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Paulo Henrique Alves Silva e Silva
Programa de Pós-Graduação em Engenharia Elétrica, Universidade Federal de Santa Maria, RS
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Eduardo Cattani Silva
Programa de Pós-Graduação em Engenharia Elétrica, Universidade Federal de Santa Maria, RS
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Lucas Rossato Rocha
Programa de Pós-Graduação em Engenharia Elétrica, Universidade Federal de Santa Maria, RS
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Paulo R.Eckert
Universidade Federal do Rio Grande do Sul, UFRGS
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Rodrigo Padilha Vieira
Programa de Pós-Graduação em Engenharia Elétrica, Universidade Federal de Santa Maria, RS
Keywords:
ANSYS, finite elements analysis, Foster thermal, SiC MOSFET and Typhoon Hil
Abstract
High performance inverters are key components in electrical applications. The operating capacity, efficiency and life cycle of inverters can be limited by the magnitude of losses and external factors such as ambient temperature and humidity. To attenuate high levels of temperature, the use of heat exchange systems with liquid cooling is recurrent to reduce the temperature level and increase the full efficiency of the system. This papper presents the thermal study of losses in power modules and liquid cooling sinks that are performed and implemented in ANSYS to obtain thermal parameters, using Finite Elements Analysis (FEA). From the thermal impedance of the system and implementation of the Foster thermal network, the heatsink is validated in the software Typhoon Hil, making it possible to obtain the heatsink’s cooling profile for different loads connected to a three-phase inverter. In the validation step, a 50 kW RL load was connected to the three-phase inverter to evaluate the heatsink cooling capacity for different inverter operating conditions.