A device for converting wave energy into electrical energy

 

(57) Abstract:

Usage: in the design of electric generators of oscillatory motion using energy waves. The inventive stator 1 of the device is made in the form of a hollow cylinder, and the movable element is in the form of an annular float 5, covering the stator 1 and is installed on its side surface with the use of pre-twisted and evenly distributed around the circumference of the stator 1 of the segments of the cable 8 attached to free ends of the stator 1 near one of its ends. 1 Il.

The invention relates to electrical engineering, namely for the construction of electric generators of oscillatory motion using energy waves.

A device for converting the energy of sea waves into electricity, are made in the form of a dynamoelectric generator set with rollers fixed on the pontoon rails rolling [1]

However, this device is characterized by the inconvenience of operation and non-compact design. In addition, the device has a low conversion efficiency of the oscillatory wave energy into electricity due to low velocities and frequencies for displacements of the rotors oscillatory movement, using energy, for example, sea waves, containing arc stator winding and the movable element in the form of a pendulum with excitation system, suspended on an axis coincident with the longitudinal axis of the generator [2, 3]

The disadvantage of these designs is the low conversion efficiency of the oscillatory wave energy into electricity, because of the small amplitudes and frequencies, and consequently, low linear velocities of the moving element relative to the stator when the swinging of the generator on the waves, the dependence of the rate of swinging from the position of the generator at each time point relative to the vector Mitrofanova load. It is obvious that the amplitude induced in the stator winding emf. swinging generator on the waves due to the low frequency waves and low-intensity extremely low, which leads to low efficiency of use of energy waves. In addition, these structures are of limited use, since they are afloat and must be elastic (using, for example, rope) connected with the bottom of the pond, dock, vehicle, etc. with the possibility of transmission through elastic connection of an electrical signal generator.

Naci generator vibrational motion [2] contains the arc sector with winding and a movable element with excitation system in the form of permanent magnets, elastically connected with the stator, with the possibility of relative displacement.

The disadvantage of this device is the low conversion efficiency of the oscillatory wave energy into electricity and limited use (see above).

The invention is directed to the conversion efficiencies of oscillatory wave energy into electricity and the expansion of the scope of the device.

This is achieved by a device for converting wave energy into electrical energy includes a stator in the form of a hollow cylinder with a winding, and a movable element with excitation system in the form of permanent magnets, made in the form of float annular shape concentric covering the stator and mounted on its side surface with the use of pre-twisted and evenly distributed around the circumference of the stator segments of rope attached to free ends of the stator near one of its ends.

The invention is illustrated in the drawing, which shows a General view of the device, combined with an axial slit.

A device for converting wave energy into electrical energy consists of a stator 1 with the coil 2,ritom the ends also non-magnetic caps 4, 5, and the rolling element (rotor) is made in the form of a plastic float 6 has a circular shape concentric with covering the stator 3 and containing the excitation system in the form of an annular permanent magnets 7, zaarmirovannyh in the body of the float 6. The float 6 is installed on the side surface of the stator 1 in the housing 3 with evenly distributed around the circumference of the stator 1 of the segments of the cable 8. Segments of the cable 8 is pre-twisted in different directions and attached one end to the float 6 and the other to one of the caps 5 on the end face of the stator 1 by pins 9. On the cover 5 are block 10 for removing emf. induced in the winding 2 of the stator 1, and the rack 11 with adjustable length and a hole for attaching the device to the supporting object (dock, vehicle, etc ). In the initial position of the device when twisted lengths of cable 8 in different sides of the float 6 is rotated at an angle, providing a state of static equilibrium float (sum of torques acting on the float 6 by cables 8, equal to zero).

The proposed device operates as follows.

Device with adjustable rack 11 is fastened to the supporting object so that the bottom I'm on the water. When you encounter a minimum of excitement on the water, the float begins to move, for example, upwards, the distance between the points of attachment of the ends of the twisted strands of the rope 8 is reduced, while the segments of the cable 8 begin to rapidly unwind-curl, ultimately, the entire system of ropes 8 float 6 takes a new position of static equilibrium, and the minimum rectilinear movement of the float 6 is of great angular movement of the float, and consequently a significant angular velocity of rotation of the magnets 7 relative to the stator 1 and the significant amplitude emf. induced in the winding 2. This movement of the float can be compared with the movement of the stick attached to the middle part of the rope, the ends of which are pre-twisted in different directions, periodically stretch and weaken. For the elastic transmission mechanisms of this type of gear ratio between angular and linear displacements reach values of the order of 1 to 5 Rev/mm, that is, the linear movement of the float 6 in units of millimeters cause its angular displacement, the measured number of revolutions, and, therefore, a significant angular velocity. At the same time for the period of oscillation waves (rather significant) float 6 will make the tilen-longitudinal stiffness of the cables 8. Thus, low-frequency oscillations of the waves even with minimum amplitude generate simultaneous complex longitudinal-torsional vibrations of a float 6 with large angular amplitude and high frequency. The presence of such oscillations naturally causes a significant linear displacement of the magnets 7 relative to the stator 1 with the coil 2 and, accordingly, a significant level of emf. induced in the winding 2. This dramatically increases the conversion efficiency of the oscillatory wave energy into electrical energy. In addition, the proposed device can be applied in almost any conditions: works in all intensities of waves; can be installed on the movable and immovable objects; the effectiveness of its action does not depend on the direction of the vector Mitrofanova load. The main part of the device with a stator and tokopriemnye device (coil 2 and the pad 10) is stationary, which eliminates the need for a flexible conductive links. Oscillations of the float 6 top and bottom limited by caps 4, 5. The selection of this distance between the covers 4, 5 (the maximum stroke of the float 6), the stiffness of the springs 8, the angle of their original winding and electromagnetic design parameters Le the Device will work with any intensity fluctuations of the waves, including and calm. For this by adjusting the length of the rack 11 in the initial state, the float 6 is dipped into the water, while the segments of the cable 8 through the ascent of the float 6 in the initial state, somewhat compressed, and the float has a definite angular position of static equilibrium. Naturally, under windless conditions there are fluctuations in the level of the water surface at least in a fraction of a millimeter. Due to these fluctuations occur linearly-torsional oscillations of the float relative to the position of static equilibrium.

It is necessary to emphasize the following. If in the known devices of oscillation of the moving element occur with a periodicity of waves, that is, rarely, in the proposed device, even after a single random wave disturbances occur free lineinternet fluctuations derived from the static equilibrium state of an elastic vibrating system that has continued to the new ward system to its original state of equilibrium.

A device for converting wave energy into electrical energy, containing the stator winding and the movable element with excitation system in the form of permanent magnets, elastically connected with RA, as the movable element in the form of float annular shape concentric covering the stator and mounted on its side surface with the use of pre-twisted and evenly distributed around the circumference of the stator segments of the torso, attached to free ends of the stator near one of its ends.

 

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