Abstract
To keep pace with advances in factory automation, systems for generating torque, such as for numerically controlled machinery and industrial robots, must be able to detect torques and produce corresponding detection signals for use in controlling the torque-generating system. Remarkable progress has recently been made using ac servo systems, which do not require maintenance. Controllability comparable to that of dc motors is needed even in induction motors. This report describes a built-in amorphous torque sensor for use in induction motors, employing rectangular amorphous ribbons with a field-induced magnetic anisotropy and contact-free magnetic heads.
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