Stepping motor controller
US5844394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1997 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Sep 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The stepping motor controller of the present invention includes: a stepping motor including a rotor and an excitation coil; a drive section for supplying multiple-stage drive current to the excitation coil in response to an input command value, thereby enabling a micro step drive; a control section for controlling the stepping motor by varying the command value to be provided for the drive section; and a position detection control section for generating a detection signal in accordance with a rotation position of the rotor. The control section switches two operation modes of a first operation mode and a second operation mode, the control section varies the command value to be provided for the drive section based on a timing generated by the control section itself in the first operation mode, and the control section varies the command value to be provided for the drive section based on a timing corresponding to the detection signal generated by the position detection control section in the second operation mode, thereby controlling the stepping motor. The control section switches the two operation modes during a series of transportation operations for transporting the stepping motor…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.