The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 1977
Filed:
Dec. 12, 1975
Itaru Kawasaki, Minoo, JA;
Kouichi Yamaguchi, Hirakata, JA;
Yoshiaki Igarashi, Neyagawa, JA;
Kazutsugu Kobayashi, Takatsuki, JA;
Matsushita Electric Industrial Co., Ltd., Kadoma, JA;
Abstract
An electronic control apparatus for controlling currents supplied to star-connected multiphase loads. The apparatus has two sets of switching means, a reference signal source, a voltage detector for detecting the voltage of the common terminal of the star-connection, a comparator for comparing the outputs of the voltage detector and the reference signal source, a feedback amplifier for amplifying the output of the comparator, a load current supplying means for supplying a current to the multiphase loads through one set of the two sets of the switching means according to a command signal, a feedback current draining means coupled to the feedback amplifier and the other set of the two sets of the switching means, and a timing signal generator for selectively switching the two sets of the switching means, wherein the feedback current draining means drains the current through said other set of switching means from the multiphase loads so as to keep the voltage at the common terminal of the star connection constant or substantially constant regardless of the mode of the timing signal generator.