Unrivaled power density – 12 kW/kg continuous. The HPDM is the next step in the evolution of electric motor technology.JOIN THE REVOLUTION.
The HPDM-250 is an ultra-high power density integrated motor drive for high performance and mass sensitive applications. It combines the electric motor, inverter, and gearbox into a single unit and is the culmination of H3X innovation in multiple areas including:
High airgap flux density that is 30% higher than equivalent SPM designs utilizing Halbach arrays, >30 kW/kg active motor mass, able to sustain short circuit current indefinitely
Simultaneous cooling of the power electronics and stator with a single additively manufactured aluminum cooling jacket
>40% improvement over conventional windings in terms of maximum continuous current density due to high fill factor (>70%), high thermal conductivity (> 5 W/m-K bulk), and high temperature capability (265 °C for 20,000 hours)
All stator coils are mechanically, thermally, and magnetically decoupled from each other for fault tolerant operation and low total harmonic distortion of line voltages. There are redundant levels of overcurrent and temperature protection in the inverter.
DC link inductance < 4.5nH, switching speeds of 40V/ns and 20A/ns, lightweight high attenuation common-mode EMI filtering
The HPDM-250 is optimized entirely for power density and efficiency. It features the highest level of integration on the market, made possible by our holistic design methodologies rooted in first principles and multidisciplinary expertise in power electronics and electric machines.
H3X has developed a novel stator winding and high voltage insulation system that offers a >40% improvement over conventional windings in terms of maximum continuous current density.
High fill factor (>70%)
Thermally conductive (> 5 W/m-K bulk)
Partial discharge resistant (1800V)
Scalable to higher power MW-class machines
High temperature (265 °C)
The HPDM-30 is a high power density integrated motor drive with a continuous power rating of 33 kW and a mass of only 4.1 kg. The motor utilizes the same core technology as the HPDM-250, combined with a new discrete SiC FET inverter running an in-house developed self-sensing rotor position algorithm.
The HPDM-30 has a peak specific power of > 10 kW/kg and can be used as a motor or generator. The unit can also be stacked axially to form 66kW and 99kW machines.
8 independent HVDC connectors for fault tolerant independent power delivery chains
8 Independent coolant ports for fault tolerant thermal management.
8 Independent Inverter-Stator sectors for unparalleled fault tolerance.
Hollow shaft for variable pitch mechanism and motor stacking - up to 8 HPDM-1500s (12MW)
The EPU is hermetically sealed front to back to reduce risk of FOD and debris
The HPDM-1500 is an ultra-high power density multisector IMD for primary propulsor applications on large electric aircraft and marine vessels. Based on the same core technology as the H3X HPDM-250, this EPU has a continuous specific power of >10 kW/kg and features the highest level of fault tolerance and reliability with its 8 independent drive sectors.
Electromagnetics and power electronics design is near-identical to HPDM-250, where core technology is being de-risked
If a non-recoverable fault occurs in a single sector, the unit can take that one sector offline and continue operating safely
The max shaft speed of 2500 RPM can be used to directly drive the propeller, eliminating the need for a gearbox
Onboard accelerometers and temperature sensors provide life status and predictive maintenance for bearings and high voltage insulation
Our mission at H3X is to develop the most advanced electric motors in the world to enable sustainable aviation and decarbonize the marine and industrial sectors.
For electric aircraft to be commercially feasible, substantial improvements need to be made to electric propulsion system technology. Today, best-in-class motors and inverters have a combined power density of 3-4 kW/kg. ARPA-E has determined that for a Boeing 737 to complete a typical five hour flight, the propulsion system must be >12 kW/kg continuous.
We have the solution.
At 12 kW/kg continuous, the HPDM exceeds ARPA-E’s requirements and is at least 3X better than current systems. It is a step change in electric propulsion technology and removes one of the main barriers blocking widespread commercialization of electric aircraft.
Our products offer the most benefits for propulsion or power generation in any mass-sensitive, packaging-constrained, or high performance applications.
HPDM-30 and HPDM-250 Applications: Drones, hypersonics, undersea ROVs, eVTOL, rockets and space actuators and pumps, small aircraft, specialized ground vehicles
HPDM-1500 Applications: Regional aircraft, ferries, tugs, submarines, industrial equipment, mining and construction, electric locomotives.
H3X brings together driven minds from the automotive, aerospace, and motorsports industries with deep knowledge in electric motors, power electronics, & vehicle engineering. We love what we do and are looking to hire people who share that same passion.
As CEO, Jason is responsible for overall business direction and power electronics development at H3X. His speciality lies at the intersection of business leadership and hardcore engineering. Prior to H3X, he started his own engineering consulting company where he has helped several companies in the automotive and aerospace industries bring their EV product visions to life. He has a B.S. and M.S. in Electrical Engineering from University of Wisconsin-Madison. Fun fact - Jason (and Max) co-founded UW-Madison’s electric Formula SAE team and built the first AWD electric racecar in the United States.
Max is a multidisciplinary engineer with a laser focus on physics fundamentals and deep knowledge in both mechanical and electrical engineering. As CTO, he is responsible for H3X’s overall product engineering, electric motor design, and core technology development. Max’s background includes holding key roles in vehicle modeling, architecture, and electric motor design in both the automotive and aerospace sectors. He has a B.S. in Mechanical Engineering and an M.S. in Electrical Engineering from University of Wisconsin-Madison.
Eric is responsible for all operations and mechanical design at H3X. In Eric’s prior roles, he has lead projects to develop control systems for electric and hybrid powertrain systems from the ground up. He has a B.S. in Mechanical Engineering from University of Wisconsin-Madison. Eric comes from a proud heritage of craftsmen – from butchers and bakers to electricians and steamfitters. This unique background has enabled to him bridge the gap between advanced engineering theory to practical and scalable solutions.
Contact H3X today to see how you can use our products in your vehicles. We are looking to develop long-term relationships with first adopters and partners interested in revolutionizing the aircraft industry and creating a sustainable future.