All Questions
Tagged with load transformer
17
questions
1
vote
0
answers
147
views
Uneven Brightness Curve When Using Digital Triac Dimmer on Neon Transformer
I am working on an AC dimmer project using the following circuit:
This circuit functions by detecting zero crossings in the AC power input via the LTV814 optocoupler connected to a pull-up input pin ...
- 495
1
vote
1
answer
125
views
In a transformer, how do you determine where the induced EMFs (E) and voltages (V) are placed in a vector diagram?
I will be citing pictures from Electrical Technology by Theraja.
So there are different cases with regards to the transformer depending on what losses and loads are considered. Each of them have ...
- 469
1
vote
1
answer
1k
views
How bad is it to momentarily overload a transformer? [closed]
I have an espresso machine from the US running on a transformer in the UK. Inside the machine there is a grinder, a pump, and some heating elements. The machine is labeled 120VAC 1150W.
I have it ...
- 111
0
votes
0
answers
251
views
Drive Capacitive load with toroidal transformer
this question is related to my previous post:
Toroidal transformer voltage breaks down
I am trying to build a circuit that drives a capacitive load (approx. 9nF) through use of a toroidal transformer. ...
4
votes
4
answers
476
views
Question about ideal transformers and inductors
Recently I was studying about alternating currents and transformers and I got confused about some of the concepts. I tried a lot of sources but none of them seemed to address the problem.
I ...
- 215
5
votes
4
answers
2k
views
When transformer rating is in kVA, why load is mentioned in WATTS?
The transformer rating is given in kVA, but the load connected is always considered in watts. Why?
Eventhough, the load active power is represented in watts it has some reactive power, right?
Is ...
- 51
0
votes
1
answer
1k
views
Off-load voltage of wall-warts
I need to regulate an incoming DC supply from a wall-wart down to 5 volts. I'm experienced with designing power supplies with ordinary transformers. In this situation, the maximum voltage I can expect ...
- 221
0
votes
1
answer
6k
views
Safe load on a 40 VA Transformer
I apologize ahead of time for this elementary, and quite possibly poorly posed, question, but I am a coward and want to make sure that I am understanding everything correctly, and not blow four motors....
- 103
1
vote
1
answer
1k
views
Resistive and inductive load on same transformer?
Is it ok/safe to put both a resistive load (heating elements) and inductive loads (servo motor) on the same leg of a 240VAC transformer? I have some electrical knowledge but it has been a while since ...
- 163
1
vote
2
answers
7k
views
Current in transformer secondary
I'm reading an old military electronics manual and there is a chapter on transformers which has some confusing information.
There is a schematic of a step-up transformer similar to this:
simulate ...
- 3,217
0
votes
4
answers
1k
views
Transformer output voltage calculations using load current
I can't find formula for this. I have rated load current, acutal load current, rated output voltage and variability of output voltage (given in percentage).
How to find no-load output voltage and ...
- 493
0
votes
2
answers
321
views
Do Transformers Produce a Load? [duplicate]
I've recently been trying to figure out how to use transformers, coils, and inductors in general. My question here is whether transformers produce a load or not. For example, if I apply current to the ...
- 81
1
vote
2
answers
721
views
Transformer Loading Conditions
What is the difference between rated voltage and full load voltage of a transformer? Are the ratings given on the nameplate at full load? Suppose if transformer is at full load, then are the voltages ...
- 111
0
votes
1
answer
2k
views
Transformer output connected to another transformer. Measuring 'Real Power' at input of first transformer
I have a watt meter connected to the primary of one transformer to measure power. The output of this transformer is connected to the input of another transformer.
The watt meter is measuring the ...
- 65
0
votes
1
answer
105
views
Transformer size?
How can I set the size of a transformer for a cooling fan project? The load is 100A, the power supply is 125A, we will take input from 230Ac 60Hz. Incoming two phases and outgoing also two phases but ...
