CAJ | 학술논문

桌船用直流电机的励磁控制系统因吸收电路中的吸收电阻发热导致MOSFET管烧毁.基于励磁控制系统主电路的吸收环节,即一种采用调频板给予电路中MOSFET管PWM信号的带整流桥的降压电路拓扑结构,在确定电路中滤波电容与励磁绕组阻抗值大小的前提下,从吸收电阻耗能、降低MOSFET管开通峰值电流、交流端输出幅值电压3个方面考虑,对该吸收电路环节中电阻、电容参数的选择进行了仿真实验研究和最优选取.结果表明适当增大吸收电容和吸收电阻参数值可以有效地抑制开关管开通峰值电流,而且前者会增加吸收电阻的耗能功率,后者可以减小开关管开通时流过吸收电阻的冲击电流.从而得出结论,正确选择吸收电阻、电容参数值可以满足该励磁控制电路的稳定性和可靠性.
탁선용직류전궤적려자공제계통인흡수전로중적흡수전조발열도치MOSFET관소훼.기우려자공제계통주전로적흡수배절,즉일충채용조빈판급여전로중MOSFET관PWM신호적대정류교적강압전로탁복결구,재학정전로중려파전용여려자요조조항치대소적전제하,종흡수전조모능、강저MOSFET관개통봉치전류、교류단수출폭치전압3개방면고필,대해흡수전로배절중전조、전용삼수적선택진행료방진실험연구화최우선취.결과표명괄당증대흡수전용화흡수전조삼수치가이유효지억제개관관개통봉치전류,이차전자회증가흡수전조적모능공솔,후자가이감소개관관개통시류과흡수전조적충격전류.종이득출결론,정학선택흡수전조、전용삼수치가이만족해려자공제전로적은정성화가고성.
In an excitation control system of ship DC generator,the MOSFET was burnt out due to the overheating of absorption resistor in absorption circuit.The absorption circuit of excitation control system is based on the Buck converter topology with the rectifier,which adopts a frequency modulation module to provide PWM signal for the MOSFET.With known filter capacitor and excitation winding impedance,the parameter selection is studied and simulated for the resistor and capacitor of absorption circuit in three aspects:the dissipative energy of resistor,the turn-on peak current of MOSFET and the output AC voltage amplitude.Results show that,the appropriate increase of resistor and capacitor parameters can restrain the turn-on peak current.The increase of resistor will increase its dissipative energy and the increase of capacitor will decrease the turn-on impact current through the resistor.The conclusion is that,the parameters of the absorption resistor and capacitor should be selected properly to satisfy the stability and reliability of excitation control circuit.