All Questions
22
questions
1
vote
3
answers
95
views
Transistor specs in the capacitance multiplier
I'm working on a constant current power supply and as a first step designed the following rectifier with a filter. I know the bottom rectifier is inactive, but with couple of switches the circuit ...
- 129
0
votes
2
answers
99
views
What damage or reduced performance would result from giving 120 V, 60 Hz AC power to a 115 V, 400 Hz AC/DC rectifier?
This is part of a larger project, and is one sub-question related to a higher-level question I've asked on Reverse Engineering. You may find useful background information there.
I have a controller ...
4
votes
6
answers
1k
views
Is full wave rectified AC, without a smoothing capacitor, okay for switching a DC solenoid and a DC relay?
I have a circuit where the 24V AC secondary voltage of a transformer is full wave rectified to DC.
The only parts that this circuit is connected are some 24VDC solenoids and a 24VDC relay. The ...
- 567
0
votes
3
answers
872
views
Confused in readings of oscilloscope
I have this reading of a oscilloscope for a half wave rectifier:
Pk-Pk voltage is 17.6V.
The channel is set to 5V division. I asked my dad who is a electric engineer and he told me that Vp = 17.6/2 = ...
- 491
1
vote
2
answers
524
views
Do all AC-DC converters produce current spikes in input?
I am designing a simple rectifier circuit with LTSpice (I am planning to build one for myself) and I found out that AC-DC converters require PFC circuits to prevent huge input spikes (?). I tried ...
- 1,039
0
votes
3
answers
231
views
Connect rectifier to DC power source? [closed]
I'm thinking about DC appliances and energy efficiency.
A common appliance like an air conditioner has a rectifier to convert 230V AC into 50V DC. If I connect the appliance directly to 50V DC instead ...
- 1
1
vote
3
answers
524
views
AC to DC converter/rectifier huge input current spike
A simple rectifier circuit results in huge AC input current surge. As I understand it, it is because of the capacitor on the output. How is this problem solved? A resistor on the capacitor? A current ...
- 37
0
votes
0
answers
436
views
AC-DC converter to drive a dc motor (treadmill)
I would like to fix my treadmill.
I have connected a SCR voltage dimmer (WINGONEER AC 220V 4000W) in series with a full-bridge-rectifier (GBPC5006), to the dc motor.
When I move the potentiometer, ...
- 141
0
votes
2
answers
213
views
AC-DC High voltage converter
I don't have much experience with power electronics but I'm trying to design a power supply with AC 220Vrms (311peak) to DC 1500V converter to charge a capacitor in 50 miliseconds (and keep charging ...
1
vote
1
answer
341
views
Three-phase rectifier for offline single-phase supplies
First thank you for the help. I'll try to explain my self for this problem and sorry in advance if I'm not very clear, english is not my native language.
I'm making a universal PCB design involving ...
0
votes
3
answers
232
views
Powering small DC load ( 1W ) using 220V AC supply
I am trying to design a small control circuit for controlling large currents (not too large, around 200W, AC 50Hz). I have kept in the AC circuit isolated from the DC control circuit. But the problem ...
0
votes
1
answer
123
views
misunderstanding of Voltage output of a 3-phase rectifier
I simulated a 3 phase rectifier :
I obtained V1 and V2 as plotted below :
I dont understand that waveform as i'm supposed to obtain a DC voltage.
Can someone explain me how it comes that i got this ...
- 11
3
votes
2
answers
3k
views
How to find the right smoothing capacitor for rectification circuit
I am creating a power supply which will need to convert the 24vac to 5vdc. I am thinking of using a rectifier to convert ac to dc, then a capacitor to smooth out the voltage, then an LM2596-5 to drop ...
- 91
0
votes
2
answers
272
views
2
votes
2
answers
1k
views
What is deciding the current of an AC to DC circuit
I'm a beginner, trying to build a power supply based on the sketch below to convert 230V AC to 5V DC. My final aim is to supply precision voltage for Arduino, which I think is 5V 700mA.
Here is the ...
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