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:
Dec. 23, 1986
Filed:
Dec. 03, 1985
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A brushless DC motor which can be started positively by using a single position detecting element. The motor has a starting circuit which forcibly energizes the stator coils thereby to start rotating the rotor. The position detecting element produces n position signals corresponding to n positions of the rotor at which a specific stator coil is to be energized. When the position detecting element produces one of the n position signals, the motor begins to energize the stator coils according to position signals obtained from counter electromotive forces generated in the stator coils. Further, one of the n position signals produced by the position detecting element is made different from the other, a reference position signal can be obtained.