13 Questions 60 Answers 0 Followers
Questions related from Mohammad Naser Hashemnia
Dear all, I hope you are doing well. This semester, I have a power system analysis course; I am now teaching the chapter devoted to unbalanced operation modeling of power systems. Using the...
07 December 2024 3,141 3 View
I have seen that some lecturers claim the leakage flux of a transformer will automatically become zero in case it has an ideal iron core. I want to say NO! This is correct for a system with a...
04 May 2024 4,058 14 View
Dear all, My question is regarding the synchronous reference frame phase-locked loop (SRF-PLL), as discussed in the book "Doubly fed induction machines:Modelling and control for wind energy...
27 November 2019 2,082 5 View
Dear all, As you know, one method of maximum power point tracking in wind turbines is to select the reference active power which complies with the maximum power that is achievable (power at...
05 November 2018 5,149 6 View
Dear All, A question has arised in my mind regarding the importance of a wind energy conversion system comprising of a PMSG directly connected to the wind turbine (ie, direct drive) and a...
02 June 2018 8,017 13 View
Dear all, As you know, there are many publications regarding active and reactive power control in a wind energy conversion system. For instance, decoupled active and reactive power control of a...
02 June 2018 5,654 12 View
I am going to design a permanent magnet synchronous motor (PMSM). It is supplied by a voltage source inverter. As the number of poles are to be determined, I need to know the nominal frequency of...
31 October 2014 8,755 3 View
It is clear that we have forward and backward rotor currents. My question is: Which component has higher amplitude assuming that the rotor is rotating; the forward component (having frequency of...
17 October 2014 7,052 8 View
Dear All, I have read in the Generalized Theory of Electric Machines book by P.S. Bimbhara that the speed voltage in the rotor d-axis winding of Kron's primitive machine model is dependent on the...
06 October 2014 9,207 7 View
I would like to know the routines and algorithms to design a permanent magnet synchronous (PMSM) motor. Could you please help me in this regard?
18 May 2014 136 2 View
I have seen this question regarding DC motors: Which type of dc motor take constant power from supply even when load various? One has answered it like this: No motor takes constant power from the...
29 December 2013 9,016 3 View
I have a question regarding the famous statement regarding DC series motors, that is: DC series motors have the highest torque as torque is proportional to armature current squared. I have read in...
01 August 2013 1,981 2 View
Dear all, As you know, the loss minimization control has been extensively addressed in many papers for both induction motors, and recently for doubly fed induction generators used in wind energy...
01 January 1970 1,383 3 View
