Axial magnetic circuit series double-ended excitation motor

Abstract

The invention provides an axial magnetic circuit series-connection type double-end excitation motor, which comprises a left end cover, a left excitation winding, an internal magnetic isolation ring, an N-pole iron core, an S-pole iron core, an armature winding, a stator iron core, a large magnetic isolation ring, a housing, a rotating shaft, a right excitation winding, a right end cover and end cover protrusions. The stator iron core is in a silicon steel sheet laminated structure; a rotor core is formed by a rotor yoke and the iron core poles; and the N-pole iron core and the S-pole iron core are arranged oppositely to form the rotor core. The two-pole iron core poles are in staggered arrangement, and are isolated by an air gap obviously larger than a main air gap between a stator and a rotor. The protrusions are formed in the centers of the end covers for winding excitation windings respectively. The end covers are placed at the two ends of the rotor core respectively; and the end cover protrusions and the rotor core are isolated by auxiliary air gaps. The stator iron core is fixedly arranged to the housing through the large magnetic isolation ring. By changing the magnitude of current in the excitation windings, output voltage of the motor is controlled. The advantages are that the motor has neither a brush nor a slip ring, does not need an exciter, is simple in structure and realizes brushless excitation.

Description

technical field [0001] The invention relates to an axial magnetic circuit series double-end excitation motor, which belongs to the field of brushless excitation synchronous motors. Background technique [0002] The brush excitation type synchronous generator is one of the mainstream generators. However, since the excitation winding of the brush-excited synchronous motor is placed on the rotor, it is necessary to excite the motor through brushes and slip rings. The brushes rub against the rotating parts for a long time, so that the brushes need to be replaced regularly and there is a risk of ring fire. The brushless excitation motor solves the problems of easy heating, ring fire, high noise and short life caused by the brush. Compared with the brush excitation motor, it has higher reliability and is more convenient to maintain. Brushless excitation motors are widely used in aviation power supply applications with high reliability requirements, in harsh mining conditions, an...

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes an axial magnetic circuit series type double-ended excitation motor, and its purpose is to solve the problem of realizing brushless excitation for a motor with an electric excitation source

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