Variable speed fan motor
US9306479B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2013 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Apr 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable speed fan motor, including: a variable speed motor and a motor controller. The motor controller includes a microprocessor, an inverter circuit, a gear detection circuit, and a power supply unit. The gear detection circuit includes a plurality of Hall current sensing units. Each second power input line is connected with a first input end of each of the Hall current sensing units. Second input ends of the Hall current sensing units are connected in parallel, and are connected with a second AC input end of the power supply unit. An output end of the Hall current sensing unit is connected with an input end of the microprocessor. The microprocessor selects operating parameters according to an energized signal of the second power input lines and controls the variable speed motor to operate in accordance with the selected operating parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.