e-Newsletter - March 2023

Department Events

Expert lecture on “Medium Voltage Switchgear” by Shri. Amit Mahale

An Expert lecture in Association with IEEE Students Chapter has been arranged by the electrical department on “Medium Voltage Switchgear” for TE(A) and BE Electrical Division: A and B students and staff members of the department on 24/3/2023. The Resource Person was Mr. Amit Mahalle, Head Marketing, Air Insulated Switchgear, ABB India Limited, Nashik. A total of 115 Students attended the session. This lecture helped students to acquire knowledge application of different insulators, Circuit breakers, and Relay circuits. 

Expert lecture on “Basics of Power System Protection” by Shri. Mangesh Dalvi

An Expert lecture has been arranged in association with the IEEE Students Chapter of the electrical department on “Basics of Power System Protection” for TE Electrical Division: A and B students and staff members of the department on 02/3/2023. The Resource Person was Mr. Mangesh Dalvi, Additional Executive Engineer, MSETCL.  A total of 116 students attended this session. This session helped students to understand which Faults most occur in the power system sector and Fault types.

Student Interaction session on “Power Systems” by Ms. Poonam Khairnar

The Electrical department organized an Expert Lecture in Association with IET On-Campus on “Power Systems" for SE Electrical (Division: A and B) students and staff members of the department on 04/03/2023. The Resource Person was “Ms. Poonam Khairnar” CEO of Silver House, Ambad, Nashik. A total of 103 students attended the session.

Expert lecture on “Single Phase Inverter Control Techniques for Interfacing Renewable Energy Sources with Micro-Grid” Dr. Sanjib Kumar Panda

On behalf of the IET on-campus and IEEE Student Chapter of the Electrical department has organized an Expert lecture on “Single Phase Inverter Control Techniques for Interfacing Renewable Energy Sources with Micro-Grid” for SE and TE Electrical (Division: A and B) students and staff of the department on 10/03/2023. The Resource Person was “Dr. Sanjib Kumar Panda” Associate Professor, Department of Electrical Engineering, NUS, Singapore. A total of 92 students attended the session. In this session, Dr. Panda provided a brief overview of the IEEE Power Electronics Society and present the research work carried out by his students in the area of renewable energy. A few students from other institutes also attended the session.

Student Corner

Student Placement

The following students are placed in various multinational companies in March 2023 Congratulations to all the students!

Sr. No.	Name of the Student	Placement Date	Batch
1.	Pooja Sanjay Narkhede	06/03/2023	2022-23
2.	Pavan Sanjay Avhad	06/03/2023	2022-23
3.	Aditya Kishor Naphade	06/03/2023	2022-23
4.	Venkatesh Joshi	03/03/2023	2022-23
5.	Aarambh Anil Ahire	16/03/2023	2022-23
6.	Akash Appasaheb Shriram	02/03/2023	2022-23

 

Students Achievement

In the academic year 2022–2023, the following students were toppers in the electrical department.
TE Electrical (Semester I) Toppers and TE Electrical Subject Wise Result Analysis (Semester I):

Subject	Head	Division	Total Strength	Appeared	O	A+	A	B+	B	C	P	Fail	Pass	% Pass
Industrial and Technology Management	Th	Div A	78	78	7	11	21	7	7	5	12	8	70	89.7
		Div B	74	72	1	13	20	7	12	5	6	10	62	86.1
Power Electronics	Th	Div A	78	78	0	4	6	8	7	4	11	38	40	51.3
		Div B	74	73	0	0	7	3	7	14	20	22	51	69.9
	PR	Div A	78	78	33	13	13	3	4	5	4	3	75	96.2
		Div B	74	74	14	16	27	5	2	1	5	4	70	94.6
Electrical Machines-II	Th	Div A	78	78	1	4	12	15	8	9	8	21	57	73.1
		Div B	74	74	0	7	20	11	12	8	4	12	62	83.8
	PR	Div A	74	78	15	42	13	1	4	1	2	0	78	100.0
		Div B	74	74	52	13	0	0	0	0	0	9	65	87.8
Electrical Installation Maintenance and Condition Based Monitoring	Th	Div A	78	78	11	9	19	7	5	3	8	16	62	79.5
		Div B	74	74	1	14	28	8	3	7	3	10	64	86.5
	OR	Div A	78	78	22	31	12	9	4	0	0	0	78	100.0
		Div B	74	74	14	25	26	6	1	0	2	0	74	100.0
Advanced Microcontroller and Embedded System	Th	Div A and B	76	76	2	10	15	9	5	4	8	23	53	69.7
Digital Signal Processing	Th	Div A and B	76	76	20	19	15	6	3	1	5	7	69	90.8
Seminar	TW	DIv A	78	78	23	37	13	0	1	0	4	0	78	100.0
		Div B	74	74	34	32	5	1	1	0	1	0	74	100.0

Rank	Division A	SGPA	Marks	%
1	Sapkale Himanshu Chhabil	9.67	567	81
2	Waje Shital Kailas	9.43	564	80.6
3	Patil Sanika Rajesh	9.38	563	80.4
4	Dheple Ishwari Sanjay	9	547	78.1
5	Rokade Rohit Balasaheb	8.95	522	74.6
Rank	Division B	SGPA	Marks	%
1	Chavanke Gauri Ravindra	9.14	542	77.4
2	Kardak Vishal Devidas	9.14	532	76
3	Bodke Roshan Ramesh	9.1	533	76.1
4	Girase Sakshi Sham	9	525	75
5	Kalyankar Umesh Namdevrao	9	523	74.7

 TE Toppers: Division A

TE Toppers: Division B

 

BE Electrical (Semester I) Toppers:

Rank	Division A	SGPA	Marks	%
1	Barhate Piyush Bharat	9.4	573	81.86
2	Kulkarni Sanjana Mukund	9.2	539	77
3	Kasture Maitreya Kishor	9.15	540	77.14
4	Pawade Omprakash Deepak	9.1	534	76.29
5	Lengole Khushbu Sunil	9	516	73.71
Rank	Division B	SGPA	Marks	%
1	Wagulde Harshal Ashwin	9.1	532	76
2	Bhoir Aakanksha Gorakh	8.85	523	74.71
3	Jadhav Pooja Ambadas	8.65	508	72.57
4	Jain Pranjal Rajesh	8.6	511	73
5	Chaudhari Tejas Anil	8.6	494	70.57

BE Electrical (Semester I) Subject-wise Result: 

Subject	Head	Division	Total Strength	Appeared	O	A+	A	B+	B	C	P	Fail	Pass	% Pass
Power System Operation and Control	Th	Div A	81	80	0	3	9	14	11	11	13	19	61	76.3
		Div B	74	72	0	0	5	15	17	13	10	12	60	83.3
	OR	Div A	81	81	27	45	9	0	0	0	0	0	81	100.0
		Div B	74	72	59	11	1	0	0	0	0	1	71	98.6
Advanced Control System	Th	Div A	81	80	1	5	10	5	13	12	3	31	49	61.3
		Div B	74	72	0	2	6	6	10	13	8	27	45	62.5
	OR	Div A	81	81	36	16	19	3	2	0	4	1	80	98.8
		Div B	74	72	23	32	16	0	0	0	0	1	71	98.6
PLC-SCADA/PQM	Th	Div A	81	79	1	12	18	6	9	10	8	15	64	81.0
		Div B	74	72	2	5	21	10	7	9	6	12	60	83.3
	OR	Div A	81	79	40	19	11	4	2	0	0	3	76	96.2
		Div B	74	72	24	24	15	3	0	0	0	6	66	91.7
Electric and Hybrid Vehicle	Th	Div A	81	80	2	13	26	12	8	7	6	6	74	92.5
	Th	Div B	74	72	1	8	25	15	10	5	6	2	70	97.2
	TW	Div A	81	80	35	31	13	1	0	0	0	0	80	100.0
	TW	Div B	74	72	37	26	7	2	0	0	0	0	72	100.0
Project Stage-I	TW+ OR	Div A	81	80	26	43	11	0	0	0	0	0	80	100.0
	TW+ OR	Div B	74	72	6	47	19	0	0	0	0	0	72	100.0
MOOCS	TW	Div A	81	76	49	6	10	1	3	0	2	5	71	93.4
		Div B	74	71	52	3	7	0	1	2	2	4	67	94.4

BE Toppers: Division A 

BE Toppers: Division B

International Women’s Day

On the occasion of International Women’s Day on 10/03/2023, the EFFECT Student body of the Electrical Department felicitated all the women of the campus working in the cleaning department of our institute for keeping the whole campus, different institute buildings, and respective floors clean and neat and making a feel happy when we enter into the campus.

Congratulations for Live Project at ABB Limited

11 students in the Third Year of the Department are selected for the live projects in ABB Ltd. Nashik. Congratulations to all of them. Prof. Saravanan is Mentor for them. 

 

Congratulations!

Students for the Department Mr. Barhate Piyush Bharat, Mr. Rathod Prasad Vijay, and Ms. Sonawane Purva Narendra received 1st Prize (Cash prize 5k, medal, and certificate) in Technovation 2023 Division 3 Round hosted by Godavari College of Engineering, Jalgaon in association with IEEE Bombay Section's Student Activities Committee (SAC). 

Congratulations!

Our Student Mr. Nilesh Gaikwad (World No 6 Para-Badminton Athlete and Student of BE Electrical Engineering) became National Champion by Winning Gold Medal (Men's Singles) and 1 Bronze Medal (Men's Doubles) in the National Para-Badminton Championship 2023 held at Lucknow Uttar Pradesh from 23-26 March 2023.

Faculty Corner

Faculty Interaction for Understanding the research culture at NSU

Interaction of Department faculty members with Dr. Sanjib Kumar Panda, Associate Professor and Area Director, Power, and Energy Research Group, Department of Electrical Engineering, NUS Singapore was arranged on 10^th March 2023 for understanding the research culture at NUS and identifying opportunities for collaboration.

Visit to Dubai

A team of K.K.Wagh Institute of Engineering Education and Research, Hon. Shri. Sameer Wagh (Chairman, K. K. Wagh Education Society), Dr. Keshav Nandurkar (Director, KKWIEER), Dr. V. S. Mane (HoD, Chemical Department), Dr. Pramod Shahabadkar (T&P Officer) and Dr. Ravindra Munje (I/C HoD, Electrical Department) visited the Emerson Solutions Centre in Dubai, Ducto Group of Companies, American University of Sharjah, Rochester Institute of Technology of Dubai, Manipal University Dubai, FOX Solutions FZE in Dubai, BITS Pilani (Dubai Campus), Amity University (Dubai Campus) and Allied Contracting L.L.C. in Dubai, UAE during 15th March to 19th March 2023.

Visit to American University of Sharjah

Visit to Allied Contracting LLC

Visit to Rochester Institute of Technology

Visit to Emerson

Visit to MANIPAL University 

 

Alumni Meet in Dubai

An Alumni Meet was conducted on 18th March 2023 in Dubai. Around 47 alumni of the Institute located in the UAE region participated in this alumni meeting. From the Department of Electrical Engineering, around 6 alumni participated. On behalf of the department, the meeting was attended by Dr. Ravindra Munje. It was great to listen to the alumni. A photograph of alumni was taken during this visit.

 

Alumni Meet in Mumbai

An Alumni Meet was conducted on 11th March 2023 in Mumbai. Around 189 alumni of the Institute located in the Mumbai region participated in this alumni meet. From the Department of Electrical Engineering, around 20 alumni participated. On behalf of the department, the meeting was attended by Dr. R. K. Munje and Prof. N. N. Jangle. It was great to listen to the alumni.  A photograph with Hon. Chairman, Er. Sameer Wagh was taken during this visit. 

Interacted with industry professionals from ABB

A team from ABB Limited, Nashik visited the department for interaction with students on 05/03/2023. Ms.Megha Kulkarni Nashikar, Ms.Sukhada Raut, Mr. Milind Tambat, Mr.Sainath Bhutada, Mr.Pankaj Kulkarni

Alumni Interaction

Our Alumnus Mr. Prasad Patil (Director, Shree Altima International FZC, Dubai) visited the department on 25.03.2023

Faculty Publication

Atharva Pandharikar, Deepti Dabal, Rina Gholap, Harshada Sonawane, Priyadarshini, Ganesh Jadhav, "IDENTIFY DIFFERENTIATED LEARNERS TO ENHANCE LEARNING OUTCOMES", International Journal of Emerging Technologies and Innovative Research, ISSN:2349-5162, Vol. 10, Issue 3, Page No. 60-65, March-2023 

Student Articles

Variable Frequency Drives [VFD]

Shinde Sandhya Bharat   TE Electrical, DIV B

                                                      Sandhyashinde858@gmail.com

                                                                                                                                              A variable frequency drive (VFD) is an electronic device that is used to control the speed and torque of an electric motor. It is also known as an adjustable frequency drive, variable speed drive, or AC drive. The main function of a VFD is to regulate the power input to the motor, thereby controlling its speed and reducing energy consumption. VFDs also provided start and stop control, acceleration and deceleration, and overload protection. Many VFDs are networkable, allowing them to integrate into and provide feedback to a process control system. Most industrial power systems run on alternating current (AC), generally 3-phase but sometime 1-phase. Therefore, VFDs must be able to vary the frequency of an AC voltage to adjust the speed of an AC motor. To do this, they take advantage of direct current (DC).

How do Variable Frequency Drives work?

A VFD works by varying the frequency of the electrical supply to the motor. The motor's speed is directly proportional to the frequency of the AC voltage supplied to it. By adjusting the frequency of the power input, a VFD can control the speed of the motor. A VFD typically uses pulse-width modulation (PWM) to generate a variable frequency output waveform. The PWM technique involves rapidly switching the voltage on and off to create a sine wave of varying frequency and amplitude. The resulting waveform is then fed to the motor, which converts it into mechanical energy.

AC to DC Converter

The first stage of a Variable Frequency AC Drive, or VFD, is the Converter. The converter is comprised of six diodes. They allow current to flow in only one direction. AC input voltage is passed through a diode bridge which produces a rectified DC voltage on the DC bus.

 

DC Bus

As an example, with a typical 480 VAC 3-phase input voltage, the DC bus will hold a charge of about 650 VDC, with actual bus voltage depending on the line voltage level and motor load. The reason the DC bus voltage is higher than the nominal input line voltage is due to the root-mean-squared measurements of AC sine waves (the “peaks” of a 480 VAC sine wave are about 679 volts, which is minus the ripple) An electrolytic capacitor is added to the DC bus to filter undesired AC frequencies and hold the charge.

Figure 1. VFD basic schematic diagram

 

DC to AC converter

The DC voltage is then synthesized back into 3-phase AC output voltage through a series of switches or transistors. The most common ones in use today are insulated gate bipolar transistors (IGBT). These fast-switching IGBTs are operated rapidly to create a square wave using pulse width modulation (PWM). PWM square waves create an AC signal based on their frequency (the number of on/off cycles per second )and duty cycle (the width or duration of how long the signal remains on during each pulse) and amplitude (the height of the pulse determined by the DC voltage level), The output from the VFD is a “rectangular” waveform. VFDs do not produce a sinusoidal output. This rectangular waveform would not be a good choice for a general-purpose distribution system but is perfectly adequate for a motor. If we want to reduce the motor frequency to 30 Hz, then we simply switch the inverter output transistors more slowly. But, if we reduce the frequency to 30Hz, then we must also reduce the voltage to 240V to maintain the V/Hz ratio.

Figure.2. PWM output waveform of VFD

 

Advantages of Variable Frequency Drives

There are several advantages to using VFDs in electric motor applications. These include:

 

1. Energy savings

VFDs can reduce energy consumption by controlling the speed of the motor. By adjusting the motor speed to match the load, VFDs can reduce the amount of energy required to run the motor. Another consideration is that many end-user electricity costs are calculated based on peak usage. AC motors started with a traditional across-the-line motor starter may experience a current inrush as high as 20 times the normal full load, which can be minimized with a VFD, resulting in substantial savings.

2. Improved motor performance

VFDs is that they can help improve the reliability and lifespan of electric motors. By reducing the stress on the motor and minimizing wear and tear, VFDs can extend the lifespan of the motor and reduce maintenance costs. VFDs can also provide soft starting and stopping of motors, which reduces mechanical stresses and extends the life of other components such as belts, couplings, and bearings.

3. Precise speed control

VFDs offer precise speed control, allowing the motor to operate at a range of speeds. This is particularly useful in applications where the motor needs to operate at different speeds.

4. Improved Safety

VFDs with safe torque off (STO) are becoming common in newer models, providing the most basic integrated safety circuit for a drive. STO ensures the VFD cannot generate any torque to the motor and prevents starting if an unsafe condition exists.

Advanced Features

Some VFDs include logic features and additional input/output control signal capabilities on-boarded to enable increased safety and performance. Speed profile and multiple speed steps can be optimized for equipment and products.

 

Applications of Variable Frequency Drives

1) VFDs have a wide range of applications across different industries. They are commonly used in HVAC systems, pumps, fans, and other types of electric motors. VFDs are particularly useful in applications where the motor needs to operate at different speeds, or where precise speed control is required.

2) In HVAC systems, VFDs are used to control the speed of fans and pumps. By adjusting the speed of these components, VFDs can reduce energy consumption and improve overall system performance. VFDs can also help to reduce wear and tear on the motor and other components, thereby extending their lifespan.

3) In industrial applications, VFDs are used to control the speed of conveyors, mixers, and other types of machinery. By adjusting the speed of these machines, VFDs can help to optimize production processes and improve energy efficiency.

 

Conclusion

Variable frequency drives are an excellent way for businesses to reduce their energy consumption and cut down on their utility bills. With their ability to improve the reliability and lifespan of electric motors, as well as their ability to provide greater control over the speed and torque of the motor, VFDs are an excellent investment for many industrial and commercial applications. However, it is important to work with a qualified technician to select the appropriate VFD for your application, install it correctly, and maintain it over time.