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WIRELESS POWER TRANSMISSION FOR SOLAR POWER SATELLITE

WIRELESS POWER TRANSMISSION FOR SOLAR POWER SATELLITE. OUT LINE. 1.Executive Summary. 2.SPS System. 3.Recent Technologies and research Antenna and Transmitters- Beam Control, Target Detection, Propagation Receivers and Rectifiers 4.Efficiency.

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WIRELESS POWER TRANSMISSION FOR SOLAR POWER SATELLITE

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  1. WIRELESS POWER TRANSMISSION FOR SOLAR POWER SATELLITE

  2. OUT LINE 1.Executive Summary. 2.SPS System. 3.Recent Technologies and research Antenna and Transmitters- Beam Control, Target Detection, Propagation Receivers and Rectifiers 4.Efficiency. 5.Radio Science Influences and Effect of SPS.

  3. Executive Summary Difference Between - Communication System. - WPT System. Typical WPT is point – point power transmission.

  4. Famous taper method. 1.Gaussion Taper. 2.Taylor Distribution. 3.Chebychev Distribution. suppression of side lobe To increase the power transmission efficiency.

  5. Wireless Power Transmission Optionsfor Space Solar Power • Far Term Space Systems to beam power to Earth • Radio-Wave WPT System • Light-Wave Systems • In a Light wave system highly concentrated solar radiation would be injected into the laser medium (direct solar pumping) and transmitted to earth and converted to electricity by photovoltaic cell’s. • Such system is different from the “classical” SPS using MPT.

  6. Area of Significant Concern Intermediate Area Area of Significant Benefit WPT Wavelength Trade for SSP

  7. SOLAR POWER SATELLITE SYSTEM

  8. SPS CONCEPT It consists of mainly three segment. 1. Solar energy collector 2. DC to Microwave converter 3. Large Antenna Array.

  9. MSC-1A: Lunar and Mars Power (LAMP) ApplicationLaser WPT to Photo-Voltaics on the moon or Mars

  10. Antenna & Transmitter • Beam Control, target detection, propogation • Receiver & rectifier RECENT TECHNOLOGIES AND RESEARCHES

  11. 1. ANTENNAS AND TRANSMITTER

  12. Antennas for Microwave Power Transmission All antennas can be applied for both the MPT system and communication system We have to use a phased array antenna for the MPT from/to moving Transmitter/receiver.

  13. Recent Technologies for Transmitters Generation of Microwave Need higher efficient generator/amplifier. Highly efficient beam collection on rectenna array. Higher stabilized and accurate phase and Amplitude of microwave when we use phased array system for the MPT.

  14. Microwave Generator/Amplifier option for MPT 1.Microwave Tube (Cooker-type Magnetron) 2.Semiconductor Amplifier.

  15. Magnetron Generate and amplify high power microwave (over kW) with a high voltage (over kV) imposed. Higher Efficiency. Low cost. Unstable freq/Uncontrollable phase. Very Economical.

  16. Semiconductor Amplifier It generate low power micro wave with a low voltage It is easy to control a phase and amplitude Especially F class amplifier is expected as high efficient amplifier for the MPT system.

  17. Distinguished from the ordinary use of the microwave technology Pureness in spectrum Efficient power generation and high efficient detector in a small and light fashion Precise beam control

  18. Compare the weight by power-weight ratio.

  19. Compact Microwave Energy Transmitter With PCM

  20. 2.BEAM CONTROL, TARGET DETECTION, PROPAGATION

  21. Recent Technologies of Retro directive Beam Control 1.Corner Reflector 2.Van Atta Array 3.Phase conjugate Ckt.

  22. CONER REFLECTER

  23. VAN ATTA ARRAY

  24. PHASE CONJUGATE CIRCUIT

  25. There are another method for the target detection is “Software Retro directive”. Computer is usually used for the software retro directive.

  26. 3. RECEIVERS AND RECTIFIERS Rectenna Rectenna array Cyclotron Wave Converter

  27. Schematic Picture of Cyclotron Wave Converter

  28. CWCs Developed in Russia

  29. EFFICIENCY 1.RF-DC Conversion Efficiency. 2.Beam Collection Efficiency. 3.DC-RF Conversion Efficiency.

  30. 1. RF-DC Conversion Efficiency. Efficiency of Rectenna – 80% Decline of the Efficiency is caused by -Array connection loss -Change of connected load -Trouble of the rectenna -Any losses on the system(DC/AC conversion, cable)

  31. (a) Efficiency of 2.4 GHz Rectenna (a) Efficiency of 5.8 GHz Rectenna

  32. 2. Beam collection Efficiency Beam collection efficiency depends . - transmitter and receiver aperture areas. - wavelength, and the separation distance between the two antennas Efficiency – 89% Decline Efficiency caused by -Phase -Frequency -Amplitude Error on a Phase Array. The rise of the side lobe decreases antenna gain and beam collection efficiency.

  33. 3. DC-RF conversion Efficiency. We do not have to steer a micro-wave beam electrically. If we need to steer (Guide or control). We use phase shifter without grating lobes.

  34. Power loss of the phase shifter is 4-6dB. - To solve this problem we use low power amplifier after high loss phase shifter without grating lobes.

  35. Conclusion • Microwave power Transmission is most suitable for a power transmission from moving transmitters to moving target than other transmissions modes. • Accurate Target Detection and High efficient Beam forming By Retro directive system for Solar Power Satellite. • Compatible with other radio services and Application. • Power transmission efficiency of WPT is higher than that other mode in reference to. • Higher efficient generator amplifier • Highly efficient beam collection rectenna array

  36. Caution Note • Microwave Power Transmission is Effected on Human Health.

  37. THANK YOU

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