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:
Jun. 07, 1977
Filed:
Jan. 07, 1974
Hendrik Jan Bergmans, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A DC motor having a permanent magnet rotor and two Hall effect elements relatively displaced 90.degree. for switching the currents in the stator windings as a function of the rotor position. The stator includes at least two windings. An output transistor for each winding controls the current flow therein and the base currents thereof are supplied from a common source of constant current. First and second control transistors have their base electrodes connected to the output terminals of the Hall elements and their output electrodes coupled to the base electrodes of the output transistors. In any position of the rotor only one output transistor can conduct and each winding can be fully energized at most over an angle of 120.degree..
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile