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:
May. 24, 1977
Filed:
Sep. 05, 1975
Kinzo Wada, Yokohama, JA;
Abstract
A three-phase brushless DC motor has three power transistors with their collector-emitter paths connected to the respective stator windings, and two Hall effect devices each having a pair of control current electrodes and a pair of Hall voltage electrodes. One of the Hall voltage electrodes of the Hall effect devices is connected to the base electrodes of the first and second power transistors and the other Hall voltage electrodes are connected together by a combining network which delivers a resultant voltage to the base electrode of the third power transistor. A voltage dividing and balancing network is connected between the base electrodes of the first and second transistors and between the control current electrodes of the Hall effect devices to drive the stator windings with three-phase commutating currents of equal amplitude.