Speed Control of Single Phase Induction Motor Using VFD

Project Title

Speed Control of Single Phase Induction Motor Using VFD

Project Area of Specialization Electrical/Electronic EngineeringProject Summary

We are designing variable frequency drive for controling speed of single phase induction motor. Our
design is based upon the previously tested version of VFD for three phase induction motor with some
modifications. The existing single phase VFD can't work with single phase induction motor due to
capacitor attached to the motor. We are going to remove that capacitor. We are creating phase shift for
driving the motor through our VFD.

Project Objectives

The objective of our project is to control the speed of single phase induction motor upto 0.5 horsepower.

Project Implementation Method

AC source voltage is converted into DC voltage and supplied to inverter circuit. The inverter circuit
consists of 2 H-bridges. One H-bridge energize main winding with 0 degree phase and other H-bridge
energize auxiliary winding with 90 degree phase shift for proper functioning of single phase induction
motor. H-bridges consists of MOSFETs which are controlled by controller.

Benefits of the Project

1. Saves energy
2. Higher system efficiency
3. Reduced maintenance
4. Better process control
5. Remote mounting

Technical Details of Final Deliverable

Final deliverable is VFD which controls the speed of single phase induction motor. The frequency ranges
from 10-50Hz in the multiples of 10.

Final Deliverable of the Project Hardware SystemCore Industry Energy Other IndustriesCore Technology OthersOther TechnologiesSustainable Development Goals Industry, Innovation and InfrastructureRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	22353
Resistor	Equipment	24	2	48
Capacitor	Equipment	7	30	210
2N2222	Equipment	3	60	180
IR2110	Equipment	4	120	480
4N28	Equipment	4	30	120
2-Pin Connector	Equipment	18	25	450
Ferric Chloride	Miscellaneous	1	250	250
Soldering Iron	Miscellaneous	1	750	750
Soldering Wire	Miscellaneous	1	250	250
Soldering Paste	Miscellaneous	1	150	150
PCB Board	Miscellaneous	2	300	600
Single Phase Induction Motor	Equipment	2	5000	10000
1N4148	Equipment	4	15	60
Labor	Miscellaneous	1	5000	5000
Heat Sink	Equipment	8	50	400
Bridge 3510	Equipment	1	120	120
Bridge Round	Equipment	1	20	20
Fuse + Holder	Equipment	1	25	25
IC 7805	Equipment	1	20	20
IC 7812	Equipment	1	20	20
IRF 9640	Equipment	4	60	240
IRF 640	Equipment	4	60	240
Heat Shrink Tube	Equipment	2	50	100
Capacitor 250W	Equipment	1	120	120
Controller	Equipment	2	1250	2500