Two step power output motor and associated HVAC systems and methods
US6172476A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Aug 13, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical control system for an induction motor for achieving optimum efficiency at both full and partial loads at markedly reduced electrical components costs while maximizing reliability over the range of load, and for achieving a two step motor power output in a greatly simplified manner, the circuit having an electrical induction motor adapted for connection to line electrical power at maximum motor operating frequency, and to a second source of electrical power at approximately one half of the maximum operating frequency, wherein an electrical switch is provided for selectively connecting each power source to the motor, wherein the second source is a reduced frequency wave form generator for producing a reduced frequency wave form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.