Speed control of 3 - Phase Induction Motor by V / F method using PWM Technique refer
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Active In SP

Posts: 4
Joined: Feb 2010
20-03-2010, 07:23 AM

What it the meaning of V/F and PMW technique? kindly break down the steps involved in actualization of the project and implimentation.
Active In SP

Posts: 291
Joined: Apr 2010
04-04-2010, 01:26 AM

VF Control of 3-Phase Induction Motors Using PIC16F7X7 Microcontrollers
An induction motor can run only at its rated speed when
it is connected directly to the main supply.But many applications need variable speed operations. the
motor user can replace an energy inefficient mechanical
motor drive and control system with a Variable
Frequency Drive (VFD).the most popular control technique
is by generating variable frequency supply, which
has constant voltage to frequency ratio. This technique
is popularly known as VF control.

The PIC16F7X7 series of microcontrollers have three
on-chip hardware PWM modules, making them
suitable for 3-phase motor control applications.

The base speed of the induction motor is directly
proportional to the supply frequency and the number of
poles of the motor.by varying the supply frequency , we can vary the vary the speed of the induction motor.

The 3-phase induction motor is connected to a 3-phase
inverter bridge. The power inverter
has 6 switches that are controlled in order to generate
3-phase AC output from the DC bus. These switches are controlled by the PWM signals,
generated from the microcontroller. The amplitude of phase voltage is determined by the
duty cycle of the PWM signals. Three of the six switches will be on at any time. The switching produces
a rectangular shaped output waveform that is rich in harmonics. A 3-phase sine wave with negligible harmonics is produced from this by the filtering effect of the motor's windings. freewheeling diodes are provided to facilitate the dissipation of energy stored in the windings.

For more details, refer this pdf:

Attached Files
.pdf   VF Control of 3-Phase Induction Motors.pdf (Size: 893.24 KB / Downloads: 1,481)
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Active In SP

Posts: 1
Joined: Jul 2010
25-07-2010, 10:21 PM

I want to get a hint about the sub of controlling of 3-phase I.M through pc
Active In SP

Posts: 1,124
Joined: Jun 2010
16-10-2010, 05:31 PM

This article is presented by:Jaroslav Lepka
Petr Stekl

3-Phase AC Induction Motor
Vector Control Using a
56F80x, 56F8100 or
56F8300 Device

This application note describes the design of a 3-phase AC Induction Motor (ACIM) vector control drive with position encoder coupled to the motor shaft. It is based on Freescale’s 56F80x and 56F8300 dedicated motor control devices. The software design takes advantage of Processor ExpertTM (PE) software. AC induction motors, which contain a cage, are very popular in variable-speed drives. They are simple, rugged, inexpensive and available at all power ratings. Progress in the field of power electronics and microelectronics enables the application of induction motors for high-performance drives, where traditionally only DC motors were applied. Thanks to sophisticated control methods, AC induction drives offer the same control capabilities as high performance four-quadrant DC drives. This drive application allows vector control of the AC induction motor running in a closed-speed loop with the speed / position sensor coupled to the shaft. The application serves as an example of AC induction vector control drive design using a Freescale hybrid controller with PE support. It also illustrates the use of dedicated motor control libraries that are included in PE. This application note includes a description of Freescale hybrid controller features, basic AC induction motor theory, the system design concept, hardware implementation and software design, including the PC master software visualization tool.
Advantages and Features of Freescale’s Hybrid Controller
The Freescale 56F80x (56800 core) and 56F8300 (56800E core) families are well-suited for digital motor
control, combining the DSP’s calculation capability with an MCU’s controller features on a single chip. These
hybrid controllers offer many dedicated peripherals, including a Pulse Width Modulation (PWM) unit, an
Analog-to-Digital Converter (ADC), timers, communication peripherals (SCI, SPI, CAN), on-board Flash and
RAM. Generally, all the family members are appropriate for use in AC induction motor control.
The following sections use a specific device to describe the family’s features.
56F805, 56800 Core Family
The 56F805 provides the following peripheral blocks:
• Two Pulse Width Modulator units (PWMA and PWMB), each with six PWM outputs, three Current
Sense inputs, and four Fault inputs, fault-tolerant design with dead time insertion; supports both
center-aligned and edge-aligned modes
• 12-bit Analog-to-Digital Converters (ADCs), supporting two simultaneous conversions with dual
4-pin multiplexed inputs; ADC can be synchronized by PWM modules
• Two Quadrature Decoders (Quad Dec0 and Quad Dec1), each with four inputs, or two additional Quad
Timers, A & B
• Two dedicated general purpose Quad Timers, totalling six pins: Timer C, with two pins and Timer D,
with four pins
• CAN 2.0 B-compatible module with 2-pin ports used to transmit and receive
• Two Serial Communication Interfaces (SCI0 and SCI1), each with two pins, or four additional GPIO
• Serial Peripheral Interface (SPI), with a configurable 4-pin port (or four additional GPIO lines)
• Computer Operating Properly (COP) / Watchdog timer
• Two dedicated external interrupt pins
• 14 dedicated General Purpose I/O (GPIO) pins, 18 multiplexed GPIO pins
• External reset pin for hardware reset
• JTAG / On-Chip Emulation (OnCE) for unobtrusive, processor speed-independent debugging
• Software-programmable, Phase Lock Loop-based frequency synthesizer for the hybrid controller core
For more information about this article,please follow the link:

seminar addict
Super Moderator

Posts: 6,592
Joined: Jul 2011
25-01-2012, 10:45 AM

to get information about the topic Voltage frequency control of 3phase induction motor. full report ,ppt and related topic refer the link bellow






Thinking To Register

23-02-2012, 01:04 PM

I have seen this project and implimentation useful. But I want the program to be edited to suit a motor for 1 to 400 hz frequency. The author mentioned that the user can edit the parameters. I dont have knowledge of programming. Can you edit this for me. Contact me at ajaydevb@gmail.com Thankyou,
Thinking To Register

22-08-2012, 04:17 PM

i want to information about speed control of 3 phase induction motor by vf method using pwm technic
Bilal Butt 786
Active In SP

Posts: 1
Joined: Sep 2012
15-09-2012, 12:07 PM

plz give me detail data of this project and implimentation.........
seminar tips
Super Moderator

Posts: 8,857
Joined: Oct 2012
16-10-2012, 11:19 AM

to get information about the topic "v f control of induction motor" full report ppt and related topic refer the link bellow



Important Note..!

If you are not satisfied with above reply ,..Please


So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
Rainbow A novel 3 phase to 5 phase transformation using a special transformer connection ujvala 10 3,416 07-10-2015, 01:05 PM
Last Post: Guest
  source code for home automation ac dc using tv remote using AT89S52 microcontroller Guest 5 2,302 29-08-2015, 03:40 PM
Last Post: mkaasees
  All Digital Phase Locked Loop souparnika 0 340 08-01-2015, 11:38 PM
Last Post: souparnika
  RE: 3-phase to 5 phase transformation using special transformer tulasiamrutha 2 919 20-09-2014, 09:04 AM
Last Post: Guest
  Checking and auto control of water level using wireless sensor. Guest 1 1,498 01-08-2014, 06:01 PM
Last Post: komalrohilla243@gmail.com
  implementation of video steganography using LSB technique in MATLAB d000304a 3 3,808 15-07-2014, 04:39 PM
Last Post: mkaasees
  solar power remote control bomb detecting robot manjubannikoppakoppal 1 1,561 17-01-2014, 07:58 PM
Last Post: Guest
Last Post: seminar project topic
  A Novel Data Embedding Method Using Adaptive Pixel Pair Matching Guest 0 371 16-11-2013, 10:41 AM
Last Post: Guest
  vehicle speed contrl system Guest 0 611 17-10-2013, 05:09 PM
Last Post: Guest