AC Chopper Based V/F Drive Project - Career Episode 3

COMPETENCY
DEMONSTRATION REPORT
Career Episode 3
DARSH PATEL

CE 3.1 Project Information
Name of the project: AC Chopper Based V/F Drive
Location of the project: Institute of Technology, Nirma University
Project Duration: 16th May 2017
Organization: Institute of Technology, Nirma University
Role and Designation during the time: Team Member
CE 3.2 Project Background
CE 3.2.1 Characteristics of the project
There are many ways of controlling the speed of induction motor among them, widely
used process are v/f control and vector control. I had contributed in my team for developing a
“three phase AC copper” that can provide control over the frequency and the voltage too. This
system is comprised of the “buck-boost dc to dc converter”, uncontrolled rectifier, and inverter.
My team has raised this topic for the project as induction motors are highly favourable to the
environment of industries and in order to meet the requirements of the industries, it is necessary
to control its speed. We had identified many advantages of this process over the traditional
procedures.
CE 3.2.2 Objectives developed for the project
I had set the following goals and objectives for delivering the project in successful and
efficient manner:
 To execute the v / f operation for “VVVF drive application”

 To modulate the “dc-link of the inverter”
 To regain varying output voltage
 To manipulate the output frequency
 To bring out the relation between duty ratio (0 – 1) and reference frequency (0 –
50)
CE 3.2.3 My area of work
I was assigned for the whole activity and set up “of DS1104 R&D controller board and
dSPACE” and hardware implementation of the developed topology. dSPACE is a combination
hardware (“DS1104 R&D controller board”) and software (“MATLAB/ Simulink + ControlDesk
Next Generation”). I had used it because it is helpful in developing complex and high speed
algorithm. I had connected the board to the PC through PCIe slot. I had identified that “Complete
real-time control system is based on a 603 PowerPC floating-point processor which runs at 250 MHz
for advanced I/O purpose the board comprises of a slave-DSP subsystem based on the TMS320F240
DSP microcontroller.” Following is the description of the board: