Power Electronics Engineer

Power Electronics Engineer Dynex Semiconductor Ltd Power Assemblies Design Full time Permanent THE OPPORTUNITY We are seeking an experienced Electrical / Power Electronics Design Engineer to join our team and support the design, development, analysis, testing and validation of high-power semiconductor assemblies and power conversion systems.

The role covers the complete electrical design process, from system-level analysis and semiconductor selection through to detailed assembly design, simulation, testing, technical documentation and customer support. KEY RESPONSIBILITIES * Analyse three-phase power systems, including six-pulse, twelve-pulse and multi-pulse rectifier topologies. * Perform transformer analysis, including star-star, star-delta, delta-star and delta-delta configurations. * Assess harmonics, power factor, commutation overlap, voltage regulation and fault currents. * Analyse transformer and semiconductor interaction, including leakage reactance, switching losses, reverse recovery and semiconductor stress. * Design high-voltage series-connected and high-current parallel-connected diode and thyristor assemblies. * Develop voltage and current sharing networks, including tolerance and worst-case assessments. * Design RC snubbers, surge suppression and crowbar protection systems. * Design low-inductance busbars and current paths, considering current density, short-circuit forces, stray inductance and thermal performance. * Carry out steady-state and transient thermal analysis for convection, forced-air and water-cooled systems. * Establish design margins, derating strategies and lifetime assessments. * Support testing, validation, technical investigations and customer requirements through to final technical documentation.

ABOUT YOU You will be an experienced Electrical or Power Electronics Engineer with a strong understanding of high-power electrical systems and semiconductor applications. You will have: * A degree in Electrical Engineering, Power Engineering or a related discipline. * At least 5 years' relevant experience in a power electronics or high-power electrical engineering environment. * Strong knowledge of transformers, power semiconductors and three-phase power systems. * Experience using simulation tools such as SPICE and PLECS. * The ability to perform first-principles engineering calculations and technical investigations. * Strong analytical and problem-solving skills, with the ability to work independently and take ownership of complex engineering requirements. * Good communication skills and the ability to work with customers and cross-functional teams.

Experience in one or more of the following would be advantageous: * Industrial rectifiers * HVDC systems * Marine propulsion converters * Pulse power systems * Fusion energy equipment * Rail traction or FACTS systems The successful candidate will be capable of taking a customer requirement from AC system and transformer analysis through semiconductor selection, stack and protection design, thermal verification, busbar design, testing and final technical documentation. REF-231 028 JBRP1_UKTJ

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