NED UNIVERSITY OF ENGINEERING AND TECHNOLOGY,
PAKISTAN
SUBJECT: MECHATRONIC SYSTEM DESIGN
ASSIGNMENT TOPIC: ELECTRICAL MOTORS
ELECTRICAL MOTORS
DC Shunt Motor
Seprately Excited motor
Series motor
PMDC Motor
DC motors
Compound Motor
Induction Motor
Synchronous Motor
AC motors
Stepper Motor
Brushless Motor
Hysterisis Motor
Reluctance Motor
Other motors Universal Motor
.
DC SHUNT MOTOR
A DC shunt motor is a type of self-excited DC motor, and it is also known
as a shunt wound DC motor. The field windings in this motor can be
connected in parallel to the armature winding. So both windings of this
,motor will expose to the equal voltage power supply, and this motor
maintains an invariable speed with any kind of load. This motor has a low
starting torque and also runs at a constant speed.
Construction and Working Principle
The DC shunt motor construction is the same as any type of DC motor.
This motor can be constructed with the basic parts like field windings
(stator), a commutator and an armature (rotor).
The working principle of a DC Shunt Motor is, whenever a DC motor is
turned ON, then DC flows throughout stator as well as the rotor. This
current flow will generate two fields namely pole as well as the armature.
In the air gap between armature and field shoes, there are two magnetic
fields, and they will respond with each other for revolving the armature.
The commutator overturns the armature current flow direction at
ordinary gaps. So the armature field is repelled with pole field for all
time, it keeps revolving the armature within the equal direction.
DC-Shunt Motor Circuit Diagram
The DC shunt motor circuit diagram is shown below, and the flow of
current and voltage being supplied to the motor from the supply can be
given by Itotal & E.
, DC Shunt Motor Circuit Diagram
In case of the shunt wound DC motor, this current supply will divide into
two ways like Ia,& Ish, where ‘Ia’ will supply throughout the ‘Ra’
resistance armature winding. In the same way, ‘Ish’ will supply through
the ‘Rsh’ resistance field winding.
Therefore, we can write it as Itotal = Ia + Ish
We know that Ish = E/ Rsh
Otherwise Ia = Itotal- Ish= E/Ra
Generally, when the DC motor is in running state & the voltage supply
voltage is stable and the shunt field current given by
Ish = E/Rsh
But we know that the armature current is proportional to the field
flux (Ish ∝ Φ). Thus the Φ remains more otherwise less stable, due to this
reason; a shunt wound DC motor can be named as a constant flux motor.
DC Shunt Motor Applications
The applications of shunt DC motor include the following.
These motors are used wherever stable speed is required.
This kind of DC motor can be used in Centrifugal Pumps, Lifts, Weaving
Machine, Lathe Machines, Blowers, Fans, Conveyors, Spinning machines,
etc.
PAKISTAN
SUBJECT: MECHATRONIC SYSTEM DESIGN
ASSIGNMENT TOPIC: ELECTRICAL MOTORS
ELECTRICAL MOTORS
DC Shunt Motor
Seprately Excited motor
Series motor
PMDC Motor
DC motors
Compound Motor
Induction Motor
Synchronous Motor
AC motors
Stepper Motor
Brushless Motor
Hysterisis Motor
Reluctance Motor
Other motors Universal Motor
.
DC SHUNT MOTOR
A DC shunt motor is a type of self-excited DC motor, and it is also known
as a shunt wound DC motor. The field windings in this motor can be
connected in parallel to the armature winding. So both windings of this
,motor will expose to the equal voltage power supply, and this motor
maintains an invariable speed with any kind of load. This motor has a low
starting torque and also runs at a constant speed.
Construction and Working Principle
The DC shunt motor construction is the same as any type of DC motor.
This motor can be constructed with the basic parts like field windings
(stator), a commutator and an armature (rotor).
The working principle of a DC Shunt Motor is, whenever a DC motor is
turned ON, then DC flows throughout stator as well as the rotor. This
current flow will generate two fields namely pole as well as the armature.
In the air gap between armature and field shoes, there are two magnetic
fields, and they will respond with each other for revolving the armature.
The commutator overturns the armature current flow direction at
ordinary gaps. So the armature field is repelled with pole field for all
time, it keeps revolving the armature within the equal direction.
DC-Shunt Motor Circuit Diagram
The DC shunt motor circuit diagram is shown below, and the flow of
current and voltage being supplied to the motor from the supply can be
given by Itotal & E.
, DC Shunt Motor Circuit Diagram
In case of the shunt wound DC motor, this current supply will divide into
two ways like Ia,& Ish, where ‘Ia’ will supply throughout the ‘Ra’
resistance armature winding. In the same way, ‘Ish’ will supply through
the ‘Rsh’ resistance field winding.
Therefore, we can write it as Itotal = Ia + Ish
We know that Ish = E/ Rsh
Otherwise Ia = Itotal- Ish= E/Ra
Generally, when the DC motor is in running state & the voltage supply
voltage is stable and the shunt field current given by
Ish = E/Rsh
But we know that the armature current is proportional to the field
flux (Ish ∝ Φ). Thus the Φ remains more otherwise less stable, due to this
reason; a shunt wound DC motor can be named as a constant flux motor.
DC Shunt Motor Applications
The applications of shunt DC motor include the following.
These motors are used wherever stable speed is required.
This kind of DC motor can be used in Centrifugal Pumps, Lifts, Weaving
Machine, Lathe Machines, Blowers, Fans, Conveyors, Spinning machines,
etc.
