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Performance Evaluation of APFC with Modulated Triangular Carrier
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| Abstract:An alternative control method for a Boost Active Power Factor Corrector (APFC) operating in Continuous Conduction Mode is presented, analyzed and verified by simulation and experiments. The proposed APFC scheme employs average current control to shape the input current. The power level is adjusted by modulating the amplitude of a triangular carrier as a function of the outer loop error signal. The proposed APFC requires neither line voltage sensing nor input voltage reference circuitry. The theoretical predictions are supported by simulation and experimental results. The experimental results demonstrate some improved performance at low power levels as compared to other methods of APFC without sensing of input voltage. |
| Author: Alexander Abramovitz, Michael Evzelman |
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PDF (Size:3474KB), pp.1-9, Pub. Date: 2013- 03-29,
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162 |
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Parameter Match and Simulation Analysis of a Parallel Hybrid Electric Vehicle
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| Abstract:Design and simulation method for parallel hybrid powertrain used in 4WD vehicle was proposed. Computation models of main components in hybrid powertrain were established and simulated with the help of the modified ADVISOR, in which control strategy was improved to enhance regenerative efficiency. Simulation results were verified by field experiment results of the developed hybrid electric off-road vehicle. Experiment and simulation results show that the developed vehicle is practicable and match of different power sources is vey important to hybrid powertrain. |
| Author: Chen Yong, Zhang Shunjie |
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Full Paper:
PDF (Size:2827KB), pp.10-16, Pub. Date: 2013- 03-29,
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154 |
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The Measurement of Permittivity Tensor of Uniaxial Crystals with Tetragonal and Hexagonal Symmetry at Microwaves
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| Abstract:A nondestructive method for measuring permittivity tensor of uniaxial crystals with tetragonal and hexagonal symmetry in microwave range was proposed. The developed measuring complex was used for testing several dielectrics, inaccuracy of the dielectric permittivity measurements for isotropic dielectrics was less than ?0.5%, for components of dielectric permittivity tensor error didn’t exceed ?1% and for dielectric loss tangent – ?10 %. |
| Author: Alexander V. Strizhachenk |
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Full Paper:
PDF (Size:500KB), pp.17-21, Pub. Date: 2013- 03-29,
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116 |
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Lagrangian Analysis of a Frequency Converter
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| Abstract:This paper presents analysis of an ac–ac Frequency Converter using the method of Lagrange. Differential equation for the output current and its explicit solution in each time segment are derived. The theoretical predictions are validated by simulation and compared to the experimental results. |
| Author: Inna Katz, Michael A. Slonim, Alexander Abramovitz, Svetlana Bronshtein, Yoram Horen |
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Full Paper:
PDF (Size:7380KB), pp.22-29, Pub. Date: 2013- 03-29,
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134 |
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