Abstract
Due to nonlinearity and uncertainty of induction cooker system, it is difficult to establish an accurate mathematical model for control purpose. This paper proposes an appropriate fuzzy control strategy for controlling pan temperature of induction cooker system, without an accurate control model. In induction cooker system, the temperature feedback is from the glass countertop instead of the pan. Thus, the control precision needs be improved. The proposed fuzzy controller selects suitable output powers according to slew rates of the glass countertop temperature variation. It effectively reduces the temperature error between pan and glass countertop, which keeps the food in pan at a constant temperature. The proposed method is verified using the induction cooker with output power of about 1800W. Compared the fuzzy controller with PID controller in this system, a conclusion can be drawn that the fuzzy controller can provide a faster, more accurate and more stable temperature control.
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