Abstract: An induction heating system (40) is provided and includes a plurality of induction heating coils (118). Touch control pads (50, 52, 70, 72) are provided together with circuitry (80) for generating energization control signals. Circuitry (112, 116) is provided for electrically energizing the induction heating coils (118). An electronic digital processor (82) is responsive to the energization control signals for generating energization signals for actuating and controlling the energization circuitry (112, 116) to thereby vary the energization of the plurality of induction heating coils (118).

Abstract: An induction heating system (40) is provided and includes a plurality of induction heating coils (118). Touch control pads (50, 52, 70, 72) are provided together with circuitry (80) for generating energization control signals. Circuitry (112, 116) is provided for electrically energizing the induction heating coils (118). An electronic digital processor (82) is responsive to the energization control signals for generating energization signals for actuating and controlling the energization circuitry (112, 116) to thereby vary the energization of the plurality of induction heating coils (118).

Abstract: An induction heating system (40) is provided and includes a plurality of induction heating coils (118). Touch control pads (50, 52, 70, and 72) are provided together with circuitry (80) for generating energization control signals. Circuitry (112 and 116) is provided for electrically energizing the induction heating coils (118). An electronic digital processor (82) is responsive to the energization control signals for generating energization signals for actuating and controlling the energization circuitry (112 and 116) to thereby vary the energization of the plurality of induction heating coils (118). Circuitry (150 and 152) is provided for maintaining touch control pads (50, 52, 70 and 72) operable when an operator is in contact with a pan disposed adjacent the plurality of induction heating coils (118).

Abstract: This specification discloses an induction heating cook-top including touch controls for controlling the operation thereof. The cook-top includes a source of direct current voltage and a first heating unit having a first induction heating coil connected to the direct current voltage source and an SCR having an anode coupled to the coil and a cathode connected to AC circuit ground. The system further includes a second heating unit including a second induction heating coil and a second SCR connected between the second coil and the source of direct current voltage. The second SCR includes a cathode connected to AC circuit ground. Circuitry is provided to apply gating pulses to both of the SCRs in order to control the heating of the induction heating coils. A touch control system is provided to control the heating level of the induction heating coils and includes heat control touch pads for increasing or decreasing the energization of the coils.

Abstract: The specification discloses a touch control panel particularly adapted for use with an induction heating cook-top. The panel includes a plate of insulating material such as glass having outer and inner planar surfaces separated by a predetermined thickness. Discrete conductive film areas such as tin oxide are formed on the outer planar surface of the plate. A printed circuit board includes a plurality of pairs of spaced apart conductive regions formed of copper or the like thereon. Springs are provided to urge the printed circuit board continually against the inner surface of the plate, such that the pairs of conductive regions are disposed in a predetermined symmetrical orientation below the film areas on the outer surface of the plate. Circuitry is connected on the printed circuit board and is coupled to the conductive regions in order to generate electrical signals in response to contact with the film area by a finger of the operator.