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Magnetic properties of ferromagnetic materials are important features in power transformer and electrical machine design and manufacture, which should be measured accurately. The measurement data under a small frequency range is given by proposed methods. However, the data at high-frequency needs to be investigated more deeply. A novel 2-D magnetic properties tester for ferromagnetic material specimen...
A two-dimensional (2-D) field-circuit coupled finite element model of induction motor (IM) is built. The equivalent circuit of three-phase squirrel cage rotor is modeled. Based on time-stepping finite elements analysis (T-S FEA), core loss in the stator of a no-load IM under sinusoidal and Sinusoidal Pulse Width Modulation (SPWM) excitations is studied. The rotating flux density distributions with...
Soft ferrite materials are widely used in the construction of high frequency transformer for power electronic applications. Core loss calculation is essential both in the selection of soft ferrites and the design of high frequency transformer. Traditionally, the Steinmetz equation is used to evaluate the core loss of magnetic materials under sinusoidal excitation. Nevertheless, in modern power electronics,...
The rotating magnetic properties of nanocrystalline materials at high frequencies play an important role in design and optimization of high frequency transformers with large capacity and high performance. In this paper, a novel high frequency rotating magnetic properties tester is designed, which is applied to measure the high frequency rotating magnetic properties of nanocrystalline materials. By...
The eddy current effect of laminated steel is significant to the design of high frequency transformer(10 kHz–100 kHz). In this paper, the finite element method considering the micro eddy current is proposed. And, the algorithm is discretized and implemented by Matlab. In order to verify the algorithm, a magnetic ring of nanocrystalline soft magnetic is measured at 50k Hz and 100 kHz. The simulation...
This paper presents a novel three-dimension space vector pulse width modulation (3D-SVPWM) control method for the 3D magnetic property measurement apparatus. Arbitrary 3D magnetic flux density can be obtained by carrier-based PWM technique independently in each axis and vector summation of three axis. The proposed 3D-SVPWM which directly obtains 3D flux density is more efficient and lower harmonic...
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