Motor driving curcuit and permanent magnet synchronous motor
US9231507B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2012 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Feb 12, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor driving circuit includes a magnetic-pole-position detecting unit that detects a rotating position of a rotor of a permanent magnet synchronous motor, a voltage output unit that converts a direct-current voltage and generates a driving voltage for the permanent magnet synchronous motor, a voltage control unit that controls the voltage output unit on the basis of a comparison result of a modulation wave and a carrier wave, a voltage-phase adjusting unit that determines, using a differential amplifier circuit that receives a rotating speed control signal and an offset signal, a phase of the modulation wave generated by the voltage control unit and causes the voltage control unit to generate the modulation wave in the determined phase, and an offset generating unit that generates the offset signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.