Questions:- 1. What is the basic different between the internal characteristics and the external characteristics of d.c shunt generator? 2. For which reasons its not possible to develop rated voltage of d.c shunt generator, both in unloaded and loaded conditions? 3- What are the reasons of fall of terminal voltage of a d.c. shunt generator?

Questions:- 1. What is the basic different between the internal characteristics and the external characteristics of d.c shunt generator? 2. For which reasons its not possible to develop rated voltage of d.c shunt generator, both in unloaded and loaded conditions? 3- What are the reasons of fall of terminal voltage of a d.c. shunt generator?

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter57: Dc Variable-speed Control-motor Drives

Section: Chapter Questions

Problem 8SQ

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Q: For which reasons its not possible to develop rated voltage of d.c shunt generator, both in unloaded and loaded conditions?
1. How does loading of the Generator affect the Generator’s Terminal Voltage (VT) and Load Current (IL)?2. Write down the Voltage equation of a Separately excited DC Generator.3. What is the reason for drop in Generator’s Terminal voltage, from No load to Full load?
What are the reasons for the drop in terminal voltage of self excited shunt generator When loaded?
1. How does loading of the Generator affect the Generator’s Terminal Voltage (VT) and Load Current (IL)?
How can we keep terminal voltage at constant level even when the load is gradually increases in shunt DC generator?
Which of the following factor is responsible for negative voltage regulation of a DC generator? Under compunding Over compounding Flat compounding Critical resistance
Explain the characteristics of the series and compound DC generator under no-load to loaded conditions.
4. Why is the fall in the terminal voltage for the external characteristic greater in shunt generator than in separately – excited generator?
21- Draw the circuit diagram of self excited DC compound long shunt generator, mark all current and voltages and write the necessary equations. write any two applications for DC series generator.
Why should the terminal voltage drop more in the case of shunt generator than in the case of separately excited generator as the load current is increased ?
Explain the external characteristis of a shunt generator and state the reasonsfor the drop in its terminal voltage when under a load.
4. A 6 pole wave wound shunt generator delivers 200A at a terminal voltage of 240V. Ra and Rsh are 0.03Ω and 70Ω respectively. Neglecting brush drop, determine (i) armature current (ii) current per parallel path (iii) generated voltage and (iv) Power developed. armature current ? current per parallel path ? generated voltage ? Power developed ?