Question 1 In a single-phase full-wave bridge uncontrolled rectifier, the diodes have a reverse recovery time of 40 μs. If the ac input voltage is 230V, determine the effect of reverse recovery time on the average output voltage for a supply frequency of (a) 50 Hz and (b) 2.5 kHz. [20Marks] Question 2 A heavily inductive load of R = 5 Q is to be supplied with a DC voltage of 200 V, using three- phase bridge rectifier. Calculate: (a) The DC load current. (b) The RMS current of any diode. (c) The transformer secondary phase current. (d) The transformer secondary line voltage. (e) PRV of any diode. {20Marks] Question 3 The single-phase full-wave controlled bridge rectifier has an AC input of 120 V at 60 Hz and a 5 Q load resistor. The delay angle is 40°. Determine the average current in the load. [10Marks]

Question 1 In a single-phase full-wave bridge uncontrolled rectifier, the diodes have a reverse recovery time of 40 μs. If the ac input voltage is 230V, determine the effect of reverse recovery time on the average output voltage for a supply frequency of (a) 50 Hz and (b) 2.5 kHz. [20Marks] Question 2 A heavily inductive load of R = 5 Q is to be supplied with a DC voltage of 200 V, using three- phase bridge rectifier. Calculate: (a) The DC load current. (b) The RMS current of any diode. (c) The transformer secondary phase current. (d) The transformer secondary line voltage. (e) PRV of any diode. {20Marks] Question 3 The single-phase full-wave controlled bridge rectifier has an AC input of 120 V at 60 Hz and a 5 Q load resistor. The delay angle is 40°. Determine the average current in the load. [10Marks]

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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