Unlike in a radial flux machine, where the stator consists (in most cases) of a stack of electrical steel laminates, Lamperth says the stator in an axial flux machine – while still made from laminates – takes a different form. “It keeps lead times down and helps control costs if you can work from a selection of standard parts,” says Lamperth.īeing a central-rotor axial flux machine, the PHI301 has two stators, which sandwich the rotor, the stators being indirectly cooled. That fundamental flexibility is important because it allows customer applications to be catered for without having to develop new designs from scratch. “Sometimes, adaptation will simply involve producing a different housing for a new application other times, such as with a hybrid system, we use the PHI301 rotor with a different stator.” “We use this motor in automotive, UAV, motorbike and hybrid vehicle systems,” he says. Lamperth notes that there are subvariations of the basic motor design available, which are tailored to different applications. It has a maximum operating speed of 9000 rpm, with a power output of 160 kW (nominal 85 kW) and a torque output of 520 Nm/384 lb-ft (nominal 190 Nm), for a package weight of 29 kg. The PHI301 is a central-rotor, surface-mounted, permanent magnet, axial flux machine, and is one of a family of Phi-Power motors that share this topology. The PHI301 motor shown on these pages was developed to be suitable for a wide range of applications and is in fact used in the Johnston Sweepers EVIE street sweeper detailed on page 48. One proponent of axial flux technology is Dr Michael Lamperth, founder of Swiss company Phi-Power, which produces a range of axial flux motors that have seen use in vehicles ranging from off-highway earth-movers to motorcycles. One of the main stumbling blocks for axial flux machines has been the high cost of producing the rotor and stator components, but developments in manufacturing technology have gone a long way to negating that. It is a topology which in recent years has seen increased adoption in many e-mobility applications, with the arrival of a number of companies producing motors that fulfil both traction and auxiliary drive functions.Īxial flux machines are by no means a new invention, in fact some of the first electric motor designs were axial flux units, but for various reasons they failed to see widespread adoption in the same way as radial flux machines. Something of the new kid on the block in the world of electric machines is the axial flux motor. Lawrence Butcher investigates the technology and engineering behind this compact but powerful motor design. Send the moderators a message and we'll unblock it as soon as possible.Axial flux motors have seen increasing adoption across the e-mobility industry If you can't find your submission it was probably caught by Reddit's spam filter. Submit your favorites here! Related subreddits The Scientist and Engineer's Guide to Digital Signal Processing.If you find a post violating one of these rules please report it so the mods can review it ASAP. Posts related to education that are not specifically EE should be taken to /r/EngineeringStudents. Posts about building electrical (residential or industrial) as well as electrical grid systems should be taken to /r/electricians. r/gadgets is a better place for non-engineering problems. No tech support questions on consumer products, unless it is truly an engineering problem. Generic "Please solve this problem" posts will be removed.ĥ.No Consumer Product Tech Support Questions If you'd like help with an assignment, feel free to post the question along with your progress so far and specific questions that you have. However, if we see off topic, an influx and/or multiple posts (more than one a day) from a single user, they will be removed at the moderators discretion. Some exceptions can me made for personal websites and blogs for things such as scholarly research papers and reports.Ī sprinkle of funny posts help keep the sub from becoming stale. No advertising of products, services or personal websites/blogs. Intelligently explain why they are wrong, don't just say they're an "idiot". Welcome to /r/ElectricalEngineering! A place to ask questions, discuss topics and share projects related to Electrical Engineering.
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