Research on Permanent Magnet Constant Voltage Device for Vehicle
Firstly, the improved quadratic regression orthogonal design method is proposed. Secondly, the indoor physical experiment is carried out on the main affecting factors for the permanent magnet constant voltage device for vehicle application, and meanwhile, the corresponding output voltage and current mathematical model is established by means of the statistical analysis, mathematical model establishment. Finally, the influence mechanism of the different speed and frequency on the output voltage and current is analyzed. This research can provide an important basis for study of the permanent magnet constant voltage device.
Optimization of Starter Motor for Automobile Applications
Normally, both brushed dc Motor and brushless dc motor are used as a starter motor in the automobile application. This paper presents the optimization methodology for brushed PM dc motors. In this brushed dc motor will be a four pole twenty-five slots based machine. This model analysis involves the more number of analytical calculations and computation for the selection of the best model, performance and excellent material characteristics. This method is considered with the existing commercial dc motors to meet the same performance after reduction of weight with change of some parameters; for cranes to lift the loads, various trucks, drill hand tool and automotive application likes car, bike. Optimised DC machine designs using Ferrite permanent magnets are proposed and provide important size and weight reductions without losing of its performance. The finalized model and the  existing model was solved using the MAGNET Software by FEA (Finite Element Analysis) to see the basic performance such as flux density, speed, torque, output power of the existing model.
Losses minimization in a variable speed field-oriented controlled induction generator
A strategy to control an induction generator (IG), working with variable speed and load, is presented and discussed in this work. The objective of the proposed system is to make it work as a stand alone (not grid connected) generator to produce electrical DC energy, charging a battery bank and/or feeding DC loads with maximum efficiency. An inverter and a field-oriented controller are used to excite efficiently (minimizing system losses) the IM, regulating the generated voltage and rectifying the AC current. A laboratory set up was mounted to experimentally validate the proposal. This prototype is based on a conventional 4 kW squirrel cage IM. Simulation and experimental results were carried out to validate this proposal.