DC Motor Drive with Feedback control

Project Title

DC Motor Drive with Feedback control

Project Area of Specialization Wearables and ImplantableProject Summary

Our project title is DC Motor drive with feedback path.This

was an industry project & we have added a feedback path

with the help of control circuit by using Pulse width modulation

Technique. Second thing the display of Real time parameters

of motor such as supply voltage,current,rpm & tacho voltage

by using voltage divider circuit & buck converter are made on

LCD.Also limit has been set to trip the circuit whenever there

is overloaded.

Project Objectives

Actually the problem that industry was facing that whenever

the load is mounted on DC motor or some work piece is

placed then the speed of motor decreases. We have to

mitigate this problem and design a system so that our system

become independent of load so that whenever the load is

mounted, speed will not change.

Second we have to provide an ease to workers operating in

industry that instead of measuring motor parameters again &

again,they just visualize these parameters on LCD.

Third thing there was no sign of overloading.our Project will

eradicate this problem by setting an limit of overload with the

help of potentiometer.As a result a message will be displayed

on LCD whenever system is overloaded & it will trip the

Circuit.As a result remaining components will remain safe.

Project Implementation Method

Control circuit for feedback consist of circuit which first step down the Ac 220V via step down Transformer to Ac 15 V then there comes a diode bridge after that there is Capacitor for filtering purpose then come 7812 IC which is used for voltage regulation.

In simple words the tacho voltage is used as a feedback in control circuit. This Tacho voltage is compared with reference voltage and then it is passed through amplifiers circuit which amplifies the pulse produced as output of IC 712 and LM311. After amplification the error signal enters in pulse Transformer through which gate signal is controlled with respect to error signal generated. In this way Tacho generator voltage is used as a feedback in speed control of PM DC motor.

Benefits of the Project

The main advantage is that as motor rpm become

independent of load.  Losses due to less rpm will be

reduced. As a result the overall efficiency of the system

improve.

Our project will provide an ease to workers in industry by

displaying motors parameters on Lcd.

Technical Details of Final Deliverable

DC motor speed is controlled using voltage feed back cct and all parameters like rpm, main input voltage, tacho voltage and current drawn by motor is shown on LCD.H bridges of two Industrial Diodes and two Industrial Thyristors configration  is used to convert AC into DC. 

Final Deliverable of the Project Hardware SystemType of Industry Manufacturing Technologies Wearables and ImplantablesSustainable Development Goals Responsible Consumption and ProductionRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	12701
Voltage control feedback cct	Equipment	1	4000	4000
LCD	Equipment	1	400	400
arduino	Equipment	4	550	2200
power resistors	Equipment	20	10	200
Ribbon wire	Equipment	4	120	480
bread board	Equipment	2	120	240
buck converter	Equipment	1	200	200
relay	Equipment	1	100	100
tft screen	Equipment	1	650	650
transformer	Equipment	1	120	120
capacitors	Equipment	20	5	100
potentiometer	Equipment	12	8	96
Hall sensor	Equipment	2	400	800
wooden board	Miscellaneous	1	1000	1000
push buttons	Equipment	3	20	60
load bench	Equipment	1	400	400
tungesten bulb	Equipment	4	50	200
thyristor	Equipment	4	15	60
octocoupler	Equipment	9	150	1350
ic bases	Equipment	9	5	45