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The use of a series-connected self-excited synchronous generator for isolated distributed generation is investigated. Such a machine may be realized by connecting the stator and rotor windings of a slip-ring induction machine in series, but with reversed phase sequence. The advantage of the machine configuration is high power density and high-speed operation. Both phasor diagram and time-stepping...
This paper presents an FEM analysis for computing the performance of a double-sided axial flux permanent magnet synchronous generator (AFPMSG). The AFPMSG has 16 poles on each rotor and a compact disk armature winding with 12 coils and without iron core. The accurate field distribution and load performance are computed for a prototype machine.
The steady-state and transient performance of a surface-inset permanent-magnet synchronous generator (PMSG) feeding an isolated load is studied using a coupled-circuit, time-stepping, two-dimensional finite-element analysis. Nonlinearities in the field and electric circuit are taken into consideration and both passive ac load and bridge rectifier dc load operating conditions are analyzed. The main...
A novel wind energy system is proposed and studied in this paper. An axial-flux permanent-magnet synchronous generator (AFPMSG) is directly coupled to a vertical-axis wind turbine (VAWT), which can be an H-Darrieus, Savonius, Hunt turbine, or others. The AFPMSG has an outer-rotor construction for convenient mounting to the turbine rotor structure. The coreless armature winding design eliminates cogging...
The performance analysis of a permanent-magnet synchronous generator with surface-inset rotor feeding a rectifier load is described. The time-stepping, coupled-circuit, two-dimensional finite-element method enables the instantaneous values of field and circuit variables to be solved simultaneously. Useful generator information, such as the air gap flux distribution, voltage and current waveforms,...
The no-load and armature reaction magnetic field distributions of a single-sided axial-flux permanent-magnet synchronous generator (AFPMSG) without armature core are determined by analytical solution of the field equations, using a Fourier series approach. The method is computationally efficient and enables the harmonics and field form of the AFPMSG to be evaluated quickly. A finite element analysis...
A review of permanent-magnet machines for distributed power generation is presented. Radial-flux, linear and axial-flux machine configurations are discussed with reference to generation that utilize energy resources such as wind, wave energy, and natural gas. Isolated operation and grid-connected operation are considered. Some of the authors' research work on a surface-inset permanent-magnet synchronous...
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