In more detail, if two windings are connected in {HEAD ~ series}, a rotation speed of the motor must be maintained at predetermined speed, and at the same time {TAIL ~ predetermined torque} required by load must be applied to the load 
In more detail , if two windings are connected in { HEAD ~ series } , a rotation speed of the motor must be maintained at predetermined speed , and at the same time { TAIL ~ predetermined torque } required by load must be applied to the load
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH