This paper describes the electric drive for an in-wheel fractional-slot axial flux machine,designed for achieving a wide flux-weakening operating region.By using a slotted stator with fractional-slot windings and addi...This paper describes the electric drive for an in-wheel fractional-slot axial flux machine,designed for achieving a wide flux-weakening operating region.By using a slotted stator with fractional-slot windings and additional cores enclosing end windings,the axial flux machine reaches a wide constant power speed range.The machine is designed for increasing flux-weakening capability while obtaining low harmonic back-electromotive force and low cogging torque.A 10 N.m axial flux machine exhibiting 3 to 1 flux-weakening speed range has been built.A flux-weakening controller,able to maximize the output torque in the flux-weakening region,is designed and implemented.The goodness of both design and control algorithm is proved by experimental tests.However,such a fractional-slot machine has not only advantages.Rotor losses are very high,and they have to be properly considered during the design process.展开更多
对于参加农业进步展览会的很多设备制造商而言,他们所共用的一项主要新技术就是Tier-4柴油机技术。它有利于降低柴油机的排放和油耗。但是该项新技术有一些新方面需要操作员熟悉。Case IH公司的商业产品培训师 David Stark认为这项新...对于参加农业进步展览会的很多设备制造商而言,他们所共用的一项主要新技术就是Tier-4柴油机技术。它有利于降低柴油机的排放和油耗。但是该项新技术有一些新方面需要操作员熟悉。Case IH公司的商业产品培训师 David Stark认为这项新技术对于大功率拖拉机买家来说是“一项根本性变革”。展开更多
基金financed by the Electric'Drive Laboratory,Department of Electrical Engineering,University of Padova,Padova(haly).
文摘This paper describes the electric drive for an in-wheel fractional-slot axial flux machine,designed for achieving a wide flux-weakening operating region.By using a slotted stator with fractional-slot windings and additional cores enclosing end windings,the axial flux machine reaches a wide constant power speed range.The machine is designed for increasing flux-weakening capability while obtaining low harmonic back-electromotive force and low cogging torque.A 10 N.m axial flux machine exhibiting 3 to 1 flux-weakening speed range has been built.A flux-weakening controller,able to maximize the output torque in the flux-weakening region,is designed and implemented.The goodness of both design and control algorithm is proved by experimental tests.However,such a fractional-slot machine has not only advantages.Rotor losses are very high,and they have to be properly considered during the design process.