Japan Servo Co.,ltd.

Tomoyoshi Maruyama

Yuji Enomoto

Shoji Ohiwa

Sachio Hatori

Yuji Takagai

Kazuto Nagai

The invention relates to a motor with a frequency generator attached thereto, equipped with the frequency generator (FG) for detecting a rotational speed of the motor. The motor with the frequency generator attached thereto comprises a magnet having 10 poles of main magnetic poles for driving the motor, and frequency generator magnetic poles, provided on an end face of the magnet, in the direction of a motor axle, a stator yoke disposed opposite to the inner circumference of the magnet with a gap interposed therebetween, and a printed wiring board disposed so as to oppose the end face of the magnet with a gap interposed therebetween, wherein a first coil pattern and a second coil pattern, in rectangular waveform, having a plurality of power generation wire-elements radially formed, respectively, are disposed a surface of the printed wiring board, opposite to the end face of the magnet, a rotational speed adopted is in a range of 300 to 500 r/min, an inside diameter of the magnet is in a size range of 40 to 65 mm, the number of magnetic poles of the frequency generator magnetic poles is in a range of 54 to 157, corresponding to integer multiples of the number of the magnetic poles of the main magnetic poles, and the number of the power generation wire-elements of the first coil pattern and the second coil pattern, respectively, is equal to the number of the magnetic poles of the frequency generator magnetic poles, and the main magnetic poles are aligned with the frequency generator magnetic poles, respectively.

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Kiryu, Japan

Tomoyoshi Maruyama