• Home
  • Basics
  • Electrical Circuits
  • Power Systems
  • Power Electronics
  • MCQ

WatElectrical.com

Electricals Made Easy

You are here: Home / Electrical Circuits / Know the Differences between DC Shunt Motor & DC Shunt Generator

Know the Differences between DC Shunt Motor & DC Shunt Generator

August 17, 2020 By Wat Electrical

In the scope of electrical technology, a parallel circuit is described to be shunt. Direct current motors and generators where the armature and field windings are parallelly connected are termed as DC shunt motors and DC shunt generators. Fundamentally, a similar machine can be utilized as motors and generators. The foremost variation in between these devices is that in the DC shunt motor the input is of electrical energy and the output is mechanical energy whereas it is vice-versa in the DC shunt generator.

General Overview of DC Shunt Motor & DC Shunt Generator

The general overview of these motors is discussed below.

DC Shunt Motor

The DC shunt motor is also termed as Shunt wound DC motor and it comes under the classification of self-excited DC motor where the armature winding and field windings are in parallel connection. As there is a parallel connection between the windings, they are subjected to a similar supply voltage.

DC Shunt Generator

This comes under the classification of a self-excited DC generator where the armature winding and field windings are in parallel connection. There will be minimal current across field winding because it is wounded with slender wire and has a greater number of turns.

EMF Equations

When a certain voltage is applied to the DC shunt motor, the armature collects the necessary amount of current required to develop a potent magnetic field where this will get related to the magnetic field developed by the shunt windings and this causes rotation of the armature. This armature rotation generates back EMF and this resists the armature voltage and lessens the armature current. When the load across the motor gets increased, then the rotation of the armature will be slowed down and also back EMF will be decreased as EMF is linear to speed.

DC Shunt Motor

DC Shunt Motor

Eb = (Ф.P.Z.N)/60

Where ‘Eb’ corresponds to back EMF

‘Ф’ corresponds to magnetic flux

‘P and Z’ is the number of poles and coils

‘N’ is the speed of rotation

When Eb voltage is reduced and with a linear supply voltage level, then the net voltage will get increased. So,


Enet = E – Eb

When Enet is increased, then the armature current value also will be increased. As torque value is linear to that of armature current, torque value also enhances.

T = (Ф.P.Iarm.Z)/2.∏.A

Where ‘T’ is the torque developed and ‘A’ is the cross-sectional area

In the end, the developed torque permits the motor to enhance the speed of rotation and balance at the time of loading.

2. In the DC shunt generator, armature current is represented as:

DC Shunt Generator

DC Shunt Generator

Iarm = Ifield + ILine

And the EMF equation is given as

E = (Ф.P.Z.N)/60A

Where ‘E’ corresponds developed EMF

‘Ф’ is the magnetic flux

‘P and Z’ are number of poles and coils

‘N’ is the speed of rotation in rpm

‘A’ corresponds to the number of parallel paths

and Iarm, Ifield, ILine are armature, field, and line currents.

ILine = Ishunt = V/Rshunt

The induced EMF is:

E = V + IarmRarm = V+ (Ishunt + ILine) Rarm

Comparisons between DC Shunt Motor & DC Shunt Generator

Feature

DC Motor

DC Generator

Input and OutputHere, the input is DC current and output is mechanical energyHere, the input is mechanical energy and output is DC current
EMFCoil uses EMF and used for axle rotationThe EMF generated across the coil is transferred to the load
TypesCompound wound and ShuntSeries wound, compound, and Shunt
Rule of operationOperation is dependent on Fleming’s left-hand conceptOperation is dependent on Fleming’s right-hand concept
Back EMFEb = V – IarmRarmEb = V + IarmRarm
Effect of commutationFor modifying the polarity of the magnetic field, commutators are utilized in motorsFor canceling the polarity effect, generators are utilized in motors
The relation between EMF and the terminal voltageArmature EMF is less than that of terminal voltage (Eb < V)Generated EMF is more than that of terminal voltage (Eb > V)

Please refer to this link to know more about DC Generator MCQs, Linear Induction Motor MCQs.

FAQs

1). Where shunt motors are used?

These are utilized when linear speed is necessary and when starting circumstances are not difficult.

2). What are the applications of DC shunt generator?

These are used for lighting, charging of the battery, portable generators, and many others.

3). What are the applications of DC shunt motor?

These are used in conveyors, dynamic braking, reversing applications, and in many of the industrial purposes.

4). What is the difference between shunt and series motor?

Shunt motors have parallel winding and have minimal current values whereas series motors have series winding and so field current and armature currents are similar.

So, this article shows a basic overview and the differences that exist between DC shunt motor & DC shunt generator. Also, know more about the concepts like how the working of the shunt generator and shunt motor varies and their related concepts?

Filed Under: Electrical Circuits, Electrical Machines, Power Electronics Tagged With: Generator, Motor

SEARCH HERE!

Recent Posts

  • Shaded Pole Motor : Construction, Working, Circuit, Characteristics & Its Applications
  • Induction Generator : Construction, Working, Circuit, Types, Differences & Its Applications
  • Squirrel Cage Induction Motor : Construction, Working, Types, Differences & Its Applications
  • Proximity Effect : Working, Affecting Factors, Differences, Advantages, Disadvantages & Its Applications
  • Solid State Relay : Block Diagram, Circuit, Working, Types, Differences & Its Applications
  • Cycloconverter : Circuit, Working, Types, Control Strategies, Characteristics & Its Applications
  • Electric Flux : Formula, Types, Properties, Different Surfaces & Its Applications
  • Capacitor Start Motor : Circuit, Working, Phasor Diagram, Characteristics, Advantages & Its Applications
  • Electrical Hazard : Causes, Types, Do’S and Dont’S, Examples & Control Measures
  • Earth Leakage Circuit Breaker : Circuit, Working, Types, Differences, Advantages & Its Applications

Categories

  • Basics
  • Electrical
  • Electrical Circuits
  • Electrical Machines
  • Electrical Measurements
  • Electrical Projects
  • Electromagnetic Fields
  • Power Electronics
  • Power Plant
  • Power Systems

Copyright © 2025 · WatElectrical.com | Contact Us | Privacy Policy