NovaTorque's Motor Technology
The unique NovaTorque motor structure is an astoundingly simple and elegant design solution to the problem of how to build a motor with better performance and higher efficiency than conventional motors.
The vast majority of electric motors utilize a radial design.
NovaTorque motors have an axial design, in which the field poles and copper
windings are parallel to the motor’s axis of rotation. The key
innovation of NovaTorque’s axial motor is the use of two cone-shaped hubs
(rotors) onto which the permanent magnets are mounted. Relatively
straight field poles form the flux path between the magnets on each of the
rotor assemblies. 
Even though NovaTorque motors are very different from conventional motors on the inside, they look the same on the outside. They have approximately the same form factor (aspect ratio) as most conventional induction and PM motors, so they can easily replace conventional motors in many applications.
A few of the many advantages of the NovaTorque design include:
- A very simple coil winding, which improves the efficiency and reduces the cost of the motor. This winding also provides for wire size flexibility and the use of foil winds, further improving the motor’s cost advantage.
- No “back iron” needed. Instead, both ends of the field pole are used in the magnetic flux path, which increases the efficiency and reduces the cost of the motor.
- A straight flux path in the field poles allows the use of high-performance grain-oriented steels, which are used in transformers to improve efficiency.
- The conical shape of the rotors allows the motor designer to change the cone angle to increase the air gap area and optimize the magnetic flux density in the field poles. This increases the motor’s torque capability and efficiency.
- Because the copper windings are close to the outside of the motor, heat is dissipated more easily. This improved thermal path allows the motor to run cooler, which improves its output power, efficiency, and reliability.
For more on electric motors in general, click here: Electric Motor Basics
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