Patent Number: 7,786,631

Title: Linear motor

Abstract: A position-data converter and a motor-drive control device are connected. The position-data converter receives two-phase, sine-wave analog signals da and db from two first magnetic detectors, respectively, and converts these signals da and db to position data. On receiving a positioning instruction, the motor-drive control device calculates the value of current, from the current position signal generated by the position-data converter. The permanent magnets incorporated in a linear motor are used as components of a linear scale, as well.

Inventors: Sasaki; Toshihiko (Kanagawa, JP), Watanabe; Kazuo (Kanagawa, JP), Ishikawa; Katsumi (Kanagawa, JP)

Assignee: Wako Giken Co., Ltd

International Classification: H02K 11/00 (20060101); H02K 23/66 (20060101)

Expiration Date: 8/31/12018