How does a separately excited dc motor work?

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.

What is separately excited DC?

A separately excited DC generator is the one whose field winding is supplied by an independent external DC source (like a battery). The magnitude of generated voltage depends upon the speed of rotation of armature and the field current, i.e., greater the speed and the field current, higher is the generated voltage.

How do you control a 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.

What is separate excitation?

Definition of separately excited : having the field magnets excited by a current from a separate source —used of a machine.

What is a separately excited DC motor?

A separately excited DC motor includes some field coils similar to that of shunt-wound type. The name shows the structure of this type of motor. Typically, in other DC motors, the armature coil and the field coil are both powered from a single source.

How to change the torque of an excited DC motor?

From the torque equation of motors, we know that: So, the torque, in this case, can be changed by modifying the field flux (φ), independent of the current of the armature (I a ). The figure below presents the separately excited DC motor.

What are the components of a DC series motor?

Components used in DC Series Motor The components of this motor mainly include the rotor (the armature), commutator, stator, axle, field windings, and brushes. The fixed component of the motor is the stator, and it is built with two otherwise more electromagnet pole parts.

What are the different types of self-excited motors?

Similarly, self-excited motors classified into three types namely DC series motor, DC shunt motor, and DC compound motor. This article discusses an overview of the series motor, and the main function of this motor is to convert electrical energy to mechanical energy.