A Starter–Generator Based on a Synchronous Machine with Permanent Magnets

Abstract

An approach to the creation of a starter–generator using a synchronous machine with permanent magnets without a rotor-position sensor is considered. A synchronous machine with permanent magnets can operate in starter and generator modes. In the starter mode, field-oriented control is carried out to convert electrical energy from the battery into mechanical energy of the machine; in the generator mode, the battery is turned off, while the generator is running. The stabilizer provides an output voltage of 24 V with an input voltage from 24 to 150 V. Switching from the consumption mode to the generation mode is carried out without power off, which is a feature of the proposed starter–generator control system. The proposed stabilizer is capable of maintaining a stable output current of up to 40 A. A detailed description and the principle of operation of the stabilizer are given. A control system for a synchronous machine with permanent magnets has been developed, taking into account both operating modes.