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:
Apr. 16, 1985
Filed:
Jan. 20, 1983
Kinzo Wada, Yokohama, JP;
Abstract
A D.C. commutatorless electric motor comprises a rotor having a permanent magnet, first and second Hall elements for detecting rotational angle of the rotor according a magnetic field formed by the permanent magnet of the rotor, first and second stator coils respectively coupled to the first Hall element through first and second switching elements, third and fourth stator coils respectively coupled to the second Hall element through third and fourth switching elements, first impedance control element for controlling impedances of the first and second switching elements, and a second impedance control element for controlling impedances of the third and fourth switching elements. One terminal of the first and second stator coils is coupled to a positive power source terminal, and the other terminal of the first and second stator coils is coupled at a common connection point to the third and fourth stator coils which have one terminal coupled to a negative power source terminal. The first impedance control element is coupled to the common connection point.