Research On The Generator Of Buoy-Rope-Drum Wave Power Device

In the now world, with the increasingly serious energy crisis, the world pays more attention to the new energy industry. Our country has a vast sea area, and there is extremely abundant marine energy. As a new kind of renewable clean energy, the marine energy has been rapidly developed in the recent years. Now, it has become an important part of our country’s new energy strategy.The thesis topic is derived from the project of Buoy-rope-drum wave power technology research and experiment which is funded by the National Renewable Energy Special Fund. The Buoy-rope-drum wave power device possesses the characteristic of low driving speed and intermittent work. Based on the characteristic of the device, to get a higher efficiency, the Buoy-rope-drum wave power generator’s structure and the electromagnetic parameters are researched and designed. This paper’s research content has important theoretical and practical significance for the completion of the project.The research content is as follows:1. According to the principle of Buoy-rope-drum wave power device, after research and analysis, the structure scheme of the generator which is double generators symmetrically arranged, inner rotor and direct-driven is designed. The generator is set to be permanent magnetism.2. The generator’s rated parameters are designed according to the Buoy-rope-drum wave power device’s structure. Its low speed is implemented on multi pole and low frequency. Design the generator’s electromagnetic structure. The rotor is designed to be hollow to shorten the generator’s start-up time. Optimize the pole’s sizes. Design the generator’s electromagnetic parameters. Double-layers-and-short-pitch winding with fractional slot is selected in order to reduce the generator’s starting resistant moment. Research the combination of pole number with slot number, and two different schemes of generators are designed, one has ninety-three slots, another has one hundreds three slots.3. Calculate the voltage regulation factor, starting resistant moment and the efficiency of the two schemes’ generators. Simulate analysis these parameters with the Rmxprt software too. Research their pitches. Select the optimal scheme.4. Do no-load analysis and load analysis of the generator’s optimal scheme with Ansoft Maxwell software. Analysis the flux density and flux’s field, analysis the cogging torque, calculate its ratio with the electromagnetic torque. Analysis the no-load introduced voltage’s waveform distortion rate. Design the external circuit, analysis the generator’s external characteristic. Calculate the output power. Analysis the electromagnetic torque’s fluctuation amplitude.