Provided is a rotary electric machine including: a permanent magnet rotatable around a first rotational shaft and disposed at a distance from a main surface of a moving body rotating or moving, at least a part of a side surface of the permanent magnet continuous to an outer peripheral surface thereof being opposed to the main surface of the moving body, wherein the permanent magnet is rotated around the first rotational shaft by a reaction force acting on the permanent magnet, the reaction force being caused by eddy currents produced in the main surface of the moving body in such a direction as to hinder a change of magnetic flux from the permanent magnet, and a surface speed of the side surface of the permanent magnet opposed to the moving body is lower than a surface speed of the main surface of the moving body opposed thereto.

An apparatus includes first and second tanks each configured to receive and store a refrigerant under pressure. The apparatus also includes a cylinder defining a space configured to receive the refrigerant from the first and second tanks. The apparatus further includes a piston passing into the cylinder and having a head, where the head divides the space within the cylinder into a first volume for the refrigerant from the first tank and a second volume for the refrigerant from the second tank. In addition, the apparatus includes a converter configured to translate linear movement of the piston into rotational motion and a generator configured to produce electrical power based on the rotational motion.

A device, system, and method for providing electrical power to an electrically isolated region utilizing an electrically insulating drive shaft to transmit rotational energy over an electrically isolated gap to an electrical generator disposed in the electrically isolated region. Electrical power generated by the generator is used to power at least one electronic device in the electrically isolated region or to charge a battery, while maintaining electrical isolation.

An inverter type engine generator includes an alternator; and a converter composed of the a three-phase rectifying bridge circuit including an upper and lower three sets of elements, and converting three-phase alternating current output from the alternator into direct current. The upper and lower three sets of elements of the three-phase rectifying bridge circuit of the converter are configured such that upper elements are configured at least from duty-controllable diode elements, and lower elements are configured at least from duty-controllable switching elements having diodes.

A sensorized roller for a bearing includes a bore that extends through the roller, a sensor for measuring at least one physical state of the roller bore and producing a first signal indicative of the measured physical state, a wireless transmitter for receiving the first signal from the sensor and wirelessly transmitting a second signal based on the first signal, and a generator configured to be rotated by a movement of the roller, the generator being electrically connected to the sensor. The measuring unit, the wireless transmitter and the generator are located inside the bore.

A road traffic and wind energy cogeneration system, comprising an energy conversion device and a road bearing mechanism, wherein the road bearing mechanism has a container, the container includes a case and a top cover; a piston is disposed in the case; an elastic chamber is disposed between the piston and a bottom wall of the case; the elastic chamber is filled with liquid; a guide column is fixed to the piston; the guide column penetrates upwards through the top cover to be fixed to a road pressure plate; an elastic mechanism is disposed between the piston and case bottom; an air cavity is formed between the top cover and piston; tire air cavity is connected to the wind power installation through the conduit; the elastic chamber is connected to a water flow power installation through the conduit.

An electric motor-generator and method of use including a bowl-shaped coated copper windings electromagnet (50M), a bowl-shaped coated copper windings generator coil (50G), a spheroidal shaped super magnet and axle rotor unit (20) having one or a plurality of super magnets assembled together to form an approximately spheroidal shaped super magnet fixedly connected around an axle (30), and, an electric circuit (310) configured in such a way as to repetitively pulse and reverse direct current to the bowl-shaped coated copper windings electromagnet and connect to a power source. The bowl-shaped coated copper windings electromagnet is configured to repetitively repel the approximately spheroidal shaped super magnet when pulsed reversing direct current is applied, and the approximately spheroidal shaped super magnet is configured to rotate within the cavities of both the bowl-shaped coated copper windings electromagnet and the bowl-shaped coated copper windings generator coil, whereby alternating current is produced.

A power supply system installed on a rotating object includes: a power generation device, and a power management device for converting the electric power output by the power generation device to adapt to load requirements, in which the power generation device includes a rotor installed on and fixed to the rotating object, the rotor including at least one induction coil, and a stator which is rotatable relative to the rotor, the stator including at least two magnetic poles; the stator includes a stator case and a counterweight block, and the stator case surrounds the rotor from the circumferential direction of the rotor, and is closed in the circumferential direction; and the counterweight block is fixedly arranged at one side of the stator case, and the angle of the counterweight block in the circumferential direction is in the range of less than or equal to 180 degrees.

A power generation system is provided including a power boost regulator operative to provide load matched voltage operation of an AC power source.

A plurality of energy-generator pods, and methods of use, are provided along a rotatable tubular string extending downhole from surface into a wellbore. In embodiments, rotation of the tubular acts as a rotor of the pod and an outer component about the tubular, capable of relative rotation thereabout, forms the stator. The pod can also be equipped with bi-directional wireless electronic data communication including communication uphole to surface from sensors downhole, pod-to-pod, and down-hole communication to downhole tools. Pods can be fit to centralizers already employed for rotary tubular strings, the centralizer portion engaging the wellbore and remaining stationary relative to the rotating centralized tubular.