Aura Systems, Inc. (‘Aura’) commercializes the technology for Axial Flux Induction electric motors and generators.
Axial flux motors represent a leap forward in motor technology, offering high efficiency, compact design, and lightweight construction. As industries continue to push for more efficient technologies, the axial flux motor design is a promising solution that combines power, scalability, and superior performance. Its ability to deliver energy savings while minimizing space and weight...
Aura Systems, Inc. (‘Aura’) commercializes the technology for Axial Flux Induction electric motors and generators.
Axial flux motors represent a leap forward in motor technology, offering high efficiency, compact design, and lightweight construction. As industries continue to push for more efficient technologies, the axial flux motor design is a promising solution that combines power, scalability, and superior performance. Its ability to deliver energy savings while minimizing space and weight is likely to propel this motor design into wide use across many sectors, shaping the future of motor-driven systems.
Aura’s axial flux induction motor technology (‘AAFIM’) provides an industrial solution that does not use any permanent magnets, no rare earth elements, is smaller and lighter, uses significantly less materials (just copper and steel), provides very high efficiency, significantly less copper, is highly reliable, and does not require scheduled maintenance.
For Electric Vehicle applications, AAFIM provides efficiencies that are equal to or higher than those provided by the best high energy permanent magnet solution (‘PM’). AAFIM is smaller, has higher reliability, is more robust, has a larger operating speed range, and is not limited to a 100 degrees C operating temperature for the equivalent PM machine.
Aura’s axial flux induction technology, used for mobile power generation, was first utilized in a combat zone by the U.S. forces in the U.N. actions in the Balkans, and since then, the U.S. military has used it in combat zones in both Iraq and Afghanistan. As of February 28, 2025, the company has shipped over 11,000 systems for mobile power applications in the 5-15 kW range, of which over 3,000 systems were for various military applications.
In fiscal 2025, the company completed the design and fabrication of an oil-cooled 250 kW electric motor prototype using axial flux induction and completed the design for a 250-kW air-cooled generator using axial flux induction. In addition, the company filed three new patent applications related to an axial flux induction machine and subassemblies.
The AuraGen/VIPER Product Overview:
Markets Served by the AuraGen/VIPER
Induction Motor Applications
Aura’s axial flux induction machine can be used as either an electric motor or generator. Even a small percent increase in motor efficiency translates to a very large market-wide savings of dollars per year. Since Aura’s axial flux motor designs are more efficient than equivalent radial flux induction motors, the company’s machines use approximately 60% less copper, are approximately one-third the size and weight, and are more efficient than the equivalent traditional radial flux (‘RF’) induction machine.
When compared to radial and axial flux permanent magnet machines, Aura machines are less expensive to manufacture, do not use any rare earths, do not use any permanent magnets, are not dependent on supply from China, are more robust, have a higher operating speed range, have lower maintenance, have a longer lifetime, and are generally smaller, lighter, and higher in efficiency.
Unlike the PM machines, Aura’s axial flux induction machines do not use any permanent magnets, and therefore, the controller can change the B fields since B is proportionate to the voltage divided by the frequency (V/f). Thus, the Aura machine, when operated with a smart inverter, has an advantage over a PM machine. The Aura machine has a smaller volume, equal or better efficiency, and is more reliable.
Mobile and Remote Power Applications
In comparison, the AuraGen system is small and light enough to generally be integrated directly into existing vehicles, does not require maintenance, nor does it require any set-up or tear-down time. In addition, there is no heavy lifting required, and there is no contact with hot surfaces. The AuraGen operation, when integrated into a vehicle or a boat, is completely seamless and transparent to the user.
The market for automotive alternators is presently dominated mainly by four companies: Denso, Valeo, Mitsubishi Electric, and Hitachi Automotive. These companies jointly control nearly 80% of the global market. The compact size and significant increase in efficiency of the AuraGen provide an ideal replacement (fit and form) for high output automotive alternators, while offering higher efficiency, longer lifetime, and the flexibility of multiple types of voltage, both AC and DC. Recently, the company completed the design and development for a 10-kW alternator with a diameter of 10 inches and an axial length of less than 6 inches. The new 10 kW alternator will provide the full 10 kW power at alternator speeds of 2,500-13,000 rpm, with efficiency higher than 90%.
The AuraGen solution increases efficiency over traditional generators, when combined with the company’s load-following architecture and the ability to provide both AC and VDC simultaneously.
Research and Development
The company’s engineering, research, and development costs for Fiscal 2025 were approximately $1.2 million.
Patents and Intellectual Property
The company’s intellectual property portfolio consists of trademarks, proprietary know-how, trade secrets, and patents. Historically, the company has obtained 78 patents in electromagnetic and electro-optical technologies. During fiscal 2025, the company filed three new patent applications covering new winding patterns that can be made to increase current density for increasing torque density and power density, and two patent applications for the development of novel cooling systems, which make better heat dissipation used to reach the highest torque and power density.
Government Regulation
The company is subject to the requirements of the federal Occupational Safety and Health Act, as amended, or OSHA, and comparable state laws that protect and regulate employee health and safety.
Significant Customers
In Fiscal 2025, one significant customer, CBOL, accounted for 55% of revenues.
History
Aura Systems, Inc., a Delaware corporation, was founded in 1987. The company was incorporated in 1987.
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