Electromagnetic Coilgun

Project Title

Electromagnetic Coilgun

Project Area of Specialization RoboticsProject Summary

Electromagnetic launchers are revolutionizing the fields of weaponry and space missions. The basis of this project is to design and implement an Electromagnetic coil-gun using a 9volt battery. This project carries out the systematic quality of Coilguns as handy-gun with a small sized bullet. A coil-gun used magnetic force propellant with periodic input is kind of complicated to model. It involves time variable inductance and capacitance, a projectile in motion and field of force that changes with the motion of projectile inside the coil-barrel. Moreover, it is further affected by many different physical parameters. Coil gun was implemented using the split coils technique to lower the effect of inductance on the shape of the current pulse. The electromagnetic coil-guns model was simulated using MATLAB and PSpice. A coper-wire of 19 AWG and projectile of mild-steel material with diameter and length equal to the coil was used. The projectile attains Kinetic Energy by using the bank of a capacitor of 3400uF having a charging voltage of about 400-V and stored Electrical capacitive energy of 272J.  Unlike the previous works, this project focuses on generating 400 DC volts from the 9volt battery using a boost converter. Implementation of a speed measuring screen for finding the accurate speed of the projectile is also a part of the project.

Project Objectives

The goal of this project is to develop a modified design for a single stage 240-J Reluctance type coil-gun for a 30-mm in length, 8-mm in diameter, 10gram bullet with high efficiency and speed. The following objectives were set to achieve this goal.

• Literature Review
• Development of a simple single-stage Coilgun based on a conventional idea by splitting the coil.

• Modeling and simulation of Coilgun operation for an in-depth study of the design parameters

• Choice of parameters for the conventional design using the simulations
• Working on the improvement of the Coilgun design with novel ideas
• Hardware implementation of the improved design
• Testing and evaluation

Project Implementation Method

This project covers the design of an improved Reluctance-type Coilgun with a modified LC-circuit. A conventional Coilgun (with a capacitor bank based pulse generator) was also designed for reference comparison.

Benefits of the Project

Their potential advantages over conventional guns include the following.

• Higher firepower: This ensures a greater velocity and range.
• Used in aircraft carriers and space shuttle launches.
• Elimination of chemical propellant: This can reduce cost
• It is more environmentally friendly (electrical energy used).
• Mechanically simple: They are better for unmanned operation.
• No sound.

Technical Details of Final Deliverable

Switching circuit

SCR is used for switching in this project because:

1. It is easy to turn ON.
2. The Triggering circuit for silicon controlled rectifier (SCR) is simple.
3. It is simple to control.
4. It cost is low.
5. It can handle large voltage current and power. Bullet:

A wide range of options was available in choosing coil and bullet dimensions and geometry

Free-wheeling diodes:

Free-wheeling diodes need to be connected in the circuit as there is a chance of backflow of current due to the high value of inductances attached

Charging Circuit:

Charger circuit simply has electrical devices like other diodes, capacitors, resistance, etc. that step down the ac provided then filters create the output smooth then resistance create output compatible with a device.

Our work is also based on the speed measurement device. It will measure the accurate speed of the bullet in real life.

Speed Measurement Device:

There are two parts of the device describes the following:

• Transmitter
• Receiver
• 

Final Deliverable of the Project Hardware SystemType of Industry Security Technologies OthersSustainable Development Goals Affordable and Clean EnergyRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	71240
Arduino	Equipment	1	1900	1900
Raspberry	Equipment	1	8000	8000
Lm358	Equipment	2	10	20
ic base	Equipment	2	3	6
cap 10 uF	Equipment	2	2	4
cap 780uF	Equipment	2	300	600
Bullets	Equipment	8	3000	24000
lm311	Equipment	10	30	300
-lm317	Equipment	7	20	140
Vero Board	Equipment	2	80	160
resistors	Equipment	2	30	60
Cap 2200uF	Equipment	2	800	1600
1n5408	Equipment	4	50	200
1n4007	Equipment	10	10	100
c1061	Equipment	1	160	160
lm358	Equipment	17	150	2550
Coils wire	Equipment	1	150	150
RHRP30120	Equipment	6	150	900
80n60	Equipment	6	200	1200
capacitor	Equipment	4	200	800
resistor pack	Equipment	3	150	450
PBB10nF-Rx	Equipment	120	80	9600
TSUS6402-Rx	Equipment	100	70	7000
Laser Frame	Equipment	10	100	1000
7805	Equipment	5	120	600
7905	Equipment	5	135	675
cap 680uF	Equipment	1	475	475
transformer	Equipment	1	5000	5000
7909	Equipment	2	80	160
bridge rectifier	Equipment	2	140	280
A4 double side	Miscellaneous	40	25	1000
2x5china-Xstand	Miscellaneous	1	550	550
frame	Equipment	2	800	1600