Robin Motor Limited

Axial Flux Motor

All motors currently available in the market, be it for automotive, industrial, or a variety of other applications, belong to the category of radial flux motors. These motors, originally invented byThomas Davenport in 1837, form the backbone of motor technology today. However, the concept of axial flux motors was first introduced by the esteemed scientist Michael Faraday back in 1821.The axial flux motor was considered theoretically superior and more ideal compared to its radial counterpart. Nevertheless, due to technological limitations such as gap tolerances between rotor and stator components, compact heat dissipation challenges, rotor deflection issues under load, and the reliance on permanent magnets, the industry leaned towards the more established radial flux motors.Despite attempts by Nikola Tesla and others to explore axial flux motor concepts in the following years, they did not gain traction, and radial flux motors continued to dominate the market.

Axial flux motors provide a range of design advantages over radial flux motors, particularly in the electric vehicle sector. By relocating the motor from the axle to inside the wheel, axial flux motors allow for innovative drivetrain confgurations.

The growing interest in axial flux motors is evident in recent years. These motors, historically utilized in stationary applications like elevators and agricultural machinery, have seen a surge in development efforts to adapt them for electric motorcycles,airport transportation pods, cargo trucks, electric cars, and even aircraft.

While traditional radial flux motors have seen enhancements in weight and cost optimization through the use of permanent magnets or induction technologies, the unique characteristics of axial flux motors offer a promising alternative approach.

Axial flux motors are known for their compactness and shorter axial length compared to radial equivalents, making them particularly suitable for in-wheel motor applications where space is limited. The compact design of axial motors results in higher power and torque densities, reducing the need for excessively high operational speeds.

The superior efficiency of axial flux motors, often exceeding 96%, is attributed to the shorter,more efficient one-dimensional flux path, enabling performance levels comparable to, if not surpassing, the best radial flux motors in the market. The innovative design of axial flux motors, with fewer coil ends and potential for the use of centralized or segmented windings, opens up new possibilities for optimized efficiency and performance.

Cooling Strategery

Multi-layer Mechanism