Job Information
H3X Technologies Sr. Power Electronics Engineer in Louisville, Colorado
JOB PURPOSE:
At H3X (https://www.h3x.tech/) , we are building the most advanced electric propulsion systems in the world to enable sustainable electric aircraft. At 12 kW/kg continuous, the HPDM family of integrated motor drives is a step change in electric propulsion technology and removes one of the main barriers blocking widespread proliferation of electric aircraft. We have several power classes of motors ranging from 30kW to 3MW and are selling to markets of aviation, aerospace and defense, marine, and specialized ground vehicles.
The HPDM motors includes an integrated Silicon Carbide inverter for high frequency, precise motor control. We are looking to hire a Sr. Power Electronics Engineer who will be in charge of inverter development and taking the design from prototype to production for one of our HPDM IMDs. You should be experienced in the entire product development cycle including requirements definition, design and analysis, and test and validation. You will be a key part of the core engineering team and will have a direct impact on the trajectory of the company.
RESPONSIBILITIES:
REQUIREMENTS / CONCEPT
Requirements definition based on DO-160G and internal/customer specification
Explore new architectures/technologies that will improve performance, safety, and reliability
DESIGN AND ANALYSIS
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
PROTOTYPE AND MANUFACTURING
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
TESTING AND VALIDATION
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
INTEGRATION
Support pilot customers with first builds and integration into vehicles. Travel and on-site visits will be required.
OTHER
Hire other world-class engineers to support your team
Maintain prototype and testing equipment in H3X lab
REQUIRED QUALIFICATIONS:
High intelligence, high energy, and high integrity
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 my first principles
U.S. Person status is required as this position needs to access export-controlled data.
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
SALARY RANGE: $100,000 - $160,000 USD
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
THE COMPANY:
H3X Technologies is a U.S.-based manufacturer of electric motors for sustainable aviation, marine, industrial, and defense applications. They 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 their products is done in-house at their headquarters in Louisville, Colorado.
H3X’s 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. They take pride in our multidisciplinary approach, relentless dedication, high capital efficiency, and Skunkworks-style execution.
H3X has raised over $18M and has backing from top VC firms and strategic firms including Lockheed Martin, Hanwha, Y Combinator, Cubit Capital, Metaplanet, TechNexus, and Liquid 2 Ventures to deploy capital for rapid scaleup.
H3X is 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.
H3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.
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