Homework Answers
First find the fundamental output voltage. Then look up the table to find the harmonic voltage factors (I have taken the table from Ned Mohan book as you haven't provided).
Note that for bipolar modulation scheme only mf and mf + 2 harmonics are present while for unipolar only 2mf + 1 is present.
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QUESTION 2 (Total 12.5 Marks) PWM switching scheme is used for a single phase inverter with m 36 and mo0.7 and Vd 230 V...
Q1- The three-phase converter circuit of Fig. 1, Vd 300 V, is applied with PWM switching (mo 0.5, m 39), and the fund...
Q1- The three-phase converter circuit of Fig. 1, Vd 300 V, is applied with PWM switching (mo 0.5, m 39), and the fundamental frequency is 50 Hz. Calculate the rms values of the fundamental-frequency voltage and some of the dominant harmonics in the line voltage (line-to-line). The generalized harmonic lookup table is given below the diagram. S1 S5 dc Fig. 1 Table 8-2 Generalized Harmonics of vL for a Large and Odd m/ That Is a Multiple of 3 0.2...
bridge oad DC DC Vload DC For a single-phase DC-AC inverter with an RL load at the output. It is switching using the bi...
bridge oad DC DC Vload DC For a single-phase DC-AC inverter with an RL load at the output. It is switching using the bipolar SPWM method with the desired fundamental frequency of 400 Hz and the switching frequency of 20.4 kHz. Here the modulation index is 0.6, input DC is 200 V, load R-5 Ω and L 2 mH a. What's the RMS value of the fundamental component of the output voltage across RL? b. What's the RMS value of...
Example 1: Switch-mode inverter (one phase-leg, half bridge) A general analysis of the switch-mod...
Example 1: Switch-mode inverter (one phase-leg, half bridge) A general analysis of the switch-mode inverter (shown in the figure below) is to be done. The switching frequency f, which is also the frequency of the triangular signal is 1450 Hz. The DC voltage, Vd, is 600 V. Output voltage is sinusoidal voltage with a frequency equal to 50 Hz. The load is connected between the inverter leg A and the dc voltage midpoint o. A+ A+ A V Find the...
#3 part c please 3. Given a single-phase inverter. If the output voltage VAs is of...
#3 part c please
3. Given a single-phase inverter. If the output voltage VAs is of the form shown below D11 S D3 S1 T3 VDC/2 50V T2 T4 VDC/2 50V D2 S4 D4 e. (degrees) 45 a. Determine the transistor switching pattern used to achieve the voltage b. True/False: The waveform above has a lower 3rd harmonic component than that of standard 180° switching scheme. Support your answer with appropriate mathematics If the load is purely inductive, the inverter...
Q1- The three-phase converter circuit of Fig. 1, Vd 300 V, is applied with PWM switching (mo 0.5, m 39), and the fundamental frequency is 50 Hz. Calculate the rms values of the fundamental-frequency voltage and some of the dominant harmonics in the line voltage (line-to-line). The generalized harmonic lookup table is given below the diagram. S1 S5 dc Fig. 1 Table 8-2 Generalized Harmonics of vL for a Large and Odd m/ That Is a Multiple of 3 0.2...
bridge oad DC DC Vload DC For a single-phase DC-AC inverter with an RL load at the output. It is switching using the bipolar SPWM method with the desired fundamental frequency of 400 Hz and the switching frequency of 20.4 kHz. Here the modulation index is 0.6, input DC is 200 V, load R-5 Ω and L 2 mH a. What's the RMS value of the fundamental component of the output voltage across RL? b. What's the RMS value of...
Example 1: Switch-mode inverter (one phase-leg, half bridge) A general analysis of the switch-mode inverter (shown in the figure below) is to be done. The switching frequency f, which is also the frequency of the triangular signal is 1450 Hz. The DC voltage, Vd, is 600 V. Output voltage is sinusoidal voltage with a frequency equal to 50 Hz. The load is connected between the inverter leg A and the dc voltage midpoint o. A+ A+ A V Find the...
#3 part c please
3. Given a single-phase inverter. If the output voltage VAs is of the form shown below D11 S D3 S1 T3 VDC/2 50V T2 T4 VDC/2 50V D2 S4 D4 e. (degrees) 45 a. Determine the transistor switching pattern used to achieve the voltage b. True/False: The waveform above has a lower 3rd harmonic component than that of standard 180° switching scheme. Support your answer with appropriate mathematics If the load is purely inductive, the inverter...
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