Electromagnetic launcher with spiral guideway
View Patent ↗An electromagnetic launcher with a curved or spiral-shaped, open-ended guideway and conductors for launching a projectile. The projectile, movably retained on or within the guideway, is accelerated along the guideway using electromagnetic forces until it reaches an end of the guideway, then the projectile is launched in a desired direction. The direction of the launch of the projectile is determined by orienting the guideway in the desired direction using an actuator.
1. An electromagnetic launcher comprising:
a curve-shaped guideway made of non-conductive material having a jointed length that is disconnectable from a remainder of the curve-shaped guideway so that when the jointed length is disconnected a projectile accelerated in the curve-shaped guideway travels through an opening in the guideway created when the jointed length is disconnected from the remainder of the guideway, wherein the projectile travels in a direction tangent to a curvature of the curve-shaped guideway; and
conductive coils positioned on the curve-shaped guideway wound in a first direction, wherein the conductive coils are configured to be electrically connected to a power supply, such that the power supply provides an electric current to the conductive coils creating an electromagnetic field along the curve-shaped guideway for accelerating the projectile along the curve-shaped guideway;
wherein the projectile includes:
a solid object, and
rotor coils made of conductive material and positioned on the solid object and wound in a second direction, wherein the first direction and second direction may be identical or opposite directions; and
conductive contacts configured to movably support the projectile on or within the curve-shaped guideway and configured to supply electric power to the rotor coils and stator coils, the conductive contacts including:
a pair of rails comprising a positive rail and a negative rail that are positioned along the curve-shaped guideway;
two sets of connectors comprising
a first set of connectors configured for connecting a first end of the rotor coils to the positive rail and a second end of the rotor coils to the negative rail so that an electromagnetic field is induced due to a current traveling through the rotor coils on the projectile, and
a second set of connectors connecting a first end of the stator coils to the positive rail and a second end of the stator coils to the negative rail so that the second set of connectors activates one of the stator coils closest to the projectile so that an electromagnetic field is induced due to a current traveling through the stator coils.
2. The electromagnetic launcher of claim 1 , wherein the curve-shaped guideway is rotatable along one or more axes and thus configured to be tangentially pointed in a plurality of directions.
3. The electromagnetic launcher of claim 1 , wherein the projectile is positioned interior to the curve-shaped guideway and configured to be accelerated along the curve-shaped guideway due to the electromagnetic field via the conductive coils.
4. The electromagnetic launcher of claim 1 , wherein the stator coils are controlled by a controller configured for activating only a portion of the stator coils nearest to the projectile.
5. The electromagnetic launcher of claim 1 wherein the two sets of connectors are configured to independently switch polarities of the electromagnetic fields induced on the rotor coils or the stator coils.
6. The electromagnetic launcher of claim 1 wherein the conductive contacts comprise ball or cylindrical bearings to reduce friction and springs to absorb shock.
7. The electromagnetic launcher of claim 1 , wherein the projectile comprises at least one of a spacecraft, aircraft, payload, satellite, nail, train, artillery shell, ammunition, and amusement park ride.