Table of Contents
- 1 What is separately excited motor?
- 2 What is meant by self excited motor?
- 3 What is speed control of separately excited DC motor?
- 4 What are the disadvantage of separately excited dc motor?
- 5 How does a self-excited alternator work?
- 6 What is the difference between self-excited and separately excited generator?
- 7 What is the difference between self exited and separately excited field winding?
What is separately excited motor?
A separately excited dc motor is a motor whose field circuit is supplied from a separate constant-voltage power supply, while a shunt dc motor is a motor whose field circuit gets its power directly across the armature terminals of the motor. Hence, the motor speed will slow down.
What is meant by self excited motor?
Self Excited DC Motor. In case of self excited DC motor, the field winding is connected either in series or in parallel or partly in series, partly in parallel to the armature winding. Based on this, self excited DC Motors can be classified as: Shunt wound DC motor.
What is speed control of separately excited DC motor?
The speed of separately excited dc motor can be control by changing the armature voltage and changing field flux. Due to this the speed can be controlled for below rated speed and speed above the rated speed, respectively. The Armature voltage can be controlled by Using IGBT based chopper.
What is the meaning of self excited?
Definition of self-excited : excited by a current produced by the generator itself self-excited generators.
What is the disadvantage of separately excited compare to self excited?
Separately excited DC generators have many advantages over self-excited DC generators. It can operate in stable condition with any field excitation and gives wide range of output voltage. The main disadvantage of these kinds of generators is that it is very expensive of providing a separate excitation source.
What are the disadvantage of separately excited dc motor?
The disadvantage of a separately excited DC generator is the same that we require an external DC source for excitation. But since the output voltage may be controlled more easily and over a wide range (from zero to a maximum), this type of excitation finds many applications.
How does a self-excited alternator work?
A self-excited brushless alternator having a rotating field excited by an alternating current exciter whose armature rotates with the field winding of the alternator and is permanently connected to that winding by a rotating field rectifier.
What is the difference between self-excited and separately excited generator?
Self-excited generator: In a self-excited generator the field winding is excited by an external DC source like a battery etc. Separately excited generator: In a separately excited generator the field poles have some residual magnetism. When the armature is rotated a small emf is induced in it.
How does a separately excited DC motor work?
A separately excited DC motor has field and armature windings connected to two different sources. So, field and armature windings remain seperated. Speed in DC MOTOR is inversly proportional to field flux.
What is the difference between a self-excited motor and shunt motor?
The main difference between the Separately excited motor and the shunt motor is the field cct where as in the second it has its own voltage supply.AnswerI think you mean ‘generator’, not ‘motor’. A ‘self-excited’ motor is one in which the output supplies the field current, as well as the load current.
What is the difference between self exited and separately excited field winding?
Self Exited:In these machines, instead of a separate voltage source, the field winding is connected across the main voltage terminals. Separately Excited: In this type of Excitation field winding is excited through a separated DC source.With the help of Separate DC source field winding are energized and produces the magnetic flux.