Polyphase motor, particularly for driving an indicator needle
US5880551A · kind A · utility
25Cited by
6References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1997 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Oct 21, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polyphase motor formed by a stationary member excited by electric coils and by a magnetized rotor. The rotor has N pairs of poles magnetized radially in alternating directions, N being equal to 4 or 5. The stationary member has at least two W-shaped circuits each including an electric coil surrounding the central strut. The W-shaped circuits are arranged so that when one of the central struts is opposite a magnetic transition, the other central strut is roughly opposite a magnetic pole. Pole shoes of the central struts of the two W-shaped circuits can also be spaced at 120.degree. angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.