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With the demands for increasing the power rating and improving reliability level of the high power IGBT modules, there are further needs of understanding how to achieve stable paralleling and identical current sharing between the chips. This paper investigates the stray parameters imbalance among parallel chips inside the 1.7 kV/1 kA high power IGBT modules at different frequencies by Ansys Q3D parastics...
This paper describes the design and development of a 6 kA/1.1 kV non-destructive testing system, which aims for short circuit testing of high-power IGBT modules. An ultra-low stray inductance of 37 nH is achieved in the implementation of the tester. An 100 MHz FPGA supervising unit enables 10 ns level control accuracy of the short-circuit duration, protection triggering, and acquisition of the electrical...
Bond wires fatigue is one of the dominant failure mechanisms of IGBT modules. Prior-art research mainly focuses on its impact on the end-of-life failure, while its effect on the short-circuit capability of IGBT modules is still an open issue. This paper proposes a new electro-thermal simulation approach enabling analyze the impact of the bond wires fatigue on the current and temperature distribution...
Thermal impedance of IGBT modules may vary with operating conditions due to that the thermal conductivity and heat capacity of materials are temperature dependent. This paper proposes a Cauer thermal model for a 1700 V/1000 A IGBT module with temperature-dependent thermal resistances and thermal capacitances. The temperature effect is investigated by Finite Element Method (FEM) simulation based on...
Design of a Non-Destructive Test (NDT) set-up for short-circuit tests of 1.7 kV, 1 kA IGBT modules is discussed in this paper. The test set-up allows achieving short-circuit current up to 10 kA. The important objective during the design of the test set-up is to minimize the parasitic inductance and assure equal current sharing among the parallel connected devices. Achieving of a low inductance level...
Advances in power electronics enable efficient and flexible interconnection of renewable sources, loads and electric grids. While targets concerning efficiency of power converters are within reach, recent research endeavors to predict and improve their reliability to ensure high availability, low maintenance costs, and therefore, low Levelized-Cost-of-Energy (LCOE) of renewable energy systems. This...
This paper studies an fast calculating method of IGBT, then introduces several different PWM techniques in converters. It further compared the MVA rated three-phase IGBT converter's loss rates under different PWM means. Based on the lowest power loss, it presents the most desirable PWM method.
This paper describes an active voltage control for IGBT connected in series. The gate drive circuit not only amplifies the control signal, but also control the IGBT's dv/dt and over voltage during switching transient. This make the switching performance less dependent on IGBT itself. This paper provides a stability analysis to judge the controller stability. The experiment results show the IGBT voltage...
This paper proposes an improved method to describe power losses in IGBT converters. This method includes dependency of voltage, current and temperature, and it could be fast and accurate. Since the relative higher converter dissipation is one of the main barriers in high power applications, it is further compared the MVA rated three-phase IGBT converter's loss rates under different operating frequency,...
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