Thermal Protection of Laundry-Appliance Motors

Laundry-appliance motors have displayed considerable evolution through the 1960´s, and this has led to more critical demands on the thermal protector. This evolution is forecast to continue with still increased efficiencies in the utilization of active materials and the development of advanced insulating materials. These demands were understood by engineers experience in designing thermal-protection systems to be the signal for the development of an advanced generation of laundry-appliance thermal protectors. Application conditions relevant to the design of a thermal protector forlaundry-appliance motors, the interpretation of the effects of these conditions, and the conception of a new thermal protector are described. This protector is then examined in an actual application to a motor and in its operating characteristics; it is also examined in the light of possible changes of application conditions.