Kabushiki Kaisha Yaskawa Denki

Tsuyoshi Asanuma

Tomohiro Matsuo

Takefumi Kabashima

Kazunari Matsuzaki

A magnetic encoder apparatus comprises a permanent magnet fixed to a rotating body , a magnetic field detection element which is opposed to the permanent magnet through an air gap and attached to a fixed body , and a signal processing circuit to process a signal from the magnetic field detection element . The permanent magnet is formed into disk-like, and magnetized in one direction which is perpendicular to the shaft of the rotating body . The magnetic field detection element is arranged on the outer peripheral side of the permanent magnet through an air gap. Further, the fixed body is formed by a ring-like magnetic substance, and an air gap is provided in the circumferential direction, and the magnetic field detection element may be provided in the air gap portion. Accordingly, a magnetic encoder apparatus in which the structure is simple, the resolution is very high, the accuracy is high, and the size is small, can be obtained.

Growing community of inventors

Kitakyushu, Japan

Tsuyoshi Asanuma