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This paper examines the use of a dual bridge inverter topology for an induction machine drive application. The paper considers the possibility of using a dual bridge inverter with one bridge floating to generate multilevel output voltage waveforms. The charging and discharging of the floating capacitor will be controlled using redundant switching states. The use of this topology can improve system...
A high frequency SiC MOSFET-based three-phase, 2-level power module has been designed, simulated, assembled and tested. The design followed a built-in reliability approach, involving extensive finite-element simulation based analysis of the electro-thermo-mechanical strain and stress affecting the switch during both manufacturing and operation: structural simulations were carried out to identify the...
This paper presents the design and operation of a portable Current Injection Unit (CIU) to be used in conjunction with the Active Impedance Estimation (AIE) technique for fault location in DC electrical distribution systems. The AIE technique injects a current transient into the system and monitors the resultant voltage transient. By combining these measurements in the frequency domain, the real and...
The technology of direct AC/AC power conversion (Matrix converters) is gaining increasing interest in the scientific community, particularly for aerospace applications. In this paper a repetitive control system is proposed to regulate the output voltage of a four-leg matrix converter for a power supply application. The target application is a Ground Power Supply unit (GPU) for aircraft servicing where...
This paper deals with the design, control, and implementation of a three-phase ground power-supply unit for aircraft servicing. Instead of a classical back-to-back converter configuration, a three-phase direct ac-ac (matrix) converter has been used as the power conditioning core of the power supply, working in conjunction with input and output LC filters. An optimized control system in the ABC frame...
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