Two-stage hybrid excitation brushless synchronous motor

Abstract

The invention discloses a two-stage hybrid excitation brushless synchronous motor, which is characterized by comprising a hybrid excitation main generator, an exciter and a rotating rectifier, wherein the main generator is a rotating magnetic pole type hybrid excitation generator of which a rotor is provided with an exciting winding and a permanent magnet source; the exciter is a rotating armature type synchronous generator; an input end and an output end of the rotating rectifier are connected with an exciter armature winding and a main generator exciting winding respectively; and the rotating rectifier is arranged on the rotor. When the motor operates, alternating current generated by an exciter armature is rectified through the rotating rectifier and then is supplied to the main generator exciting winding. The invention has the advantages that: a motor exciting problem is solved without the addition of the initial excitation equipment by utilizing a permanent magnet field of the hybrid excitation main generator, so that the generator achieves stable voltage gradually and is completely self-excited. A special permanent magnet auxiliary exciter or an auxiliary exciting power supply is eliminated, and a two-stage hybrid excitation synchronous motor with a brushless structure is formed; moreover, the synchronous motor has a simple structure and high power density, and is self-excited and convenient to control.

Description

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AI Technical Summary

Benefits of technology

Inventions described by these inventives have several technical benefits such as improved performance, compact design, efficient use of space, ease of manufacturing, and cost savings over existing designs. These improvements include reducing the number of components needed, improving overall machine's ability to start up quickly, generating more torque during startup, enabling longer periods between successive starts while still providing enough force on the rotor, resulting in better stability and lifespan of the generator. Additionally, there may exist various techniques or strategies to improve their functioning effectively based upon specific parameters like field strength and temperature. Overall, they aim to create a highly integrated and versatile type of engine called a double stage brushed generator.

Problems solved by technology

Technological Problem addressed in this patented technical problem relates to improving the performance and durability of conventional electrical excited synchronously driven machines (ESM). Current methods involve adding extra parts or modifying their design with other features like reducing leakages that can lead to failure under harsh environments. Additionally, these techniques have limitations due to factors like poor cooling capabilities during high speed flight applications.

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