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A single-phase half bridge inverter is connected to a 230 V dc source which is feeding a R load of 10 Ω. Determine the fundamental power delivered to the load.
c Explanation: The fundamental power is the power delivered to the load due to the fundamental components of voltage and current. V 1 (rms) = 2Vs/√2π = 103.552 V I 1 (rms) = V 1 /R = 10.3552 A P = (I 1 ) 2 x R = 1072.3 W = 1.0723 kW
c
Explanation: The fundamental power is the power delivered to the load due to the
fundamental components of voltage and current.
V
1 (rms) = 2Vs/√2π = 103.552 V
I
1 (rms) = V
1
/R = 10.3552 A
P = (I
1
)
2 x R = 1072.3 W = 1.0723 kW
See lessThe distortion factor (μ) is the ratio of
d Explanation: μ = V 1 /V
d
Explanation: μ = V
1
/V
See lessIf V r is the rms value of the inverter output voltage and V 1 is the rms value of the fundamental component, then the total harmonic distortion (THD) is given by
c Explanation: THD is the ratio of rms value of all the harmonic components to the rms value of the fundamental component. Rms value of all the harmonic components V H = (V r 2 – V 1 2 ) 1/2 THD = (V r 2 – V 1 2 ) 1/2 / V 1 .
c
Explanation: THD is the ratio of rms value of all the harmonic components to the rms
value of the fundamental component.
Rms value of all the harmonic components V
H = (V
r
2 – V
1
2
)
1/2
THD = (V
r
2 – V
1
2
)
1/2
/ V
1
.
See lessThe total harmonic distortion (THD) is the measure of
c Explanation: Lower the value of THD, closer is the waveform to a sine-wave.
c
Explanation: Lower the value of THD, closer is the waveform to a sine-wave.
See lessThe HF (Harmonic factor of nth harmonic) is the ratio of
d Explanation: HF is the ratio of rms value of the nth harmonic voltage component to the rms value of the fundamental voltage component
d
Explanation: HF is the ratio of rms value of the nth harmonic voltage component to the
rms value of the fundamental voltage component
See lessThe Total Harmonic Distortion (THD) is the ratio of
a Explanation: THD = Vo/V 1 V 1 = Fundamental component Vo = value of all the harmonic components expect the fundamental.
a
Explanation: THD = Vo/V
1
V
1 = Fundamental component
Vo = value of all the harmonic components expect the fundamental.
See less___________ is the measure of the contribution of any individual harmonic to the inverter output voltage.
c Explanation: The HF or Harmonic factor is the ratio of the nth harmonic voltage component to the fundamental voltage component. Hence it shows how much a particular harmonic is contributing in the total output of the circuit.
c
Explanation: The HF or Harmonic factor is the ratio of the nth harmonic voltage
component to the fundamental voltage component. Hence it shows how much a
particular harmonic is contributing in the total output of the circuit.
See lessThe harmonic factor of nth harmonic is given by
c Explanation: It is the ratio of rms value of the nth harmonic voltage component to the rms value of the fundamental voltage component (V 1 ).
c
Explanation: It is the ratio of rms value of the nth harmonic voltage component to the rms
value of the fundamental voltage component (V
1
).
See lessIn VSI (voltage source inverters)
c Explanation: In VSIs the voltage is independent on the load impedance Z
c
Explanation: In VSIs the voltage is independent on the load impedance Z
See lessLet Vs be the amplitude of the output voltage and P be the output power for a single-phase half bridge inverter. Then the corresponding values for a full bridge inverter would be
a Explanation: The voltage is doubled (4Vs/π) in full and (2Vs/π) in half bridge configuration. As the power is proportional to the square of the current which is proportional to the voltage it is 4 times that obtained by a half ridge configuration
a
Explanation: The voltage is doubled (4Vs/π) in full and (2Vs/π) in half bridge
configuration. As the power is proportional to the square of the current which is
proportional to the voltage it is 4 times that obtained by a half ridge configuration
See less