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This paper presents the development of modular dual-half-bridge (MDHB) bidirectional dc-dc converter as the dc-dc stage of 10 kVA single phase solid state transformer (SST) for future renewable electric energy distribution and intelligent power management systems. The dc-dc converter, connected to 12 kV DC bus generated by an ac-dc rectifier interfacing with 7.2 kV electric utility grid, is to provide...
Reductions in the size and weight of medium-voltage power converters are essential for saving space of power conversion systems and cutting their cost. Volumes of magnetic components such as transformers and LC filters are significant in medium-voltage power converters. High-switching-frequency operation is essential for reducing the volume of magnetic components. In this work, hybrid pairs of 6 kV...
A new generation of Power MOSFET technology has been introduced. The devices are manufactured in a standard 0.35??m CMOS production line with only few process modules being adapted for the requirements of vertical power transistors with a 2x improvement in Figure of Merit (FOM). This improvement results mainly from the reduction in Miller capacitance.
Auxiliary power supplies for traction rolling stock are used to power the carriage service facilities and control systems that are essential to keep a train operational. The design of converters for such applications is quite challenging, since the traction environment requires high performance systems that can manage a range of harsh environmental and electrical requirements without compromising...
An on-chip buck converter with 3D chip stacking is proposed and the operation is experimentally verified. The manufactured converter achieves a maximum power efficiency of 62% for an output current of 70mA with a switching frequency of 200MHz and a 2x2mm on-chip LC output filter in 0.35mum CMOS. The use of glass epoxy interposer to increase the maximum power efficiency up to 71.3%, and the power efficiency...
This paper gives a general approach to the development of duty cycle sweep (DCS) in fixed switching frequency pulse width modulated (PWM) strategies based on microcontroller. The flexibility of the PWM signal generated is characterized by: 1) Fixed duty cycle or variable between 0% and 100%. 2) Duty cycle sweep in both directions: increase from 0% to 100% and decrease from 100% to 0%.3) duty cycle...
On the background of the general necessity for power electronic equipment to rise efficiency and to avoid power dissipation, especially in high switching frequency applications, a simple, reliable circuit is presented, which allows to recover snubber energy by using a self oscillating DC to DC converter. The features of the circuit are pointed out by measurements. The universal applicability is experimentally...
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