![]() Imagine having to stamp out a series of differing shapes and assemble them to form the body and caps – a manufacturing nightmare! Using laminations in a yokeless design can be very expensive.Laminations don’t allow a 3d shape or 3d flux path.So the question is, can you make a yokeless axial flux motor with laminations? The answer is technically yes – but is it really worth it? You could eliminate the bobbins and wind directly onto the stator tube to achieve a higher winding density and eliminate the potential air gap effect of the bobbin.Yokeless axial flux motors may also have other advantages, such as: In refrigerators and other household applications, such as HVAC units, a yokeless motor would use less energy, leading to lower electric bills.Hand Tools made with yokeless axial flux motors would be more lightweight than their current radial flux design, creating a hand tool that can be held without fatigue.The reduced weight in an electric car motor would allow for further distances without charging.In a drone, higher torque density means reduced weight in your motor, which means higher potential payload of the carried goods.The design of a yokeless axial flux motor allows for higher torque density, with reduced weight, space volume, and electric consumption. ![]() If you follow electric motor trends, you’ve probably heard a lot from YASA and Magnax about yokeless axial flux motors. Why Choose Yokeless over Regular Axial Flux Motors? Advantages of this design are the ability to have the flux interact with the two sets of magnets, thus significantly increasing the power density of the design – meaning less weight, less current, less losses, and more power. In a yokeless axial flux motor, the flux jumps from the stator tooth to the magnets and back to the next stator tooth. Magnets are then placed on the top and/or bottom of a rotor which interacts with the flux created by each individual segment. In a yokeless axial flux motor, the stator is made of individual stator teeth that are not connected to any back iron. ![]() Due to the absence of a yoke, the stator teeth need to be connected together in an alternative way. ![]() The flux goes up one tooth, down the other, and through the yoke.Īs the name implies, a yokeless axial flux motor doesn’t have a stator yoke. It has a greater use of the copper windings and no end-turns, which leads to an increase in the number of turns and decrease in heat generation.Īs you can see below, the yoke connects all the stator teeth together. In an axial flux motor, the gap between the rotor and stator – or the flux between the two – is parallel to the axis of rotation. What Is the Difference Between Axial Flux & Yokeless Axial Flux Motors? Now, we’d like to introduce the advantages of yokeless axial flux motors and how pairing them with SMCs can bring your electric motor design to a whole new level. We’ve discussed the advantages of axial flux motors over other types of motors in detail, particularly in relation to the benefits soft magnetic composites (SMCs) have over traditional materials, such as laminations. ![]()
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