A Wide Speed ​​Adjustable Magnetic Field Modulation Doubly-fed Machine

Abstract

The invention discloses a double-fed electrical machine with wide speed regulation type magnetic field modulation, wherein the stator part includes a stator, a stator yoke, stator teeth, power windings and control windings; the rotor part includes an outer rotor and an inner rotor, and an outer rotor and an inner rotor Coaxial and independent of each other; the outer rotor is composed of the induction motor part and the magnetic field modulation part, including aluminum guide bars, and the iron core poles of the induction motor; the inner rotor is composed of surface-mounted permanent magnets and rotor cores; the motor shaft is located on the double The shaft center of the feeder is the rotor core outside the motor shaft, the surface-mounted permanent magnet is surface-mounted on the outer circumference of the rotor core, the outer rotor is located outside the inner rotor, the stator is located outside the outer rotor, and the power winding and control winding are located on the wire of the stator. in the slot. Through the invention, the combination of the magnetic field modulation motor and the induction motor is realized, and the mutual action of electricity and magnetism is realized. This kind of motor can realize wide speed regulation of the motor by adjusting the frequency fed into the control winding.

Description

technical field [0001] The invention relates to the fields of magnetic field modulation and doubly-fed motors, in particular to a wide speed-adjustable magnetic field modulation doubly-fed motor. Background technique [0002] Traditional synchronous motors and wound asynchronous motors require brushes and slip rings to be connected to external circuits. Due to the existence of sliding friction, they cannot operate reliably during operation. Therefore, the new brushless motor has attracted the attention of relevant scholars at home and abroad. The traditional magnetic gear motor cancels the brush, but it is difficult to adjust the speed and cannot achieve wide speed regulation. The brushless double-fed motor cancels the brush and slip ring, the system is reliable, the inverter used is small in capacity, the system cost is reduced, the operation is flexible, and the single-fed asynchronous, synchronous, super synchronous and sub synchronous can be easily realized. The stable...

AI Technical Summary

Problems solved by technology

However, there is a large electromagnetic isolation in the doubly-fed motor, resulting in a low power density of the motor

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