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Senior Power Electronics Hardware Engineer

4 months ago


Tucker, United States Sonnen Inc Full time
Job DescriptionJob Description


We are looking for passionate people who believe in themselves and the impact they make on product they work on. You will join a team with a culture based on solid values such as trustworthiness, collaboration, dedication, excellence, attention to details, quality designs and innovations.

As a Senior Power Electronics hardware engineer, you will work in the Power Electronics (PWX) Hardware development group. This role is responsible for owning the power electronics hardware design and development of power converters from the scratch to production floor. Also responsible for validation of the design & creating the engineering specifications, Creating engineering documents, topology selection, design reviews, schematics design, component selection, Creating layout in Altium, release documentation for production and reliability study and assessment while supporting the product manufacturing and product testing.

This position is a “In person” position based out of the Innovation Hub located in Stone Mountain, Georgia. This role needs to be agile, professional, and comfortable in a rapidly changing environment. The right person is trustworthy who works hard even when no one is noticing.

Key Responsibilities:

  • Design of single phase and 3 phase bidirectional inverters with aim to gain maximum efficiency and cost competitive design.
  • Understand the marketing specification and derive/chose proper topology to meet the cost, efficiency and performance targets.
  • High voltage power semiconductor selection, switching behaviour and what to expect before the test knowledge, able to calculate all the losses in the converter /inverter system, perform reliability, cost analysis with Si/SiC/GaN MOSFET's, Diodes systems, deep knowledge on gate drive and protection circuit design.
  • Derive individual converter Spec from Master spec and estimate power budget of individual converter.
  • Good understanding of UL1741, IEC62019 and IEC 60730 and applying it on design.
  • Understand the product certification process and know how on design level to make the compliance testing smoother (UL, CSA, FCC, etc.)
  • Design with isolated and non-isolated topologies- major focus on non-isolated designs.
  • Design with active and passive cooling systems.
  • Ownership of power layout and techniques for reduction of noise, EMI EMC reduction and other parasitic and taking product to EMI EMC laboratories and Inhouse pre compliance testing.
  • In Depth understanding of magnetics and ability to design and build magnetics for prototype evaluation.
  • Testing and troubleshooting to solve complex problems under pressure and provide feasible solutions in the short and long term.
  • Good communication skills and documentation skills.
  • Self-driving must be able to work as a team in small interdisciplinary groups and independently.

Travel 5% of the time

Specific Skills / Abilities:

  • Strong understanding of power electronics system including Inverters, Converters, 4-wire ,3-Wire AC systems, Single phase , Two phase and Three phase systems, unbalanced operation, grounding schemes, Leakage current etc.
  • Strong knowledge of safety procedures working with hazardous current and voltage levels
  • Ability to understand complex schematics and board layouts (Altium)
  • Strong understanding of signal integrity, noise issues, signal processing for power electronics environments.
  • Direct experience and involvement in designs using IGBT/MOSFET/GAN or other switching devices and Gate driver design, selection, characterization.
  • Should be able to lift minimum of 50Lbs weight and should be able to stand for over 6 hours on job.
  • Working with Contract manufacturers for final production support.
  • Good understanding of digital control for power electronics, DSP and microcontrollers.
  • Familiar with PV, Energy Storage Systems, DC fast charging equipment, and generators, Grid simulators operation.
  • Outside-the-box thinker eager to work on new power conversion technologies and willing to derive innovative testing solutions for advanced power electronics.
  • Ability to work in a dynamic, diverse, multicultural, and cross-functional team.

Education / Experience

  • Must have designed hard switching bidirectional AC/DC, DC/DC & DC/AC (Single, 3 Phase) topologies.
  • Five or more years of first-hand experience on medium to high power converter (up to 15KW) design and development
  • Electrical/Electronics/Power Engineering degree or higher specialization degrees with power electronics major.
  • Experience with high voltage up to 1000V or more and high-power levels >2KW.
  • Strong knowledge of power electronics systems working principles, including AC/DC, DC/AC, DC/DC, AC/AC conversion and grid-connected converters.
  • Experience conducting test on multi-converter module systems, verifying individual converter module functionality as well as system-level/converter stack operation.
  • Strong hands-on testing and troubleshooting experience.
  • Must have a strong sense of development ownership, responsibility and working commitment.