Hi Guest
e.g. - "communication: RFID" Search tips
Find Projects
Model: 361    
Rs. 6,599
Rs. 5,279
50 in Stock
Discount 20%
Buy
Rs. 5,699
Rs. 4,559
50 in Stock
Discount 20%
Buy
Rs. 4,699
Rs. 3,759
50 in Stock
Discount 20%
Buy
PROJECT DESCRIPTION

This project attempts a soft start control technique for the single-phase a.c. induction motor. It presents a design of a low-cost; high-efficiency drive capable of supplying a single-phase a.c. induction motor with a PWM modulated sinusoidal voltage during start. The circuit operation is controlled by an 8051 family microcontroller.

This project attempts a soft and smooth start control technique for the single-phase a.c. induction motor. It presents a design of a low-cost; high-efficiency drive capable of supplying a single-phase a.c. induction motor with a PWM modulated sinusoidal voltage during start. The circuit operation is controlled by an 8051 family microcontroller. The device is aimed at substituting the commonly used triac phase angle control drives. The circuit is capable of supplying a single-phase a.c. induction motor (or general a.c. inductive/resistive load) with varying a.c. voltage at the start.

Same as in triac control, the voltage applied to the load is varied from zero to maximum value in a small span of time during start. On the other hand, it uses a pulse width modulation technique (PWM), and when compared with the phase angle control used for triacs, it produces much lower high order harmonics. Thus, it suits EMC/EMI regulations much better. Because the circuit is aimed at low-cost, low/medium-power applications, it does not use a conventional converter topology to produce the output voltage waveform.

It directly modulates the mains a.c. voltage. Compared with costly converter, it requires a lower number of active and passive power components. In summary, the device attempted here takes advantage of both the low price of the phase angle control and the low harmonic content and high efficiency that we can get with standard converter topology. The drive uses a PWM controlled MOSFET and the load in series with a bridge rectifier. This drive based on this new control technique is targeted for use in consumer and industrial products: washing machine, dishwashers, ventilators, compressors, and wherever the system cost is a consideration.

The input terminals of the rectifying bridge are connected in series to the load. The output terminals (rectified side) has a power transistor (IGBT, MOSFET or bipolar) connected across them. When the power transistor is off, current cannot flow through the rectifying bridge and the load which is in series remains in an off-state. When the power transistor is on, the bridge output terminals are short-circuited, then current can flow through the rectifying bridge and thus through the load.

Thus by changing the duty cycle of the PWM pulses the power to the load is controlled. Special care is taken in the circuit such that the PWM pulses are synchronized with the supply phase by zero voltage sensing points.

PROJECT HIGHLIGHTS
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
Call/mail for Tech Support from 10 am - 7 pm.
Digital Soft Start of Induction Motor.
Can be Customized for Arduino, Raspberry Pi, PIC
BLOCK DIAGRAM
Soft_start_Of_Induction_Motor_by_AC-PWM
Hardware Requirements
  • 8051 series Microcontroller
  • LM358
  • Opto- isolators
  • IGBT
  • Push Button
  • Transformer
  • Diodes
  • Voltage Regulator
  • Resistors
  • Capacitors
  • Zener
  • Crystal
  • Lamp
Software Requirements
  • Keil compiler
  • Languages: Embedded C or Assembly
Q & A
Q:  What is the formula for calculating smoothing capacitor value?
A:  There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.
READ WHAT OTHERS HAVE SAID
Average Rating
 3.9/5
WRITE A REVIEW
Name
Email
Location
Feedback
Please enter security code
Value
Quality
Showing 4 of 7 reviews Show All
Kevin Merchant, Vadodara Gujarat on 14th May, 2016, 05:42 PM

By browsing i got to know about your website.
I got information everything from your website that why i haven’t gone through any other website
i purchased directly
in future i will give reference. I’ll save your number.

Darshan Janthli, Dharwad on 1st June, 2015, 06:20 PM

I come to know Edgefx through ebuy.in and I gone through the website and placed an order. Actually while I was searching for the single phase inverter design, I found this project and I decided to take. I like the concept of the kit.Yes the kit delivered on time with the right components.No I purchased through online.Edgefx should implement complex projects.

Amey, Mumbai on 22nd May, 2015, 12:13 PM

Yes the kit delivered on time with the right components.All my technical queries were cleared and your Technical support is Average.I am satisfied while building the project.Yes I recommend about Edgefx in future.

Bharath , Ahmadabad on 30th January, 2015, 12:43 PM

I came to know about Edgefx while browsing another website I seen the advertisement of Edgefx.I decided because what I needed is present in the kit and I like the Report and PPT in my kit.The kit delivered on time with extra set of components. I also suggested to few of my friends.

Rating Breakdown (7 Reviews)
0
7
0
0
0
SIGN UP FOR NEWSLETTER

Edgefx Technologies Pvt. Ltd.,
Plot No. 105, 3rd Floor,
Liberty Plaza, Himayathnagar,
Hyderabad - 500029,
Telangana, India
© 2012 Edgefx Technologies Pvt Ltd. All Rights Reserved