Briefly, the invention involves a system and method for generating electrical power. The system includes an electromagnet positioned with one pole directed toward a like pole of a permanent magnet. The permanent magnet is preferably mounted for oscillating movement toward the pole of the electromagnet. A control system for the electromagnet is provided to supply direct current (DC) power in the form of square wave pulses which coincide with the position of the permanent magnet. Power is collected upon the collapse of the magnetic field within the electromagnetic magnet. In some embodiments the present device is supplied in the form of a reciprocating engine which provides rotary motion in addition to the electrical power generated.

Briefly, the invention involves a system and method for generating electrical power. The system includes an electromagnet positioned with one pole directed toward a like pole of a permanent magnet. The permanent magnet is preferably mounted for oscillating movement toward the pole of the electromagnet. A control system for the electromagnet is provided to supply direct current (DC) power in the form of square wave pulses which coincide with the position of the permanent magnet. Power is collected upon the collapse of the magnetic field within the electromagnetic magnet. In some embodiments the present device is supplied in the form of a reciprocating engine which provides rotary motion in addition to the electrical power generated.

A device for generating electrical energy from mechanical motion includes a surface float and at least one force modifier disposed at least partially within the interior of the surface float, the force modifier to receive an input force at a pumping cylinder and apply a modified force to a generator through a driving cylinder. The pumping cylinder or the driving cylinder is a tandem cylinder.

Provided is a swing-enhanced vibration energy harvesting device including a housing, a coil assembly, and a magnetic field generator. The magnetic field generator generates a magnetic field capable of passing through the coil assembly. The coil assembly reciprocates linearly with respect to the housing and the magnetic field generator under the action of an external vibration. The coil assembly can drive the magnetic field generator to swing with respect to the coil assembly. Alternatively, the magnetic field generator reciprocates linearly with respect to the housing and the coil assembly under the action of the external vibration. The magnetic field generator can drive the coil assembly to swing with respect to the magnetic field generator.

Provided is a swing-enhanced vibration energy harvesting device including a housing, a coil assembly, and a magnetic field generator. The magnetic field generator generates a magnetic field capable of passing through the coil assembly. The coil assembly reciprocates linearly with respect to the housing and the magnetic field generator under the action of an external vibration. The coil assembly can drive the magnetic field generator to swing with respect to the coil assembly. Alternatively, the magnetic field generator reciprocates linearly with respect to the housing and the coil assembly under the action of the external vibration. The magnetic field generator can drive the coil assembly to swing with respect to the magnetic field generator.

Vibration energy harvesting systems are described herein. In one example, a system includes a first structure having a coil, a second structure having a magnet, and a coupling structure connecting the first structure to the second structure.

Vibration energy harvesting systems are described herein. In one example, a system includes a first structure having a coil, a second structure having a magnet, and a coupling structure connecting the first structure to the second structure.

An electronic wristwatch that uses a logic unit (42) to control a time display (50, 54) and has a controller (48) that connects wirelessly to external devices (90) or to the internet (99). An energy harvesting system (25) captures energy created by the user's motion and stores it into a battery (30) or in a capacitor (32), from which it is used to power the logic unit, controller, and wireless. Multiple functioning modes of different energy consumption allow the wristwatch to keep time for more than one hundred days without being worn.

An electronic wristwatch that uses a logic unit (42) to control a time display (50, 54) and has a controller (48) that connects wirelessly to external devices (90) or to the internet (99). An energy harvesting system (25) captures energy created by the user's motion and stores it into a battery (30) or in a capacitor (32), from which it is used to power the logic unit, controller, and wireless. Multiple functioning modes of different energy consumption allow the wristwatch to keep time for more than one hundred days without being worn.