Motor control device and motor system
US8305022B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2010 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Mar 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2203/11
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control device has first to third amplifiers which amplify voltage generated at first to third shunt resistances connected to first to third drivers to supply driving current of each of three phases to a three-phase brushless motor, first to third sample-hold circuits which sample and hold voltage amplified by the first to third amplifiers, a multiplexer which sequentially selects and outputs voltage values held by the first to third sample-hold circuits, an A/D converter which performs A/D conversion on output signals of the multiplexer, and an arithmetic unit which calculates the driving current through an output signal of the A/D converter, estimates a magnetic pole position of the motor based on the driving current, and performs pulse width modulation (PWM) control on the driving current by controlling the first to third drivers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.