Speed regulation performance of slotted-type axial-flux magnetic couplers under temperature influence
In order to solve the speed regulation problem of the axial-flux magnetic coupler affected by temperature,a slotted-type magnetic coupler with 6 pairs of poles and 16 slots was taken as the research object.Based on the axial media of the magnetic coupler and the structure of the conductor disk yoke with alternating arrangement of iron and copper conductors,using the vector magnetic potential method,combined with the Carter coefficient of correcting the three-dimensional end effect,taking the influence of temperature on the remanence of permanent magnets into consideration,the whole electromagnetic torque formula was derived.Then,the analytical models of speed regulation relationship under constant torque load,quadratic rate load and constant power load were established respectively.By using finite element simulation,the speed range and characteristics of the slotted-type magnetic coupler under different tem-perature and air gap were determined under three different load conditions.Finally,a test platform was built for speed regulation performance test,and the theoretical,simulation and experimental values of e-lectromagnetic torque and output speed of magnetic coupler under different load conditions were com-pared.It is found that the theoretical model has high accuracy,and these studies provide a theoretical basis for intelligent control of slotted magnetic coupler in speed control system.
axial-flux magnetic couplerslotted-typevector magnetic potentialinfluence of temperature riseelectromagnetic torquespeed regulation performance
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