IEm Mobility Motors

Infinitum Electric is pushing the boundaries of motor technology with a liquid-cooled, smarter air-core motor design that can deliver premium performance for mobility applications. At a fraction of the weight of conventional motors, our IEm motors dramatically improve efficiency and reliability while also offering high-speed, excellent torque, and a modular design. As a result, IEm motors are well suited for drivetrain and propulsion and auxiliary motor applications for Class 1 -8 commercial vehicles as well as aerospace, marine, construction, and agricultural applications.

Download the IEm Series Brochure

Commercial Vehicle and Other Mobility Applications

Propulsion Motors

IEm motors are designed for mobility applications including Class 1 to 8 commercial vehicles, aerospace and marine applications, and heavy machinery. Engineering teams can add power, from 50 to 250 kW, without significantly increasing the size and weight of the drivetrain. Using an axial flux design, IEm motors generate more torque and faster rotation in a smaller package. With our modular disc design, engineers can build multi-stator, multi-rotor motors that offer high power and increased performance. Our innovative design also allows for a highly efficient oil-cooling system that cools the interior stator, helping increase power density by three to five times.

Auxiliary Motors

EVs require up to 50 small electric motors to power infotainment systems, heating and AC, window controls, and even the power steering. This means small, lightweight auxiliary motors are critical for maintaining the efficiency of the vehicle. By etching copper coils directly onto the PCB stator, we eliminate the heavy iron core and copper windings used in conventional motors, cutting motor size and weight in half. This design also makes IEm motors highly reliable and durable. And, by using air-cooling technology rather than noisy fans, IEm motors keep noise low in today’s ultra quiet EVs.

IEm Advantages

Ultra-High Efficiency
IEm air-core motors eliminate stator core losses and eddy current losses in the rotor and magnets are negligible, making IEm motors highly efficient over a wide range of load conditions. Additionally, by using permanent magnets, our motors help offer highly efficient regenerative braking, adding to the overall efficiency of the vehicle as well.

Superior Power Density
IEm motors maximize power density by combining our PCB stator, which weighs 90 percent less than an iron core stator, with high-energy magnets. We further enhance power density by using either air cooling, which allows for two to three times the current density of a conventional motor, or oil cooling, which can triple this. This highly efficient oil cooling unique to our PCB stator enables current densities up to 36,000 A/in².

Modular Axial Design
With our modular axial design, mobility engineers can build multi-stator, multi-rotor motors that are slim and lightweight. This is possible because IEm motors offer higher power and torque density than a comparable radial machine without constantly increasing operating speeds and putting more strain on the motor.

Rapid Prototyping
Mobility engineers need technology that makes it easy to quickly iterate on designs and alter components based on rapidly changing needs. With the modular nature of our IEm motors, engineers inherently have the flexibility to experiment and add stators and rotors quickly and easily to see what configuration will best suit their power and torque needs

Durability and Reliability
Third-party reliability tests have shown our PCB stator is up to 9x more reliable than a conventional copper wire wound stator. This is because our PCB stator design eliminates the common points of failure seen in traditional motors related to the copper windings and insulation. Plus, our ability to more effectively cool the interior of the motor using oil cooling also helps extend the life of our IEm motors.

High Speed
We engineered IEm specifically for high operating speeds, featuring magnet containment that is not in the way of magnetic flux, a coreless construction allowing for high-frequency operation without efficiency penalties caused by core losses, and a simple rotor construction to ensure stability at high speeds.

150 kW Electric Traction Motor Specifications

	150 kW continuous power
	300 kW peak power
	190 Nm continuous torque
	7,500 RPM nominal speed
	10,000 RPM peak speed
	20kg active mass
	95% peak efficiency
	Class 4-6

Reimagining Motors with IEm

Motor development tailored to your specific mobility application needs

To keep pace with the demand for commercial vehicles that are more powerful yet more efficient, the ability to quickly iterate on designs and alter components based on changing needs is critical. This is why we collaborate closely with customers working on these applications, tailoring each IEm Series motor to meet the specific application needs. Our motors use a modular design with the flexibility to add the number of stators and rotors that best suit your power and torque needs. We also provide simple and cost-effective prototyping and production since any local contract PCB manufacturer can produce the motor, avoiding potential supply chain issues.