INTERNSHIP PROGRAMME - Electrowaves Electronics...3. Control Engineering by Prof. S.D. Agashe, IIT...

ELECTROWAVES ELECTRONICS PVT. LTD.

INTERNSHIP PROGRAMME

CONTENTS

• About the Company • On-going Projects • Future Projects • Knowing your workplace • Internship Profiles • Pre-requisites for Interns • Interview Preparation Tips • Things to Learn @ EWE • Questions to Expect • Location • Contact Info

ABOUT THE COMPANY

• ISO 9001:2008 Certified Company established in 1999.

• Approved Vendor/Manufacturer of Power Electronics products for Indian Railways.

• Focused on developing and manufacturing high end electronics and electrical products for our customers with state of the art technology.

• We have developed the following products for Indian Railways:

1. 25 kVA Inverter

2. 30 kW Battery Charger

3. 2.5 kVA Inverter

4. 2.5 kW Battery Charger

5. BLDC Fans

6. Cable harness

ON-GOING PROJECTS

• LED lights for Indian Railway Coaches.

• Smart LED Lighting

• Fast EV chargers for EV’s.

• Solar PV based EV Battery Charger.

• Grid Tied Solar Inverter

• High Power Converters for Indian Railways

FUTURE PROJECTS

• 60 KVA Transformers for Indian Railways.

• Power/Control Panels for AC Coaches.

• Central Server for EV charging stations

• Interface between Embedded Hardware with Cloud Based Server.

KNOWING YOUR WORKPLACE

• Newly built R&D lab with ESD safe epoxy flooring and all the instruments like DSO, Power Analyzer, Auto-transformers, Dual DC regulated power supplies and many more.

• Located in Industrial Area Phase-1, Panchkula. 100 metres from Himalayan expressway.

INTERNSHIP PROFILES

• The following internship profiles are for both B.Tech and M.Tech students:

• Power Electronics System Design Intern (for EE)

• Embedded System Design Intern (for ECE)

• IoT Design Intern (EE/ECE/CSE)

• Mobile Application Developer (CSE/IT/ECE)

PRE-REQUISITES FOR INTERNS

• Courses that Electrical Engineering Students are expected to be familiar: 1. Basics of Power Electronics

2. Electrical Machines

3. Analog Electronic Circuits

4. Digital Electronic Circuits

5. Basics of Microcontrollers

6. Basic C

7. Control Systems

8. Numerical Integration


• Courses that Computer Science Engineering Students are expected to be familiar: 1. MySQL

2. Java

3. Android

4. React


• Courses that Electronics & Communication Engineering Students are expected to be familiar: 1. Embedded System Basics: Basic C, Timers, Interrupts, Serial

Communication (UART, I2C, SPI), Peripheral Interfacing (RTC, EEPROM, Sensors, LCD, Push buttons).

2. Analog Electronic Circuits

3. Digital Electronics

4. Control Systems

5. Digital Signal Processing

6. Internet of Things

7. Knowledge of GSM/GPS and ESP8266

INTERVIEW PREPARATION TIPS

• Recommended Lecture Series (Electrical Engineering): 1. Power Electronics by Prof. B.G. Fernandes, IIT Bombay (NPTEL).

2. Switched Mode Power Conversion by Prof. V. Ramanarayanan, Prof. L. Umanand, IISc Banglore (NPTEL).

3. Basic Electrical Technology by Prof. L.Umanand, IISc Banglore (NPTEL)

4. Control Engineering by Prof. S.D. Agashe, IIT Bombay (NPTEL)

• Reference Books (Electrical Engineering): 1. Power Electronics: Converters, Applications and Design by Ned Mohan,

T.M Undeland, W.P Robbins.

2. A First Course on Electrical Drives by Ned Mohan.

3. Analog Electronic Circuits by Donald Neamen.

4. Digital Design by Morris Mano.

5. 8051 Microcontroller by Mazidi.

6. Let Us C by Yashwant Kanetkar.

7. Control Systems by K. Ogata.

INTERVIEW PREPARATION TIPS

• Recommended Lecture Series (Electronics & Communication Engineering): 1. Fundamentals of Microelectronics by Prof. Behzad Razavi (Youtube).

2. Embedded Systems by Prof. Santanu Chaudhary (NPTEL).

3. Control Engineering by Prof. S.D. Agashe, IIT Bombay (NPTEL).

4. Digital Signal Processing by Prof. S.C Dutta Roy, IIT Delhi (NPTEL).

• Reference Books (Electronics & Communication Engineering): 1. Fundamentals of Microelectronics by Behzad Razavi.

2. Microelectronics by Sedra and Smith

3. Digital Design by Morris Mano.

4. PIC Microcontroller by Mazidi.

5. Let Us C by Yashwant Kanetkar.

6. Control Systems by K. Ogata.

QUESTIONS TO EXPECT (EE)

• Students should come prepared with answers to the following questions:

• Why are PI controllers so popular in Power electronics and PID controllers are a strict no in power electronics?

• How do you implement PI controller and a low pass filter on DSP controller (Eg. TMS320xxxx) or a microcontroller?

• What is a single quadrant, two quadrant and four quadrant switch in power electronics? How are these switches realized using power semiconductor devices?

• What’s the meaning of Reactive power in electrical engineering? Is the meaning different for single phase case and three phase case?

• Difference between Transformer and mutually coupled inductor?

• Why can’t DC machines be used for high power applications?

* For any difficulties/discussions/query in any question, please leave a mail. (Mail Id’s on Last slide)


• In Electrical Engineering, why don’t we use single phase systems for power levels > 5 kW?

• Why does negative phase margin and gain margin cause instability in a given system? (Explain Qualitatively)

• Under what conditions is Virtual short valid in Opamps?

• Give an Application of positive feedback in Opamps?

• Students are suggested to study the following DC-DC Converters in detail: – Flyback Converter

– Forward Converter

– Push-Pull Converter

– Half-Bridge Converter

– Full-Bridge Converter

– Current fed Push-Pull Converter



• How does this circuit work as a buck converter?

• How does this circuit work as a boost converter?

• How does this circuit work as a buck-boost converter?



• Explain how active and reactive power can be exchanged with the grid in the above diagram?

• What is the limitation on the DC link voltage for this circuit to work?


QUESTIONS TO EXPECT (ECE)

• Difference between built-in voltage and cut-in voltage of diode?

• Why does negative phase margin and gain margin cause instability in a given system? (Explain Qualitatively)

• Under what conditions is Virtual short valid in Opamps?

• Give an Application of positive feedback in Opamps?

• How can one implement PI controller using Opamps?

• How can you generate a perfect 50% duty cycle square wave using 555 timer?

• Difference between harvard and von-nuemann architecture? Why von-neumann architecture is preferred over harvard architecture?

• Why it is preferred to use microcontroller as a sink rather than a source?

• Design a circuit to read temperature from a thermistor, give the input to microcontroller and display temperature (in °C) on LCD?

• Difference between 8-bit and 4-bit mode of LCD interfacing? Why it is preferred to use LCD in 4-bit mode?

• How would you carry out parallel communication between a 5V microcontroller and a 3V3 microcontroller?



• Design a digital system for the following problem statement: A room has an electronically controlled light. If the room is empty, light should be off and if there is someone in the room, light should be on. There is a PIR sensor on the door which provides logic 1 (for few seconds and then goes to logic 0) for a person entering the room.


PIR Sensor

Digital System

Light

GND

Sensor Provides Pulse Input


• Design an electronic system for the following problem statement: the 3 analog signals are A,B and C. Generate 3 digital outputs X, Y, Z based on the following: (Hint: Use OPAMPS as comparators and Logic gates) – If A>C and A>B, Digital outputs X and Y should be high, Z is low.

– If A>C and A<B, Y and Z should be high and X low.

– If A<C and A>B, Y and Z should be high and X low.

– If A<C and A<B, X and Z should be high and Y low.


? A

B

C

X

Y

Z

+12V -12V GND

THINGS TO LEARN @ EWE

• Design of Complete Embedded System as shown in above diagram which includes:

1. Choosing the right microcontroller and peripherals for your design.

2. Design of Schematic for simulation and PCB design using Proteus and OrCAD based on the specifications.

3. Embedded coding for particular application.

4. Design of PCB using OrCAD PCB Designer.

• For Embedded System Design Intern:

THINGS TO LEARN @ EWE

• A Generic Power Electronic system is shown above.

• Few Examples: Battery Chargers, Inverters (Home, Solar), UPS.

• Deep insight into design of such a complete power electronic system will be provided.

• For Power Electronics System Design Intern:

LOCATION

• Location: Plot No. 486, Industrial Area Phase-1, Panchkula, Haryana.

CONTACT INFO

• FOR ANY QUERIES, PLEASE FEEL FREE TO LEAVE A MAIL AT FOLLOWING EMAIL ID’s:

• For Electrical Engineering Students:

[email protected]

• For Electronics Engineering Students:

[email protected]

[email protected]

• For Computer Science Students:

[email protected]

Or Visit us at http://www.electrowaveselectronics.com/

mailto:[email protected]




http://www.electrowaveselectronics.com/

INTERNSHIP PROGRAMME - Electrowaves Electronics...3. Control Engineering by Prof. S.D. Agashe, IIT...

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