APPLIANCE POWER SUPPLY

摘要

A transformerless non-switched mode power supply for use with whiteware appliances having a water heating ele- ment. A high power voltage dropping resistor is used in series with a rectifier and a switching device phase controls the mains half waves to produce a variable voltage direct current supply for an appliance motor. The voltage dropping resistor is formed by the water heater element and the DC supply voltage is controlled by the applianc e controller to vary the motor torque as required.