EP0160868A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Brushless motor
Assignee: Yaskawa Electric Corp
•
Filing: 1985-04-19
•
Granted: —
•
Expires: 2005-04-19
Abstract
Abstract In a brushless motor, the number of magnetic poles P and the number of salient poles S are identified by: wherein m represents the number of phases and k represents an integer more than 2; and the windings wound about the k adjoining salient poles are made to belong to the same phase.
Inventors
- 👤 Takashi C/O Kabushiki Kaisha Yaskawa Katsuma
- 👤 Masao C/O Kabushiki Kaisha Yaskawa Kitoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 19:09
CPC Classifications
H; H02; H02K; H02K29/00; H02K29/06; H02K29/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
153 words
A brushless motor having a rotor magnet with the number P of magnetic poles and a stator core facing the rotor magnet through an air gap, the stator core having the number S of salient poles about which stator windings are wound in the form of m phase, the rotor magnet being driven into rotation by detecting the rotary position of the rotor magnet relative to the stator core and by sequentially changing over phase currents passing through the stator windings, wherein said numbers P and S are defined as wherein k represents an integer more than 2, and wherein only those stator windings among said stator windings belonging to the same phase are wound about the same salient pole of said stator core; and the windings wound about the salient poles of one of 2 x m salient groups belong to the same phase, said salient group comprising adjoining k salient poles.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.