I will be installing a PLC to monitor a 3 phase delta electrical service. I am installing current transducers to measure Ia, Ib, and Ic, and voltage transducers to measure Vab Vbc and Vca. I am not sure how to calculate the apparent power with these values as the system will not be perfectly balanced.]]>

ak]]>

Isolating variable with constant power load]]>

includes a switch for my study.

Vi(t) ----- sw ----- R ----- L ----- Vo(t)

i(t) →

GND ------------------------------ GND

When the switch is on or off, it is so easy to get equations as follows;

OFF: di(t)/dt = -(R / L) i(t) (Eq. 1)

ON: di(t)/dt = -(R / L) i(t) + (1 / L) {Vi(t) - Vo(t)} (Eq. 2)

I just want to simulate a broken switch, which can not turn off...

How can I replace a switch in series RL circuit with a variable resistor?]]>

theoretically we say twice, but in real life we say the same thing? we are generally say in real life it's recurred one ..

any help to understand the concept of the meaning "recurring" and how it's compiled in math?

thanks alot]]>

I have the following formula.

4.78 = ((1000 / 3001) * 86) / 6.0

Works good.

Now lets say I have a number of 4.54, how can I calculate a number to go where 6.0 is that would give me 4.54 using the same numbers from the formula above such as.

4.54 = ((1000 / 3001) * 86) / 6.32

So the last number is what needs to be calculated using 4.54 and the rest.

Thanks]]>

Some segment, the circle, stretch the circle out, then transform the saw tooth area into a rectangular area.

Some slice the circle into skinny rectangles for the area.

And the neat one.....slicing concentric radii up and stacking into a triangle. This one caught my attention.

This is the one where the radius is cut longways, and all the concentric perimeters are straightened and lined up on that radius into a triangle. And that is really neat,...

Hayseed Circular Tear-down]]>

(A,B is an events.)

my question if A doesn't occur, that means there's a possibility that A satisfy that "specific statement", also there's a possibility A will not satisfy that "specific statement", so we don't have definitely data what's going if A doesn't occur, so we can't claim that if A doesn't occur, then definitely the specific statement satisfied !]]>

Wolfram Alpha did it for me but not showing the successive steps. Tried using trigonometric identities but no joy.

Could anyone detail the steps? Thanks.

View attachment 176019]]>

Secondly, if I want it in the f-domain instead of w/omega domain, what's the frequency of the "?" i.e. delta(f-?)]]>

View attachment 174865]]>

The Internet Archive has a collection of opensource books and papers on Mathemetics:

https://archive.org/search.php?quer...iatype:"texts"&and[]=languageSorter:"English"

Bertus]]>

I have this function:

And I was trying to solve for z with the help of an iteration.

I start at

z(0) = 0.748

z(1) = 4.359

z(2) = -0.224

But for example, if I use almost the same function

I can find the solution

Hence my question is what value or method I should use to be able to solve it?]]>

I am not very new to electronics but new here.

I have been doing electronics in the past but in a very practical way, not dealing with any kind of theory and calculation. Lately, I have been studying some mathematics, physics, and some theory of electronics and so I'm calculating some things.

I am familiar with how to round numbers off for example when you're solving a physics or chemistry problem, rounding numbers off, significant digits and the whole story but it seems...

How to Round Numbers in Calculation]]>

I want to indicate its capacity on LabVIEW. So I just need some multiplier and scaling factors for the voltage. Although, I don't know how exactly.

Equation: 5.4857x - 7.1607

View attachment 171618

The bin is 25" high. So 25” – z (inches) equals the capacity. For instance:

1 mV → 8” = 5340.7 in^3

3 mV →...

Converting a linear equation into the inverse for indicating capacity]]>

Code (C):

- public class Vector
- {
- public double X;
- public double Y;
- public double Cross(Vector v)
- {
- return X * v.Y - Y * v.X;
- }
- }

It returns a scalar quantity.

Can someone please tell what this is called and what the result represents, please?]]>