Efficient thermal management of coaxial magnetic gears with pulsating heat pipe and forced air cooling
ZHOU Yufeng
LUO Shuai
CHEN Hang
HAO Xiuhong
Abstract：[Objective]The field modulated magnetic gear(FMMG)with the coaxial structure has a higher transmission capacity,which can be comparable with mechanical gears.While,the coaxial structure with the narrow and long air gap makes FMMG face the problem of heat dissipation.High temperature is easy to cause the performance degradation of the permanent magnets,or even demagnetization,and transmission failure.In view of the seriousness of the problem,a combined heat dissipation based on the pulsating heat pipe(PHP)and forced air cooling was proposed.[Methods]The PHP working process from start-up to dynamic equilibrium cycle based on the fluid-solid coupling simulation was analyzed.Influence of the liquid filling rate and other parameters on the equivalent thermal conductivity was discussed.The temperature field distributions of the FMMG under the different heat dissipation modes were analyzed.[Results]The finite element analyses and test results show that there are specific shortcomings for single PHP heat dissipation and single forced air cooling heat dissipation in FMMG,and the combined cooling method with both PHP and forced air cooling can dissipate heat more efficiently.This technology can provide support for the realization of high-power density FMMGs.
Keywords：Magnetic gearField modulationPulsating heat pipeForced air coolingCombined heat dissipation
Publication Date：2025-04-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 117-125,138 )