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PresentationECE

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bhinav wivedi

The document discusses electric motors and their basic components and classifications. It explains that electric motors convert electrical energy to mechanical energy using the interaction between a magnetic field and a current-carrying conductor. Motors are classified as alternating current or direct current based on their power supply. Direct current motors can be easily controlled but require brushes that wear out over time. The key components of a motor are identified as the stator, rotor, bearings, housing, and commutator. Smallest motors are found in watches while largest are used for ship propulsion.

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ECE131 BASIC ELECTRICAL AND ELECTRONICS ENGINEERING By : Section: K-1613 Roll Number Name Registration Number 41 Abhinav Dwivedi 11606717
AnElectricmotorisa machinewhichconvertselectric energyintomechanicalenergy.Itsactionisbasedonthe principlethatwhena current-carryingconductorisplacedina magneticfield,it experiencesa mechanicalforcewhose directionis givenby FlemingsLeft-handRuleandwhose magnitudeisgivenby F = BIlNewton.
PresentationECE
Used to turn fans, pumps and compressors Facilitate the circulation of air, water, refrigerant and other fluids Motors are designed for particular applications The correct motor must always be used Most motors operate on similar principles
Classification Based On Power Supply: 1. Alternating Current (AC) Motors. 2. Direct Current (DC) Motor.
1.It is easy to control their speed in a wide range For example, motors for driving rail vehicles were, until recently, exclusively DC machines. 1.Since they need brushes to connect the rotor winding. Brush wear occurs, and it increases dramatically in lowpressure environment.
(a) Synchronous Motors (b) Asynchronous Motors (a) Shunt-wound motor (b) Series-wound motor (c) Compound motor
Stator with motor windings Stationary portion of the motor Rotor Rotating portion of the motor Bearings Allow free rotation of the motor shaft End bells Supports the bearings and/or shaft Housing Holds all motor components together and facilitates motor mounting YOKE -The outer frame or yoke serves double purpose. Pole Shoes -The field magnets consists of pole cores and pole shoes. Field Coils-The field coils or pole coils, which consist of copper wire of strip, are former-wound for the correct dimension. Armature windings -The armature windings are usually former-wound.
Commutator - The function of Commutator is to facilitate collection of current from the armature conductors in case of generator i.e. as rectifier and in case of motor which can provide current to the armature conductors i.e. as an inverter. Brushes and Bearings - The Brushes, whose function is to collect current from Commutator or to supply current to Commutator as in the case of generator and motor respectively, are usually made of carbon or graphite and are in the shape of a rectangular block.
PresentationECE
The interaction between the magnetic field and current carrying conductor is explained by Flemings right hand rule.
Smallest motors can be found in Electric wrist watches Medium size motors can be found To provide convenient mechanical power for industrial use The very largest electric motors are used for propulsion of ships, pipeline compressors, and water pumps with ratings in the millions of watts.
Rotor of DC motor
Applications of DC Motors
PresentationECE
ECE131 BASIC ELECTRICAL AND ELECTRONICS ENGINEERING By : Section: K-1613 Roll Number Name Registration Number 41 Abhinav Dwivedi 11606717

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PresentationECE

  • 1. ECE131 BASIC ELECTRICAL AND ELECTRONICS ENGINEERING By : Section: K-1613 Roll Number Name Registration Number 41 Abhinav Dwivedi 11606717
  • 2. AnElectricmotorisa machinewhichconvertselectric energyintomechanicalenergy.Itsactionisbasedonthe principlethatwhena current-carryingconductorisplacedina magneticfield,it experiencesa mechanicalforcewhose directionis givenby FlemingsLeft-handRuleandwhose magnitudeisgivenby F = BIlNewton.
  • 4. Used to turn fans, pumps and compressors Facilitate the circulation of air, water, refrigerant and other fluids Motors are designed for particular applications The correct motor must always be used Most motors operate on similar principles
  • 5. Classification Based On Power Supply: 1. Alternating Current (AC) Motors. 2. Direct Current (DC) Motor.
  • 6. 1.It is easy to control their speed in a wide range For example, motors for driving rail vehicles were, until recently, exclusively DC machines. 1.Since they need brushes to connect the rotor winding. Brush wear occurs, and it increases dramatically in lowpressure environment.
  • 7. (a) Synchronous Motors (b) Asynchronous Motors (a) Shunt-wound motor (b) Series-wound motor (c) Compound motor
  • 8. Stator with motor windings Stationary portion of the motor Rotor Rotating portion of the motor Bearings Allow free rotation of the motor shaft End bells Supports the bearings and/or shaft Housing Holds all motor components together and facilitates motor mounting YOKE -The outer frame or yoke serves double purpose. Pole Shoes -The field magnets consists of pole cores and pole shoes. Field Coils-The field coils or pole coils, which consist of copper wire of strip, are former-wound for the correct dimension. Armature windings -The armature windings are usually former-wound.
  • 9. Commutator - The function of Commutator is to facilitate collection of current from the armature conductors in case of generator i.e. as rectifier and in case of motor which can provide current to the armature conductors i.e. as an inverter. Brushes and Bearings - The Brushes, whose function is to collect current from Commutator or to supply current to Commutator as in the case of generator and motor respectively, are usually made of carbon or graphite and are in the shape of a rectangular block.
  • 11. The interaction between the magnetic field and current carrying conductor is explained by Flemings right hand rule.
  • 12. Smallest motors can be found in Electric wrist watches Medium size motors can be found To provide convenient mechanical power for industrial use The very largest electric motors are used for propulsion of ships, pipeline compressors, and water pumps with ratings in the millions of watts.
  • 13. Rotor of DC motor
  • 16. ECE131 BASIC ELECTRICAL AND ELECTRONICS ENGINEERING By : Section: K-1613 Roll Number Name Registration Number 41 Abhinav Dwivedi 11606717