CAJ | 학술논문

针对桥式拓扑中MOSFET因栅极驱动信号振荡产生的桥臂直通问题,分析了振荡与驱动电路各参数之间的关系,并设计了一种驱动电路.该电路结构简单、工作频率高、延迟时间小、抗干扰能力强,因而非常适用于高频感应加热电源.理论分析和实验结果表明,经过改进的驱动电路解决了驱动信号振荡问题,从而保证了MOSFET在高速应用场合的可靠运行.所设计的电路已应用于530kHz/2.5 kW感应加热电源,实验波形证明了其合理性和有效性.
침대교식탁복중MOSFET인책겁구동신호진탕산생적교비직통문제,분석료진탕여구동전로각삼수지간적관계,병설계료일충구동전로.해전로결구간단、공작빈솔고、연지시간소、항간우능력강,인이비상괄용우고빈감응가열전원.이론분석화실험결과표명,경과개진적구동전로해결료구동신호진탕문제,종이보증료MOSFET재고속응용장합적가고운행.소설계적전로이응용우530kHz/2.5 kW감응가열전원,실험파형증명료기합이성화유효성.
Due to the Miller effect in the conversion process of the same bridge arm in two power devices,the gate drive signal will produce oscillations,which inteffers the normal drive signal and brings effects on the normal work of power seriously.By the working principle,the relation between the oscillation and the parameters of the driving cireuit is analyzed,and the optimal drive circuit is devised simultaneously.Both the theoretic analysis and experimental results indicate that the improved circuit can solve the oscillation problem,and meet the MOSFET drive requirement Derfecfly.It has the advantages of simple structure,high operation frequency,short delay time and strong anti-jamming ability.The ex-perimental waveform sampled from a 530 kHz/2.5 kW induction heating power supply is given to verify the availability of the proposed drive circuit.