EP 0422423 A3 19920603 - DRIVE MOTOR CONTROL METHOD IN LARGE DOMESTIC APPLIANCES, ESPECIALLY IN WASHING MACHINES AND LINEN DRIERS
Title (en)
DRIVE MOTOR CONTROL METHOD IN LARGE DOMESTIC APPLIANCES, ESPECIALLY IN WASHING MACHINES AND LINEN DRIERS
Publication
Application
Priority
DE 3933786 A 19891010
Abstract (en)
[origin: EP0422423A2] 1. Drive motor control method in large domestic appliances, especially in washing machines and linen dryers. 2.1. The washing sequence during a washing or drying process is intended to be optimised in such a manner that values which are always reproducible and constant can be achieved. In known appliances of the type under discussion, the drum drive takes place in a purely time limited manner via program switching mechanisms or time switches. However, because of fluctuations in the mains, this always results in different drum rotation speeds and hence different washing sequences. Using the method according to the invention, the drive motor is driven precisely via the number of drum rotations to be executed. In consequence, the washing sequences remain constant and are reproducible. 2.2. The said drive takes place by presetting a nominal number of revolutions. The preset nominal value is defined either in numbers of revolutions, drum centre angle degrees or by the number of tacho periods emitted by the tacho generator. 2.3. The method is used in washing machines or linen dryers. Transfer in an analogous manner to dishwashers is possible.
IPC 1-7
IPC 8 full level
D06F 33/02 (2006.01)
CPC (source: EP US)
D06F 34/08 (2020.02 - EP US); D06F 2101/10 (2020.02 - EP US); D06F 2103/24 (2020.02 - EP US); D06F 2105/28 (2020.02 - EP US); D06F 2105/58 (2020.02 - EP US)
Citation (search report)
- [X] FR 2384054 A1 19781013 - HOTPOINT LTD [GB]
- [X] FR 2384055 A1 19781013 - HOTPOINT LTD [GB]
- [A] DE 2818286 A1 19791031 - BAUKNECHT GMBH G
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0422423 A2 19910417; EP 0422423 A3 19920603; DE 3933786 A1 19910418
DOCDB simple family (application)
EP 90118065 A 19900920; DE 3933786 A 19891010