Motor drive device and electric vehicle system
US12395108B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2021 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Jan 25, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60L2240/427
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive device controls torque generated by a motor, based on a d-axis current and a q-axis current. The motor drive device includes a d-axis current instruction generating unit that calculates a first d-axis current instruction, a current instruction correcting unit that generates a positive correction quantity that is added to the first d-axis current instruction when a voltage across terminals of the motor is equal to or larger than a given value, and a voltage feedback control unit that generates a negative correction quantity that is added to the first d-axis current instruction to prevent the voltage across the terminals of the motor from exceeding a given maximum output voltage. The motor drive device controls the torque, based on a second d-axis current instruction created by adding the positive correction quantity and the negative correction quantity to the first d-axis current instruction and on a q-axis current instruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.