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

Abstract

The invention discloses a permanent-magnet starting power generation system with fault-tolerant capability and a control method thereof, and belongs to the technical field of starting power generation. The system comprises dual three-phase high-impedance permanent-magnet starting power generators, two groups of bidirectional bridge-type power conversion circuits, a starting power generation changeover switch, a storage battery, a DC load, a starting power generation system controller, a position sensor, a temperature sensor, a current sensor and a voltage sensor. The control system employing aspace vector pulse width modulation (SVPWM) technology runs at a starting stage and a power generation stage; and when a turn-to-turn short-circuit fault occurs in the motor, a quadrature-axis current given signal of a fault winding is set to be zero, a direct-axis current given signal is set to be a weak magnetic current at the size of rated current, so that the fault winding enters a weak magnetic state, the short-circuit current of the fault winding is limited to a range near to the rated current, a large part of power output is borne by a normal winding, the system is stable in starting torque, simple in power generation control and high in reliability, and the short-circuit current, particularly the turn-to-turn short-circuit current can be effectively limited.

Description

technical field [0001] The invention relates to a starting power generation system, in particular to a permanent magnet starting power generation system with fault tolerance capability and a control method thereof, belonging to the technical field of starting power generation. Background technique [0002] The integration of starter and power generation can reduce the volume of the system and make the structure compact, and it is an independent power supply system that can be applied to aircraft. According to the principle of reversible operation of the motor, the generator is used for two purposes. When the aeroengine is not working, the motor is used as an electric motor to start the aeroengine. After the aeroengine starts, the aeroengine drives the motor to generate electricity in turn. starter, reducing the volume and weight of the system and improving efficiency. [0003] Permanent magnet synchronous motors have the advantages of high output torque, high power density,...

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Problems solved by technology

[0006] The purpose of the present invention is to address the shortcomings of the above-mentioned background technology, provide a permanent magnet starter power generation system with fault tolerance and its control method, realize the effective suppression of the inter-turn short-circuit current of the permanent magnet starter system, and solve the existing problems The technical problem that the fault-tolerant permanent magnet starter generator cannot effectively suppress the inter-turn short-circuit current

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