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. 04, 1986
Filed:
Nov. 25, 1983
Applicant:
Inventors:
Kjeld Hellegaard, Nordborg, DK;
Hans Doktor, Aarhus C, DK;
Assignee:
Danfoss A/S, Nordborg, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
363 56 ; 363 89 ; 363 98 ;
Abstract
The invention relates to a current supply apparatus in which galvanic separation between the control portion and the high voltage portion is provided and has the feature of a rapid interruption of an overcurrent upon overload, such as, short-circuiting. Control pulses for the chopper and inverter transistor thereof are fed to a base control circuit by way of an opto-coupler and the gate feedable with an appropriate blocking signal on overcurrent is disposed between the opto-coupler and the base control circuit for the chopper and for the transistor of the inverter that are connected to the current return line of the inverter.