Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor, method of operating an electronically commutated motor, and circuit
US4390826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1980 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Apr 17, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B40/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of operating a laundry machine. The machine has a pair of rotatable components and is driven by an electronically commutated motor having a stationary assembly with a plurality of winding stages and also having a rotatable assembly adapted to be selectively coupled to at least one of the rotatable components. In this method, a DC voltage for application to the motor is received, and a first control function is imposed on the operation of the machine to control the application of the DC voltage in accordance with a selected one of a plurality of first waveshapes so as to provide a resultant effective voltage to the motor. A second control function is imposed on the operation of the machine through the controlled application of the DC voltage to selectively set the maximum amplitude of the effective voltage, and the winding stages are commutated by applying the effective voltage thereto in sequence whereby the first and second control function jointly determine the angular velocity of the at least one rotatable component. A laundering apparatus, a control system for an electronically commutated motor, a method of operating an electronically comutated motor, and a circuit are…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.