System and method for sensor less magnetic field control of a motor
US7116070B2 · kind B2 · utility
23Cited by
19References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 15, 2005 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Jul 15, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for sensor less control of a stepper motor is described. The system and method includes estimation of the position of a rotor of the motor by way of sensing circuitry on the windings of the motor, without the use of positional sensors. The system and method of stepper motor control further includes magnetic field optimization for increasing the torque generating component of a magnetic field generated by stators of the motor, and magnetic field weakening for countering some of the effects of back electromotive force generated by the magnetic rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.