Stepper motor control device
US4516064A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Feb 15, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04C3/143
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present control device is used in connection with a diphase or polyphase stepper motor in which the coils of two phases (b.sub.i, b.sub.j) are not simultaneously supplied with driving current. A commutation circuit CC is adapted to connect the coils to a voltage source V or to a detection circuit CD. A logic control circuit CL.sub.1, CL.sub.2, CL.sub.3, itself controlled by a clock signal source G.sub.1 and by a generator of programmed control pulses PG, supplies control signals to said circuits CC and CD. The control device provides a feedback control of the motor as a function of the speed and the position of the rotor at various instants of the control cycle in accordance with a predetermined program so as to assure perfectly reliable operation of the motor with a minimum of electric energy even for motors manufactured with rather wide manufacturing tolerances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.