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1KW Wave Energy Converter Design Topology
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WAVE ENERGY CONVERTER (WEC)
Designing 1KW Generator
Types of WEC
Type of WEC
Over-topping
Device
Oscillating
Water Column
Oscillating Water Column
Wave Activated Bodies
Wave Activated
Bodies
It is an advanced technology and is really good to convert the wave up and down motion to electrical energy
Design Topology
Design
Topology
Slotted / Slotless
- Reduce cogging Torque
- Allow smoother performance
Slotless / Slotted
Air-core Stator / Iron-cored Stator
Higher magnetic field
Air-core Stator /
Iron-cored Stator
-Has higher magnetic field
-Iron can help to dissipate the heat
Moving Coil / Moving magnet
-Rotor is moving up and down. Therefore can attach magnet to rotor.
-For moving coil need space for the coil to move
Moving Coil /
Moving Magnet
Radial / Axial / Halbach
Axial /
Radial /
Halbach
-Radial is simple to design and cheaper
-Halbach is complicated and more expensive
-if cost is a concern, we choose radial.
-if efficiency and size is a concern, choose Halbach
Rotary / Linear
Rotary / Linear
- The wave move up and down
- Therefore is suitable to be used for linear generator which moves up and down.
- Linear generator also more advanced than rotary generator
Planar / Tubular
Planar / Tubular
-Planar require longer coil and
more iron required
-Greater coil losses, and iron losses
-tubular have denser magnetic flux and flux is distributed evenly.
Induction Generator /
Synchronous Generator /
Permanent magnet Generator
- Doesn't require external DC source
- Can use strong magnet to create a strong magnetic field
Induction Generator /
Permanent magnet Generator / Synchronous Generator
Generator
Design
Dimension
Design A
Design B
Design C
Flux Lines
Design Output
Generator output
Specification
Flux Line vs axial position
Induced Voltage and Flux Linkage
Motion Up
Motion Down
Air gap Flux Line
Design Process Flow
Conclusion
Conclusion
-During motion up, maximum voltage produce is 1.0221kV
-During motion down, the maximum voltage produce is -1.02456kV
-Stranded loss will increase if Ls/Lr is decrease
-Solid Loss will increase if Ls/Lr is increase
-Total copper loss for the proposed design is 34.8737W.
-We can reduce this losses by designing the Ls/Lr=0.6 which has total copper loss of 34.1692W.
-The proposed design has an efficiency of 96.63%.
-This can also be optimized by using Ls/Lr=0.6 where the efficiency is 96.93%
-Radial and halbach have its pros and cons.Both design is able to achieved 1kW.
-Customer that focus on cost will eventually choose radial
-However, customer that focus on size, efficiency and advanced technology will choose halbach