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 TPBN1_UKTJ

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