The input voltage to a full-Wave rectifier employing a center-tapped step-down transformer and two silicon diodes is 220V rms, and the transformer has turns ratio n=0.125. Draw the rectifier circuit diagram when it is connected to a 100 N load, and find 1. The average value of the voltage across the load. 2. The average power dissipated by the load, and 3. The minimum PIV rating required for each diode.

The input voltage to a full-Wave rectifier employing a center-tapped step-down transformer and two silicon diodes is 220V rms, and the transformer has turns ratio n=0.125. Draw the rectifier circuit diagram when it is connected to a 100 N load, and find 1. The average value of the voltage across the load. 2. The average power dissipated by the load, and 3. The minimum PIV rating required for each diode.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter59: Motor Startup And Troubleshooting Basics

Section: Chapter Questions

Problem 12SQ: How is a solid-state diode tested? Explain.

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How is a solid-state diode tested? Explain.
1.) The voltage on Figure Q1 is connected across a 0.15 2 resistive load. Calculate the power dissipated in this resistor. 2.) A 12 V rms ac supply is connected to the primary winding of a transformer with a turns ratio of 0.052. Calculate the rms secondary voltage given a voltage regulation of 4.0% 3.)Sketch the circuit for an ac supply input to a full-wave diode rectifier with a resistive load and no smoothing capacitor.
QUESTION 2.. A load is connected in the Full Bridge rectifier circuit (Four Diodes). Usedtransformer primary voltage value is 220 V (rms). The transformer winding ratio is 1:10.Using the 0.7 V model of the diode,Load Rating: 7K OHM d) Find the effective value of the load voltage.e) Find the effective value of the load current.
3 Given the bridge-type full-wave rectifier circuit shown 220V 60Hz 220V:Es Es D1 D2 D3 D4 The load resistor is 220 and the transformer average current is 300mA. Determine: (a) Average value, RMS value, and frequency of load voltage VRL. (b) Average current and PIV of each diode. RL
a. Full-wave Bridge-type Rectifier. Consider the following circuit on the right. a.1 Determine the peak and dc output voltage for the bridge rectifier. a.2 Assuming the practical model, what PIV rating is required for the diodes? The transformer is specified to have a 12 V rms secondary voltage for the standard 120 V across the primary. D3 120 V pisec) RL Dz D 10 k) alll
2. A single-phase single-diode (half wave) rectifier is connected to a 240 V, 50 Hz AC supply. Neglecting the diode volt drop, derive the instantaneous load current equation, determine the current waveform, mean load voltage, and the mean load current for a load of a. Pure resistor of 5 Ohm b. An inductance of 0.1 H in series with 10 Ohm resistor. (clue : B= 265° or 14.72 ms)
A single-phase center-tapped rectifier has an R-L of R= 20 0, L = 50mH, and a 240 V ac 50 Hz source voltage. Determine: i. The average and rms currents of the diodes and the load. ii. The rms and average 50 Hz source currents. iii. The power absorbed by the load. iv. The supply power factor.
A load is connected in the Full Bridge rectifier circuit (Four Diodes). Usedtransformer primary voltage value is 220 V (rms). The transformer winding ratio is 1:10.Using the 0.7 V model of the diode,Load Rating: 7 K Ohmsa) How many % of conduction does each diode branch stay on?b) Find the average values of the load voltage.c) Find the average values of the load current.d) Find the effective value of the load voltage.e) Find the effective value of the load current.
(ii) Briefly explain the principle of operation of the rectifier circuit. Ensure to explain about the pair of diodes that conduct for the positive cycle and the pair that conducts for the negative cycle of the input signal. (iii) Suppose the input signal vs(t) is a sine wave with a peak voltage of 8 V and frequency of 50 Hz. Sketch the output signal across the load resistor R₂ with the expected peak voltage. Also state the ripple frequency beside the waveform. (iv) Explain why there is a short period between pulses when the output voltage is zero.
For a full wave controlled rectifier with pure resistive load (R=100),the supply voltage is (V-50Sin314t). When the firing angle (a =0%) determine the followings: 1) The mean (dc) value of the load current. 2) The RMS value of the load voltage.
In the single-phase diode rectifier circuit shown in Figure 1 and a constant dc load current Ia = 10A, calculate, if vs is a sinusoidal voltage with V, i. the average output voltage ii. rms values of input current and current through each diode 120 V at 60 Hz, iii. the average power supplied to the load.
1. The full-wave rectifier circuit shown in following Figure is to deliver 0.2 A and 12 V (peak values) to a load. The ripple voltage is to be limited to 0.25 V. The input signal is 120 V (rms) at 60 Hz. Assume diode cut-in voltages of 0.7 V. (a) Determine the required turns ratio of the transformer. (b) Find the required value of the capacitor. (c) What is the PIV rating of the diode? vo D2