120kW급 IGBT 인버터의 열 응답 특성 실시간 모델

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 26; no. 2; pp. 184 - 191
• Main Authors: 임석연(Seok Yeon Im), 차강일(Gang Il Cha), 유상석(Sang Seok Yu)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2015
• Subjects: 기계공학; Inverter; Dynamic thermal response; IGBT(Insulated gate bipolar mode transistor); 실시간 시뮬레이션; 동적열응답; 전력변환기; Real time simulation
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2015.26.2.184

As the power electronics system increases the frequency, the power loss and thermal management are paid more attention. This research presents a real time model of dissipation power with junction temperature response for 120kw IGBT inverter which is applied to the thermal management of high power IGBT inverter. Since the computational time is critical for real time simulation, look-up tables of IGBT module characteristic curve are implemented. The power loss from IGBT provides a clue to calculate the temperature of each module of IGBT. In this study, temperature of each layer in IGBT is predicted by lumped capacitance analysis of layers with convective heat transfer. The power loss and temperature of layers in IGBT is then communicated due to mutual dependence. In the dynamic model, PWM pulses are employed to calculation real time IGBT and diode power loss. Under Matlab/Simulink$^{(R)}$ environment, the dynamic model is validated with experiment. Results showed that the dynamic response of power loss is closely coupled with effective thermal management. The convective heat transfer is enough to achieve proper thermal management under guideline temperature.