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Date Posted: 7/9/2008 7:53:54 AM  Status: Live
Electronics
Course Textbook Chapter Problem
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Question Details:
A single phase full bridge inverter  feds power at 50Hz to RLC load with r=5 ohms , l=0.3H and C=50μF. The dc input voltage is 220volts.(a) Find an expression for load current  up to fifth harmonic (b) Calcute the power absorbed by the load abnd the fundamental power (c) rms and peak currents of each thyistor(d) conduction time of thyristor and diodes if only fundamental component were considered.

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Date Posted: 7/10/2008 5:41:58 AM  Status: Live
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Response:
Given,
Frequency,
DC input voltage,
(a)
Expression for the ouput voltage equation for a single-phase full bridge inverter is
 
Load impedance at frequency is

Load current,

(b)
Peak load current,
RMS load current
Load power,
RMS value of fundamental load current
Fundamental load power,
(c)
Peak thyristor current
Rms value of thyristor current
 
(d)
Fundamental component of current is
This current lags the fundamental voltage component by .
 This means that diode conducts for  and thyristor for
∴ Conduction time for thyristors
     Conduction time for thyristors 
Hope this helps you...



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