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The converter valve is the critical link of AC and DC system and the most commonly used switching devices for converter valve are thyristors. The performance of thyristors could significantly affect the performance of converter valve while the transient characteristics and second order effects of thyristor are critical to determine the reliability of converter valve in HVDC (High Voltage Direct Current)...
Parallel-connected IGBTs are prone to large-current destruction in high-power applications due to current unbalance between each IGBT branches. This paper proposes a novel control method to improve the current balance in order to protect the device against over current destruction. The method uses two control loops to confine the current rising speed as well as to reconcile the current change start...
Several topologies of high voltage input DC/DC power supply are investigated firstly in this paper and then a novel gate control strategy for cascade SiC MOSFET stack using a single standard gate driver is proposed. Thereafter, operation principles including both static sate and switching transitions are analyzed. The LTspice simulation results validate the analysis and show the availability of the...
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