Motor drive device, electric blower, electric vacuum cleaner, and hand dryer
US11316465B2 · kind B2 · utility
0Cited by
9References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 23, 2018 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Mar 29, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive device includes a single-phase inverter that converts a direct-current voltage output from a power supply which is a battery, into an alternating-current voltage. The inverter outputs the alternating-current voltage as an applied voltage to be applied to a motor. The applied voltage is lower when the direct-current voltage is a second voltage lower than a first voltage than when the direct-current voltage is the first voltage. Consequently, a discharge current of the battery is reduced, and the motor drive device capable of reducing an increase in battery temperature can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.