Motor drive system and method capable of suppressing heat generation during low speed operation
US11223317B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Nov 26, 2019 |
| Grant date | Jan 11, 2022 |
| Priority date | — |
| Expiry date | Dec 5, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/68
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive system capable of suppressing heat generation during a low speed operation may include: an inverter including a plurality of switching elements to convert direct current power to alternating current power having a plurality of phases; a motor driven with the alternating current power converted in the inverter; and a controller determines an operating point of the motor on the basis of a torque command of the motor and generates a d-axis current command and a q-axis current command corresponding to the operating point. In particular, when each of the switching elements is overheated, the controller changes the d-axis current command and the q-axis current command by changing the operating point to a different operating point corresponding to a torque of the same magnitude as the torque command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.