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1. A three-phase bridge inverter PWM modulation as shown in Fig. 3-1 has a purely Y-connected balanced-resistive load of $R_a = R_b = R_c = 7 \Omega$. The DC input voltage of $V_s = 120 V$. The inverter switching frequency is $f_o = 50 Hz$. Calculate the performance parameters. Assume ideal transistor switches. (a) the rms line voltage $V_L$ (b) the rms phase voltage $V_p$ (c) the rms line voltage $V_{L1}$ at the fundamental frequency, (d) the rms phase voltage at the fundamental frequency $V_{p1}$ (e) the average transistor current $I_{Q1(avg)}$ (f) the rms transistor current $I_{Q1(rms)}$

          1. A three-phase bridge inverter PWM modulation as shown in Fig. 3-1 has a purely Y-connected balanced-resistive load of $R_a = R_b = R_c = 7 \Omega$. The DC input voltage of $V_s = 120 V$. The inverter switching frequency is $f_o = 50 Hz$.
Calculate the performance parameters. Assume ideal transistor switches.
(a) the rms line voltage $V_L$
(b) the rms phase voltage $V_p$
(c) the rms line voltage $V_{L1}$ at the fundamental frequency,
(d) the rms phase voltage at the fundamental frequency $V_{p1}$
(e) the average transistor current $I_{Q1(avg)}$
(f) the rms transistor current $I_{Q1(rms)}$

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1. A three-phase bridge inverter PWM modulation as shown in Fig. 3-1 has a purely Y-connected balanced-resistive load of Ra = Rb = Rc = 7 Ω. The DC input voltage of Vs = 120 V. The inverter switching frequency is fo = 50 Hz.
Calculate the performance parameters. Assume ideal transistor switches.
(a) the rms line voltage VL
(b) the rms phase voltage Vp
(c) the rms line voltage VL1 at the fundamental frequency,
(d) the rms phase voltage at the fundamental frequency Vp1
(e) the average transistor current IQ1(avg)
(f) the rms transistor current IQ1(rms)

Added by Monique H.

University Physics with Modern Physics

Hugh D. Young 14th Edition

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Solved by Expert Timothy James

Step 1

Plugging in the given values, we have: V = 120 / √3 ≈ 69.28 V So, the rms line voltage V is approximately 69.28 V. Show more…

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1. A three-phase bridge inverter PWM modulation as shown in Fig. 3-1 has a purely Y-connected balanced. resistive load of Ra = R = Re = 7 Q. The DC input voltage of Vs = 120 V. The inverter switching frequency is f. = 50 Hz. Calculate the performance parameters. Assume ideal transistor switches. (@) the rms line voltage V (b) the rms phase voltage Vp (c) the rms line voltage V1 at the fundamental frequency. (d) the rms phase voltage at the fundamental frequency Vpi (e) the average transistor current IQ1(avg) (f) the rms transistor current Io1(rms) BSZ9OON20NS3 BSZ90ON20NS3 PULSE(0 5V 0 0.1ns 0.1ns 8.333ms 16.667ms BSZ900N20NS3 BSZ900N20NS3 PULSE(0 5V 5.333ms 0.1ns 0.1ns 8.333ms 16.667ms) BSZ900N20NS3 PULSE(05V 11.11ms 0.1ns 0.1ns 8.333ms 16.667ms) BSC900N20NS3 D1 M1 D3 M3 D5 M5 .tran 0 50ms 0 >Rg1 500 Vg3 Rg3 Rg5 Vg5 D 500k VS D D 500k b 10 D6 M6 100V Vg2 D7 500k D PULSE(0 5V8.333ms 0.1ns 0.1ns 8.333ms 16.667ms) PULSE(0 5V 13.889ms 0.1ns 0.1ns 8.333ms 16.667ms) PULSE(0 5V2.777ms 0.1ms 0.1ms 8.333ms 16.667ms Rb Ra 10 Rc 0 10 Fig. 3-1 Three-phase inverter

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