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Direct drive type permanent magnet linear generator for wave power generation

A technology of wave power generation and permanent magnet straight line, which is applied in ocean energy power generation, engine components, machines/engines, etc., can solve problems such as difficult control, low power density, and large volume, and achieve simple and compact structure, improved power density, and volume small effect

Inactive Publication Date: 2021-03-19
JIANGSU UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In view of the shortcomings of existing linear generators such as large volume, low power density, and difficult control, the present invention provides a direct-drive permanent magnet linear generator for wave power generation. The invention uses the outer permanent magnet part as the mover and the buoy to directly Connected, the system structure is simple, the volume and weight are reduced; and the permanent magnet part adopts the array method with magnetic concentration effect, which effectively improves the power density of the linear generator

Method used

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  • Direct drive type permanent magnet linear generator for wave power generation
  • Direct drive type permanent magnet linear generator for wave power generation

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Embodiment

[0020] Examples, see Figure 1-2 , a permanent magnet linear generator for direct drive wave power generation, including a linear generator stator structure, a mover structure and a buoy 4, wherein the linear generator stator structure includes a stator core 8, a stator shaft 12 and a coil winding 7, and the stator The outer circumference of the iron core 8 is provided with a plurality of annular grooves, and a group of coil windings 7 are placed in each groove, and the center of the stator iron core 8 has a through shaft hole, and the stator shaft 12 is a hollow shaft, and The shaft hole of the stator core 8 is fixed; an air gap 10 is formed between the stator structure and the mover structure, and the mover structure of the linear generator includes an upper end cover 3, a lower end cover 11, a casing 5 and a permanent magnet part 6, and the inner wall of the casing 5 is installed There is a permanent magnet part 6, the upper and lower ends of the casing are installed on the...

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Abstract

The invention discloses a direct drive type permanent magnet linear generator for wave power generation. The generator comprises a stator structure, a rotor structure and a buoy, wherein the rotor structure is fixed in the buoy and reciprocates up and down along with the buoy, a cavity is arranged in the rotor structure, the stator structure is arranged in the cavity, and a Halbach array is adopted for the arrangement of a permanent magnet part. The shell is fixed to the inner wall of the buoy and drives the linear generator rotor structure to reciprocate up and down along with fluctuation ofwaves, the coil winding in the stator structure in the static state cuts magnetic field lines, and therefore induced electromotive force is generated. The permanent magnet linear generator has advantages of simple and compact structure, small size, light weight, high power density, high power generation efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of linear generators, in particular to a direct-drive permanent magnet linear generator for wave power generation. Background technique [0002] As a clean, pollution-free renewable energy, ocean wave energy is inexhaustible and inexhaustible. The development and utilization of wave energy can effectively alleviate the energy crisis and environmental pollution faced by today's society. At present, common wave energy power generation systems mostly rely on intermediate transmission devices to convert the undulating linear motion of waves into rotational motion, and then use rotary motors to achieve energy conversion. The existence of intermediate conversion devices leads to low energy conversion efficiency of this type of power generation system, and faces problems such as complex structure, high manufacturing and maintenance costs, which restrict the development of wave power generation technology. [0003]...

Claims

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Application Information

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IPC IPC(8): H02K35/02H02K1/34F03B13/20
CPCF03B13/20H02K1/34H02K35/02Y02E10/30
Inventor 范新宇殷杰王长坤
Owner JIANGSU UNIV OF SCI & TECH
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