Automatic variable speed motor drive bypass
US8779698B2 · kind B2 · utility
13Cited by
15References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2011 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Jul 23, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4935
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An HVAC system includes a blower motor and a variable speed motor drive. The variable speed motor drive is configured to receive line power and provide modulated power to the motor. The blower motor is configured to produce airflow in response to the modulated power. A unit controller is configured to bypass the variable speed motor drive to provide the line power directly to the blower motor in the event that a measured airflow is less than a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.