Power Supply To Motor - Electrolux EWM09311 Service Manual

21.7.3 Power supply to motor

The PCB powers the motor via a triac; changes in the direction of rotation are achieved by switching the
contacts on the two relays (K3-K4), which change the connection between the rotor and the stator.
In certain models, a third relay (K5) is used to power the stator (full or half field) according to the spin speed.
The motor speed is controlled by the signal from the tachometric generator.
During the spin phases, the micro-processor performs the anti-foam and the anti-balancing check procedure.
1. Main circuit board
2. Door safety interlock
7. Universal motor
8. Tachometric generator
9. Stator
10. Rotor
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Technical Support - DMM 599 75 58-67 Rev. 04