o, -V 1 D. DC Load a Fig.2: Fully controlled single phase thyristor bridge rectifier 3. We wish to charge a 120V battery

[answerhappygod]

O V 1 D Dc Load A Fig 2 Fully Controlled Single Phase Thyristor Bridge Rectifier 3 We Wish To Charge A 120v Battery 1 (58.53 KiB) Viewed 31 times

o, -V 1 D. DC Load a Fig.2: Fully controlled single phase thyristor bridge rectifier 3. We wish to charge a 120V battery from a 600V DC source using a DC chopper. The average current should be 20A, with peak-to-peak ripple of 2A. If the chopper frequency is 200Hz. calculate the following a The DC current drawn from the source The DC current in the diode c. The on time, T. d. The inductance required to achieve the required ripple 4. DC-to-DC converters are widely used in industrial and consumer applications. Discuss the impact that switching frequency, switching times and inductor core losses have on the efficiency of switch mode regulators b. Give an illustrated analysis (draw all relevant waveforms to support your analysis) of the operation of a buck converter. Also derive an equation relating output and input voltages by using inductor voltage and current changes during the on & off periods. e. Derive formulae for inductor and capacitor values which are used to filter high frequency harmonics in DC to DC buck converters d. Design a buck converter that can generate an output voltage of 12V with a ripple voltage of less than 1%, input voltage of 120V & a load resistor of 50. Design for continuous current operation at a frequency of 50 kHz. Give the duty ratio of the circuit, the voltages that must be blocked by the switch diode and the sizes of the filter components used with their respective ratings. Assume all components used are ideal 5. A buck converter circuit is to generate a LOV DC signal from a 24V DC input. Determine the sizes and ratings of the filter components required if the circuit is to provide a power of LOW across the resistor load R. The circuit is required to operate at an operating frequency of 100 kHz with a ripple voltage which is equivalent to or less than 0.1%. Ignore the voltage drops across the diodes and the switch and assume continuous inductor current operation 6. Many applications require step-up converters a. Sketch a clearly labelled equivalent circuit of a step-up (boost) converter b. For the step-up converter in 6(a): i. Describe the operation of the converter, clearly identifying the role each of the main components play in the circuit. Draw waveforms of currents through- and voltages across the different components to illustrate your answer ii. Derive an equation relating output and input voltages by using inductor voltage and current changes during the on&off periods. A boost converter is to be used to generate a 36V auxiliary supply rail from a 12V rail across a load R500. The circuit is required to operate at 25 kHz with a peak to peak voltage ripple of less than 0.1% at the output. Find the values of the filter components required and verify it is designed for continuous inductor current operation