Permanent magnet starting power generation system with open-circuit fault-tolerant capability and control method thereof

Abstract

The invention discloses a permanent magnet starting power generation system with an open-circuit fault-tolerant capability and a control method thereof. A permanent magnet starter generator is a high-impedance permanent magnet synchronous motor, and a bidirectional bridge converter has a redundant bridge arm to continuously detect the motor winding current when the generator starts and a system outputs stable direct current voltage, so as to realize vector control and fault detection. When an open circuit fault of a switching tube is detected, a driving signal of the bridge arm where a faultyswitch tube is located is blocked, a corresponding bidirectional thyristor is turned on, and the redundant bridge arm replaces the faulty bridge arm to work; when a motor winding open fault is detected, a driving signal of bridge arm connected to the winding is blocked, the corresponding bidirectional thyristor is turned on, a neutral point of the motor winding is connected to a midpoint of the redundant bridge arm, and the stable output of a torque or direct-current side voltage of the motor can be realized through a certain current compensation algorithm. According to the permanent magnet starting power generation system with the open-circuit fault-tolerant capability and the control method thereof provided by the invention, the starting torque is stable, and the power generation controlis simple; and the permanent magnet starting power generation system can operate stably under the open circuit state of the switching tube or the open circuit state of the motor winding, the fault-tolerant capability is high, and the reliability is high.

Description

technical field [0001] The invention relates to a starting power generation system, in particular to a permanent magnet starting power generation system with open-circuit fault tolerance capability and a control method thereof, belonging to the technical field of starting power generation. Background technique [0002] Multi-electric / all-electric aircraft can reduce aircraft weight and fuel consumption, and a key technology for realizing multi-electric / all-electric aircraft is the use of electric starting technology for engines, that is, integrated starting / power generation technology. According to the principle of reversible operation of the motor, the generator is used as a starter / generator. During the starting stage of the engine, the motor is in the state of electric operation, which converts electrical energy into mechanical energy and drives the engine to start. After the start, the engine in turn drives the motor to rotate and converts mechanical energy into electric...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problems of the open circuit of the switching tube and the open circuit of the motor winding in the permanent magnet starter power generation system existing in the prior art, and provide a permanent magnet starter with a simple structure, high reliability and flexible control with open circuit fault tolerance. Magnetic starter generator system and its control method

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