Permanent magnet biased bearingless switched reluctance motor

Abstract

The invention discloses a permanent magnet biased bearingless switched reluctance motor, which comprises stator back yokes, permanent magnets, stator suspension cores, stator torque cores, magnetic shields, suspension winding coils, torque winding coils, rotor cores and a shaft, wherein the stator suspension cores are wound with the suspension winding coils; the stator back yokes are arranged outside the stator suspension cores and connected with the stator suspension cores; the permanent magnets are arranged between the two stator back yokes; the magnetic shields and the stator torque cores are arranged in stator suspension core slots; the magnetic shields are positioned between the suspension stator windings and the stator torque cores; the rotor cores are arranged in the stator suspension cores and the stator torque cores; gas are reserved between the rotor cores and each of the stator suspension cores and the stator torque cores to form air gaps; and the shaft is arranged in the rotor cores. By the permanent magnet biased bearingless switched reluctance motor, decoupling control over torque and suspending power is realized to bring convenience to high-speed running; and a suspension biased magnetic flux is provided by the permanent magnets to reduce suspension power consumption and improve the efficiency of the motor.

Description

technical field [0001] The invention relates to a bearingless switched reluctance motor, in particular to a permanent magnet bias bearingless switched reluctance motor, which can be used as a driving motor for a high-speed blower and a compressor. Background technique [0002] With the continuous and rapid development of my country's economy, the problem of excessive energy consumption has become increasingly prominent. Facing the goals and commitments of energy conservation and emission reduction put forward by the country to the world, the energy conservation and environmental protection industry has been listed as the first of the seven emerging industries. At present, the power consumption of blowers and compressors accounts for more than 10% of the total power generation in the country, and the high-speed blowers and compressors based on high-speed motors do not need the step-up box, the volume can be reduced by 60-70%, and energy saving can be achieved by more than 20%....

AI Technical Summary

Problems solved by technology

The existing bearingless switched reluctance motor torque winding and suspension winding are installed on the same stator teeth, resulting in strong coupling between the main winding and suspension winding, resulting in complex magnetic field distribution inside the motor, and bearingless switched reluctance during operation The motor has a more complicated magnetic saturation phenomenon than the traditional switched reluctance motor. The magnetic saturation makes the relationship between the levitation force of the motor and the winding current seriously nonlinear, and the levitation force does not always increase with the increase of the winding current. In the case of reduced suspension force, this will inevitably bring difficulties to stable suspension control

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