Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1995-04-07
1996-12-24
Ip, Paul
Electricity: motive power systems
Induction motor systems
Primary circuit control
318814, 318822, 62187, 62155, 62156, 361156, H02P 7622
Patent
active
055876420
ABSTRACT:
An air conditioner having a fan motor brown-out control algorithm for increasing the air conditioner fan speed upon sensing a brown-out under-voltage condition is provided. The air conditioner has a power supply connected to an AC line voltage, a fan motor, a multispeed fan driven by the fan motor and means for sensing a brown-out condition of the AC line voltage. The sensing means is connected to the power supply and provides a signal indicative of a brown-out condition. The air conditioner also has means for increasing the speed of the fan in response to the sensed brown-out condition signal provided by the sensing means. In an embodiment, the air conditioner further has a microprocessor and related circuitry for adjusting the speed of the fan. In another embodiment, logic circuitry is provided instead of a microprocessor. A brown-out control algorithm for an appliance having a multispeed fan and components for operating the fan is also provided. The brown-out control algorithm has the steps of providing a voltage input, sensing a brown-out condition of the voltage input by determining if a brown-out state exists for a predetermined amount of time, and configuring the electrical circuitry and components to increase the speed of the fan in response to the sensed brown-out condition.
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Davis William L.
Manson Larry J.
Scriber Chris A.
Ip Paul
Whirlpool Corporation
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