Circuit arrangement for load-dependent control of current flow time in motor windings of self-timed bipolar stepper motors
US8148933B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2009 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Jul 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for automatic, load-dependent control of at least one winding current of a respective motor winding of a self-timed bipolar stepper motor, includes a first power driver circuit for a first motor winding and a second power driver circuit for a second motor winding. The circuit arrangement includes a first XOR gate and a second XOR gate, and a first resistor connected so as to couple the first XOR gate to an anode of a first diode. A cathode of the first diode is coupled to the comparator input of the first power driver circuit via a second resistor. A third resistor is connected so as to couple the second XOR gate to an anode of a second diode. A cathode of the second diode is coupled to the current-controlling comparator input of the second power driver circuit via a fourth resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.