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The current confluence of energy needs, enhanced environmental awareness and technical developments has led vigorous global efforts toward making wind power a key component of renewable and sustainable energy resources. The conventional wind generators are induction machine types having small and limited wind power production and high cost per unit. Large wind plants involving interior permanent magnet...
Hybrid excitation synchronous machine(HESM) combines the characteristics of permanent magnet machine and wound field synchronous machine. A novel coordinate structure HESM is proposed and implemented in this paper. The architecture and operation principle of the novel HESM are presented. To predict the electromagnetic performance more accurately, 3D-FEA model of the HESM is built, and finite-element...
To solve the low efficiency of electric excitation claw-pole synchronous generator (EECSG) and the challenges to regulate the magnetic field of permanent magnet (PM) claw-pole synchronous generator, a novel hybrid excitation claw-pole synchronous generator (HCPSG) with magnetic circuit series connection was proposed in this paper. Through the simulative study to the generator using the calculation...
Study on dual-rotor generator technology can promote the wind power industry since it has compact structure and higher performances. This paper proposes a novel dual-rotor permanent-magnet synchronous wind-driven generator which can apparently improve the utilization coefficient of wind energy, and then introduces its operation principle, structure and design. After that, the magnetic field of the...
The 2-D transient field model of Interior permanent magnet generator (IPMG) which is driven by wind turbine is set up and analyzed by the software of Ansoft. As a result, with the size of top rake of magnetic pole changing, the variation of starting resistant moment is obtained. Consequently, theoretic reference for minimization of starting resistant moment of IPMG is offered.
This paper re-examines some of the usual assumptions in deploying synchronous machines in multi-megawatt, high-speed applications. A viable design is presented with a focus on rotor capability and cooling system performance that can operate at common gas turbine speeds and power ratings. The models used in the analysis are validated with a similar topology machine, albeit a higher speed and lower...
Generator rotor and stator vibration characteristics on stator winding inter-turn short circuit fault are analyzed. Through calculating the generator parameters of air-gap magnetomotive force, air-gap magnetic field energy and magnetic flux density on the fault, the frequency characteristic of imbalance magnetic pull acting on rotor and that of pulsating magnetic pull acting on stator core are found...
This paper describes a method to improve the performance of autonomous electrical machine generators by increasing their power indexes. This method involves slot optimization based on the visualization of the magnetic flux pattern to allow the reduction of the slot leakage and to keep the slot's cross-sectional area and flux density constant in the teeth and yoke. Results show that the decrease in...
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