Slip

 Slip

When a rotor rapidly accelerates in the direction of rotating field. 

In practice, the rotor can never reach the speed of stator flux. 

If it did, there would be no relative speed between the stator field and rotor conductors.

No induced rotor currents and, therefore, no torque to drive the rotor. 

The friction and windage would immediately cause the rotor to slow down. 

Hence, the rotor speed (N) is always less than the suitor field speed (Ns). 

This difference in speed depends upon load on the motor. 

The difference between the synchronous speed Ns of the rotating stator field and the actual rotor speed N is called slip. 

It is usually expressed as a percentage of synchronous speed Leape slip, s
100(The quantity N-N is sometimes called slip speed. 

(a) When the rotor is stationary (ie.. N-0), ship, s-1 or 100% 

(b) In any induction motor, the change in slip from no-load to full-load is
handly 0.1% to 3% so that it is essentially a constant-speed motor

Comments

Post a Comment

Popular posts from this blog

Electrical Electronics Communication Telecom Engineering Topics Explanation

Introduction to DC-TO-DC Converter  ||| Power Switching Devices Zones of Protection System And His Type  |||  There are six main causes of electric   |||   motor failures  |||  Top Electrical Engineering Interview Questions And Answers  |||  What Is Solar Panel  |||   How Does Solar Panel Work?  |||    What is Logical Circuit?  |||   What is Batter and Types of Battery?  |||   What is Current?   |||  What is Voltage?   |||  What Is Diode?     ||| Circuit Breakers and Rating Of CB  ||| Dry Type Transformers are Self-Extinguishing And Fire Resistant  |||  Kirchhoff's Laws  ||| Difference between AC and DC  ||| Define Amplitude, instantaneous value cycle, Time period, frequenc  ||| Common Causes of Electric Motor Failures   |||   All About Electric Motor  ||| Basic Concept Of Electrical Earthing and Groundin...
Read more

Electrical Transformers

 Electrical Transformers Principle of Electrical Transformers   Click To Read   Transformers Action       Transformers V.I Click To Read                         Click To Read   Transformers Magnetic Circuit                   Click To Read   Auto Transformer       Click To Read   Instrumental Transformer           Click To Read   Potential Transformers           Click To Read   Transformers Bush  Current Transformer       Click To Read                 Click To Read   Tap Transformers    Transformers Polarity       Click To Read                Click To Read   Single Phase Transformers Connections        ...
Read more

Electrical Engineering Top Interview Questions And Answers 50 t0 100

51: Explain the working principal of the circuit breaker? 52: In the motors starting purpose why the armature rheostats at maximum position while the field rheostat is kept in minimum position? 53: What is the significance of vector grouping in Power Transformers?   54: Advantages of vvvf drives over non vvvf drives for EOT cranes?   55: How can you start-up the 40w tube lite with 230v AC/DC without using any choke/Coil?   56: What is electric traction?   57: Why computer humming sound occurred in HT transmission line?   58: What's the one main difference between UPS & inverter ? And electrical engineering & electronics engineering?   59: What is meant by armature reaction?   60: What is Potential Transformer (PT)? 51: Explain the working principal of the circuit breaker?   52: In the motors starting purpose why the armature rheostats at maximum position while the field rheostat is kept in minimum position? 53: What is the significance o...
Read more