Motor control device
US9209727B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2014 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | May 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/5395
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control device includes a PWM signal generating unit comparing PWM command voltage and carrier wave with each other to generate pulse signal so that duty is increased or decreased in both directions of phase lag and phase lead with one phase within carrier period as reference regarding one phase of three-phase PWM signal. The unit generates pulse signal so that duty is increased or decreased in one of the directions with one phase as reference regarding another phase. The unit generates pulse signal so that duty is increased or decreased in direction reverse to the one direction with one phase as reference regarding the other phase. The unit generates three-phase PWM signal pattern so that a current detecting unit is capable of detecting two-phase current in synchronization with advent of two predetermined time-points within carrier wave period of PWM signal with first to third phases being normally fixed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.