Project Guide: Mrs.D.S.Khadtare

Project by-Sagar DeokarSarjerao Desai

Piyush Kand

 About Induction motor

Why speed control is necessary in induction motor?

Methods to achieve speed control

V/F speed control method

Introduction:

Characteristics of Induction Motor

AC to DC

Rectifier

DC

Link

Filter

MOSFET Based

Three Phase

Inverter

3 Phase

IM

DSPIC30F2010

(Pulse generator)

Driver Unit

Error signal VREF

VACT

Components of Block diagramAC to DC Rectifier Conversion of sinusoidal

input to DC input

DC link filter Filtered waveform is obtained

without any noise

MOSFET BASED 3 PHASE INVERTER

Inverter is used to convert DC to AC at any required voltage and frequency

MOSFET is used as a voltage controlled device

IGBT’s can also be used.

Components of Block diagramV Active and V Reference Forms a closed loop system.

Sends error signal to controller.Driver Unit Used to provide 9 to 20 volts to switch the

MOSFET Switches of the inverter . Driver unit consists of:

1.Optocoupler 2.Capacitor

3.Supply4.Diode

DSPIC30F2010 Controller Features16-bit MicrocontrollerProgram memoryRAM bytesOperating voltageI/O pinTimer

CONTROLLER CIRCUIT:-

Output: SimulationHardware

Tools used:Matlab /Simulink Simulink, is used frequently in creating and

running simulations and sometimes to do feedback control while in the development or early testing stages.

OUTPUT & TOOLS:-

Output & Tools:Orcade/Pspice personal simulation program with integrated

circuit used for electronic design automation.

AC Induction motors are used in many industrial applications such as. • Appliances (washers, blowers, refrigerators,

fans, vacuum cleaners, compressors• HVAC (heating, ventilation and air

conditioning}• Industrial drives (motion control, centrifugal

pumps, and robotics)• Automotive control (electric vehicles)

APPLICATIONS: