Cylinder type speed-changing linear permanent magnet generator used for wave power generation

Abstract

The invention discloses a cylinder type speed-changing linear permanent magnet generator used for wave power generation. The cylinder type speed-changing linear permanent magnet generator comprises a high speed rotor, a low speed rotor and a motor stator, wherein the high speed rotor, the low speed rotor and the motor stator are of a cylinder structure and arranged from outside to inside in a sleeving mode. A first air gap is formed between the high speed rotor and the low speed rotor. A second air gap is formed between the low speed rotor and the motor stator. The high speed rotor comprises a high speed rotor iron core. The inner surface of the high speed rotor iron core is provided with high speed permanent magnet pole pieces in a surface-adhering or embedding mode. The low speed rotor comprises magnetizers and non-magnetizers, wherein the magnetizers and the non-magnetizers are arranged at intervals in the axial direction in a staggered mode. The motor stator comprises a stator iron core. A stator iron core gear groove of the outer surface of the stator iron core is provided with stator coils in an embedded mode. The outer surfaces of the stator coils are provided with stator permanent magnet pole pieces in a surface-adhering mode. By means of cylinder type speed-changing linear permanent magnet generator, additional large-sized speeders are not needed to arrange in a whole wave power generation system, the volume is small, and the power capturing and power generating efficiency is high.

Description

technical field [0001] The invention relates to a cylindrical variable-speed linear permanent magnet generator for wave power generation, which belongs to the wave power generation technology. Background technique [0002] 70.8% of the earth is covered by oceans. Ocean energy is a renewable energy source with great potential for the world's growing electricity demand. Traditional rotary power generation systems inevitably require complex mechanical devices, such as water turbines or hydraulic pumps, to convert linear reciprocating wave motion into rotary motion, thereby driving a rotating motor to generate electrical energy. Due to the use of intermediate conversion devices, rotary power generation systems have the following problems: routine maintenance, low efficiency, low power density, high cost. [0003] The linear permanent magnet power generation system directly uses the wave motion to remove the huge linear-rotation transmission and the resulting power loss. Howev...

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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the disadvantages of large volume, low power density and high cost of the direct-drive linear permanent magnet generator, the present invention proposes a cylindrical variable speed linear permanent magnet generator, which combines the magnetic gear and the linear permanent magnet generator The organic integration of magnetic circuit and machinery can increase the speed caused by waves and drive high-speed linear permanent magnet generators to generate electricity, thereby greatly improving power density and efficiency

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