Senior Power Electronics Engineer

2 weeks ago

Louisville, Kentucky, United States H3X Technologies Full time
Job Title: Sr. Power Electronics Engineer

We are seeking a highly skilled Sr. Power Electronics Engineer to join our team at H3X Technologies. As a key member of our core engineering team, you will be responsible for the development and production of our high-performance integrated motor drives (IMDs).

Responsibilities:
  • Requirements definition based on DO-160G and internal/customer specifications
  • Explore new architectures/technologies to improve performance, safety, and reliability
  • Schematic and PCB design in Altium
  • Powerstage component sizing
  • Circuit simulation in Simplex, MATLAB/Simulink, LTSpice
  • Multiphysics simulation in Ansys Q3D for current density and parasitics analysis
  • Low inductance DC Link design
  • Design for EMC (Y capacitors, EMI filter, grounding)
  • Design for DO-160G
  • Supply chain management for DC link capacitors, busbars, PCBAs, SiC devices, sensors, EMC filter, and connectors
  • Bill of Materials documentation management
  • Create assembly files and build instructions for manufacturing team/partners
  • Create Design Validation Plan and Report (DVP&R) for sub-systems as well as completed system
  • Execute inverter testing and characterization on H3X in-house dynamometer
  • Post process test results, identify root-cause of potential issues and make design recommendations to meet the highest level of reliability and performance
  • Testing for EMC and DO-160G
  • Inverter reliability and partial discharge testing
  • Support pilot customers with first builds and integration into vehicles. Travel and on-site visits will be required.
Requirements:
  • Masters or higher in Electrical Engineering
  • 5+ years of professional experience with power electronics
  • High level of proficiency with Altium, MATLAB, and PLECS/LTSpice
  • Excellent written and verbal communicator to effectively share knowledge and build the collective mindshare of the company
  • Organized and obsessive attention to detail: no room for oversight when designing flight critical systems
  • Humble and open mind: willingness to accept feedback and learn, consistently improve upon yourself and the product you will be responsible for
  • A high degree of emotional intelligence: ability to collaborate closely with coworkers in a respectful and empathetic manner
  • Fundamentally curious and motivated by first principles
Preferred Qualifications:
  • Experience with taking an inverter from concept to production in automotive or aerospace
  • Experience with DO-160G / DO-254 / FAA Part 33 qualification
  • Experience with EMI noise mitigation and testing
  • Understanding of Field Oriented Control and PMSMs
  • SolidWorks proficient
Company Benefits:
  • Employee equity incentive plan
  • Health insurance: medical, vision, dental, short-term disability, and life
  • Gym membership stipend
  • Flexible hours (deliverable-based goals)
  • Flexible-time off (just need manager approval)
  • Mental health coverage
  • Relocation package
  • Epic/IKON Ski & Snowboard Pass
  • Bi-weekly company happy hours
About H3X Technologies:

H3X Technologies is a U.S.-based manufacturer of electric motors for sustainable aviation, marine, industrial, and defense applications. We have developed a family of integrated motor drives that can scale in power from 30kW to 30MW with power densities as high as 12 kW/kg and best-in-class efficiency. This high performance is enabled by novel scalable core technology and proprietary manufacturing processes for motor stacking, winding, and assembly. The design, manufacturing, and testing of our products is done in-house at our headquarters in Louisville, Colorado. Our world-class team is composed of experts from Tesla, SpaceX, GE Aviation, and Siemens with deep knowledge in electric machines, power electronics, material science, control systems, and advanced manufacturing. We take pride in our multidisciplinary approach, relentless dedication, high capital efficiency, and Skunkworks-style execution. H3X has raised over $20M with backing from top VC firms and strategic firms, including Lockheed Martin, Hanwha, Y Combinator, Cubit Capital, Metaplanet, TechNexus, and Liquid 2 Ventures. We are poised to become the world's leading supplier of advanced electric motors by 2030 to drive deep decarbonization in aviation, marine, and heavy industrial applications and unlock next-generation electrified defense technology to strengthen national security.

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