(a) Consider a bipolar single-phase half-bridge inverter shown in Figure Q3a. The load is a motor with inductance L = 15 mH, the electromagnetic force E, = 230 V, the frequency f = 50 Hz, and the DC input voltage is Va = 800 V. Calculate: (i) The frequency modulation ratio, m, considering the frequency of the triangular signal is 750 Hz. (ii) The amplitude modulation ma when the output voltage is 230 V? (iii) The output voltage Vo1 for P = 1 kW and Q = 500 VAR.

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(a) Consider a bipolar single-phase half-bridge inverter shown in Figure Q3a. The load is a motor with
inductance L = 15 mH, the electromagnetic force E, = 230 V, the frequency f = 50 Hz, and the DC input
voltage is Va= 800 V. Calculate:
(1)
The frequency modulation ratio, mf, considering the frequency of the triangular signal is 750 Hz.
The amplitude modulation ma when the output voltage is 230 V?
(ii)
The output voltage Vo1 for P = 1 kW and Q = 500 VAR.
(iv)
The output voltage Vo1 when P = -1 kW (rectifier mode), for the same Q.
Induction-motor load
UL = VL1 + Vripple
Single-phase
inverter
e, = 12 E, sin wit
Vo1
"jl@,L)%1 = VL1
E,
Figure Q3a Single-phase inverter.
Transcribed Image Text:(a) Consider a bipolar single-phase half-bridge inverter shown in Figure Q3a. The load is a motor with inductance L = 15 mH, the electromagnetic force E, = 230 V, the frequency f = 50 Hz, and the DC input voltage is Va= 800 V. Calculate: (1) The frequency modulation ratio, mf, considering the frequency of the triangular signal is 750 Hz. The amplitude modulation ma when the output voltage is 230 V? (ii) The output voltage Vo1 for P = 1 kW and Q = 500 VAR. (iv) The output voltage Vo1 when P = -1 kW (rectifier mode), for the same Q. Induction-motor load UL = VL1 + Vripple Single-phase inverter e, = 12 E, sin wit Vo1 "jl@,L)%1 = VL1 E, Figure Q3a Single-phase inverter.
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