Publication Date: 2021-08-03
JIANGSU UNIV
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Problems solved by technology
However, these methods compensate the loss of levitation force in the control system, which cannot fundamentally eliminate the induced current of the levitation force winding in the rotor, and there is a certain time delay itself
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] Such as figure 1 The pole-changing speed-regulating winding type bearingless asynchronous motor shown has a motor shaft 33, a rotor core 32, a torque winding 30, a suspension force winding 31 and a stator core 29 in the radial direction from the inside to the outside. The stator core 29 is made of laminated silicon steel sheets of the type DW465-50, and the stator core 29 is uniformly provided with 36 stator slots. Between the rotor core 32 and the stator core 2, a torque winding 30 and a suspension force winding 31 are arranged. Both the torque winding 30 and the suspension force winding 3...
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The invention discloses a pole-changing speed-regulating winding type bearingless asynchronous motor, which comprises a motor shaft, a rotor iron core, a torque winding, a suspension force winding and a stator iron core in sequence from the inside to the outside along the radial direction; the rotor iron core is evenly designed. There are 28 rotor slots, and a set of copper coils is set in each rotor slot; along the clockwise direction, the 4 rotor slots at 90° intervals are divided into one group, because the copper coils in each group of rotor slots are made of The special rotor coil circuit structure realizes that it can only induce the magnetic field of the torque winding, which can improve the suspension force and reduce the torque ripple of the motor. At the same time, when the torque winding and the number of pole pairs of the torque winding change, the structure of the rotor winding circuit is correspondingly changed through digital control, and the pole-changing speed regulation of the bearingless asynchronous motor is realized.
Description
technical field [0001] The invention belongs to the field of motor manufacturing, in particular to a pole-changing speed-regulating winding type bearingless asynchronous motor. Background technique [0002] Compared with traditional asynchronous motors, bearingless asynchronous motors have the advantages of no mechanical friction, wear, no lubrication, and long service life. with broadly application foreground. [0003] At present, most asynchronous motors use squirrel-cage rotors. Due to the short-circuit structure, the squirrel-cage rotors can induce air-gap magnetic fields with different numbers of pole pairs. When the number of pole pairs of the stator changes, the rotor still has an induced current. Due to the existence of two sets of windings in the bearingless asynchronous motor, the squirrel-cage rotor will cut the air-gap magnetic field of the suspension force winding while cutting the air-gap magnetic field of the torque winding. Loss occurs, and the flux linkage...
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IPC IPC(8): H02K17/42H02K1/26H02K11/30H02K1/16
CPCH02K1/165H02K1/265H02K17/42H02K2213/03H02K11/30
Inventor 杨泽斌丁琪峰孙晓东卢承领贾培杰孙超许婷
Owner JIANGSU UNIV