AC fan motor driving circuit having detecting current wave capability
US7282888B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2005 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Apr 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driving circuit of an AC fan motor has an AC to DC converter, a current detecting unit, a step-down divider, a motor driving unit, two windings each having many coils and a harmonic wave elimination unit. The AC to DC converter converts AC power to high voltage DC power. The motor driving unit is connected to the step-down divider to obtain low voltage DC power to operate. The two windings are directly connected to the AC to DC converter through the current wave detect unit to obtain the high voltage DC power. Therefore, the current wave detecting unit can response current changes of windings and then an operator can simulate present current wave of the windings to determine the present operating status of the AC fan motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.