Patent ID: 9572201
Date: 2017-02-14
CPC Classifications: H05B

Claim:
1. An induction heat cooking apparatus comprising: a rectifier that rectifies an input voltage to output a DC voltage; an inverter that switches the DC voltage outputted through the rectifier to generate an AC voltage; a first heating element operated by the AC voltage applied from the inverter; a second heating element connected in parallel to the first heating element, the second heating element being operated by the AC voltage applied from the inverter; and a switching signal generator that generates control signals for the inverter to control an operational state of each of the first and second heating elements according to a received operational mode signal, wherein the inverter includes a first switch, a second switch, and a third switch which are connected in series between a positive power terminal and a negative power terminal, wherein the switching signal generator includes a first gate circuit and a second gate circuit coupled to respective ones of the first to third switches of the inverter, and wherein each of the gate circuits include: a bootstrap circuit including at least one diode and at least one capacitor, and a driver connected to the bootstrap circuit in parallel and configured to generate a switching control signal based on the bootstrap circuit, wherein the driver in the first gate circuit is coupled to the first and third switches, and the driver in the second gate circuit is coupled to the second switch.