AC Rotating Machines
Subject and UNIT: Electrical and Instrumentation Engineering: Unit III: AC Rotating Machines
The three phase induction motor is generally treated as a rotating transformer. The transformer has two winding - one is primary and another one secondary winding.
Induction Motor
Subject and UNIT: Electrical and Instrumentation Engineering: Unit III: AC Rotating Machines
If an balanced 3 phase voltage is applied to a balanced 3 phase winding, it produces rotating magnetic field of constant amplitude.
Subject and UNIT: Electrical and Instrumentation Engineering: Unit III: AC Rotating Machines
Difference between the Slip Ring or Phase Wound Induction Motor and Squirrel Cage Induction Motor
with Diagram, Advantages
Subject and UNIT: Electrical and Instrumentation Engineering: Unit III: AC Rotating Machines
he rotor of the squirrel cage three phase induction motor is cylindrical in shape and have slots on its periphery. The slots are not made parallel to each other but are bit skewed (skewing is not shown in the figure of squirrel cage rotor beside)
Subject and UNIT: Electrical and Instrumentation Engineering: Unit III: AC Rotating Machines
An electrical motor is such an electromechanical device which converts electrical energy into a mechanical energy. This Motor consists of two major parts: i. Stator ii. Rotor.
Subject and UNIT: Electrical and Instrumentation Engineering: Unit III: AC Rotating Machines
Induction Motors are the most commonly used motors in many applications. These are also called as Asynchronous Motors, because an induction motor always runs at a speed lower than synchronous speed. Synchronous speed means the speed of the rotating magnetic field in the stator.
DC Machines | Electrical and Instrumentation Engineering
Subject and UNIT: Electrical and Instrumentation Engineering: Unit II: DC Machines
Short questions with answers and important five mark questions.
Subject and UNIT: Electrical and Instrumentation Engineering: Unit II: DC Machines
Solved problems of DC Machines
Subject and UNIT: Electrical and Instrumentation Engineering: Unit II: DC Machines
Generally, the DC machines are used in supplying excitation of an alternator and it is also used in many applications like welding process, variable-speed motor drives and electrolytic and electroplating process.
Construction, Working Principle, Types, Characteristics, Advantages, Disadvantages
Subject and UNIT: Electrical and Instrumentation Engineering: Unit II: DC Machines
Brushless DC Motor may be described as electronically commuted motor which do not have brushes. These types of motors are highly efficient in producing large amount of torque over a vast speed range.
Construction, Working Principle, Characteristics, Types, Advantages, Applications
Subject and UNIT: Electrical and Instrumentation Engineering: Unit II: DC Machines
Step Motors (often referred as stepper motors) are different from all other types of electrical drives in the sense that they operate on discrete control pulses received and rotate in discrete steps.
Construction, Working Principle, Characteristics, Applications, Types
Subject and UNIT: Electrical and Instrumentation Engineering: Unit II: DC Machines
A universal motor is a special type of motor which is designed to run on either DC or phase AC supply. These motors are generally series wound (armature and field winding are in series), so it produce high starting torque.