A single-phase full-bridge DC / AC inverter is supplied with a direct voltage of 400 V and modulated with a "voltage cancellation switching scheme" as shown below. Calculate the angle ẞ that cancels the third harmonic in the output voltage.

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Electrical Engineering
A single-phase full-bridge DC / AC inverter is supplied with a direct voltage of 400 V and modulated
with a "voltage cancellation switching scheme" as shown below. Calculate the angle ẞ that cancels
the third harmonic in the output voltage.
VAN
DA+
DB+
B
UBN
IL.....
1.0
0.8
0.6
0.4
0.2
5th
TA-
7th
4
DA-
(a)
N
TB-
Total harmonic
distortion
3rd
0
(c)
Answer alternatives:
a) 0°
b) 90°
c) 30°
d) 60°
e) 45°
Fundamental
Da-
120
180
ak
180
(180-a)
8.
180
(b)
(180
tod
(180-a)
- (90-2)*
Transcribed Image Text:Electrical Engineering A single-phase full-bridge DC / AC inverter is supplied with a direct voltage of 400 V and modulated with a "voltage cancellation switching scheme" as shown below. Calculate the angle ẞ that cancels the third harmonic in the output voltage. VAN DA+ DB+ B UBN IL..... 1.0 0.8 0.6 0.4 0.2 5th TA- 7th 4 DA- (a) N TB- Total harmonic distortion 3rd 0 (c) Answer alternatives: a) 0° b) 90° c) 30° d) 60° e) 45° Fundamental Da- 120 180 ak 180 (180-a) 8. 180 (b) (180 tod (180-a) - (90-2)*
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