V f control of induction motor ppt

An electric drive system consisting of electric motor , its power controller and energy transmitting shaft consisting of load. In Case of Squirrel cage induction motor the slip cannot be increase above certain limit, the operating speed range is very less. Research The research of speed control for induction motor based on dynamic . Motor have two main parts one is stator and second is rotor.

Speed of three phase induction motor can be control from stator side and rotor side.

INDUCTION MOTOR MAXIMUM TORQUE.

Constant Airgap Flux Control References 2.

Effect of varying rotor resistance on T- ω of wound rotor. Working principle of three phase induction motor. Different Speed Control Methods.

By the help of this presentation anyone can easily understand the concept of VFD . Induction motors are widely used ac motors in industrial area. Advanced semi conductor technology and uses of microcontroller have made the speed control of induction motor easier. The proposed paper presents variable speed control application of induction motor using vf method.

Introduction In industry traditionally AC machines have been used in constant speed applications, whereas DC machines were preferred for variable speed drives. DC machines have the disadvantages of higher cost and maintenance problems with commutators and brushes. Commutators and brushes do not permit a . The simulation showed that Indirect Field oriented control (IFOC) induction motor drive employ decoupling of the stator current components which produces torque and flux. Changing the number of stator poles. Adding rheostat in the stator circuit.

Injecting slip frequency emf into . This is the most popular method for controlling the speed of an induction motor. As in above metho if the supply frequency is reduced keeping the rated supply voltage, the air gap flux will tend to saturate. This will cause excessive stator current and distortion of the stator flux wave.

A Variable Frequency Drive (VFD) is used to control the.