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. 17, 1984
Filed:
Jan. 21, 1983
Applicant:
Inventor:
John Rosa, Pittsburgh, PA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318722 ; 318803 ; 318717 ;
Abstract
An adjustable speed machine-commutated inverter-synchronous motor drive includes control of the inverter at a selected rate without positioning. The line converter is controlled so as to maintain a relation I=f(T) and the relation E/l=g(T) is established by applying to the field regulator loop a reference which is a function of T, where T is the torque, I the current drawn by the motor drive and E the excitation voltage. Accordingly, the torque is not sensed. The functions are chosen so that the commutation margin angle is safe under natural commutation by the EMF of the motor and also chosen to improve drive operation.