my id is ep0105404 so last digit would be 4
A three-phase uncontrolled rectifier is commonly employed to first converting ac power into de power in most of the motor drives applications. Figure 1 shows the fHz three phase supply AC voltage waveforms. The peak voltage is measured at V.V. The details of the system parameters are summarized in Table 2. 360 390 420 480 400 510 540 3000 120 180 210 240 270 300 330 Figure 1: Three-phase balance AC voltage sources By assuming that the motor drive system can be modelled as an RL-load with L is large enough to cause the load current, I., to be essentially dc. a) Draw a rectifier circuit diagram by including input sources, practical power switches and load. Label all the components accordingly and explain the circuit operation. [10 marks] b) Sketch output voltage, output current, and phase-c source current waveforms for Osas 31. Please label the amplitude of the waveforms and triggering angles clearly in your sketching. Assume that all the power switches are ideal. [10 marks] c) Sketch voltage and current waveforms of two diodes which integrated on phase-leg-b for 05 x 5 31. Please label the amplitude of the waveforms and triggering angles clearly in your sketching. Assume that all the power switches are ideal. [10 marks d) Derive the average output voltage equation and determine the dc-level of the output voltage. 15 marks c) Derive the rms source current and determine the apparent power from the source. 17 marks f) Derive the commutation angle equation and estimate the source inductance value, Ls, based on the given commutation angle, w, listed in Table 2. 18 marks Table 2: System parameters distribution based on last digit number of Class ID Class ID V. (V) f (Hz) 1. (A) Last digit number 0 300 50 12 30 1 280 60 21 45 260 50 19 28 3 400 60 17 15 4 220 50 22 20 5 200 60 20 25 6 330 50 30 35 7 160 60 16 50 8 140 50 14 40 9 500 60 13 18 A three-phase uncontrolled rectifier is commonly employed to first converting ac power into de power in most of the motor drives applications. Figure 1 shows the fHz three phase supply AC voltage waveforms. The peak voltage is measured at V.V. The details of the system parameters are summarized in Table 2. 360 390 420 480 400 510 540 3000 120 180 210 240 270 300 330 Figure 1: Three-phase balance AC voltage sources By assuming that the motor drive system can be modelled as an RL-load with L is large enough to cause the load current, I., to be essentially dc. a) Draw a rectifier circuit diagram by including input sources, practical power switches and load. Label all the components accordingly and explain the circuit operation. [10 marks] b) Sketch output voltage, output current, and phase-c source current waveforms for Osas 31. Please label the amplitude of the waveforms and triggering angles clearly in your sketching. Assume that all the power switches are ideal. [10 marks] c) Sketch voltage and current waveforms of two diodes which integrated on phase-leg-b for 05 x 5 31. Please label the amplitude of the waveforms and triggering angles clearly in your sketching. Assume that all the power switches are ideal. [10 marks d) Derive the average output voltage equation and determine the dc-level of the output voltage. 15 marks c) Derive the rms source current and determine the apparent power from the source. 17 marks f) Derive the commutation angle equation and estimate the source inductance value, Ls, based on the given commutation angle, w, listed in Table 2. 18 marks Table 2: System parameters distribution based on last digit number of Class ID Class ID V. (V) f (Hz) 1. (A) Last digit number 0 300 50 12 30 1 280 60 21 45 260 50 19 28 3 400 60 17 15 4 220 50 22 20 5 200 60 20 25 6 330 50 30 35 7 160 60 16 50 8 140 50 14 40 9 500 60 13 18
