Washing Machine Diagram / September 4, 2018 / Penny Brenner.
Most appliance manufacturers have now found it advantageous to employ a small switch or micro-switch, to stop the spin action. An actuator protruding from the lid of the automatic washer causes the switch to open before the lid is raised 2 inches. Electrical, either type of spin-stop lid or door safety switch is usually connected to wires between the spin solenoid and the timer. In this way, when the operator raises the lid during spin, the switch opens and the timer circuit to the spin solenoid is broken. By keeping the actuator clean and free of debris, you can avoid unwanted appliance repair service calls.
Washing machines usually employ a single-phase motor. In semi-automatic washing machines, a purely mechanical switch controls the timing and direction of the motor. These switches are costly and wear out easily. Presented here is a washing machine motor controller for single phase motors of washing machines that efficiently replaces its mechanical equivalent.
Old Washer Spin Enable Switches: A mercury type spin-stop lid or door safety switch was used on most automatic washer appliance models until very recently. This device is mounted by a bracket to the lid hinge. This position ensures proper operation of the appliance, which depends on mercury within the capsule to make or break the contact. When the appliance owner raises the lid during spin, the mercury in the switch capsule runs away from the switch contacts, and the timer circuit to the spin solenoid is broken.
Basically, a single-phase motor requires a master timer, which decides the time for which the motor should keep rotating (washing time), and a spin direction controller, which stops the motor for 3 seconds after every 10 seconds and then resumes rotation in opposite direction.