Motor drive device, electric blower, electric vacuum cleaner, and hand dryer
US12021468B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2018 |
| Grant date | Jun 25, 2024 |
| Priority date | — |
| Expiry date | Aug 10, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/154
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A motor drive device includes a single-phase inverter that converts a direct-current voltage into an alternating-current voltage applied to a motor. The motor drive device includes a control power supply outputting power having a voltage lower than the direct-current voltage. The motor drive device includes a drive signal generation unit driven by the power. The drive signal generation unit generates drive signals driving switching elements of the inverter. The motor drive device includes a power supply switch operating so as to allow supply of the power from the control power supply to the drive signal generation unit when a rotation speed of the motor is higher than a threshold. The power supply switch operates so as to stop the supply of the power from the control power supply to the drive signal generation unit when the rotation speed is lower than the threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.