To provide a permanent magnet generator of a self voltagecontrol type in which coils are arranged outside the generator and which generates a constant voltage at all times by generating a brake voltage by using the coils. この自己電圧制御型永久磁石式発電機は,コイルを発電機の外側に配置し,コイルでブレーキ電圧を発生させて常に一定の電圧を発電させる。 - 特許庁