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Anvesh Sameer

This course deals with the generation of DC voltage, construction of DC machine, armature windings, series, shunt wounded machines, characteristics, applications and in-depth analysis of all concepts using real-time pictures of machine components

GATE (Graduate Aptitude Test in Engineering) 2020 & 2021 complete preparation with best educators. Know about the detailed syllabus, best books, exam pattern and dates, previous year question papers a

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English

The Ultimate Guide to DC Machines: GATE (EE)

D.C. Machines

Electric Machines

Electrical Engineering

GATE & ESE - EE, EC

GATE, ESE and IIT-JAM

Ace the toughest competitive and government exams in India 

Test Preparation

Overview of the DC machines course is discussed

Overview of the Course

Working Principle of DC Machine

Construction of yoke, pole shoe, pole core, armature, rotor laminations, commutator, brushes is discussed in this lesson

Constructional features of DC Machines

Emf equation of DC generator is explained in detail

EMF Equation

Lap winding, wave winding, applications of these windings are also discussed in detail with diagrams

Lap winding and Wave Winding - 1

Technical differences between Lap winding and wave winding are discussed in detail with good examples .
This lecture also involves finding the Armature resistance of a DC machine when connected in lap winding as well as wave winding.

Lap winding and wave winding part 2

Armature Reaction

Methods to neutralize armature Reaction in DC machine using the Compensating windings and interpoles are explained in detail with diagrams.

Neutralizing Armature Reaction

Effect of brush shift is explained in simple words

Effect of brush shift

Commutation process of DC machines is explained in detail using clear diagrams

Commutation

Effect of delayed commutation in DC machines is discussed from GATE point of view

Delayed commutation

Methods to improve commutation are discussed

Methods to improve commutation

Types of DC machines and separately excited DC generator is discussed

Types of DC machines

Shunt excited generator is explained with an example problem

Shunt excited DC generator

Series excited DC generator is discussed with neat diagrams and derived important equations.

Series excited DC generator

Long shunt compound , short shunt compound, cumulative compound and differential compound DC generators are explained with neat diagrams and important equations are derived from the circuit itself in simple way.

Compound excited DC generator

4 problems are solved and explained in detail. 1 problem is left to audience for practice.

MCQs on Types of DC machines

Why should I study no load characteristics?
What is their importance in generators? What are the key points in OCC?
These questions are discussed with detailed explanation.

No load characteristics

Critical resistance

Voltage build-up in DC generator

External characteristics

Applications of DC Shunt generators, external characteristics of shunt Generator are discussed with detailed explanation

Shunt Generator - External characteristics

Complete Concept regarding the Characteristics of series generator is explained through diagrams.
1) learn completely about generator characteristics under 15 minutes
2) learn how to draw the open circuit characteristics of DC Series generator
3) Internal characteristics of DC generator
4) external characteristics of DC generator
5) comparison of series and shunt Generator characteristics
6) comparison of different characteristics of DC series generator
7)key points regarding Series generator

SERIES generator - Characteristics

How to convert a cumulative machine into a differential machine?
What do we call a long shunt cumulative generator when we operate it as a motor?
Many questions related to this concept are solved in this discussion with neat explanations using diagrams.

How to change type of compounding

Importance of field windings in the production of EMF are discussed with detailed explanation.

Role of field windings in EMF generation

Characteristics of all compound generators are discussed with neat diagrams and important examples are discussed

Compound Generator characteristics and its comparison with other Generators

Voltage Regulation

#Gate Ranker # Mtech from JEC Jabalpur. use code " MACHINE20" to attend my Classes. I don't teach "I simply explain the topic."

Ravendra Yadav

In this course we will be discussing about the various speed control methods of induction machines like rotor resistance control,  frequency control,  input voltage control etc.

(Hindi) Learn the Speed Control Methods of Induction Machines

Faculty of GATE/ESE (Electrical Engineering) , Expertise in Electrical Core | Jony Ive Award Winner 2018 | Use code “PAWANCLIVE” to join

Pawan Chandani

In this course Pawan will discuss PYQs and expected MCQs based on DC Machine.

(Hindi) Part 1 - PYQs Based on DC Machine

In this course we are discussing about the various different types of questions from DC Machines for practice point of view.

(Hindi) Practice Session on DC Machines - GATE(Electrical)

In this course we will be discussing about the Construction of DC Machine including all its important parts.

(Hindi) Know Every Concept About Construction of DC Machine

In this course, the educator is discussing very important Previous Year MCQs for ESE Point of view.

(Hindi) Complete Course on ESE Previous Year MCQs

In this course, we will be discussing the core concepts of the machine which is very important for the upcoming ESE exam point of view.

Lessons

27 lessons • 5h 48m

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Overview of the Course

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Working Principle of DC Machine

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Constructional features of DC Machines

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EMF Equation

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Lap winding and Wave Winding - 1

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Lap winding and wave winding part 2

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Armature Reaction

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Neutralizing Armature Reaction

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Effect of brush shift

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Commutation

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