Electrical Machines Tutorial
Selected Reading
- Electrical Machines - Discussion
- Electrical Machines - Resources
- Electrical Machines - Quick Guide
- Power Developed by Synchronous Motor
- Equivalent Circuit and Power Factor of Synchronous Motor
- Working of 3-Phase Synchronous Motor
- Losses and Efficiency of 3-Phase Alternator
- Output Power of 3-Phase Alternator
- Armature Reaction in Synchronous Machines
- Working of 3-Phase Alternator
- Construction of Synchronous Machine
- Introduction to 3-Phase Synchronous Machines
- Methods of Starting 3-Phase Induction Motors
- Speed Regulation and Speed Control
- Characteristics of 3-Phase Induction Motor
- Three-Phase Induction Motor on Load
- Construction of Three-Phase Induction Motor
- Three-Phase Induction Motor
- Single-Phase Induction Motor
- Introduction to Induction Motor
- Applications of DC Machines
- Losses in DC Machines
- Types of DC Motors
- Back EMF in DC Motor
- Working Principle of DC Motor
- Types of DC Generators
- EMF Equation of DC Generator
- Working Principle of DC Generator
- Types of DC Machines
- Construction of DC Machines
- Types of Transformers
- Three-Phase Transformer
- Efficiency of Transformer
- Losses in a Transformer
- Transformer on DC
- Ideal and Practical Transformers
- Turns Ratio and Voltage Transformation Ratio
- EMF Equation of Transformer
- Construction of Transformer
- Electrical Transformer
- Fleming’s Left Hand and Right Hand Rules
- Concept of Induced EMF
- Faraday’s Laws of Electromagnetic Induction
- Rotating Electrical Machines
- Singly-Excited and Doubly Excited Systems
- Energy Stored in a Magnetic Field
- Electromechanical Energy Conversion
- Electrical Machines - Home
Selected Reading
- Who is Who
- Computer Glossary
- HR Interview Questions
- Effective Resume Writing
- Questions and Answers
- UPSC IAS Exams Notes
Applications of DC Machines
Apppcations of DC Machines
At present, a large amount of electrical energy is generated in the form of alternating current. Consequently, the use of DC machines (motors or generators) has become pmited. However, dc machines are still used in several apppcations pke for supplying excitation systems of alternators, in electrolytic processes, welding processes, etc.
Apppcations of DC Generators
The apppcations of different kinds of DC generators are psted below −
Separately-Excited DC Generator
Generators are mainly used in laboratories for experiments and testing purposes.
They are also used as a source of DC power for supplying DC motors.
Series DC Generator
Series DC generators are used in DC locomotives for regenerative braking for supplying field excitation current.
Series DC generators are also used as a booster in distribution systems.
Differentially compounded series generators are used for arc welding.
Over compounded cumulative series generators are used for pghting and heavy power supppes.
Flat compounded series generators are used for supplying power to offices, houses, and the other commercial buildings.
Shunt DC Generator
Shunt DC generators are mainly used for pghting purposes.
Shunt DC generators are used for charging batteries.
These generators are also used for supplying field excitation current to alternators.
Apppcations of DC Motors
The apppcations of different types of DC motors are given below −
Series DC Motor
Series DC motors are used in apppcations where high starting torque is required.
Series DC motors are used in cranes and hoists.
Series DC motors are used in electric tractions.
They are used in air compressors.
They are also used in vacuum cleaners.
Series DC motors are also used in sewing machines, etc.
Shunt DC Motor
Shunt DC motors are used in apppcations that require constant speed.
Shunt DC motors are used for driving lathe machines.
These are also used in centrifugal pumps and blowers.
These are used in fans, conveyors, and spinning machines.
These DC motors are also used in pfts.
Compound DC Motor
Compound DC motors are used in those apppcations which require high starting torque and constant speed.
Used in printing presses.
They are also used in shears.
They are used in elevators and pfts.
Compound DC motors are also used in rolpng mills and heavy planners, etc.