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This paper presents an improved phase leg power loop design for enhance mode lateral structure Gallium Nitride (GaN) transistors. Static characterization results of a 650V/30A GaN transistor are presented to determine the design parameters of the gate driver circuits. The control of Common Mode (CM) noise current propagation is considered during the gate driver design by optimizing the power distribution...
This paper shows a gate driver design for 1.7 kV SiC MOSFET module as well a Rogowski-coil based current sensor for effective shortcircuit protection. The design begins with the power architecture selection for better common-mode noise immunity as the driver is subjected to high dv/dt due to the very high switching speed of the SiC MOSFET modules. The selection of the most appropriate gate driver...
This paper presents an improved phase leg power loop design for enhance mode lateral structure Gallium Nitride (GaN) transistors. Static characterization results of a 650V/30A GaN transistor are presented. The gate driver circuit is designed based on the characterization results. In order to reduce current commutation loop inductance within the GaN phase leg, an improved power loop design with vertical...
This paper presents the analysis of mixed mode noise in an H-bridge PWM converter. Based on the definition of differential mode (DM) and common mode (CM) noise voltage source and noise current and the time domain voltage and current relationship, noise prediction models are proposed in frequency domain for CM, DM and mixed mode (MM) noise with the consideration of system symmetry regarding the noise...
With silicon carbide (SiC) devices increasing in commercial availability, high switching frequency is becoming a general trend to increase the power density of power converters. High switching frequency operation nonetheless exacerbates EMI emissions in a system, for which accurate EMI models of power converters are needed to predict noise and aid in the design of their EMI filters. Accordingly, this...
This paper proposes a detailed step-by-step design procedure for the input and output EMI filter of a matrix converter (MC) driving a 30 kW permanent magnet synchronous motor. The procedure involves modeling the EMI source and conduction path in the frequency domain, the design of the passive components, and the estimation of the EMI filter weight and volume. Finally, a weight comparison between the...
This article presents the development and experimental performance of a 10-kW high-power-density three-phase ac-dc-ac converter. The converter consists of a Vienna-type rectifier front end and a two-level voltage source inverter (VSΓ)To reduce the switching loss and achieve a high operating junction temperature, the SiC JFET and SiC Schottky diode are used. Design considerations for the phase-leg...
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