Motor control device controlling synchronous motor
US9438158B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 2015 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Jan 30, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control device includes: a calculating unit for calculating a speed reference value that decreases as a torque command increases; a determining unit for determining a magnitude relationship between a speed command and a speed reference value calculated for a torque command by the calculating unit; a q-axis-current commanding unit for generating a q-axis current command on the basis of a torque command and an inverse number of a torque constant of the synchronous motor when a speed command is smaller than a speed reference value, and generating the q-axis current command on the basis of a function of which independent variable is a speed command, the torque command, the inverse number of the torque constant, and when a speed command is equal to or larger than a speed reference value; and a d-axis-current commanding unit generating a d-axis current command, on the basis of a q-axis current command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.