Asynchronous starting control method and system of three-level brushless synchronous motor

Abstract

The invention discloses an asynchronous starting control method and system of a three-level brushless synchronous motor. According to the control method, a three-phase alternating current is introduced to a three-phase armature winding of a main power generator by a starting controller when a starting power generation system is started, a starting excitation current is not provided, the starting function is achieved only according to asynchronous torque generated by an impedance winding, and power is supplied to the starting controller by a starting power unit. The alternating current is introduced to the armature winding of the main power generator at a starting stage of the system, the asynchronous torque is generated by the impedance winding on the rotor of the main power generator, andthe starting function of the system is achieved by the asynchronous torque. By the starting control method, the starting function can be achieved only by a set of three-phase inverter, the starting control method is simplified, and the complexity of the whole system is reduced.

Description

technical field [0001] The invention relates to an aviation starting and generating system, in particular to a starting method of a three-stage brushless synchronous starting and generating system, belonging to the technical field of aviation motors. Background technique [0002] At present, most aircraft AC power systems use a three-stage brushless synchronous motor as a generator, and the engine is started by a DC starter, an air turbine starter or a gas turbine starter. However, such a starting system has a large volume and weight and low reliability. A simple and feasible way to realize the integration of starting and power generation is to directly omit the special starter on the basis of the existing power supply system, and run the three-stage brushless synchronous generator in the electric state according to the principle of reversibility of the motor. to start the engine. [0003] However, when the three-stage brushless synchronous motor is used as the starter of ...

AI Technical Summary

Problems solved by technology

This scheme sets two sets of power converters to improve the utilization rate of the excitation winding, but the two sets of power converters make the excitation control process more cumbersome and increase the complexity of the system structure

[0005] The existing three-stage brushless synchronous motor asynchronous start control methods all require start excitation control. At the same time, in order to obtain sufficient excitation current at zero speed and low speed, the start excitation control methods used are quite complicated and need to adjust the main Exciter structure, a large number of power devices are added, and the switching process of starting and generating is complicated

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