Fully Controlled Bridge Rectifier

Thread Starter

neilio2j

Joined Nov 19, 2007
3
hi im doing a project at college and im trying to find out how to derive the equations for:

a) load voltage
b)supply current

for a circuit with and without a flywheel diode connected

can anyone help? im totally stumped with this
 

hgmjr

Joined Jan 28, 2005
9,029
hi im doing a project at college and im trying to find out how to derive the equations for:

a) load voltage
b)supply current

for a circuit with and without a flywheel diode connected

can anyone help? im totally stumped with this
Can you supply us with a circuit diagram to give us a clear picture of what you are working with?

hgmjr
 

Thread Starter

neilio2j

Joined Nov 19, 2007
3
A flywheel diode is often required, because when the current through an inductive load is suddenly broken, a back EMF will build up as the magnetic field breaks down, and if there is no path for the current, a high voltage builds up. The high voltage can damage a transistor or cause arcing in a switch. The flywheel diode is connected in reverse across the load, and provides a path for the current so the magnetic field and current can safely decline.

there is a copy of the circuit i am working with, sorry i dont know how to post images

http://services.eng.uts.edu.au/~venkat/pe_html/ch04s2/mathsim/cirdia5.gif

when the flywheel diode is attached it will be connected in parallel across the inductor and resistor

thanks for your help guys
 
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