Stepping motor exciting system
US4477756A · kind A · utility
54Cited by
2References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1982 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Dec 3, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stepping motor exciting system in which the excitation current is set at one of four stepwise values. When the motor is to be driven in a stepwise manner, the excitation current is in the form of a pseudo-trapezoidal wave which is derived in terms of two of possible four values. When the motor is to be driven in a linear manner, the excitation current is in the form of a pseudo-sinusoidal wave which is derived in terms of all four possible values. A ROM stores these sequences of excitation currents and controls the exciting system in accordance with the driving mode desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.