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. Axial geometries allow some magnetic topologies that would not be practical in a radial geometry. 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 segments narrow towards the centre, leaving less room to arrange windings and connections.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.Uneven flux distribution due to wedge-shaped segments.The rotor is typically much wider, causing increased rotational inertia, and the higher centrifugal forces can reduce the maximum rotational speed.Since the magnetic path through the windings is straight, grain-oriented electrical steel can be easily used, offering higher permeability and lower core losses.Most structural components are flat and can be produced without specialised casting or tooling.Potentially shorter magnetic path length.It is often possible to make the rotor significantly lighter.Since the coils are flat, rectangular copper strips can more easily be used simplifying high-current windings.The coil winding process and the process of joining the coil and core may be simpler.A motor can be built upon any flat structure, such as a PCB, by adding coils and a bearing.Please help improve it by integrating both sides into a more neutral presentation if this helps improve article flow.
#AXIAL FLUX MOTOR MANUFACTURERS PRO#
This includes Lion or other battery power sources.This section contains a pro and con list, which is sometimes inappropriate.
But they will also operate in low voltage (24 Vdc bus) applications. The maximum voltage is limited for safety reasons, at Magnetic Innovations most of our radial flux permanent magnet motors are suitable for handling 3-phase 400 VRMS systems (with a max. The winding of the motor can be selected to fit an available motor drive, but there are limitations. Matching the motor parameters to the drive.It also has to be capable of handling the electric frequency of the motor, which depends on RPM and amount of pole pairs used in the motor. The selected drive should match this Voltage and current under all of the application conditions. The motor requires the correct Voltage and Current ranges to support maximum Speed (voltage) and maximum Torque (current) envisioned for the application. Selecting the drive based upon the parameters of the motor.Which of these approaches makes most sense depends on the required working points (Torque and Speed) of the application. Last but not least: the selection of the right motor drive. This translates into an easier installation and a benefit in cost when it comes to the mechanical construction. The radial flux permanent magnet motor benefits from a far more straightforward construction. The construction of an axial flux motor is complex and involves challenges that are difficult to solve using verified production and construction methods. However the axial flux motor generally uses significantly more permanent magnet material to obtain this higher torque density.Īnother important difference between the axial and radial flux motor is manufacturability and ease of construction.
An axial flux motor generally has a higher torque density than a radial flux motor. A critical difference between the radial and axial flux motor, is the amount of permanent magnet material that is used for a given performance. When the flux is imposed in the axial direction, it is called an axial flux motor. When the flux is imposed in the radial direction the motor is called a radial flux motor. The name ‘radial’ or ‘axial’ originates from the direction in which the permanent magnets impose the magnetic field.
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