input current of single phase controlled bridge rectifier

Discussion in 'Homework Help' started by cpleng7, Mar 19, 2011.

1. cpleng7 Thread Starter Active Member

Dec 18, 2008
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May I know how to calculate input current for single phase controlled bridge rectifier?

2. t_n_k AAC Fanatic!

Mar 6, 2009
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It's not that simple, since the current depends on the type of load. For a purely resistive load then a possible solution would be

$I_{rms}=I_m \sqrt{\frac{1}{2}-\frac{\theta}{2 \pi}+\frac{sin(2 \theta)}{4 \pi}}$

where Im=peak current & θ= firing delay angle

3. cpleng7 Thread Starter Active Member

Dec 18, 2008
120
0
this Irms formula not finding the Irms for the output current?

4. t_n_k AAC Fanatic!

Mar 6, 2009
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The RMS values for load current and input current would be the same.