![]() ![]() High-power, brushless axial motors are more recent, but are beginning to see usage in some electric vehicles. The world’s fastest electric vehicle, Rolls-Royce Plc’s electric aircraft called the Spirit of Innovation, uses three axial flux motors to drive its propeller. Axial motors are typically shorter and wider than an equivalent radial motor.Īxial motors have been commonly used for low-power applications, especially in tightly integrated electronics since the motor can be built directly upon a printed circuit board (PCB), and can use PCB traces as the stator windings. ![]() Building on YASAs IP, Evolito is enabling the aerospace industry to leave behind the legacy radial electric motor. Axial geometries allow some magnetic topologies that would not be practical in a radial geometry. Axial-flux: a revolutionary new approach. Even within the same electrical operating principle, different application and design considerations can make one geometry more suitable than the other. brushed DC, induction, stepper, reluctance) that can be used in a radial motor. The role of axial flux PM brushless machines is increasing especially in applications where integration of motors with other mechanical parts is imperative. Axial Flux Motor Magnet What is axial flux motorThe motor can be divided into axial flux type and radial flux type according to direction of magnetic field. It is shown that an axial-flux permanent-magnet machine with one-rotor-two-stators configuration has generally a weaker efficiency than a radial-flux permanent-magnet machine if for all designs the same electric loading, air-gap flux density and current density have been applied. The rotor shown to the right is magnetized axially with alternating polarity.Īlthough this geometry has been used since the first electromagnetic motors were developed, its usage was rare until the widespread availability of strong permanent magnets and the development of brushless DC motors, which could better exploit this geometry's advantages.Īxial geometry can be applied to almost any operating principle (e.g. A miniature DC brushless axial motor showing the integration with PCB construction techniques. As a result, there is more leverage on the central axis. For axial flux motor, the magnets are placed farther away from the central axis. There are four reasons why Axial Flux motors provide substantially more power while having a lower weight density: Lever. At the inner radius (near the axis of rotation), the surface speed of the rotor is quite low, as is the. An axial flux motor (also known as an axial gap motor, or pancake motor) is a geometry of electric motor construction where the gap between the rotor and stator, and therefore the direction of magnetic flux between the two, is aligned parallel with the axis of rotation, rather than radially as with the concentric cylindrical geometry of the more common radial gap motor. Axial flux motor is considered superior to a radial flux motor. The axial flux design scales somewhat awkwardly. ![]()
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