|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||219/501 ; 219/203 ; 219/490 ; 219/497|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 11 인용 특허 : 3|
A controller system using high frequency switching by providing a bilateral switch gated on and off at a frequency about ten times the source frequency and the duty cycle determined by pulse width modulation of the high frequency waveform in accordance with window heater temperature.
An electrical resistance heater controller, for controlling application of power from an AC source to a heating element, comprising: bilateral switching means for maintaining or interrupting the circuit between the source and the heating element; gating means for turning said switching means on and off periodically at a frequency at least about an order of magnitude higher than the source power frequency, said gating means being receptive of and responsive to a temperature signal from a sensor proximate said heating element, and said gating means control...