Brushless motor and washing machine provided with same
US9973138B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2015 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Sep 2, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/032
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless motor includes: a motor including a stator around which a winding wire is wound and a rotor holding a permanent magnet; a motor control microcomputer; an inverter circuit in which a power element is incorporated and controls an amount of a voltage applied to the winding wire; a temperature detecting element which detects a temperature of the power element; and a current detecting element which detects a power supply current or a current of the winding wire. A first current limit value is defined by current limit value which is set such that a junction temperature of the power element does not exceed a predetermined value, the brushless motor sets a second current limit value which is higher than the first current limit value, and the brushless motor operates, based on the second current limit value only in a predetermined period after start-up of the brushless motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.