Hitachi, Ltd.

Tooru Kitayama

Hideo Aoki

Motoo Futami

Yasuo Notohara

Hideo Uzuhashi

Tunehiro Endo

Kenichi Iizuka

A current controller has provided therein assumed response generating means and load model means so as to realize repetitive type control with no influence of control delay against a periodically repetitive current response. This current controller is applied to a 120-degree current flow type motor using a pulse width modulation inverter, so that the DC current control including the process of response to the rise of the current can be realized only by a microcomputer.

Current controller for controlling a current flowing in a load using a

An inverting apparatus comprises: a capacitor input type rectifying circuit consisting of a full-wave rectifier and a smoothing capacitor; a single-phase bridge inverter having four semiconductor switches; and a driving control unit for opening and closing the semiconductor switches, wherein the smoothing capacitor is provided with a switch to open and close the smoothing capacitor.

Inverting apparatus

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Tochigi, Japan

Tooru Kitayama