Adjustable circuit for personal electric cleaning care appliance
US10418928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2015 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Dec 2, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An adjustable circuit for a personal electric cleaning care appliance comprises comprising a power supply portion and a driver is disclosed. The driver comprises a transducer, a drive coil and an iron core of the drive coil, and a drive shaft of the transducer is equipped with cleaning elements. The adjustable circuit comprises a microchip processor and an H-bridge drive circuit. By connecting a capacitor bank and the drive coil in series at load ends of the H-bridge drive circuit, at least a part of the capacitors of the capacitor bank is controllably connected in series with the drive coil or disconnected from the drive coil, the capacitance of the connected capacitor can be controlled so that the current flowing through the drive coil is controllably limited to a certain value, thereby, the motion amplitude of the cleaning elements can be controlled, and no additional electromagnetic interference will occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.