Q 4(a) Consider the circuit shown in Figure 4. It includes a voltage source, e:(t), and a 6 volt battery. Find suitable state-variable equations for the system. Write an output equation for the output voltage eo. 2 H 6 V 1Ω F0.5 F Figure 4 Q 4(b)
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- What is CEMF?A single phase – half wave controlled rectifier with freewheeling diode is supplying a load consistingseries connected a resistor and an inductance from a 70.7V (RMS), 50Hz sinusoidal AC source.The firing delay of the thyristor is 90° and the load values are R=10Ω, L=0.1 H. Define the loadcurrent expression and draw the load current by calculating for first two periods. And calculate theaverage values of the load voltage and current.Power supply circuit is delivering 0.5 A and an average voltage 20 V to the load as shown in the circuit below. The ripple voltage of the half wave rectifier is 0.5 V and the diode is represented using constant voltage model. The smoothing capacitor value is equal to 220V rmsh soHz} VL-DC =20V 0.01 F 0.02 F 0.0167 F None of the above
- (c) (i) (ii) Draw a half-wave rectifier circuit with a diode which produces a negative output voltage waveform from the following input AC waveform: Vin = 10 sin(10nt) V. In a voltage versus time graph sketch the input and output voltages waveforms. You should show at least 2 periods of the input and output voltage signals, the peak values of the input and output signals and the period of these signals in seconds. Consider that the diode's cut-in voltage (starts to conduct), V, is 0.7 V.H.W3 The single-phase full wave controlled rectifier has a R-L load with R= 0.552 and L= 6.5mH. The input voltage V, 220V at 50Hz. The delay angle is a-30, plot the input and output waveforms. Then determine: -The average thyristor current -The rms thyristor current -The output rms current -The average output current - The efficiency NOTE: Drive any formula that used in solutionA half-wave rectifier is needed to supply 15-V dc to a load that draws an average current of 250 mA. The peak-to-peak ripple is required to be 0.2 V or less. What is the minimum value allowed for the smoothing capacitance? If a full-wave rectifier is needed?
- The Figure 2 shows an electronic circuit designed for supplying power to a load (R1). The supply voltage 235V (RMS, AC) at frequency of 50HZ. The required DC voltage and power for the load are 24V and 3.6 W respectively. The Electrical Components of this AC to DC converter are: A full-wave rectifier to convert AC voltage to DC voltage. A regulator with transistor and Zener diode to ensure a constant voltage and power for the load. D1 Iide 91 Vaut VLoad D2 D3 Vde VI sine R1 RL Regulate Reetifier Figure 2. Complete Circuit Assume that the diodes are real diodes (NOT ideal diodes). The following information is available: The collector to base resistor of the regulator R1 = 5.0 k The transistor Q1 with B value of 24 is used for the regulator circuit. Determine the following quantities for this electronic device and fill the table below: Question Answer The voltage of Zener Diode (Vz) The current in R1 The DC current into the regulator | (Idc) Base current of transistor (IB) Collector…Q2. A full-wave controlled rectifier circuit with resistive load shown below: Calculate the firing angle (a.) if it is required to obtain an average output voltage of 70% of the maximum possible average output voltage. • Sketch the output Vg & ig Waveform and determine the average current. 1:2 a, = 15 R= 302 Vs -V2x110 Sin 120nt cot VRQ4) Attempt to answer ONE branch only: a) Regarding ripple vector parameter, What are the differences between full wave and half wave rectifiers? b) From the circuit shown below which shows combining a positive clipper with a negative dipper Determine and draw the output voltage waveform? Note that Vp = 0.7V 1.h Vout 15 Vek 3 He V1
- Question 6 ac Load Supply Figure Q6a : Rectifier Circuit a) For the circuit shown in figure Q6a Identify the type of rectifier ii) i) Sketch the output voltage waveform if the load was purely resistive when the thyristor is triggered at a degrees (0 sas 180° ). Determine an expression for the average voltage, VAv, seen across the load. iii) 1 You are given that Vav V sin Ad0A half-wave rectifier circuit has an input voltage of 60V for the entire swing of the input signal from the secondary winding of the transformer. If the load resistance is 900 and a shunt capacitor is connected therein: 1. Draw the circuit 2. Solve the following unknown values. a. The peak voltage V b. the average output voltage Volave) c. the average load current lolavel, d. the rms load voltage Volcms), e. the rms load current loma) f. the ripple factor RF of the output voltage, g. the rms ripple voltage Vrirms) h. the average diode current ID(ave) i. the rms diode current Ipicms), j. the peak inverse voltage PIV of the diode, k. the average output power Polac 1. the DC output power Po(de) m.the frequency fr of the output ripple voltage, n. the input power factor PF.Question 3) An ohmic loaded half-wave controlled rectifier given in the figure below feeds a 25 Q load and the peak value of the source voltage is 350V and its frequency is 50 Hz. Accordingly, find the following desired circuit parameters: a) Effective (rms) voltage of the source, b) the peak current of the load, c) Average stress of the load, d) Average current of the load, e) The effective (rms) voltage of the load, f) Effective (rms) current of the load, g) Power of the load K R