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Emulation of Power Passive Elements in Analog Circuit Design

This course focuses on the emulation of power passive elements within analog circuit design. Key topics include the definition of emulation, analysis of the Miller model, Class D amplifier, soft PWM simulation, and overview of rectifiers in DC supply. We will delve into convergence problems in algorithms, propose solutions for achieving continuous differentiable functions, and explore simulation results from various rectifier circuits, including ideal and voltage-doubler configurations. Applications such as compensators and real-time high-power variable capacitors will also be discussed.

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Emulation of Power Passive Elements in Analog Circuit Design

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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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