永久磁石同期発電機の短絡検知と回路遮断手法

抄録

In recent years, the electrification of aircraft has progressed, and the capacity of electricity is increasing. Electrical accidents can lead to fires in the cockpit and life-threatening accidents such as loss of control and crashes. In addition, as a result of an arc occurring due to a malfunction in the circuit or battery device, the flight may be canceled or an emergency landing may occur. For example, the mainstream of generators used in aircraft is the field winding type because the output is stopped by cutting the field winding in the event of a generator accident. On the other hand, with the increase in capacity, the development of a high-output permanent magnet type synchronous generator with a built-in engine is progressing, and there is an advantage that output can be obtained just by rotating. However, when the dielectric breakdown of the winding occurs, various circuit short circuits occur, and there is a problem that the overcurrent continues and the generator ignites. In order to solve the problem, this paper proposes a short-circuit detection method inside the generator. We also report the usefulness of the short-circuit test using a 20kW system.