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Questions related to Electrical Engineering
In grid connected mode
05 May 2017 4,010 7 View
Can we use tri-vector meter to measure bidirectional AC power flow?
05 May 2017 2,013 3 View
I want to plot B-H curve of a toroidal transformer. I want to do it in Matlab or LabView without using built in functions or tool boxes. I have the following information 1) The input current to...
05 May 2017 3,933 17 View
I know that executing with a complex boolean expression, due to short circuit evaluation some atomic conditions are unvisited/not-tested/not-executed for both true and false value. Actually...
05 May 2017 5,513 14 View
Which of the IEEE 37 Stds describes the closing time of circuit breakers below 1000V? Please, don’t state a Std just because of its title (page/section, etc). Cheers.
05 May 2017 1,496 3 View
How to protect the electrical installations in the aircraft in case of lack of ferroresonance or other similar? (fault currents of high-frequency)
05 May 2017 6,315 1 View
This question might seem personal and of course, it is, but many of my friends are facing this problem. I am a sophomore student and I want to do research in the field of electrical and electronic...
01 May 2017 8,868 2 View
Mathematical analysis of current waveform
26 April 2017 370 2 View
The question is related to calculating the current rating from heat flow equations in IEEE Std. 738-2012. I = sqrt((q_c+q_r-q_s)/(R)) If the solar heat gain (q_s) is greater than q_c and q_r the...
23 April 2017 1,536 6 View
It should be buck boost (isolation reqd) with mppt voltage of 300 - 1000 VDC to output 650VDC. if not single 50 KW preferred, how many trackers can be used? Edit : Output DC is converted to three...
20 April 2017 9,833 8 View
What is the range of maximum DC link voltage on the grid connected solar system at present? Why we need to go for higher DC voltage?
20 April 2017 7,608 3 View
When Direct Torque Control (DTC) is used in variable frequency drives to control the torque of three-phase AC electric motors., you can interpret physically and analytically decoupling between...
14 April 2017 1,411 3 View
after removing some overloaded branches, power system is divided into some groups( each groups might contain generator or not), how can I calculate DC power flow in each single group by using...
13 April 2017 2,811 1 View
I am trying to use 9 V DC relay board to power 24 V DC pmeumatic valves (normally open, from FESTO) and I do not see any change in pressure while the valves are supposedly ON-OFF. I tested the...
10 April 2017 1,123 4 View
dear All, can any one propose me a practical circuit for that? with best Regards, Rasool
04 April 2017 5,835 8 View
I prefer cascaded H-bridge because its higher power ratings and no need for clamping diode or capacitors
04 April 2017 4,194 3 View
Can we control the RMS or Maximum output voltage of an inverter by the control circuit?the classic method is to include a DC/DC converter to control the maximumm voltage. The inverter is used to...
04 April 2017 9,537 8 View
In my vibrational energy harvesting application I'm trying to figure out if a NiMH battery can simply be recharged by rectifying and smoothing the output voltage of the harvester, or if they do...
04 April 2017 3,122 9 View
design the circuit value of coil and capacitor
04 April 2017 8,631 4 View
Potential induced degradation is occurred due to system voltage on PV module from the large string voltage. So voltage stress on the negative end module is equal to the sumation of the Vmax of...
04 April 2017 6,939 3 View
Bulk capacitors are among the electronic components with lowest reliability and avoiding or reducing their values could meet the requirements regarding high reliability, as well as requirements...
04 April 2017 6,231 3 View
Normal switch mode power supply have output switching noise, what cause it and how to solve it ?
04 April 2017 4,060 1 View
If it is then why we are still using PLC system.
04 April 2017 10,116 2 View
Is there any impact on load handling capability, losses or power quality?
04 April 2017 9,959 1 View