Sökning: "electric machines"

Visar resultat 16 - 20 av 76 avhandlingar innehållade orden electric machines.

1. 16. On design and analysis of synchronous permanent magnet machines for field-weakening operation in hybrid electric vehicles

   Författare :Freddy Magnussen; Chandur Sadarangani; Barrie Mecrow; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Applied mechanics; permanent magnet machines; field-weakening; hybrid electric vehicles; soft magnetic composites; fractional pitch concentrated windings; Teknisk mekanik; Engineering mechanics; Teknisk mekanik;

   Sammanfattning : A regular vehicle of today is equipped with an internal combustion engine that runs on either gasoline or diesel, which are fossil fuels from oil reserves that are millions of years old. In all types of combustion processes carbon dioxide and several other emissions are produced. LÄS MER

3. 17. Synchronous Machines with High-Frequency Brushless Excitation for Vehicle Applications

   Författare :Junfei Tang; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrically Excited Synchronous Machines; Machine Modeling; Brushless Excitation; Machine Control; Machine Design; Electric Vehicles;

   Sammanfattning : Electrically excited synchronous machines (EESM) are becoming an alternative to permanent magnet synchronous machines (PMSM) in electric vehicle (EV) applications. This mainly attributes to the zero usage of rare-earth material as well as the capabilities of high starting torque and good field weakening provided by EESM. LÄS MER

4. 18. Predictive Control of Hybrid Electric Vehicles on Prescribed Routes

   Författare :Lars Johannesson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Management; Powertrain Control; Predictive Control; Dynamic Programming; Vehicle Telematics; Hybrid Electric Vehicle; Hybrid Electric Powertrains;

   Sammanfattning : At the highest level in the powertrain control system in a hybrid electric vehicle an energy management controller interprets the driver’s pedal actions as a torque that is to be delivered at the powertrain output. The energy management controller distributes this torque between the engine and the electric machines and decides when to change gear and when to turn off the engine for pure electric propulsion. LÄS MER

5. 19. Design, Modelling and Verification of Distributed Electric Drivetrain

   Författare :Nimananda Sharma; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electric vehicles; system modelling; mechanical-hardware-in-the-loop; real-time modelling; power-hardware-in-the-loop; Distributed drivetrain;

   Sammanfattning : The electric drivetrain in a battery electric vehicle (BEVs) consists of an electric machine, an inverter, and a transmission. The drivetrain topology of available BEVs, e.g., Nissan Leaf, is centralized with a single electric drivetrain used to propel the vehicle. LÄS MER

7. 20. Electric machine control for energy efficient electric drive systems

   Författare :Andreas Andersson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; permanent magnet synchronous machine PMSM ; noise assessment; Energy efficiency; modulation techniques;

   Sammanfattning : Pure electric vehicles and hybrid electric vehicles are of increasing interest in the automotive industry, much due to challenges such as emission level legislations and the environmental impact of the transportation sector. When continuously striving for better performing and more energy efficient electric powertrains, with high drivability and redundancy, there is an ever increasing need for further research and development in the areas of controls, design and system level optimization. LÄS MER