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:
Nov. 01, 1983
Filed:
Apr. 27, 1981
George B Yundt, Cambridge, MA (US);
William P Curtiss, Winthrop, MA (US);
The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US);
Abstract
A frequency control system for an n-phase induction machine having an input shaft and at least one output line, where n is an integer. The system includes a generator that provides an electrical frequency control signal, f.sub.e, which is representative of the difference between the phase of the voltage on the output line and the phase of a reference signal. The system further includes a generator for providing a mechanical frequency control signal which is representative of the frequency of rotation of the input shaft to the induction generator. Another generator provides a torque generator control signal which is representative of the difference between the electrical frequency control signal and the mechanical frequency control signal. A torque generator, such as an internal combustion engine, is adapted to be responsive to the torque generator control signal for applying a torque to the input shaft of the induction machine, where the applied torque is related to the torque generator control signal.