Topology Comparison of Superconducting AC Machines for Hybrid Electric Aircraft

Stability Analysis and Control Design for Hybrid Ac-dc More- Electric Aircraft Power Systems

Voltage control of switched reluctance machines for Hybrid Electric Vehicles

The rugged low-cost construction and constant power profile of a switched reluctance motor (SRM) make it suitable for hybrid electric vehicles (HEVs). This paper describes the development of a voltage-based control strategy for a SRM. The controller design is influenced by project constraints and goals as well as the use of a new power topology. A prototype SRM and controller were built and ful...

Topology optimization of electric machines based on topological sensitivity analysis

Topological sensitivities are a very useful tool for determining optimal designs. The topological derivative of a domain-dependent functional represents the sensitivity with respect to the insertion of an infinitesimally small hole. In the gradient-based ON/OFF method, proposed by M. Ohtake, Y. Okamoto and N. Takahashi in 2005, sensitivities of the functional with respect to a local variation o...

Harmonic Elimination of 25 kV AC Electric Railways Utilizing a New Hybrid Filter Structure

Thyristor rectifiers are widely used in electric railways in order to control the speed. As a consequence of their usage in addition to substantial input lead current, an enormous amount of harmonics is injected into the grid. To avoid such harmonics as well as reactive power compensation, reactive power hybrid filters consisting of active and passive filters are utilized. Regarding different p...

Topology Generation for Hybrid Electric Vehicle Architecture Design

Existing hybrid powertrain architectures, i.e., the connections from engine and motors to the vehicle output shaft, are designed for particular vehicle applications, e.g., passenger cars or city buses, to achieve good fuel economy. For effective electrification of new applications (e.g., heavy-duty trucks or racing cars), new architectures may need to be identified to accommodate the particular...