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Emulation of Power Passive Elements

אוניברסיטת בן-גוריון בנגב הפקולטה למדעי ההנדסה המחלקה להנדסת חשמל ומחשבים. Emulation of Power Passive Elements. Submit : Rony Levin Email : levinbr@ee.bgu.ac.il Course: Analog Circuit Design Number: 361-2-5221 Lecturer : Prof. Sam Ben-Yaakov. Outline. Definition of the Terms

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Emulation of Power Passive Elements

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  1. אוניברסיטת בן-גוריון בנגב הפקולטה למדעי ההנדסה המחלקה להנדסת חשמל ומחשבים Emulation of Power Passive Elements Submit : Rony Levin Email : levinbr@ee.bgu.ac.il Course: Analog Circuit Design Number:361-2-5221 Lecturer : Prof. Sam Ben-Yaakov

  2. levinbr@ee.bgu.ac.il Outline • Definition of the Terms • Miller Model • Class D Amplifier • “Soft” PWM Simulation • DC Supply – Overview of Rectifiers • Simulations Results • Applications • Conclusion

  3. levinbr@ee.bgu.ac.il Definition of Emulation When one system performs in exactly the same way as another

  4. levinbr@ee.bgu.ac.il Emulation : Miller Model

  5. levinbr@ee.bgu.ac.il Class D Amplifier

  6. levinbr@ee.bgu.ac.il Convergence Problem • Algorithm doesn’t handle with discontinuous function . Why? • Tolerance less than 2 is inaccessible : Δy=2 is a constant • Sign(0) is undefined

  7. levinbr@ee.bgu.ac.il Convergence Problem Proposed Solution • To find continuous differentiable and invertible function that behaves as sign (logic “if ” function( . • Proposed function :

  8. levinbr@ee.bgu.ac.il Convergence Problem Proposed Solution • Increasing the slope • Offset can be added

  9. levinbr@ee.bgu.ac.il Saw-tooth WaveVpulse Source

  10. levinbr@ee.bgu.ac.il “Soft” PWM Simulation • SW – Saw-tooth Wave • Ref – Reference Voltage

  11. levinbr@ee.bgu.ac.il Experimental CircuitDC Supply

  12. levinbr@ee.bgu.ac.il Equivalent Capacitor

  13. levinbr@ee.bgu.ac.il Simulation Results : Av=1.5 , f=1k Ideal DC Supply

  14. levinbr@ee.bgu.ac.il DC Voltage Supply Rectifier with Transformer Isolation

  15. levinbr@ee.bgu.ac.il DC Voltage Supply Voltage-Doubler Rectifier

  16. levinbr@ee.bgu.ac.il Voltage-Doubler Rectifier Negative Half Cycle Positive Half Cycle Current flows if Current flows if

  17. levinbr@ee.bgu.ac.il Experimental Circuit Self Supply

  18. levinbr@ee.bgu.ac.il Self SupplyPSpice Model

  19. levinbr@ee.bgu.ac.il Simulation Results : Av=1.5 , f=1k

  20. levinbr@ee.bgu.ac.il Simulation Results : Av=1.5 , f=1k Rectifier Current Spikes

  21. levinbr@ee.bgu.ac.il Simulation Results : Av=1.5 , f=500 Rectifier Current Spikes

  22. levinbr@ee.bgu.ac.il Simulation Results : Av=1.5 , f=10k Rectifier Current Spikes

  23. levinbr@ee.bgu.ac.il DC Voltage Supply Rectifier with Transformer Isolation

  24. levinbr@ee.bgu.ac.il Simulation Results : Av=1.5 , f=1k Voltage-Doubler Rectifier Rectifier with Transformer Isolation PSim Simulation

  25. levinbr@ee.bgu.ac.il Input Voltage Step Response 230 V rms to 460 V rms

  26. levinbr@ee.bgu.ac.il Power Dissipation • Reactive Power • Measured Energy Loss

  27. levinbr@ee.bgu.ac.il Applications • Compensator • Gyrator • Real Time High Power Variable Capacitor in Parametric Resonance Circuit

  28. levinbr@ee.bgu.ac.il Summary • It can be seen that current has two current spikes in a period • The reason of the current spikes is topology of the voltage – doubler rectifier • The problem can be solved either improving the current topology or using another, more appropriated topology.

  29. levinbr@ee.bgu.ac.il Reference • D.C. Hamill, M.T. Bina,The Bootstrap Variable Inductance and its Applications in AC Power Systems, Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual, Volume 2,  14-18 March 1999 Page(s) : 896 - 902 vol.2

  30. levinbr@ee.bgu.ac.il Thank You for Your Attention

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