Cooktop appliance with improved power control

Details Cooktop appliance with improved power control Cooktop appliance with improved power control

1987-01-05

1994-03-08

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219492, 219485, 219506, 219508, 323319, H05B 102

Patent

active

052930289

ABSTRACT:
A cooking appliance adapted for energization by a standard domestic household power supply employs a power control arrangement which accommodates electric resistive heating units designed for operation at a maximum RMS voltage level less than the RMS voltage level of the output power signal of the domestic power supply. The power control system couples power pulses from the external power supply to the heating unit at one of a plurality of available pulse repetition rates, each repetition rate establishing a corresponding RMS voltage level for application of power to the heating unit. The repetition rate associated with the maximum user selectable power setting for the appliance is effective to apply an RMS voltage level to the heating unit which corresponds to the voltage level for which the heating unit was designed. When a heating unit is turned from Off to On the power control system overdrives the unit at full supply voltage for a brief transient heat up period to rapidly heat the unit to its radiant temperature. The duration of this heat up period is controlled as a function of the elapsed time since the unit was last turned Off.

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patent: 4404461 (1983-09-01), Sitek et al.
patent: 4443690 (1984-04-01), Payne et al.

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