For a three-phase DC/AC inverter, operating in six-step mode with an R-L load, (a) draw the circuit diagram, draw the waveforms of (b) three line-to-line voltages, (c) three line-to-neutral voltages, and (d) three line currents.
For a three-phase DC/AC inverter, operating in six-step mode with an R-L load, (a) draw the...
Problem 3: Sinusoidal PWM or Six-Step Control of three-phase DC-AC Inverter (45 Points) Design a three-phase inverter circuit for a solid oxide fuel cell, whose output voltage changes from 400 Vdc to 600 Vdc. Sinusoidal PWM (SPWM) A. If sinusoidal PWM is used to control the inverter, to obtain a three-phase 240 Vac (line- line RMS value) at 60 Hz, what is the inverter's modulation index (ma) range? (5points) B. Based on part A: Assume the fuel cell's output voltage...
Consider a 3-phase inverter with a delta-connected load operating from a 150 V DC input voltage. The AC load consists of 3 identical impedances with R = 6 Ω and L = 30 mH and a frequency of 60 hz. a. Determine the RMS line voltage VAB. b. Obtain mathematical expressions for each phase of the load currents, IAB, IBC, and ICA.
A purely inductive, balanced, Y-connected load having an inductance L per phase, is fed by the three-phase half-bridge inverter shown below in Figure Q5. The inverter is operated in the square-wave mode (meaning that the pole voltages are square waves) with a frequency fs. A purely inductive, balanced, Y-connected load having an inductance L per phase, is fed biy the three-phase half-bridge inverter shown below in Figure Q5. The inverter is operated in the square-wave mode (meaning that the pole...
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...
2. Figure 2 shows a 6-pulse thyristor rectifier feeding a DC static load an operating at steady-state. The ac input power supply is a symmetric set of three-phase voltages forming a direct sequence, having rms line-to-line voltage of Vuns equal to 415 V and angular frequency ω equal to 100π rad/s. The load is sufficiently inductive to smooth out the load current i(t), i.e. i 1, where I is a constant. a. Derive the mathematical expression of the average DC...
A six-step three-phase inverter has a 480 Vdc source and an output frequency of 60 Hz. Consider a balanced Y-connected resistive load of 16 ohm per phase. Determine the instantaneous source current, the total load power, and the rms line-line (Vab) and the line-neutral (Van) load voltage.
4-13 In the balanced three-phase dc-ac inverter shown in Fig. 4-12b, the phase-A average output voltage is van (t)-40.75 sin(at), where V-300V and a-2π x45 rad /s. The inductance L in each phase is 5 mH. The ac-motor internal voltage in phase A can be represented as et)-106.14sin(ot-6.6°)V, assuming this internal voltage to be purely sinusoidal. (a) Calculate and plot d^(), d,(), and dc(), (b) sketch T) and (c) sketch Tut) 4-13 In the balanced three-phase dc-ac inverter shown in...
P7.16 A 10-kVA three-phase VSI is supplied from a 230-V ac line through a si SIX- pulse diode rectifier. The inverter is designed for a unidirectional powee fer, from dc to ac. Assume the voltage safety margin of 40%, the cures, safety margin of 25%, and determine the minimum required voltage and cur- rent ratings of switches and diodes in the inverter. P7.16 A 10-kVA three-phase VSI is supplied from a 230-V ac line through a si SIX- pulse diode...
Question 2: Three phase circuit. (100p) A wye connected generator supplies a delta connected balanced load through short feeder. seree the load line to neutral voltage as reference voltage phase angle zero. 02.1 Q2.2 Q2.3 Q2.4 Draw the equivalent circuit. 10p Calculate the load line-to-neutral voltages and line-to-line voltages. 20p Calculate the delta load currents and feeder currents. 20p Calculate the supply wye connected generator line-to-neutral voltages. Is the obtained values are acceptable? Calculate the generator real and reactive power...
1. A 50 Hz 3-phase Have wave uncontrolled rectifier circuit is used to supply a resistive load of 100 ohms. The supply is unbalanced and defined as v.-127.28 cos (ot) V 127.28 sin (ot-0.5236) V n63.64 cos (ot+2.0944) V a) Draw the circuit diagram. b) Draw the three phase voltages wave forms. c) Use phasor diagram or any other method to obtain the line voltages v and d) Draw the line voltages v and v wave forms. e) Derive an...