| 摘要 |
PROBLEM TO BE SOLVED: To make communication transformers small in size in a synthesizing/ separating circuit for a communication signal and circuit drive power. SOLUTION: A circuit drive power and a communication signal transferred from a servo controller 13 to a position detector 1 are synthesized by a communication transformer 14 and separated by a communication transformer 2 of the position detector 1 through a power communication signal common use cable 12. The communication transformers 14, 2 are respectively provided with a 1st synthesis current winding 141 and a 2nd synthesis current winding 142 through which a synthesis current of the communication signal current and the circuit drive current is flowed, a drive current winding 143 through which only the circuit drive current is flowed and a communication signal winding 144 through which only the communication signal current is flowed and the drive current winding 143 is wound so as to cancel the magnetic flux of the 1st and 2nd synthesis current windings 141, 142 due to the circuit drive current. |
