Stepper motor driver circuit
US5264770A · kind A · utility
Inventor
Key dates
| Filing date | Mar 12, 1992 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Mar 12, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Applying current to a pair of stepper motor windings on alternating phases of a common drive clock reduces cross-noise in the opposing winding due to current switching which could otherwise cause false triggering of the phase current drivers. The positional accuracy of the motor is controlled by the selective removal of the current supplied to each motor winding. The falling phase current in one winding is precisely regulated by the time constant determined from the rising phase current phase in the other winding. Closely monitoring and controlling the phase currents in each motor winding efficiently reduces motor resonance due to self-generation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.