Volume 16, Issue 1 (March 2020)  

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Abstract (1658 Views) | Full-Text (PDF) (803 Downloads)   |   Highlights
  • High voltage conversion ratio with high efficiency 
  • Lower peak voltage through the semiconductors can be achieved by selecting an appropriate value of the turn’s ratio of the coupled inductor 
  • Less number of active and passive elements such as inductors and semiconductors. 
  • Low size, volume, and cost.

Abstract (1124 Views) | Full-Text (PDF) (537 Downloads)   |   Highlights
  • Performing module-level MPPT in partial shading conditions with no need for DC-DC converter in an AC-module architecture.
  • Proposing a hybrid switching technique to reduce switching power losses reduction and minimize THD of the output waveform.

Abstract (1215 Views) | Full-Text (PDF) (553 Downloads)   |   Highlights
  • A new method of field weakening control for the axial flux-switching permanent-magnet motor is proposed.
  • This method can make the motor run in the deep weak magnetic field, so that the motor can run at a higher speed.
  • Linearized the MTPV curve, and simplified the calculation are the specific feature of this method.
  • This control strategy has a very important reference value for the research of the field-weakening control strategy of the permanent magnet synchronous motor drive system.
  • A semi-physical simulation experiment based on dSPACE is done, which effectively verifies the correctness of the proposed method.

Abstract (1025 Views) | Full-Text (PDF) (519 Downloads)   |   Highlights
  • A generic approach is presented for the estimation of conduction and dead-time voltage drops in multilevel asymmetric CHB converters.
  • It is shown that, unlike the conventional CHB converters which use the phase-shifted PWM, the aforementioned voltage drops are to be computed in a different manner in level-shifted PWM.
  • The output impedance of the generic ACHB is also computed.

Abstract (1093 Views) | Full-Text (PDF) (546 Downloads)   |   Highlights
  • Numerical analysis of two models of useful single-phase induction motor has been done by Maxwell Software.
  • The widespread winding of them extracted and introduced.
  • The magnetic pressure in these motors has been calculated.
  • Two new winding designs have been introduced for these motors.
  • With these windings, more dynamic characteristics of machines have been improved.

Abstract (954 Views) | Full-Text (PDF) (446 Downloads)   |   Highlights
  • Speed estimation based on a new approach to the MRAS technique.
  • Online adjustment of the parameters of the adaptation mechanism of Estimator (MRAS).
  • Online identification of rotor resistance.

Abstract (1253 Views) | Full-Text (PDF) (560 Downloads)   |   Highlights
  • In this paper, a new structure for cascade multilevel inverter is presented.
  • For the proposed cascade topology, two algorithms are presented to produce all possible levels at the output voltage waveform.
  • The required analysis of the voltage rating on the switches is provided.
  • The proposed 15-level inverter is compared with the other presented inverters in literature in terms of the number of dc voltage sources, switches, drivers, and blocked voltage by switches.
  • To verify the performance of the proposed inverter, the experimental results for a 15-level inverter are provided.

Abstract (1306 Views) | Full-Text (PDF) (706 Downloads)   |   Highlights
  • A novel rotor pole shape design for 24/16 pole SRM to reduce slope of single-phase torque waveform is presented.
  • Torque Ripple reduced about 3.4% by new shape rotor pole without changing the pulse width and type of current excitation (current chopping control).
  • Torque ripple reduced to about 46.7 % by using new rotor pole shape and suitable pulse widths for excitation of phases.

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© 2021 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.