A Vertical Flux-Switching Permanent Magnet Based Oscillating Wave Power Generator with Energy Storage
Abstract
:1. Introduction
2. Structure of the Wave Power Generation System
2.1. Overall Power Generation Parts
2.2. Prototype of the Linear Machine
2.3. Energy Storage Topology
2.4. Main Control Flow Chart of the Whole System
3. Basic Principles of the System
3.1. Mathematical Model of the Linear Machine
3.2. Wave Energy Input
3.3. Characteristics of the Energy Storage System
3.4. Control Algorithm for the Whole System
4. FEM Calculation and Simulation
4.1. FEM Calculation for the Machine
4.2. Controller Design for the Whole System
4.3. Simulation for the Power Generation System
5. Efficiency Analysis
6. Experimental Verification
6.1. Experimental Setup
6.2. Experimental Results
7. Discussion
8. Conclusions
- (1)
- Low-speed oscillating wave power generation is realized by the effective direct-drive approach;
- (2)
- A bilateral vertical machine is effectively designed for low-speed wave power generation;
- (3)
- An energy storage method using a supercapacitor and a battery has been proposed for wave power harvesting with three modes;
- (4)
- The sliding mode control operates effectively to improve the performance of the generation system;
- (5)
- The efficiency of the power conversion is evaluated and analyzed. Compared with other OWCs, this efficiency is higher in the paper.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Specifications | Quantity (SI) |
---|---|
Rated power | 100 W |
Rated current | 5 A |
Pitch (τ) | 2 mm |
Length of the stator (l) | 350 mm |
Number of turns of each coil | 160 |
Width of the mover plate (w) | 16 mm |
Height of the mover plate (h) | 16 mm |
Width of the coil area (c) | 10 mm |
Stack length (s) | 40 mm |
Speed range | 0~1 m/s |
Size of the PMs | 40 mm × 16 mm × 3 mm |
Rated power | 100 W |
Rated current | 5 A |
Modes | Power Status | Battery Status | Supercapacitor |
---|---|---|---|
I | Po > Pload | Charging | Charging |
II | Po < Pload < Po + Pc | Close | Discharging |
III | Pload > Po + Pc | Discharging | Discharging |
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Zou, Y.; Cheng, K.W.E. A Vertical Flux-Switching Permanent Magnet Based Oscillating Wave Power Generator with Energy Storage. Energies 2017, 10, 887. https://doi.org/10.3390/en10070887
Zou Y, Cheng KWE. A Vertical Flux-Switching Permanent Magnet Based Oscillating Wave Power Generator with Energy Storage. Energies. 2017; 10(7):887. https://doi.org/10.3390/en10070887
Chicago/Turabian StyleZou, Yu, and Ka Wai Eric Cheng. 2017. "A Vertical Flux-Switching Permanent Magnet Based Oscillating Wave Power Generator with Energy Storage" Energies 10, no. 7: 887. https://doi.org/10.3390/en10070887