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In this paper, it was performed to optimize design of LSM for starting and operating characteristics improvement. Cogging torque and back-EMF were calculated by the no-load analysis, start-up time is calculated. Also, efficiency and torque ripple were calculated by steady state analysis. The characteristics of the motor were calculated through FEM. Validity of this study was proven through comparison...
This paper presents the analysis of a 9/10 poles BLDC machine during steady state and start-up operation. Due to the asymmetrical construction the coupling between Flux 2D and Simulink is used to analyze the start-up operation.
The paper presents a mathematical model of brushless DC machine induced by permanent magnets. Its construction uses the classical model of permanent magnet synchronous machine and induced model of power inverter using the serraphil form. The results of the computer simulation were presented for such states: startup, work under active constant load and the behavior of the machine in terms of exponential...
This paper deals with the modeling, the design, and the construction of a new concept slip-synchronous permanent-magnet (PM) wind generator for direct-drive direct grid connection. This generator is a variation of the conventional PM induction generator concept as proposed and analyzed in literature. The use of nonoverlap windings is proposed for the first time for this type of generator. Combined...
The phasor diagram of the hybrid rotor machine is given in dq frame, according to the phasor diagram, the voltage equations are obtained. Compared the ALA rotor machine, the SPM rotor machine with the hybrid rotor machine starting performances by solving their state-steady equations, results show that the starting performances of the hybrid rotor machine are better than the pure ALA rotor machine,...
The brushless DC generator controlled by a predictive algorithm is considered in this paper. It is able to develop excellent performances such as minimum Joule losses and minimum torque ripple, at the same time. The tracking characteristic of the prime-mover is mandatory for setting the reference value of the electromagnetic torque developed by the generator, by means of which the switching pattern...
Line Start Permanent Magnet Synchronous Motor (LSPMSM) has been proved as an economically feasible, high efficiency alternative to an induction motor where constant speed is desirable. These motors are having the properties of an induction motor during starting and synchronous motor during steady state period. The need of line starting, calls for a cage winding in addition to permanent magnets in...
To study the performance of line start permanent magnet motors, this paper investigates two typical rotor designs which have different magnet arrangements, including the interior-magnet rotor and the surface-magnet rotor. The transient and steady states of these motors are calculated by using two-dimensional finite-element analysis. Characteristics such as flux distribution, efficiency, and loading...
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