pwm based three phase induction motor speed controller

8/10/2019 Pwm Based Three Phase Induction Motor Speed Controller

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PWM BASED THREE PHASE INDUCTION MOTOR SPEED

CONTROLLER

Objective:

The objective of our project is PWM Based Three Phase Induction Motor Speed

Controller.

Brief methodology:

This project is designed with

Microcontroller

Pwm driver board

Pwm inverter section

Keypad

3 phase motor

Lcd display

In this project is used to control the speed of the three phase induction

motor. The motor speed can be varied using the freuency variation method. In

this project! the input "# $% &' sine wave is converted into (' using the rectifier.

The &' sine wave is produced using pulse width modulation techniue. The pulse

width modulation pulses are the group of pulses generated with respect to the ac

waveform. In this project we are used the microcontroller to generate the pulse

width modulation pulses. The pulses are given to the M)*+,T driver. The driver

section will improve the current of the pulses. The final output of the M)*+,T

driver is given to the M)*+,T-s. The M)*+,T-s will switch on the high volt

according to the pulse width modulation pulses. The pulse width modulation pulse

duty cycle and pulse width are generated in the mathematical manipulation with

respect to the op waveform. &lso the microcontroller will calculate the current



demand fort ht e reuired torue. The torue fluctuations can be managed using

the current vector control. *o the speed variations can be varied with respect to ht

freuency of the op sine wave. The microcontroller will display the estimated

speed in the L'( display. The /eyboards also interface with the microcontroller toget the set speed of the motor from the user. In this project is mainly used for

controlling the speed of the motor and controlling the torue reuirement of the

load.

BLOCK DIAGRAM:

Rectifier 3 ph!eI"verter

3 phMotor

3 ph!eIGB#driver

Microco"troller

Keypd

$i"gleph!e AC



A%%LICA#IO&$:

0. Induction motor speed control applications in the te1tile industries.

2. 'onstant torue control applications I the wire rolling mills

3. (elivery rate control system in the wire rolling mechanism

. Pneumatic pressure control system using variable fan speed.

". 'onveyor belt control system

AD'A&#AG($:

)* +ully solid state devices are used for accurate speed control system

+*The current control improves the power saving of the induction motor.

3* It will improve the life of the motor.

,* It will protect the motor from over current t and over voltage.

-* It will improve the soft starter of the motor. It controls the starting current t of the

motor.

.* It will improve the smooth speed variations.

/* The acceleration and declaration can be controlled.

0* The torue fluctuation and load variations managed by the intelligent

microcontroller hardware.

1(A#2R( (&A&C(M(&#$:

0. This unit can be integrated with the logic control in the machinery.

2. The centrali%ed control mechanism can be adapted with this project.

3. In this project is used to monitor the power consumption of the machine.



. This unit can be easily programmed as per the reuirement of the industries.

pwm based three phase induction motor speed controller

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