Design optimisation of ironless motors based on magnet selection

This paper considers the design of a radial flux permanent magnet iron less core brushless DC motor for use in an electric wheel drive with an integrated epicyclic gear reduction. The motor has been designed for a continuous output torque of 30 Nm and peak rating of 60 Nm with a maximum operating speed of 7000 RPM. In the design of brushless DC motors with a toothed iron stator the peak air-gap magnetic flux density is typically chosen to be close to that of the remanence value of the magnets used. This paper demonstrates that for an ironless motor the optimal peak air-gap flux density is closer to the maximum energy product of the magnets used. The use of a radial flux topology allows for high frequency operation and can be shown to give high specific power output while maintaining a relatively low magnet mass. Two-dimensional finite element analysis is used to predict the air-gap flux density. The motor design is based around commonly available NdFeB bar magnet size

Design optimisation of ironless motors based on magnet selection

This paper considers the design of a radial flux permanent magnet ironless core brushless DC motor for use in an electric wheel drive with an integrated epicyclic gear reduction. The motor has been designed for a continuous output torque of 30 Nm and peak rating of 60 Nm with a maximum operating speed of 7000 RPM. In the design of brushless DC motors with a toothed iron stator the peak air-gap magnetic flux density is typically chosen to be close to that of the remanence value of the magnets used. This paper demonstrates that for an ironless motor the optimal peak air-gap flux density is closer to the maximum energy product of the magnets used. The use of a radial flux topology allows for high frequency operation and can be shown to give high specific power output while maintaining a relatively low magnet mass. Two-dimensional finite element analysis is used to predict the airgap flux density. The motor design is based around commonly available NdFeB bar magnet size

Estrategias Digitales Para Los Negocios

Este trabajo es para fines institucionales de la Universidad del Rosario. A lo largo del segundo semestre del año 2016 entendimos la importancia de los medios digitales para las empresas, por lo cual el profesor Juan Manuel Méndez nos dio el caso de las bicicletas de Nairo Quintana con el cual teníamos que desarrollar un plan de estrategias digitales acorde con el contexto actual del sector de las bicicletas, en donde se creara y desarrollara la marca de la agencia digital creada por los estudiantes, describir el producto innovador, desarrollar nuestros objetivos en los medios digitales, identificar y definir nuestro mercado objetivo (Target), crear todo un flow de medios con cronogramas, fechas y porcentaje de inversión en cada medio y por ultimo identificar los KPI´s de nuestra campaña propuesta según los objetivos planteados.

Brake system performance requirements of a lightweight electric/hybrid rear wheel drive vehicle

Investigates the braking performance requirements of the UltraCommuter, a lightweight series hybrid electric vehicle currently under development at the University of Queensland. With a predicted vehicle mass of 600 kg and two in-wheel motors each capable of 500 Nm of peak torque, decelerations up to 0.46 g are theoretically possible using purely regenerative braking. With 99% of braking demands less than 0.35 g, essentially all braking can be regenerative. The wheel motors have sufficient peak torque capability to lock the rear wheels in combination with front axle braking, eliminating the need for friction braking at the rear. Emergency braking levels approaching 1 g are achieved by supplementation with front disk brakes. This paper presents equations describing the peak front and rear axle braking forces which occur under straight line braking, including gradients. Conventionally, to guarantee stability, mechanical front/rear proportioning of braking effort ensures that the front axle locks first. In this application, all braking is initially regenerative at the rear, and an adaptive ''by-wire'' proportioning system presented ensures this stability requirement is still satisfied. Front wheel drive and all wheel drive systems are also discussed. Finally, peak and continuous performance measures, not commonly provided for friction brakes, are derived for the UltraCommuter's motor capability and range of operation.

Electric Vehicles - a well to wheel analysis

The European Union has set a target for 10% renewable energy in transport by 2020, which will be met using both biofuels and electric vehicles. In the case of biofuels, for the purposes of meeting the target, the biofuel must achieve greenhouse gas savings of 35% relative to the fossil fuel replaced. For biofuels, greenhouse gas savings can be calculated using life cycle analysis, or the European Union default values. In contrast, all electricity used in transport is considered to be the same, regardless of the source or the type of electric vehicle. However, the choice of the electric vehicle and electricity source will have a major impact on the greenhouse gas savings. This paper examines different electric-vehicle scenarios in terms of greenhouse gas savings, using a well-to-wheel life cycle analysis.

A well-to-wheel analysis of electric vehicles in the all-island Single Electricity Market

The European Union has set a target for 10% renewable energy in transport by 2020 to be met using biofuels and electric vehicles. In the case of biofuels, the biofuel must achieve greenhouse gas savings of 35% relative to the fossil fuel replaced. For biofuels, greenhouse gas savings can be calculated using life cycle analysis or the European Union default values. In contrast, all electricity used in transport is considered to be the same, regardless of the source or the type of electric vehicle. However, the choice of the electric vehicle and electricity source will have a major impact on the greenhouse gas saving. In this paper the initial findings of a well-to-wheel analysis of electric vehicle deployment in Northern Ireland are presented. The key finding indicates that electric vehicles require least amount of energy per mile on a well-to-wheel basis, consume the fewest resources, even accommodating inefficient fuel production, in comparison to standard internal combustion engine and hybrid vehicles.

Operator's manual : screening unit, aggregate, electric driven, wheel mounted, with dolly with 4 dual tires, 75 ton per hour capacity, Barber-Greene model 410-3G ....

"March 1962."

Organizational, DS, GS, and depot maintenance manual including repair parts : welding machine, arc, generator, electric motor driven, 300-amp DC arc, 220/440-V, 60-cycle, 3-phase, wheel mounted (Harnischfeger model W300 MG), FSN 3431-226-1569).

"April 1965."

Direct and general support and depot maintenance repair parts and special tools list : welding machine, arc, generator, electric motor driven, AC, 220V, 3 phrase [i.e. phase], 60HZ, single operator, remote control, 300 amp DC arc, wheel MTD ....

"December 1968."

Organizational maintenance repair parts and special tools lists : crusher, roll, diesel and electric driven, wheel mounted, pneumatic tires, 75 ton per hour, NSN 3820-00-788-5999, Eagle crusher model 5230B, NSN 3820-00-876-7876, Eagle crusher model 5230C and model 5230D, component of crushing and screening plant, diesel and electric driven, wheel mounted, 75 ton per hour.

Includes index.

Direct support and general support maintenance repair parts and special tools lists (including depot maintenance repair parts and special tools lists) : crusher, roll, diesel and electric driven, wheel mounted, pneumatic tires, 75 ton per hour, NSN 3820-00-788-5999, Eagle crusher model 5230B, NSN 3820-00-876-7876, Eagle crusher model 5230C and model 5230D, component ...

Includes index.

Direct support and general support maintenance repair parts and special tools lists (including depot maintenance repair parts and special tools lists) : crusher, jaw, diesel and electric driven, wheel mounted, pneumatic tires, 75 ton per hour, Eagle crusher models, model 5157, serial numbers 2050 thru 2087, model 5157A, serial numbers 2090 thru 2174 ...

Includes index.

Organizational maintenance manual : crusher, jaw, diesel and electric driven, wheel mounted, pneumatic tires, 75 ton per hour (Eagle crusher model 5157), FSN 3820-783-7311, component of crushing and screening plant, diesel and electric driven, wheel mounted, 75 ton per hour.

"February 1964."

Operator's manual : crusher, roll, diesel and electric driven, wheel mounted, pneumatic tires, 75 ton per hour (Eagle crusher model 5230B) FSN 3820-788-5999, component of crushing and screening plant, diesel and electric driven, wheel mounted, 75 ton per hour.

Includes index.

Operator's manual : crusher, jaw, diesel and electric driven; wheel mounted pneumatic tires; 75 ton per hour (Eagle crusher model 5157) FSN 3820-783-7311, component of crushing and screening plant; diesel and electric driven; wheel mounted; 75 ton per hour.

Includes index.