PDF Publication Title:
Text from PDF Page: 015
These types of motors are called brushless permanent magnet axial flux synchronous motors. They use permanent magnets arranged in a halbach array to create the magnetic field at the rotating part of the machine (Mike Rissi. 2010). This design allows the motor to be constructed without any ferromagnetic material. In other words, these motors do not need iron to conduct the magnetic field, and this is why they are much lighter than other types of motors with the same performance. Another benefit is the high efficiency that is achieved with this design. The losses that have to do with the iron itself, such as eddy currents and hysteris losses are eliminated. The use of Litz wire in the static part of the motor (stator) also helps minimize the eddy current losses in the copper wire (Mike Rissi. 2010). When comparing the performance metrics of an electric motor and EDF to a modern turbo-fan engine, the differences are not big and an electric powertrain actually wins out overall. Although there might still be an argument to use advanced cooling technologies with super conduction technology if the performance can be increases further by such an approach. For this study, the assumption will be that electric motors have the same power density as the core of a turbo-fan engine. 2.4.2 Power electronics Since the electric motor needs alternating current to operate and batteries can only give direct current, an inverter is needed. This is often referred to as the power electronics module. To achieve a high overall power-to-weight ratio, the inverter needs to be low weight, and as efficient as possible to limit the cooling needs. Current technology has been researched and performance metrics has been gathered, (Unitek, Industry Electronics) and are listed below in Table 5. As can be seen from the performance metrics, the power electronics does not act as a bottleneck in the electric propulsion system. It is actually the least limiting factor. Table 5. Performance metric for the UniTek BAMOCAR-D3-700-400 Performance metric Continuous Electrical Power Peak Electrical Power Weight Power-to-weight ratio, continuous Power-to-weight ratio, peak Electrical efficiency 2.4.3 Scaling effects Value Unit 140 kW 224 kW 8.5 kg 16.5 kW/kg 26.4 kW/kg 97-98 % To be sure that these types of motors could be scaled up to powers in the range of megawatts instead of kilowatts, some knowledge about scaling laws on electric motors must be known. In the literature, there are conflicting arguments about how the scaling laws affect power-to-weight ratio. Some sources seem to indicate that bigger motors tend to have a higher power-to-weight ratio, and also that efficiency tends to be higher in larger motors (E. M. H. Kamerbeek, 1975), (LaunchPoint Technologies). While other claims that because of heat transfer reasons the reverse is true 9PDF Image | Electric Propulsion Passenger Jet Airplanes Requirements to realize all-electric propulsion
PDF Search Title:
Electric Propulsion Passenger Jet Airplanes Requirements to realize all-electric propulsionOriginal File Name Searched:
electric-propulsion-in-passenger-jet-aircraft.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |