TY - JOUR
T1 - Impact of Manufacturing Tolerances on Axial Flux Permanent Magnet Machines with Ironless Rotor Core
T2 - A Statistical Approach
AU - Escobar, Andrés
AU - Sánchez, Gonzalo
AU - Jara, Werner
AU - Madariaga, Carlos
AU - Tapia, Juan A.
AU - Riedemann, Javier
AU - Reyes, Eduardo
N1 - Publisher Copyright:
© 2023 by the authors.
PY - 2023/5
Y1 - 2023/5
N2 - Axial Flux Permanent Magnet (AFPM) machines with ironless rotors are an attractive and recently studied solution in low-speed applications, due to their potentially high power/weight ratio, high aspect ratio, and high efficiency. Nevertheless, these machines are prone to be affected by manufacturing tolerance during its fabrication process and consequently, the magnets may move freely inside the rotor structure. This work presents a statistical analysis of manufacturing tolerances of an AFPM machine with an ironless rotor, considering several magnet fault types. A computationally efficient superposition method is developed and implemented to obtain both the cogging torque and rated torque considering several tolerance combinations with acceptable accuracy. The results obtained from a statistical analysis of 10,000 designs of a two-stator one rotor tooth coil winding AFPM (TCW-AFPM) machine allowed us to identify the parameters with the most impact on relevant performance indicators and disclosed a substantial increase in cogging and ripple torque when unavoidable combined tolerances are present.
AB - Axial Flux Permanent Magnet (AFPM) machines with ironless rotors are an attractive and recently studied solution in low-speed applications, due to their potentially high power/weight ratio, high aspect ratio, and high efficiency. Nevertheless, these machines are prone to be affected by manufacturing tolerance during its fabrication process and consequently, the magnets may move freely inside the rotor structure. This work presents a statistical analysis of manufacturing tolerances of an AFPM machine with an ironless rotor, considering several magnet fault types. A computationally efficient superposition method is developed and implemented to obtain both the cogging torque and rated torque considering several tolerance combinations with acceptable accuracy. The results obtained from a statistical analysis of 10,000 designs of a two-stator one rotor tooth coil winding AFPM (TCW-AFPM) machine allowed us to identify the parameters with the most impact on relevant performance indicators and disclosed a substantial increase in cogging and ripple torque when unavoidable combined tolerances are present.
KW - axial-flux permanent magnet machines
KW - cogging torque
KW - manufacturing tolerance
KW - rated torque
KW - superposition method
UR - http://www.scopus.com/inward/record.url?scp=85160511368&partnerID=8YFLogxK
U2 - 10.3390/machines11050535
DO - 10.3390/machines11050535
M3 - Article
AN - SCOPUS:85160511368
SN - 2075-1702
VL - 11
JO - Machines
JF - Machines
IS - 5
M1 - 535
ER -