Hybrid excitation permanent magnet motor for wireless transmission and tooth harmonic excitation

Abstract

The invention discloses a hybrid excitation permanent magnet motor for wireless transmission and tooth harmonic excitation in the technical field of motors. A stator and a rotor are arranged in a shell; a rotating shaft passes through a central hole of a rotor core and is fixed with the rotor core; the rotating shaft is connected with the shell through a bearing; a stator winding corresponds to apermanent magnet and a rotor exciting winding to generate electromagnetic induction; a rotor tooth harmonic winding and the rotor exciting winding are connected with a chopper circuit through a dioderectifying circuit; a driving signal of a switching element in the chopper circuit is acquired through a wireless receiving module; an excitation control system outputs a pulse signal to a wireless transmitting module, transmits the pulse signal to the wireless receiving module on the rotor through the wireless transmitting module, controls the on / off of the switching element in the chopper circuit and provides the needed exciting current for the rotor exciting winding; therefore, an air-gap field and the output voltage of the stator winding are adjusted. Compared with the prior art, the hybrid excitation permanent magnet motor has no electric brush, collecting ring, additional air gap or axial magnetic circuit, is simple in structure, low in flux leakage, low in electric excitation loss and high in motor efficiency, and has high capacity of adjusting a main field.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a hybrid excitation permanent magnet motor with wireless transmission and tooth harmonic excitation. Background technique [0002] Compared with the electric excitation motor, the permanent magnet motor has many advantages: no excitation winding and DC excitation power supply are required, brushes and slip rings are eliminated, and the brushless motor is realized. Therefore, the permanent magnet motor has a simple structure and reliable operation ; Since there is no excitation loss in the permanent magnet motor, the efficiency of the motor is improved; in addition, the permanent magnet motor also has the advantages of small size, light weight, and flexible structure. Therefore, permanent magnet motors are widely used in fields such as industry, civil, military and aerospace. However, the disadvantage of permanent magnet motors is that it is difficult to adjust the air gap magneti...

AI Technical Summary

Problems solved by technology

However, the disadvantage of permanent magnet motors is that it is difficult to adjust the air gap magnetic field, which limits the application of permanent magnet motors to a certain extent.

However, since the field winding is on the rotor, the connection between the field winding and the outside still requires slip rings and brushes, which increases the maintenance of the motor and reduces the operating reliability of the motor

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