| 摘要 |
<p>PURPOSE:To suppress the power loss of a field coil to a low value by supplementing the insufficient magnetic flux by the field of an electromagnet at a high load time by using a permanent magnet field only at a low load time. CONSTITUTION:A field control transistor 13 has zero current flow rate in the normally running state of a vehicle, no current flows through a field coil 10, and only the magnetic flux of a permanent magnet field 8 is only acted to an armature 2. When the load of the motor increases, the current flow rate of a main transistor 12 increases correspondingly, and the output of the motor is increased by raising the applied voltage of the armature 2. When the load of the motor further increases, the transistor 13 will operate, and a current is flowed to the coil 10. Therefore, the output of the motor further increases.</p> |
