Mixed field excitation brushless synchronous motor with coordination structure

Abstract

The invention discloses a hybrid excitation brushless synchronous machine with a coordinate structure belonging to the hybrid excitation synchronous machine. The machine comprises a permanent magnet synchronous motor and an electric excitation brushless synchronous motor. An armature winding (5) is sleeved on a permanent magnet synchronous stator core (4) and an electric excitation brushless synchronous stator core (9). The permanent magnet synchronous motor rotor is composed of an N pole shoe (1), an S pole shoe (2) and a permanent magnet steel (3). The electric excitation brushless synchronous motor rotor is composed of a magnetizer A(6), a magnetizer B(7) and a stainless steel block (8). An excitation winding (10) and a magnetic conductive bridge (11) are also included. The rotor magnetic circuit and stator magnetic circuit of the two motor are independent with each other but share the armature winding (5) and a shaft (15). The excitation current bidirectionally regulates the air gap flux in the electric excitation brushless synchronous motor to regulate the induced potential or output torque of the armature winding. The motor of the invention not only can be a brushless ac generator, but also a brushless dc generator by external connecting with a rectification circuit, furthermore as a motor for the aviation frequency power with a wide rotation speed range, the wind generator system and the electric automobile drive system.

Description

technical field [0001] The invention relates to a brushless synchronous motor. technical background [0002] Permanent magnet synchronous motor is easy to realize brushless structure, high power density and high efficiency, so it has received great attention. However, after the permanent magnet synchronous motor is manufactured, it is difficult to adjust the air gap magnetic field, making it difficult to adjust the output voltage and demagnetize it in the power generation state, it is difficult to weaken the magnetic field in the electric state, and the constant power operating range is narrow. important technical bottleneck. The air-gap magnetic field of the electric excitation synchronous motor is easy to adjust, but its excitation power is completely provided by the electric excitation magnetic potential, and the excitation loss is large, resulting in low efficiency of the motor. The hybrid excitation synchronous motor is a new type of motor formed by organically combin...

AI Technical Summary

Problems solved by technology

However, the electric excitation rotor part is a traditional electric excitation structure, and there are still brushes and slip rings, and the entire motor still has a brush structure, which limits its power increase, service life and reliability.

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