Motor driving control device and motor control method
US10886863B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2018 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Dec 21, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor driving control device has a motor driving unit that has a plurality of switching elements and supplies a drive current to three-phase coils of a motor, a control circuit unit for sequentially switching energization patterns of the three-phase coils by outputting a drive control signal for operating the plurality of switching elements to the motor driving unit, and a current detection circuit for detecting a voltage value corresponding to a magnitude of the drive current. the control circuit unit includes a voltage comparison unit for comparing the magnitude of the drive current with a predetermined current threshold value based on the voltage value each time switching of the energization patterns is performed, and a disconnection determination unit for determining whether any one phase of the motor is in a disconnection state, based on a comparison result of the voltage comparison unit for the plurality of energization patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.