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Decoupling method of wound-rotor bearingless asynchronous motor

A kind of asynchronous motor, bearingless technology, applied in the direction of control generator, motor generator control, electronic commutation motor control, etc., can solve the problems of motor electromagnetic torque interference, excitation magnetic field weakening, etc.

Active Publication Date: 2021-02-05
江苏大也环境有限公司
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Problems solved by technology

Therefore, the induced current of the levitation force winding magnetic field in the squirrel cage rotor will not only weaken the excitation magnetic field, but also interfere with the electromagnetic torque of the motor

Method used

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  • Decoupling method of wound-rotor bearingless asynchronous motor
  • Decoupling method of wound-rotor bearingless asynchronous motor
  • Decoupling method of wound-rotor bearingless asynchronous motor

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Embodiment Construction

[0069] 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.

[0070] A decoupling method for a wound-type bearingless asynchronous motor designed in the present invention is aimed at such as image 3 As shown in the wound type bearingless asynchronous motor, the wound type bearingless asynchronous motor consists of motor shaft 33, rotor core 32, torque winding 30, suspension force winding 31 and stator core 29 from inside to outside in the radial direction. . 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 ...

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Abstract

The invention discloses a decoupling method of a wound-rotor bearingless asynchronous motor. The decoupling method comprises a three-phase winding equivalent inductance parameter calculation method, avoltage equation and flux linkage equation construction method and a motor electromagnetic torque and suspension force independent control strategy based on magnetic field orientation. The method comprises the following steps: establishing an inductance matrix of the wound-rotor bearingless asynchronous motor and simplifying the inductance matrix by adopting an equivalence principle; deducing a voltage equation and a flux linkage equation of the motor; and finally, adopting a vector control strategy of torque magnetic field orientation and air gap magnetic field orientation to decompose the original system into two subsystems capable of independently controlling the rotating speed and the flux linkage of the motor. On the basis of establishing an accurate mathematic model of the wound-rotor bearingless asynchronous motor, the purpose of completely decoupling the rotating speed and the flux linkage is achieved by adopting the vector control principle of coordinate transformation and magnetic field orientation, and finally independent control over the electromagnetic torque and the suspension force of the wound-rotor bearingless asynchronous motor is achieved.

Description

technical field [0001] The invention belongs to the technical field of electric transmission control equipment, in particular to a decoupling method of a winding type bearingless asynchronous motor. Background technique [0002] With the development of modern industry, the application of motors is getting wider and wider, and its requirements are getting higher and higher. Bearingless motor utilizes the similarity between the magnetic bearing and the motor stator structure, skillfully embeds a set of suspension force windings on the ordinary motor, and controls the currents in the suspension force winding and torque winding respectively to achieve stable suspension and frictionless rotation at the same time. Compared with ordinary motors, bearingless motors have the advantages of no mechanical friction, wear, and no lubrication. They have broad application prospects in aerospace, high-speed hard drives, flywheel energy storage, biomedicine, and special electrical fields with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/26H02P21/28H02P21/05
CPCH02P21/26H02P21/28H02P21/05
Inventor 杨泽斌丁琪峰孙晓东卢承领贾培杰贾晶晶孙超
Owner 江苏大也环境有限公司
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