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:
Nov. 20, 1984
Filed:
Jun. 28, 1982
Yoshiteru Takahashi, Yamakita, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A brushless motor comprising seven or more armature windings mounted on a stator, a field magnet mounted on a rotating shaft to rotate therewith with respect to the armature windings, a plurality of semiconductor commutating devices, each being connected to one of the armature windings, and Hall sensors for detecting the polarity of magnetic fields immediately opposite the windings. Each commutating device controls the direction of the electric current to be fed to its respective armature winding, according to the magnetic polarity detected by the Hall sensors. The armature windings are connected together at one end thereof and are connected to respective commutating devices at the other ends thereof.