16-07-2014, 04:15 PM
Wireless Power Transmission
[attachment=65904]
Energy Coupling
The transfer of energy
Magnetic coupling
Inductive coupling
Simplest Wireless Energy coupling is a transformer
Types and Technologies of WPT
Near-field techniques
Inductive Coupling
Resonant Inductive Coupling
Air Ionization
Far-field techniques
Microwave Power Transmission (MPT)
LASER power transmission
Inductive coupling
Primary and secondary coils are not connected with wires.
Energy transfer is due to Mutual Induction
Inductive coupling (contd…)
Transformer is also an example
Energy transfer devices are usually air-cored
Wireless Charging Pad(WCP),electric brushes are some examples
On a WCP, the devices are to be kept, battery will be automatically charged.
Resonance Inductive Coupling(RIC)
Combination of inductive coupling and resonance
Resonance makes two objects interact very strongly
Inductance induces current
WiTricity
Based on RIC
Led by MIT’s Marin Soljačić
Energy transfer wirelessly for a distance just more than 2m.
Coils were in helical shape
No capacitor was used
Efficiency achieved was around 40%
Advantages of near-field techniques
No wires
No e-waste
Need for battery is eliminated
Efficient energy transfer using RIC
Harmless, if field strengths under safety levels
Maintenance cost is less
Microwave Power Transfer(MPT)
Transfers high power from one place to another. Two places being in line of sight usually
Steps:
Electrical energy to microwave energy
Capturing microwaves using rectenna
Microwave energy to electrical energy
LASER transmission
LASER is highly directional, coherent
Not dispersed for very long
But, gets attenuated when it propagates through atmosphere
Simple receiver
Photovoltaic cell
Cost-efficient
Solar Power Satellites (SPS)
To provide energy to earth’s increasing energy need
To efficiently make use of renewable energy i.e., solar energy
SPS are placed in geostationary orbits
Conclusion
Transmission without wires- a reality
Efficient
Low maintenance cost. But, high initial cost
Better than conventional wired transfer
Energy crisis can be decreased
Low loss
In near future, world will be completely wireless
[attachment=65904]
Energy Coupling
The transfer of energy
Magnetic coupling
Inductive coupling
Simplest Wireless Energy coupling is a transformer
Types and Technologies of WPT
Near-field techniques
Inductive Coupling
Resonant Inductive Coupling
Air Ionization
Far-field techniques
Microwave Power Transmission (MPT)
LASER power transmission
Inductive coupling
Primary and secondary coils are not connected with wires.
Energy transfer is due to Mutual Induction
Inductive coupling (contd…)
Transformer is also an example
Energy transfer devices are usually air-cored
Wireless Charging Pad(WCP),electric brushes are some examples
On a WCP, the devices are to be kept, battery will be automatically charged.
Resonance Inductive Coupling(RIC)
Combination of inductive coupling and resonance
Resonance makes two objects interact very strongly
Inductance induces current
WiTricity
Based on RIC
Led by MIT’s Marin Soljačić
Energy transfer wirelessly for a distance just more than 2m.
Coils were in helical shape
No capacitor was used
Efficiency achieved was around 40%
Advantages of near-field techniques
No wires
No e-waste
Need for battery is eliminated
Efficient energy transfer using RIC
Harmless, if field strengths under safety levels
Maintenance cost is less
Microwave Power Transfer(MPT)
Transfers high power from one place to another. Two places being in line of sight usually
Steps:
Electrical energy to microwave energy
Capturing microwaves using rectenna
Microwave energy to electrical energy
LASER transmission
LASER is highly directional, coherent
Not dispersed for very long
But, gets attenuated when it propagates through atmosphere
Simple receiver
Photovoltaic cell
Cost-efficient
Solar Power Satellites (SPS)
To provide energy to earth’s increasing energy need
To efficiently make use of renewable energy i.e., solar energy
SPS are placed in geostationary orbits
Conclusion
Transmission without wires- a reality
Efficient
Low maintenance cost. But, high initial cost
Better than conventional wired transfer
Energy crisis can be decreased
Low loss
In near future, world will be completely wireless