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The eddy loss of stator windings in synchronous generator was calculated using analysis method and finite-element method, the distributed characteristic of stator windings temperature field was studied. In this paper, the distribution characteristic of eddy current of windings in rectangular slot was analyzed first by using analytical method, and the mathematical representations of eddy current were...
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...
A novel hybrid excitation synchronous generator (HESG) with tangential/radial magnetic path in parallel connection is proposed in this paper. The HESG combines the merits of permanent magnet synchronous generators and electric excitation synchronous generators. The structure characteristics of the HESG are described and the operation principle is introduced. The basic characteristics of the HESG are...
This paper deals with performance analysis of a permanent magnet generator (PMG) considering magnetic losses using d-q axis and equivalent circuit (EC) model based on analytical parameter estimation. Electrical parameters and magnetic power losses are estimated and calculated by analytical methods, respectively. Derived electrical parameters and magnetic losses are employed for the d-q axis and EC...
This paper presents the parameter computation and performance prediction of a permanent magnet (PM) synchronous generator based on numerical magnetic field analyses. The finite element method is employed to accurately determine the magnetic field distribution and key parameters of the machine, such as the winding flux, back electromotive force, winding inductance and core loss. An equivalent electrical...
Hybrid Excitation Synchronous Generator (HESG) is of wide use value generator because of its breaking through of the uncontrolled output voltage bottleneck in PMSG and its getting rid of the dependence of controlled rectifier on operation condition and load category. A new type HESG with Permanent Magnet and excitation field parallel working is developed. Also its structure characteristics and operation...
Jinfeng 62(1.2MW) permanent magnet synchronous generator (PMSG) two dimensional (2D) model constituted according to a pair of magnet pole area. Basic hypothesis and boundary condition presented. Abrupt three-phase short circuit current was calculated, including diversified electromagnetic field and electromagnetic force that exert on PM when generator operates normally and fault happened. The effect...
Permanent magnet synchronous generators (PMSGs) have a bright prospect in the small wind turbine applications. Finite element method (FEM) is a powerful tool to study and design PMSGs, as reported in this paper. First, FEM is employed to study the PMSG's output voltage. Valuable conclusions have been drawn regarding of the PMSG's performance and manufacture cost. Second, a FEM model, which can be...
This paper presents the results of the overheating investigation in three synchronous generators of 71.9 MVA of a hydroelectric power station, that exceed the norm under which were designed, the heating restricts the generation of reactive power. A design verification methodology of salient poles synchronous generators based on the entire verification of the main dimensions of the magnetic circuit...
In this paper, an analytical modeling of an axial flux permanent magnet synchronous generator (AFPMSG) is investigated. The proposed model is based on an exact two dimensional (2D) solution of the magnetic field in the generator. Then, the generator's quantities such as the phase electromotive force (EMF), the cogging torque and electromagnetic torque are written based on the developed exact 2D solution...
This paper focuses on the calculation of the rotor losses of a high speed permanent magnet (PM) synchronous generator. Due to the high rotor speed and high frequency of the stator winding current, the losses of the rotor are no longer negligible. The rotor losses consist of four parts: the air friction loss on the rotor surface, and the losses in the rotor enclosure, PM and rotor core respectively...
This paper presents aspects of the design solution for a high speed, high efficiency permanent magnet machine used as a motor/generator (M/G) unit in a flywheel energy storage system. The motor is operated in a vacuum with passive cooling; thus the right choice of permanent magnet properties and ability to withstand demagnetization due to the temperature variation and armature reaction is important...
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