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- DC motors are often used as the main actuator within control andmechatronics systems.a) Explain why DC motors are so common in this field of engineering, what are their advantages and disadvantages?b) Often DC motors are required to operate in both forward and reverse directions. Explain using sketches how this functionality can be achieved.Briefly explain the construction and operation of a DC Shunt motor.Discuss the V/F=constant control method of electric motors.
- (TRUE OR FALSE) - Energy conversion of DC generator is based on the principle ofproduction of dynamically terminal voltage. - Increasing the speed of DC motor, the back emf will decrease but theline current falls. - The current drawn by the armature of DC motor is directly proportionalto torque.The permanent magnet machines (PMM) known as "Brushless Permanent Magnet Motors", "Brushless DC Motors" and as "Permanent Magnet Synchronous Motors", are they meant the same thing? If there a difference, then what is it? Explain that clearly and in details.Explain theory of a separately excited DC motor.
- A 110V shunt generator has a full load current of 100A, shunt field resistance of 55 ohms and constant losses of 500W. If full load efficiency is 88%, find the armature resistance. Assuming voltage to be constant at 110V, calculate the efficiency at half load. Find the load current.3.Give the significance of Back emf in dc motor, What is the role of starter in motors? How the torque gets developed in the dc motor? Derive its relation.Discuss how the speed will change if field current is decreased in a shunt dc motor.
- ELECTRICAL MACHINES 2 Describe the difference in construction operation of dc shunt, series, and compound motor. Compare the speed characteristics of dc shunt, series, and compound motor.Electrical Engineering. Explain briefly in one sentence how do we maximize the value of the armature currentin a shunt dc motor in the event of increase load, maintaining the input power supply thesame?Name the major parts of a DC motor