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Cooling system becomes a serious concern due to weight and volume contribution of power electronics system in aerospace sector. This research investigates the contribution of cooling system to the total weight of power electronics converter when liquid metal cooling is applied. In addition, it is compared with the traditional working fluid (water). It is concluded that cooling system could be much...
The high-speed switching of SiC MOSFET allows power converter to operate with higher frequency and lower switching loss. However, it tends to aggravate dv/dt effect due to the impact of parasitic parameters, resulting in shoot-through and high device stress in the half bridge configuration. In this study, a compact and high-speed gate driver is developed and optimized for SiC half bridge module. The...
This paper evaluates different passive filter topologies of the grid-connected high power density converter (HPDC) for the purpose power quality control and electromagnetic interference (EMI) reduction. The harmonics generated by the switching circuits in the HPDC affect power quality at lower frequency as well as EMI at higher frequency. Various common passive filter topologies are carefully evaluated...
Cooling systems significantly contribute to the total mass and/or volume of power electronic systems especially for aerospace application where it will directly increase the operating cost of the aircraft. This paper investigates the heat sink parameters that contribute to the thermal resistance as well to weight of the high power density converter. The lowest heat sink thermal resistance for any...
This paper presents the power density developments of high-power isolated dc-dc converter to be utilized in a higher voltage direct-current (HVDC) power-supply system of a data center. This technique results in a prototype of dc-dc converter unit which is smaller by factor of ten when compared with the conventional one, and the area of power-supply system becomes much smaller than before. Consequently,...
In this paper, a design of high output power density 400/400V isolated dc/dc converter for power supply in data center is discussed. The isolated DC/DC converter uses the hybrid pair of SJ-MOSFET and SiC-SBD power devices. A high accuracy of DC/DC converter analysis is carried out by considering the intrinsic and extrinsic loss parameter of power devices and circuit board. Based on this analysis,...
In this paper, the performance of high output power density 400/400 V isolated dc/dc converter for power supply in data center is investigated. The isolated dc/dc converter uses the hybrid pair of SJ-MOSFET and SiC-SBD power devices. A high accuracy of dc/dc converter analysis is carried out by considering the intrinsic and extrinsic loss parameter of power devices and circuit board. Based on this...
Connecting distributed generations (DGs) into distribution system has presented a challenge of controlling voltage profile in distribution system. In the presence of DGs, voltage profile of distribution system becomes non-uniform and may result in large voltage fluctuation at loads. Therefore, there is need for strict limitation on power injected by DGs. This paper proposes an effective method to...
A method for minimizing circulating current and balancing power transformer in loop distribution line of an industrial park is proposed. The proposed method uses a series type back-to-back (BTB) converter in loop distribution line of industrial park. Loop distribution line is formed by tying end of two radial lines by a looping wire. Looping wire has a re-closer circuit breaker to localize fault inside...
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