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:
Mar. 30, 1976
Filed:
Oct. 10, 1974
Applicant:
Inventor:
Takashi Tsuboi, Katsuta, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318376 ; 318380 ;
Abstract
A regenerative brake control system for controlling an armature current of DC motor by on-off operation of a chopper through resistor means which is connected in series with the DC motor and is appropriately divided into sections is disclosed. In the system, the notching operation of the resistor means is controlled in such a manner that the duty cycle of the chopper immediately following the short-circuiting of one section of the resistor means is to be the minimum value tolerable to the chopper.