Stepping motor speed control method and apparatus suitable for the same
US7436146B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2005 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Jan 22, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/43097
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A speed control method of controlling a stepping motor to have a uniform instantaneous speed and an apparatus suitable for the same are provided. The stepping motor speed control method includes: calculating a repeated speed error for each phase while rotating a stepping motor at a constant speed and storing the calculated repeated speed error phase by phase; measuring a rotation speed of the stepping motor; sequentially and repeatedly reading the stored repeated speed errors phase by phase by synchronizing with the rotation of the stepping motor; and controlling the speed of the stepping motor with reference to the target speed, the measured speed and the repeated speed error for each phase. Accordingly, the stepping motor speed control apparatus rotates a stepping motor at a uniform instantaneous speed by controlling a rotation speed of the stepping motor phase by phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.