Wave power transmission device and its control method based on variable stiffness harmonic gear

Abstract

The invention relates to a wave power generation transmission device base on a stiffness-variable harmonic gear. The wave power generation transmission device is used for transmission between a wave power generation device and a permanent magnet synchronous generator, wherein the wave power generation device and the permanent magnet synchronous generator are connected through a connecting shaft (12). The wave power generation transmission device comprises the harmonic gear, a base (7) and a stiffness-variable control mechanism (8). The stiffness-variable control mechanism (8) comprises a round disc (11), a plurality of springs (5) with the same elasticity and length, a plurality of stepping motors (6) outputting the same power, and two encoders (10), wherein all the springs (5) are connected between a steel wheel (3) of the harmonic gear and the round disc (11), the stepping motors (6) are fixed to the base (7) and used for rotating the round disc (11), and the springs are in an equilibrium position when parallel to the connecting shaft. The wave power generation transmission device base on the stiffness-variable harmonic gear enables a wave power generation transmission system to run stably, and enables the transmission efficiency of the wave power generation transmission device to be improved.

Description

Technical field [0001] The invention belongs to the field of electric transmission, and in particular relates to a transmission device. Background technique [0002] Ocean wave power generation is a promising renewable energy power generation, which has attracted the attention of countries all over the world in recent years. my country is a large oceanic country. From the Bohai Sea, the Yellow Sea, the East China Sea to the South China Sea, the total area of ​​the ocean exceeds 4.7×10 6 km 2 , In addition, there are more than 7,000 islands, and the coastline is more than 18,000km long. According to the observation of relevant departments, the wave energy density in my country's sea area is about 2-5kW / m, which shows that my country has abundant wave energy available. The transmission system is an important part of the wave power system, and its performance has a great influence on the stable operation and output power fluctuation of the wave power system. There are two t...

AI Technical Summary

Problems solved by technology

This kind of flexible transmission shaft has small stiffness and good transmission stability, but it takes more time to track wave changes, the transmission efficiency is low, and the frequency band width of the wave power generation system is reduced, making the dynamic performance of the wave power generation system worse.

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