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Questions tagged [delta]

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10 questions with no upvoted or accepted answers
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3 Phase “Black Box” Load

I'm doing a few basic load calculations on a 3 phase circuit at work and I stumbled on a concept I'm not sure how to proceed. Let's say you have a 3 phase load and it is basically a black box. For ...
1
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0answers
19 views

Brushless motor (Delta-wye switch or overvolting at lower current drown)

I have been playing with Motor CAD for a while and can't decide what to do. Here is my problem. I have a building a two-hub electric mountain board. I have motors that are rated for 350W 36V which I ...
1
vote
1answer
253 views

Confusion with applying KCL to three phase delta connection

Below is a 3-phase delta connected for balanced loads Z: Since phase to phase voltages(voltage across loads) have 120 degrees phase differences and since the loads have the same impedance we can ...
1
vote
0answers
124 views

Open Delta's “virtual” power factor

Open Delta yields 57% of power instead of the 86% it would yield if no 30-degree angle gets in the way. Can that 30-degree angle be corrected with a capacitor and an inductor (it requires a cap in one ...
0
votes
1answer
48 views

Delta to delta 2000 kVA transformer

I have a delta to delta 2000 kVA transformer that on power up with no load except whatever is in the main switch gear I am getting 400 volts to ground on one phase 280 on another and 95 on another, ...
0
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1answer
45 views

how to get the line voltage of 3 phase delta circuit with power factor known at first?

In the following picture, it shows that a black box at right. the circuit inside the black box is a 3 phase load balanced delta connection circuit. the line voltage of it is 500V and the power factor ...
0
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0answers
73 views

Three-phase circuit with line impedance

I'm having some trouble with the first part of an exercise. If I only have V1, and Zl, how can I find what the line voltage V2 is equal to? So that, then I could calculate the phase currents A1,A2,A3....
0
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0answers
154 views

Delta modulation slope overloading

I have a question about a problem in a textbook I can't exactly solve. It goes as follow: Given a message m(t) as input to a DM system $$ m(t) = 3cos(890\pi t) - 0.7sin(1000\sqrt{3}t) $$ Determine ...
0
votes
1answer
80 views

Delta Modulation Frequency in the Integrator

Ok guys, I can't understand a thing, I have made this circuit, that is a delta modulator: As you can see with an input of 5Vpp, in the output of the integrator I found a square wave signal, that has ...
0
votes
1answer
29 views

Loading one line from Three Phase Power Delta Configuration

I have been trying to determine whether or not I can run one line from 3-phase power into a power conditioner that requires single-phase input. The current draw on this line would be around 10 A. ...