College Internship ppt presentation .pptx

Intership report

1. SAVITRIBAI PHULE PUNE UNIVERSITY     INTERNSHIP REPORT   Presented By Ms. VAISHNAVI VASANT VADAHNE   Under the Guidance of Dr. S.T. Sanamdikar

2. T.E (INSTRUMENTATION AND CONTROL ENGINEERING) DEGREE OF SAVITRIBAI PHULE PUNE UNIVERSITY     Academic Year 2023-24

3. INTRODUCTION Vishay Components is a global manufacturer of semiconductors (diodes, MOSFETS, and optoelectronics) and passive electronic components (resistors, inductors and capacitors). The Vishay journey began with one man, Dr. Felix Zandman , and a revolutionary technology. From there we would grow and strengthen over decades, arriving where we are today: one of the world’s most trusted manufacturers of electronic components. From discrete semiconductors to passive components; from the smallest diode to the most powerful capacitor, Vishay’s breadth of products is the very foundation that brings modern technology to life, every day, for everyone . We call it The DNA of tech.®

4. INTRODUCTION Capacitor: A Capacitor is a device that stores electrical energy in an electrical field by accumulating electric charge on two closely spaced surfaces that are insulated from each other. It is a passive electronic component with two terminal. Esta is Capacitor Manufacturing division which produce following type of capacitors: • Low voltage application capacitor (LVAC ) • Power Electronic capacitor in Tubular construction (PECT ) • Power Electronic capacitor in Rectangular construction (PECR)

5. Applications: • Railways application • Induction furnaces • Power Grid • Capacitive Discharge units • Power factor correction capacitors • Batteries • EV application

6. TYPES OF CAPACITOR PEC TUBULAR • Winding • Metal spray • Cell tempering • Cell soldering • Cell curing • Cap & Aluminium Can notching • Wound cell assembly • Curling • Resing filling in 3 steps • High voltage testing • Cap & TanD measurement at 53Hz • Final packing PEC RECTANGULAR Winding • Metal spray • Cell testing • Cell soldering • Assembly & insulation • Pre-testing • Welding of top cover • Leakage testing • Drying • Resin filling • Final testing • Shot blasting • Final assembly

7. PEC RECTANGULAR OVERALL PROCESS STAGE 1 : WINDING ➢ REQUIRED MACHINE & MATERIALS A. MACHINES • WINDING MACHINE • BINDER OVENS B. MATERIALS • MPP FILM • COVER FILM • ALUMINIUM FOIL • CORE C . INSTRUMENT • VERNIER CALIPER

8. ➢ DRYING THE WINDING CORE • The winding core must be dried in the oven before they are processed . • CORE LENGTH: length ± 0.30mm eg : 101.8 ± 0.30mm • FIRST CYCLE : Initially all the cores are to be kept in the oven at 105 ± 5ºc for duration of Min : 6 hrs & Max : 9 hrs . • SECOND CYCLE : When cores are stored in a second oven at 40 ± 5ºc until they are required on the winding machine.

9. STAGE 2 : METAL SPRAY AND CELL CLEANING In this process the spraying of zinc metal layers on MKP winding cell is done.The application of the zinc layer takes place at both facilities by two zinc sprayers ( CAP 300) with subsequently switched metal spraying .

10. STAGE 3 : CELL TESTING ➢ REQUIRED MACHINE & MATERIALS • Measurement of C & Tan D at 1 khz • Transformer AC 100-300VAC • Testing source DC 0-12.5kv/800Ma • Wound cell , printer Ink • Jig

11. STAGE 4: SOLDERING AND ASSEMBLY In this stage complete manufacturing of PEC rectangular capacitors, produced winding cell are stacked and then soldering is done. Soldering copper wire are used to connect the winding cells. At the covering working stage the cover is taken out at the assembly working place and the PT100/PT1000 sensors are placed

12. STAGE 5: RESIN FILLING During the filling operation machine always run into high pressure. When the component level is below 10% then top up of component is required inside the tank. For top up of component replenishment of premix tank and hardener tank is done. For loading of component castor oil PPM level is added with 300 litre of castor oil top up from de-humidification tank to premix tank 1 and premix tank 2 with discharging process

13. STAGE 6 : FINAL TESTING In this stage the objective is to measure the partial discharge between the terminals and the capacitor case using the PD smart measurement system . Calibrator placed on the controlled unit with exceptional arrangement & proxy sensors. Proxy sensor circuit connected to the same power supply . If the calibrator placed in this arrangement proxy sensor loop completed and power supply get it in ON condition

14. CONCLUSION In conclusion, my three-month internship at Vishay Components Pvt. Ltd. has been an incredible learning experience in the field of instrumentation and automation. I had the opportunity to observe and learn about the various processes involved in capacitor production, from the raw material handling to the finished product. .

15. Thank you