Microcomputer control of stepper motor using reduced number of parts
US4847544A · kind A · utility
12Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1988 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Mar 28, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stepper motor control circuit having a reduced number of discrete components is provided by using an on-chip analog to digital converter of a single chip microcomputer to control the waveforms of chopped winding currents. Four power MOSFET's, four diodes and two sense resistors can be added to the circuitry of a board populated by the single chip microcomputer to implement a full step motor controller. The addition of a holding current circuit frees the computer for servicing other tasks when the motor is idle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.