Different types of permanent magnet generators for wind power application have been subject of research during last two decades. In this thesis different topologies of electrical generators have been investigated for small scale vertical axis wind turbine application. A two stage induction generator is proposed as a alternative solution with respect to the cost of such a system. However, a bigg...

Nowadays, the generation profile of electric energy systems changes with the increasing integration of renewable energy sources. Wind turbines with Doubly-Fed Induction Generators (DFIG) are replacing bulk synchronous generators. The replacement of these synchronous generators will affect power system dynamics in a large extent. Standard controllers for synchronous generators like governors and...

Practical issues in the design of power clock generators needed by adiabatic logic circuits are explained. Synchronous and asynchronous power clock generators are designed for an 8-bit adiabatic carry look-ahead adder and the more energy efficient circuit for the power clock generation is determined to be the 2N synchronous power clock generator that exhibits conversion efficiency of 77% at 1 o...

PS1: Developments of Rotating Electrical Machines A1-101 A novel technique for refurbished induction motors’ efficiency estimation based on no-load tests M. AL-BADRI , P. PILLAY A1-102 Performance of high efficiency induction motors with power quality problems P. DONOLO, C. PEZZANI, A. BONELLI, A. AOKI, R. NEHLS, G. BOSSIO, G. GARCIA A1-103 Optimization of the ventilation system of a hydrogener...

This paper introduces the differential cryptanalysis of additive stream ciphers, and develops its theoretical basis. The relationships between differential and other types of stream cipher analysis are presented. The conservation laws of patterns and of mutual information are derived. The cryptographic significance of pattern distribution of keystream sequences is shown. The cryptographic trans...

This paper represents the performance of a squirrel-cage High Temperature Superconducting Induction/ Synchronous Motor (HTS-ISM) based on nonlinear electrical equivalent circuit. The structure of the HTS-ISM is the same as that of the squirrel-cage type induction machine, and the secondary windings are fabricated by the use of the HTS wires. It has already been shown that based on the experimen...

This paper studies the effect of incipient stator faults in salient-pole synchronous generators and its detection using a simple pattern recognition methodology. A theoretical linear model for the synchronous generator is first developed to provide the relationships between stator and rotor harmonic currents and possible incipient faults on stator electric circuits. All theoretical findings wer...

The mathematical modeling of open-switch faults in two-level machine-side converters and the fault-tolerant current control of isotropic permanent-magnet synchronous generators are discussed. The proposed converter model is generic for any open-switch fault and independent of the operation mode of the electrical machine. The proposed fault-tolerant current control system gives improved control ...