1. ### Rectified Current Through an Inductor

Hello, I need to find the magnetomotive force (mmf) of an inductor using NI (turns multiplied by amperes). The set up is pretty simple, AC power supply set at 24 VAC goes through a full wave rectifier (4 diodes) and into an inductor. If the inductor has a resistance of 47 Ohms, it looks like...
2. ### Why are there three wires in secondary coil of transformer?

This is a 12-0-12 transformer that I intend to use in my circuit: Why are there three wires in the secondary? One is of course the neutral (in black). Why are there two live wires? As an additional question, can I use four 1N5408 rectifier diodes to convert the output of this transformer to...
3. ### Is it possible to charge/discharge this cap fast enough?

Hello, I'm new and I want to try asking here for any comment or suggestion. What I have, is a common 12-pulse rectifier with its bridges in series and I included an snubber between DC-link and rectifier output. Is important to note that all inductances before the rectifier are small in order to...
4. ### How a Bridge Rectifier works

Ok so I've been reading a book on electronics and I got to a section that talks about full-wave bridge rectifiers. This is the diagram the author gives: In this diagram he says the D2 and D4 diode are forward biased. But, doesn't the current flow through D2, goes through the resistor, and then...
5. ### DC link and rectifier model, Active current as function of voltage?

Hi, I'm trying to form an expression for a rectifier supplying a DC link with current, without actually rectifying a 3-phase input. Usage of the model is really only concerned with the RMS values and the active power drawn from the AC supply. The DC link is just a capacitor so that: dVDC/dt =...
6. ### When building a crude full wave rectifier how to improve it?

Say you were building a full-wave rectifier. How many simple ways (if any) are there to reduce the THD on the source caused by using a full-bridge rectifier load? Also, If you used a low pass filter and then an isolation TX (or the other way around?), how much would that help to this end (if at...
7. ### Diodes & rectifiers

Homework Statement I am practicing problems like this: where Vs=10V, R=2kohm, they say it is like a battery + ideal diode with VD=0.7V I have to sketch the transfer characteristic Vo=f(Vs) and draw the waveform of Vo(t) Homework Equations The Attempt at a Solution I am really unsure how to...
8. ### PIV full-wave Bridge Rectifier

Homework Statement Part C of the problem below. I have the solution but I don't follow the logic. Homework Equations Turns ratio: Vp/Vs = Np / Ns KVL I do not think I need any elaborate formulas to solve this. The Attempt at a Solution Solution Provided by instructor: I am confused why...
9. ### Utilising a DC Treadmill Motor

Hi, so I salvaged a 220v, 6.5 amp DC permanent magnet motor from an old treadmill and I was having some trouble with it. I believe that AC motors can simply be run from mains power (I have an AC motor from a dryer that I cut the wires from in order to bypass the circuitry and essentially...
10. ### Quick question about inverter TX order wrt mains

Hi, I should know better, but I'm having a mental blank. I was just wondering, if you're doing something using non-linear components on the mains, could be anything, maybe bucking to make a DC supply, whatever. Is it common practice to use an isolation transformer between mains and the...
11. ### BLDC generator output current

I'm using the following BLDC motor as part of a project to generate power: http://www.rcdude.com/Cobra-C-3520-18-Brushless-Motor-p/c-3520-18.htm I'm able to spin this motor to about 3000 RPMS which gives me about 5 Volts. This is to be expected given that the motor is rated at 550 KVs. I'm...
12. ### Engineering Book recommendations for an Electrical Engineering student.

I was wondering if someone could recommend some electrical engineering books that help explain rectifier circuits and DC chopper circuits. I've read electrical circuit theory and technology by John Bird and electrical machines, drives and power systems by Theodore Wildi and both seem to lack in...