Distortion Factor of an Output-Voltage Wave Form on a Magnetic Encoder.
Y. Kikuchi, F. Nakamura, Hiroyuki Wakiwaka, Yoshinori Yamamoto, Hiroyuki Yamada · Journal of the Magnetics Society of Japan · 1996
A magnetic encoder has a simple structure and is strong in dirt. In the field of factory automation, many magnetic rotary encoders are therefore used in a servo motor to detect the angle and speed of rotation. This paper investigates the distortion wave of the output voltage in the magnetic encoder, and also discusses the distortion factor range of less than 10 percent. It is established that the output voltage takes the maximum value, that the cause of the distortion wave is the saturation of the magnetic char- acteristic of the MR element, and that the range of the distortion factor less than 10 percent spreads out in a belt under a magnetic field of 300 mA.