A Novel Energy Storage System Usage Based on Ultra-capacitor in Variable Speed Wind Turbines (VSWT) for Power Improvement

Mohsen Atash Ab-Parvar; Hamed Hekmati; Alireza Siadatan; Mehdi Bigdeli; Arsalan Hekmati; Mehdi Bagheri

Volume 1, Issue 3 , July 2021, , Pages 7-17


  Wind power as a renewable energy has the potential to become a clean energy source in almost all countries of the world but, there are lots of technical challenges that need to be addressed in advance. Wind speed variation (WSV) is one of the most important issues. Separate from its mechanical effects ...  Read More

A Survey on Permanent Magnet Synchronous Machines: Recent Applications and Trends

Arsalan Hekmati; Iman Sadeghi Mahalli; Mohammad Siamaki

Volume 1, Issue 3 , July 2021, , Pages 42-50


  In the PMSM, by creating a sinusoidal distribution for conductors at the stator surface, the airgap’s flux density is closer to the sinus form [1]. By replacing the field’s winding with a permanent magnet, the brushes, slip-rings, and copper losses could be removed from synchronous motor. ...  Read More

A Comprehensive Review on High Speed Permanent Magnet Motors and their Modern Applications

Arsalan Hekmati; iman sadeghi

Volume 1, Issue 2 , April 2021, , Pages 61-67


  Synchronous speeds in all types of alternating current machines depend on the frequency of the power grid, and performance at higher speeds at steady conditions requires higher frequency feeds. The development of speed control drive technology in recent decades has prompted renewed attention to high-speed ...  Read More