145 results about "Wave motor" patented technology

An impulse-type “wave motor” employs a seabed-mounted or supported structure mounting a wave energy absorbing panel on a hinged lever arm for reciprocation motion to obtain optimal absorption of wave energy from wave motion in the sea. For deepwater wavelengths of L, the panel is optimally positioned in a region within L / 2 depth from the sea surface. The panel motion is coupled by a connecting rod to a fluid pump which generates a high-pressure fluid output that may be used to drive a reverse osmosis desalination unit or to produce other useful work. Seawater or brackish water may be desalinated through reverse osmosis membranes to produce water quality for consumption, agricultural, or other uses. The submerged operating environment of the device in a region of one-half the design wavelength provides the maximum available energy flux and forced oscillations. The pump may be of the positive-displacement piston type, plunger type, or multi-staging driver type, or a variable volume pump.

A vibration wave motor includes a vibrating plate having a rectangular surface; a piezoelectric device bonded to the vibrating plate, and configured to vibrate at high frequency; and a projection provided on the vibrating plate or the piezoelectric device. In the vibration wave motor, a natural vibration mode, which has a resonant frequency equal to or adjacent to a resonant frequency of torsional vibration in a natural vibration mode under a state in which the vibrating plate, the piezoelectric device, and the projection are integrated, is a natural vibration mode of bending vibration in a direction parallel to or orthogonal to a torsion center axis of the torsional vibration in the natural vibration mode. The projection is provided at a position closer to an antinode than to a node, which are in the direction orthogonal to the torsion center axis of the torsional vibration in the natural vibration mode.

Provided is a vibration wave motor including a pressurizing mechanism and a guide mechanism which are used for a moving member and can be thinned. The influence of a restoring force can be eliminated. The vibration wave motor includes an elastic vibration member which is composed of a permanent magnet and a piezoelectric element which are fixed to each other, a plurality of motion extraction portions provided on the permanent magnet, and a moving member which is pressurized to be in contact with the plurality of motion extraction portions. A closed magnetic circuit of a magnetic flux is formed to connect between the elastic vibration member and the moving member through the plurality of motion extraction portions. A flow direction of the magnetic flux passing through the moving member is aligned with a moving direction of the moving member.

Provided are a motor driving method, a program therefor, and a motor driving apparatus which can shorten starting time of a vibration wave motor. A driving circuit of the vibration wave motor includes a control unit. The control unit controls two-phase driving voltages applied to an electro-mechanical energy conversion element of the vibration wave motor. The control unit controls a phase difference between the two-phase driving voltages to drive a driven member at a predetermined speed in a fixed state of frequencies of the two-phase driving voltages. In this case, when the phase difference is set outside a predetermined range, the control unit changes the frequencies of the two-phase driving voltages.

A driving device having a vibration element, a friction member, and a pressing member for applying pressure in a direction in which the vibration element and the friction member make contact with each other, causing the vibration element and the friction member to make a relative movement by vibration generated in the vibration element. The device includes a connection member configured to transmit a driving force caused by the relative movement to a holding member of another member, wherein the holding member makes a movement caused by the transmitted driving force, and a guide member configured to guide the holding member in a moving direction when the vibration element and the friction member make the relative movement. The connection member connects the holding member to the vibration element or the friction member so as not to apply a reaction force caused by the pressing member to the holding member.

A piezoelectric motor having a stator in which piezoelectric elements are contained in slots formed in the stator transverse to the desired wave motion. When an electric field is imposed on the elements, deformation of the elements imposes a force perpendicular to the sides of the slot, deforming the stator. Appropriate frequency and phase-shifting of the electric field will produce a wave in the stator and motion in a rotor. In a preferred aspect, the piezoelectric elements are configured so that deformation of the elements in the direction of an imposed electric field, generally referred to as the d33 direction, is utilized to produce wave motion in the stator. In a further aspect, the elements are compressed into the slots so as to minimize tensile stresses on the elements in use.

The Wave Generator Power Plant converts the energy in sea waves into electricity. The wave motor portion of the power plant utilizes a buoyant, moving, semisubmerged, cone-shaped pontoon that is powered by the sea wave motion. The reciprocation is changed to rotary motion by a connecting rod and crankshaft. Then, through a gearbox, the rotary motion drives an electrical generator. The fully submerged, stationary, buoyant, ring-pontoon is anchored to the sea floor by sixteen (16) cables. Also, sixteen (16) columns connecting to it, support the upper above-water structure. The assembly, is a moving buoyant pontoon, reciprocating within an anchored ring-pontoon. Optimum operation takes place in sea waves of adequate height and period that can lift and drop the moving cone-shaped pontoon relative to the design mechanical requirements. Sea wave energy, through the design of this invention, is amassed to develop sixteen hundred (1600) horsepower and generate one ((1) mega-watt of electricity.

A driving device having a vibration element, a friction member, and a pressing member for applying pressure in a direction in which the vibration element and the friction member make contact with each other, causing the vibration element and the friction member to make a relative movement by vibration generated in the vibration element. The device includes a connection member configured to transmit a driving force caused by the relative movement to a holding member of another member, wherein the holding member makes a movement caused by the transmitted driving force, and a guide member configured to guide the holding member in a moving direction when the vibration element and the friction member make the relative movement. The connection member connects the holding member to the vibration element or the friction member so as not to apply a reaction force caused by the pressing member to the holding member.

The invention discloses a water bucket type wave motor. The water bucket type wave motor comprises a rotor and water buckets, wherein the rotor is cylindrical or annular, the water buckets are evenly distributed at the external circle of the rotor in the peripheral direction, each water bucket is of a water tank structure, openings of the water buckets are sequentially arranged along the periphery, the axis of a rotor shaft is slightly higher than the water surface and is parallel with the water surface, and the axis of the rotor shaft is roughly parallel with the bank. A one-way valve is installed on the lateral wall of each water bucket and corresponds to the opening of the corresponding water bucket, water can only enter through each one-way valve, and a water outlet is near the outer side of the bottom surface of each water bucket. Each water bucket is simple in structure, low in manufacturing cost and high in reliability. Due to the fact that the water bucket type wave motor directly collects and utilizes the potential energy of waves and floating force of water to drive the water buckets on the rotor to move for power generation, the wavy energy does not need a middle conversion procedure, and the utilization rate is high. If the geometric size of each water bucket is designed to be small, small broken waves can also be utilized.

Provided is a stacked type piezoelectric element including a surface electrode layer as a first layer and a piezoelectric layer as a second layer. A third layer to an N-th layer thereof are formed by alternately arranging piezoelectric layers and piezoelectric layers. A surface of the piezoelectric layer is provided with four-way split inner electrodes S+, B+, A−, and B−. A surface of the piezoelectric layer is provided with four-way split inner electrodes AG+, BG+, AG−, and BG−. A surface of the piezoelectric layer is provided with four-way split inner electrodes of A+, B+, A−, and B−. The piezoelectric layers are formed such that only the inner electrode S+ serving as a sensor phase and the inner electrodes A+ and AG+ being arranged in the same phase as the inner electrode S+ are exposed to an outside of the piezoelectric layer.