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. 02, 1991
Filed:
Mar. 22, 1989
Richard W Reynolds, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
This invention relates to an integrated drive generator of the type employed onboard aircraft for power generation and prime mover starting. Prior art integrated drive generators which provided for a prime mover starting mode drove a prime mover through a constant speed transmission in order to provide motive power to the engine. The present invention provides a power path for prime mover starting which couples the motor/generator directly to the prime mover and decouples the motor/generator from the transmission by means of properly oriented one-way clutches. The integrated drive generator includes in combination in input/output shaft, and motor/generator having a rotor shaft, a constant speed transmission having an input and an output, a start power path coupling the motor/generator rotor shaft to the input/output shaft whereby the motor/generator, functioning as a motor, drives the input/output shaft as an output shaft, bypassing the transmission, to thereby start the prime mover coupled to the input/output shaft, and a generate power path coupling the input/output shaft to the transmission input and coupling the transmission output to the motor/generator rotor shaft whereby the prime mover drives the motor/generator as a generator at constant speed through the input/output shaft, functioning as an input shaft, and the transmission to produce constant frequency electrical power from the motor/generator for aircraft electrical equipment.