Hybrid stepping motor, driving method for the same and coil winding method for the same
US5444316A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1993 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Jul 27, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ten-phase and twenty-main pole hybrid stepping motor is driven by a five-phase driving pulse. The rotor has N and S pole tooth gears at ends of a rotor shaft. The stator has a cylindrical hollow body. Nos. 1-20 main poles extend from an inner wall of the hollow body toward the rotor shaft in a plane perpendicular to the rotor shaft so that the twenty main poles surround the N and S pole teeth in the plane perpendicular to the rotor shaft. Each main pole has a free end at which two stator teeth are formed. The stator teeth face the teeth of N and S pole teeth gears. A coil is wound around each main pole for excitation of the main pole. Nos. 1-10 main poles and Nos. 11-20 main poles face each other in the radial direction of the rotor respectively. An arbitrary main pole and a fifth next main pole always have a 90-degree relation. Positions of the teeth on Nos. 1-10 and Nos. 11-20 main poles are respectively determined by an expression with non-overlapping m being substituted: EQU Pt.times.k+m.times..theta. where Pt represents the rotor tooth pitch, .theta. represents the magnitude of the stepping pitch, m represents an arbitrary integer between 0 and 9, k represents an arbitrary i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.