Inductorless variable voltage appliance power supply
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United States of America Patent
Stats
-
Oct 22, 2002
Grant Date -
Dec 13, 2001
app pub date -
Apr 9, 2001
filing date -
Apr 10, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A transformerless non-switched mode power supply for use with whiteware appliances having a water heating element. 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 appliance controller to vary the motor torque as required.
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Family
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