How to convert DC input voltages (17-90V) to 18V output using isolated topology?

06 July 2017 8,484 5 View

What is the best topology for 50 KW Solar MPPT charge controller?

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...

03 April 2017 2,332 9 View

How to calculate LC filter values in Single phase diode rectifier circuit?

Vdc=24, Idc=10A, Ripple

02 March 2017 5,365 0 View

How to achieve <1% current regulation of set value in charger cum regenerative discharger used for formation of batteries?

Current system is able to achieve 2% of full scale value instead of set value. For eg., in 360V, 100A, for 100A (Full scale) 2% is 2A regulation could be achieved. But if I set 10A (set value) to...

01 February 2017 4,285 13 View

In three phase inverter during unbalance condition,control loop corrects output voltage but line current is lagging or leading. What am I missing?

31 December 2015 7,023 4 View

Three phase inverter using three-single phase full bridge or three phase 3 leg config?Which is better approach in terms of practical implementation?

31 December 2015 7,709 12 View

How to eliminate 5th and 7th harmonics completely in 12 pulse SCR rectifier?

Theoritically 5th and 7th harmonics doesnt exist in 12 pulse rectifier. But when i observed practically, it exists in the range of 4-5%. Can someone give idea on how to eliminate those to make it...

04 May 2015 9,342 8 View

What are the possible and highly effective harmonic reduction methods in dq control of three phase inverter?

The three phase inverter is connected to star connected high crest factor load. So, high voltage and current harmonics are produced at the inverter output. Control is based on d-q theory. My...

11 December 2013 7,699 7 View

Currently I'm working on a 3 phase grid tie inverter in matlab. How can I make the voltage and the current of grid exactly in phase?

Right now, I'm facing a problem that my grid current is leading grid voltage around 90 deg. I also came up with a solution of connecting phase shifter in control part. If thats d solution, how...

10 November 2013 8,713 0 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View