Full Bridge Controlled rectifier

版本 1.0.0 (27.5 KB) 作者: Dr. Madhusudhan M
Detailed basics on full-bridge controlled rectifier for R load
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更新时间 2022/4/9

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Full Bridge Controlled Rectifier
In full bridge controlled rectifier both positive and negative half cycle is controlled by firing angle.So we need to trigger the scr.
Basic of firing angle control logic is
T1T2----------Fired at alpha, 2pi+alpha, 4pi+alpha...
T2T3----------Fired at pi+alpha, 3pi+alpha 5pi+alpha...
basically its is 30 degree firing from 0 ref for positive cycle , similarly it is 30 degree firing angle from pi for negative half cycle.
Asian Power Frequency is 50Hz(India)
f=50Hz T=1/f=1/50=0.02sec to complete one full cycle
2pi radian=360deg= 0.02sec
Now am choosing firing angle is of 30 deg so firing angle should be
360 deg= 0.02 sec=2pi
180 deg= 0.01 sec= pi
30 deg= X?
alpha in deg alpha in sec
X=Time period to trigger SCR/thyristo
just do cross multiplication
X=(0.02*30)/360=1.6666667*10^(-3)=1/600(which i substitute in the pulse generator delay angle)
alpha in deg alpha in sec
30 deg= 1/600
T1T2---------Firing angle in sec=1/600=alpha in sec
alpha in deg alpha in sec
30 deg= 1/600(delay)(which i substitute in the pulse generator1 delay angle)
T3T4---------Firing angle in sec=pi+alpha=0.01+
alpha in deg alpha in sec
pi+alpha
180+30
210 deg= 7/600(delay)(which i substitute in the pulse generator2 delay angle)
Vm=100
alpha=30 deg
Absorb the waveforms
one who interseted in THD calculation you can use power gui and select FFT analysis

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Dr. Madhusudhan M (2024). Full Bridge Controlled rectifier (https://www.mathworks.com/matlabcentral/fileexchange/109710-full-bridge-controlled-rectifier), MATLAB Central File Exchange. 检索来源 .

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1.0.0