Other Activities

FBD2FWP* Contest :

To Encourage and Enhance Application of Academic Learning towards Real Time Engineering, the department of EEE conducts a contest,spread across the semester, for the students to convert a Functional Block Diagram to a Functionally Working Prototype (FBD2FWP) with a prize worth of Rs. 7,000

Objectives of the Contest

  • Encourage students by providing a space to apply the academic learning of previous semesters and appreciate their importance
  • Enhance the interest on the subject in current semester and appreciate their relevance to real time practices
  • Provide Exposure to Real Time Problem Solving Approach

Contest Statement

  • Design and implement an analog controller based on operational amplifiers for solid state control of three phase induction motor
  • The controller should generate necessary PWM pulses required by a three phase VSI (Voltage Source Inverter) in order to vary the magnitude and frequency of the output voltage

Functional Block Diagram

Design Specifications

  • Generate 6 PWM Pulses at a switching frequency of 1050 HZ and variable duty cycle based on sinusoidal pulse width modulation
  • A dead band of more than 15 micro seconds need to be generated between complimentary pulses
  • Pulses should be of 5 V Amplitude
  • Use quad op amps for all the sub systems shown in FBD
  • Frequency of the modulation wave – 10 ~ 50 HZ
Hint- Use Quad operational amplifiers IC’s (4 op amp in single IC) with single power supply (5 V), rather than dual power supply, so that 5 V pulse varying between 0 and 5 V could be achieved

Desired Deliverable

  • Show the PWM pulses in scope and demonstrate the capability of varying pulse width
  • Show the frequency of pulse coincides with the design value
  • Show the dead band meets the design value
  • Run a Inverter fed Induction Motor with the PWM pulses generated by the participant and show variation in speed

Evaluation Steps & Important Dates

  • Stage-1 Design Review (05/02/2014)
  •    --> Submit detailed schematics of all subsystems with design details of each components

       --> Show possible simulation results to validate design

  • Stage-2 Demonstrate using Bread board based prototypes (05/02/2014)
  • Stage-3 Fabricate your own PCBs and demonstrate the desired deliverables (Last week of March 2014)


  • It is a team event, one team can consist a maximum of 4 members
  • All the teams who wish to participate need to register on or before 10/01/2014
  • A nominal Registration fees of Rs 100/- has been fixed to induce commitment from the participants
  • A Skill development workshop on “PCB Design and Fabrication” will be conducted for interested III EEE students in February month, for imparting the necessary skills required to compete in the contest