The demand for green hydrogen is growing as the increasing production of pure can no longer be based on fossil hydrocarbons. As water electrolysis would move from niche to a significant consumer emission-free electricity, efficiency electrolytic gas production, lifetime systems, and balance in electricity grid become essential. operational investment costs an industrial-scale alkaline electroly...

Press-pack insulated gate bipolar transistor modules (PP-IGBTs) have been widely used in high-voltage and high-power-density applications, such as direct-current (HVDC) converters, because of their advantages low thermal resistance, double side cooling, short-circuit failure mode. Package is one the main reasons for IGBT module failure. condition monitoring key to realizing fault diagnosis, pre...

Due to the constant changes of environment and load, insulated-gate bipolar transistor (IGBT) module is subjected a large amount junction temperature (Tj) fluctuations, which often leads damage bond wires. The monitoring parameters IGBTs are coupled with Tj, increases difficulty IGBTs’ health status online. In this paper, based on collector current (Ic) collector-emitter on-state voltage (Vce_o...

Failure mode effects and criticality analysis (FMECA) is a commonly adopted approach to defining, assessing, reducing possible failures in designs, systems, processes, products, services. Traditional FMECA ranks the failure modes of products based on risk priority number (RPN), which obtained by multiplying elements. Conventional has shortcomings badly handling unknown information unreasonably ...

The unprecedented growth in industrial motor drives over the past decade resulted from the process improvements demanded by the automation industry. With the increased speed of modern micro-controllers and digital signal processors and the reduced Insulated Gate Bipolar Transistor (IGBT) drive package size, coupled with the low maintenance of ac motors, multiple machine configurability has been...

In power distribution network, distribution static compensator (DSTATCOM) is used for enhancing power quality. This paper investigates the application of DSTATCOM with non-stiff source connected to distribution network to enhance power quality. The model discussed in this paper is designed to have reduced DC-link voltage rating without compromising compensation capability when non-linear loads ...

This paper presents a novel variable-frequency motor drive system for a three-phase induction machine. In this drive system, the machine is excited by unidirectional stator currents shaped and sequenced such that a rotating air-gap flux is induced so that the machine can operate. Due to the unidirectional nature of the currents, an “inverter” that incorporates only three active, insulated-gate-...

A novel zero-voltage and zero-current-switching (ZVZCS) full-bridge pulsewidth modulation converter is presented to simplify the circuits of the previously presented ZVSCS converters. A simple auxiliary circuit, which consists of one small capacitor and two small diodes, is added in the secondary to provides ZVZCS conditions to primary switches, as well as to clamp secondary rectifier voltage. ...

In this paper, an H-bridge inverter topology with reduced switch count technique is introduced. This technique reduces the number of controlled switches used in conventional multilevel inverter. To establish a single phase system, the proposed multilevel inverter requires one H-bridge and a multi conversion cell. A multi conversion cell consists of three equal voltage sources with three control...