Motor control device and electric power steering device provided with same
US12388382B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2023 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Oct 30, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A field-weakening controller determines a d-axis current command correction value in a field-weakening control according to a voltage of a DC power supply and a voltage amplitude of a voltage command. A d-axis current final value calculator outputs a d-axis current command final value calculated using a d-axis current command value and a d-axis current command correction value. A field-weakening controller has a voltage amplitude command limiter that limits a voltage amplitude command determined based on the power supply voltage. A voltage amplitude command limiter limits the voltage amplitude command to a voltage amplitude command limit value when the motor state quantity, which is correlated with a time rate of change when a sine wave center voltage of the voltage command crosses from negative to positive, is equal to or greater than a predetermined limit start value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.