Air Taser electrical specifications
This page describes the theory and design of air taser
technology. If you've ever wanted to know how how air tasers work or
how many watts or joules the thing puts out, this is the place to be!
Air Taser - Electrical Theory of Operation
The system uses a single 9-volt alkaline battery as the
input source and a simple switching circuit feeds an inverter transformer,
is rectified to a DC voltage and charges the output capacitor (.22 uF) to
a maximum of 2,000 Volts DC. Once the output capacitor reaches 2,000 VCD,
the energy is discharged through a spark gap directly into the output
coil. The output coil multiplies the voltage and generates the loaded
output discharge as discussed below.
Electrical Output Energy
The AIR TASER generates 10-15 pulses per second. Each pulse
is approximately .4 Joule. Calculated by 0.5 * C * V ** 2 or 0.5. *
.00000022 F * 2000 V ** 2 = .4 Joule. AT 15 pulses per second and.4 Joules
per pulse, 6 Joules per second is the maximum delivered energy per
Loaded Output Discharge
When the output is connected to a 4,000 Ohm load, each
individual pulse of 3.5 uS (.0000035 second) in duration and measures
23,600 volts DC peak with a peak current of 5.9 Amps. The DC waveform is
1ò2 sinusoidal. The time-averaged current is .00022 Amps. The maximum
average power output of the AIR TASER is 6 Watts.
Electrical Test Setup
The output of the AIR TASER is measured by connecting a
4,000-Ohm wire would 5 watt resistor submerged in mineral oil (for
insulation) across the output leads. A high-speed (150-MHz) digital
Oscilloscope (Tektronix 320) and a high voltage probe are also connected
across the outputs.
The peak current is calculated to be 5.9 Amps.
(Amps) = E (Volts) / R (Ohms) ; 23,600/ 4,000 = 5.9 Amps).
power is calculated to be 139,240 Watts
P (Watts) = I (Amps) * E
(Volts) ; 5.9 * 23,600 = 139,240).
Average power is derived as
Multiplying by .707 averages the sinusoidal waveform (to an
Average Power = P (peak Watts) * F (pulses per
second) * T (seconds) * A (waveform averaging conversion).
Power = 139,240 Watts (peak) * 15 pulses per second *0.0000035 seconds *
.707 (sinusoidal averaging conversion).
Average Power = 5.16 Watts
A 15% margin is added for conservatism, therefore 1.15 * 5.16
= 6.0 Watts Average.
Ballistic Impact Power
Each of the two AIR TASER projectiles is expelled from the
unit at a maximum velocity of 60 meters per second. Each projectile weighs
1.75 grams. 1 Joule = 10198.8 Gram-cm/sec. Therefore the impact energy is
1.03 Joules. The impact area is .30 cm2 circular. The equivalent energy
per unit area is therefore 3.43 Joules/cm2.
AIR TASER Operational
Specifications March 26, 1996
Taken from Air Taser Specs