LT5458B - Method for changing mechanical auto-oscillation energy to electrical energy - Google Patents

Abstract

The invention relates to energetics. Method for changing of mechanical auto - oscillation energy to electrical energy characterized in that elastically fixed mechanical element is acted additionally by excitation power and creates electric voltage changeable under frequency of electric network.

Description

The invention relates to the field of power generation, in particular to autonomous, continuously renewable wind, water, air flows, etc. the methods of converting the mechanical energy of auto-vibrations caused by sources to electricity. This enables the creation of autonomous power sources.

There is a known wind energy unit that converts wind energy into electricity in the following way: the piezo-converter is intense oscillating due to the air vortices created by the peripheral parts of the unit's blades, thus generating electricity. To increase the potential difference, a configurator is used which increases the pressure on the piezo-converter (see SU patent No. 1231253, F 03 D 5/06, 1986).

There is a known method of converting airflow energy into electricity using a piezo effect in which a mechanical subsystem with piezoelectric elements is excited by the airflow and the oscillations in the exchange subsystem are converted into electricity (see V.Volkov's article "Built-in Inspection Using Mechanical Energy Converting Elements" -proc. of IMECE'03.2003 ASME Int. Mechanical Engineering Congress, Washington 2003).

In the given method of converting airflow energy to electricity, the electricity generated using the piezo effect is from an indefinite load, an indefinite frequency of generated energy and an indeterminate motion law, which makes it practically difficult to apply the method to a continuous power supply. Additional, costly, difficulties arise from transforming a permanent electrical stand into a variable one.

The object of the present invention is to simplify and reduce the cost of converting autonomous, continuously renewable energy sources into electricity.

It is an object of the present invention to provide a method for converting mechanical auto-oscillatory energy into electrical energy based on the external effect of continuously renewable energy sources such as wind, water, air flow, etc. into a resiliently mounted mechanical element whose auto-oscillatory energy is converted into electrical energy, where the mechanical element of the elastic additionally acts on the excitation force of a synchronized, mains frequency, and generates an electrical voltage varying according to the mains frequency.

Fig. -2Z is a block diagram of a method of converting mechanical auto-vibration energy into electricity, showing the excitation 1 generated by a continuously renewable energy source (wind, water, air flow, etc.); unit 4 and power strip unit 5.

The method is realized as follows.

Wind, water, air flow, etc. 1 acts on a mechanical member 2 which is rigidly attached and causes its oscillation. At the same time, a force F (t) = Fsin (wt + cC) is applied to the mechanical member 2, where:

F is the amplitude of the alternating force, N;

w - circular frequency corresponding to mains frequency, rad./s;

t - time, s;

oL- Vibration phase, rad., frequency synchronized with mains frequency. A small synchronized excitation can be generated by an electric current generator that can be rotated off-line from a power grid, such as a diesel engine. This is true in remote areas where there are no grid systems such as the North Pole, deserts, etc. Since continuously renewable energy sources such as wind, water, air flow occur at various frequencies, the effect of the mechanical element 2 on the synchronous excitation frequency due to the dynamic effect causes the mechanical element 2 to draw the frequencies of the oscillations to the synchronous excitation frequency. . The energy of the synchronized mechanical oscillations, in the power conversion unit 4, is converted into electricity, which is then removed in the electrical removal unit 5. The electricity thus generated does not require any additional, costly conversion to the required frequency.

Compared to the prototype, the new technical solution, thanks to a small synchronous excitation frequency equal to the mains frequency, enables the generation of defined-frequency electricity from continuously renewable sources, while simplifying and saving the costly conversion to the required frequency electricity.

Claims (1)

DEFINITION OF INVENTION A method of converting mechanical auto-vibration energy into electricity based on the external effects of continuously renewable energy sources such as wind, water, air flow, etc. into a resiliently mounted mechanical element whose auto-oscillatory energy is converted into electrical energy, in that the attached mechanical element is additionally actuated by an excitation force of a synchronized, mains frequency, and generates an electrical voltage varying according to the mains frequency.