Permanent magnet starter-generator position detection system based on auxiliary winding, and a method

Abstract

The invention provides a permanent magnet starter-generator position detection system, and a method. The permanent magnet starter-generator position detection system comprises a current detection circuit, an auxiliary winding, a frequency locking circuit, a phase locking circuit and a control circuit. By adding an auxiliary position sensor and constructing a simulation circuit, the deviation between a phase lock signal of the auxiliary winding and a motor position reference signal under different working modes, rotational speeds and current amplitudes of a starter-generator multiplexed power converter is calibrated. During normal operation, the auxiliary position sensor is removed, and the control circuit compensates the phase locking signal by calibrating the obtained position deviation according to the working mode, the rotational speed and the magnitude of the current of the starter-generator multiplexed power converter, so as to obtain the position information of the permanent magnet starter-generator.

Description

technical field [0001] The invention relates to a position detection system and method of various permanent magnet starter generators, and is especially suitable for aerospace vehicles that have strict requirements on the volume and weight of the position sensor, the working environment of the motor is harsh, and the permanent magnet motor adopts a surface-mounted rotor structure. , The application field where the DC bus voltage is 270 V. Background technique [0002] The starter generator can work in two states of motoring and power generation in time-sharing, and has a dual-purpose function. When the starter generator is working in the electric state, the power converter is used as the source power, and the energy flows from the power converter to the starter generator first, and then the starter generator converts electrical energy into mechanical energy to drive the engine; Torque control makes the engine rise from zero speed to normal self-stable working speed. When t...

AI Technical Summary

Problems solved by technology

Indirect measurement reduces the reliability of position detection; the sinusoidal linear control mode limits the use of non-linear control strategies such as phase-controlled rectification and partial switch rectification for the multiplexed power converter of starter generation; the large amount of calculation increases the hardware requirements of the controller , which reduces the adaptability to the high-speed starter generator system

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