Multilayer air gap winding designs for electric machines: theory, design, and characterisation

Autor: Wolfgang Heinemann, Norman Borchardt, Kimberly L. Foster, Roland Kasper, Jörg Sauerhering
Rok vydání: 2019
Předmět:
counter-electromotive force
winding layer
torque
Mechanical engineering
finite element analysis
02 engineering and technology
permanent magnet machines
global optimum torque
01 natural sciences
coils
slotless magnetic core
0202 electrical engineering
electronic engineering
information engineering
air gap height
four-layer winding design
torque-to-mass ratio
magnetic circuits
010302 applied physics
magnetic cores
machine torque
General Engineering
novel single layer air gap winding
Magnetic flux
rotors
Magnetic circuit
Air gap (plumbing)
existing validated machine design
optimal torque output
electric machines
Materials science
fixed ohmic power loss boundary condition
Energy Engineering and Power Technology
ohmic power losses
additional layer
16-fold increase
single-layer winding design
Counter-electromotive force
magnetic circuit design
torque control
torque ripple
multilayer air gap
air gaps
electric potential
magnetic poles
0103 physical sciences
Torque
Torque ripple
machine current
magnetic flux
meandering structure
machine windings
meandering geometry
020208 electrical & electronic engineering
Magnetic core
lcsh:TA1-2040
torque-to-weight ratio
phase self-inductance
fourfold increase
single layer design
Electric potential
lcsh:Engineering (General). Civil engineering (General)
permanent magnet motors
useable magnetic flux density
Software
multilayer design
Zdroj: The Journal of Engineering (2019)
ISSN: 2051-3305
DOI: 10.1049/joe.2018.8071
Popis: Here, the authors present a magnetic circuit design with a multilayer air gap winding. This design provides a new degree of freedom in the design process. The approach is based on a single layer air gap winding, which demonstrates the ability to scale, permitting application in small and large electric machines. A meandering structure with coils arranged parallel to the rotation axis are mounted in several layers on a slotless magnetic core. The authors consider a fixed ohmic power loss boundary condition to compare this approach with an existing validated machine design. Machine current is reduced with each winding layer, while self-inductance and induced voltage are increased. Since the air gap height is increased with every additional layer, the useable magnetic flux density decreases. Accordingly, an utilisable range in which optimal torque output is obtained can be described analytically. The authors provide comparison between a single-layer winding design, which achieves the global optimum torque, and a four-layer winding design, which gives a 16-fold increase in the phase self-inductance. Additional thermal simulations prove that the multilayer design give the same ohmic power losses as the single layer design, without having any thermal issues and hot spots.
Databáze: OpenAIRE
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