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:
Feb. 05, 1991
Filed:
Sep. 19, 1989
Wayne A Flygare, Rockford, IL (US);
Richard C Welch, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
An integrated drive generator (40) for generating constant frequency alternating current which is driven by a drive shaft (12) at variable rotational speeds includes a constant speed drive having an input coupled to the drive shaft and at least one output which rotates at a fixed rotational velocity in response to the drive shaft rotating at a variable velocity and which drives a first drive shaft at a fixed rotational velocity and a second drive shaft at a fixed rotational velocity, an alternating current generator (23), having a rotor (37) mounted on a first shaft (42), with an outside periphery having a second radius farthest from an axis of rotation of the first shaft; an exciter (20) having a rotor (32) mounted on the first shaft, electrically coupled to a field winding of the generator, for supplying electrical power to the field winding of the alternating current generator; a permanent magnet generator (18), having a rotor (24) mounted on the second shaft, electrically coupled to the exciter, for supplying electrical power to a field winding of the exciter, with an outside periphery having a second radius farthest from an axis of rotation of the second shaft and wherein a sum of the first and second radii is greater than a distance between axes of rotation of the shafts.