Concept explainers
What characteristic of wound rotor motors led to their wide use for industrial applications?
State the characteristics of wound rotor motors that led to the wide use for industrial applications.
Answer to Problem 1SQ
The speed or torque control characteristics of wound rotor motors are led to the wide use for industrial applications.
Explanation of Solution
The wound rotor motor is the first AC motor provided with the speed control characteristics. The wound rotor motor is widely used in industrial power applications since it provides the wide range of speed control. In addition, wound rotor motor has features of high-starting torque and low-starting current. These features are highly necessary to provide the motor better operating characteristics to use for applications where a large motor is required or where the motor must start with load connection.
Conclusion:
Thus, the speed or torque control characteristics of wound rotor motors are led to the wide use for industrial applications.
Want to see more full solutions like this?
Chapter 34 Solutions
Electric Motor Control
- 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.arrow_forwardCalculate the power developed by the armature if the armature current is 25.5 A, neglecting the brush drop of a 200 V DC motor that has an armature resistance of 0.45 ohm, a shunt field resistance of 165 ohms and a series field resistance of 4.5 ohms. This machine is connected as a short shunt compound motor to a 200 V mains.arrow_forwardExplain in detail the Starting of Induction Motorsarrow_forward
- A shunt dc motor has armature voltage = 150 V, armature field resistance = 100 Q, and armature resistance = 1.6 Q. At a certain torque the motor rotates at 1350 R.P.M and takes a current = 12 A. what will be the load %3D %3D %3D torque?arrow_forwardName and briefly discuss the types of power loss in a shunt-connected dc motor.arrow_forwardThe armature of a 8 pole DC motor carries 314 conductors which are lap connected . For an armature current of 20 A, the torque produced has to be 50N-m. Determine the required flux per polearrow_forward
- How do you define ‘back emf’ and speed regulation of a dc motor. Can you explain analytically what happens to the torque and speed of a motor when the flux is varied?arrow_forwardI.What is the effect of load on the efficiency of an induction motor? II. Explain the term air-gap power or power developed in the rotor and shaft power. How these terms are related to each other? III. Derive an expression for the rotor copper loss in terms of slip and input to the rotor? IV. What are the various losses in an induction motor? On what factors do they depend? V. List the different types of stray load losses in an induction motor.arrow_forwardA 240 V, DC series motor takes 44 A, the armature and field resistances are 0.8 Q and 0.05 Q respectively, the back e.m.f of the motor is ..arrow_forward