Mitsubishi Electric Corporation

Satoshi Tesen

Toru Ogawa

Hideaki Arita

Masafumi Sugawara

Shoji Ishikawa

Hitoshi Yoshizumi

Akihiro Daikoku

Tomoya Uchimura

A sensor core () is arranged in a plane (P), which is positioned on sides of opposite ends of plungers () from bosses (), and which is perpendicular to a direction of movement of the plungers (). A magnetic sensor () is arranged at a position in the plane (P), the position being apart from a magnetic path (A) of a leakage flux of a magnetic circuit (A).

Electromagnetic actuator

The magnetic resistance of a magnetic path that passes through a coil () is increased by magnetically dividing a stator core into a plurality of divided cores () in such a manner that the magnetic flux of a permanent magnet () flows through the magnetic path when a projection () of a plunger () magnetically connects the divided cores (), hence the magnetic resistance of the magnetic path that passes through the coil () rapidly changes due to a positional relationship between a gap between the divided cores () and the plunger (), and the magnetic flux that flows through the magnetic path rapidly changes, and moreover a large back electromotive force is produced.

An electromagnetic actuator () includes sensor magnets () disposed correspondingly to plungers (), respectively. The electromagnetic actuator () further includes a sensor core () made of a magnetic material and disposed in a position through which magnetic fluxes from the plurality of sensor magnets () can flow, and a magnetic sensor () that is disposed in a part of the sensor core () through which the magnetic fluxes of the plurality of sensor magnets () can flow in common, and that detects the magnetic flux, which varies in accordance with respective positions of the plurality of plungers ().

Growing community of inventors

Tokyo, Japan

Satoshi Tesen