ELECTRICAL MACHINES DC MOTOR DETE 2 BY PRASAD

ELECTRICAL MACHINES- DC MOTOR DETE 2 BY- PRASAD A. PAWASKAR SPN NO. 0903055

Take a ride of motor! This presentation consists of the following concepts related to the electrical machine which is used everywhere called ‘DC MOTOR’. q What are electrical machines? q What’s a Dc Motor? q It’s basic parts. q Animated working. q Different Motors. q Compare generator & motor diagrammatically. q Summary.

Electrical Machines An Electrical machine is a device that converts mechanical energy to electrical energy or vice versa, and changes AC voltage from one level to another level. Electrical machines are divided into three parts: 1. Generator 2. Motor 3. Transformer

DC MOTOR In any electric motor, operation is based on simple electromagnetism. A current-carrying conductor generates a magnetic field; when this is then placed in an external magnetic field, it will experience a force proportional to the current in the conductor, and to the strength of the external magnetic field.

Dc motor basic parts Every DC motor has six basic parts-axle, rotor , stator, commutator, field magnet(s), and brushes. In most common DC motors , the external magnetic field is produced by high-strength permanent magnets, Stator-stationary part of the motor rotor -consists of windings

Detailing of Parts The two important parts of a Dc motor is the Rotor & Stator. In simple words Rotor is the rotating part of motor & Stator is the stationary part of the motor. The Rotor actually as two sides in middle there is a AXLE, means that it is like a wheel which helps the Rotor to rotate. The Rotor is covered with the windings. These parts are actually placed in another part that’s called the Metal FRAME. The most basic part needed for working of any kind of motor is the FIELD MAGNETS.

Basic words related to a DC Motor TORQUE- Any kind of Force on the system(conductor). STARTER-Device that creates a Force STARTER internally that tends due an internal combination to cause Rotation of the engine(motor. ) LOAD- External force acting on the mechanism.

Working of a Simple DC MOTOR Next slide

Types of Motors There are various types of motors having the same basic principle: 1. Synchronous Motors 2. Induction Motors 3. Stepper-Motors 4. Universal motors

Compare generator & motor MOTOR GENERATOR

Summary The following are the important points that should be noted while considering a DC MOTOR: 1. Dc motor is most used electrical machine. 2. Converts electrical to mechanical energy. 3. The mechanical movement produced due to torque. 4. A Dc motor should never be started without load. 5. Starters are essential for starting all motors.

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