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Designing Control Loops for Linear and Switching Power Supplies [electronic resource] : a Tutorial Guide.
ISBN:
9781608075584
Title:
Designing Control Loops for Linear and Switching Power Supplies [electronic resource] : a Tutorial Guide.
Author:
Basso, Christophe P.
Personal Author:
Publication Information:
Norwood : Artech House, 2012.
Physical Description:
1 online resource (613 pages)
Contents:
Designing Control Loops for Linear and Switching Power Supplies: A Tutorial Guide; Contents; Foreword; Preface; Acknowledgments; Chapter 1 Basics of Loop Control; 1.1 Open-Loop Systems; 1.1.1 Perturbations; 1.2 The Necessity of Control-Closed-Loop Systems; 1.3 Notions of Time Constants; 1.3.1 Working with Time Constants; 1.3.2 The Proportional Term; 1.3.3 The Derivative Term; 1.3.4 The Integral Term; 1.3.5 Combining the Factors; 1.4 Performance of a Feedback Control System; 1.4.1 Transient or Steady State?; 1.4.2 The Step; 1.4.3 The Sinusoidal Sweep; 1.4.4 The Bode Plot.
1.5 Transfer Functions1.5.1 The Laplace Transform; 1.5.2 Excitation and Response Signals; 1.5.3 A Quick Example; 1.5.4 Combining Transfer Functions with Bode Plots; 1.6 Conclusion; Selected Bibliography; Chapter 2 Transfer Functions; 2.1 Expressing Transfer Functions; 2.1.1 Writing Transfer Functions the Right Way; 2.1.2 The 0-db Crossover Pole; 2.2 Solving for the Roots; 2.2.1 Poles and Zeros Found by Inspection; 2.2.2 Poles, Zeros, and Time Constants; 2.3 Transient Response and Roots; 2.3.1 When the Roots Are Moving; 2.4 S-Plane and Transient Response.
2.4.1 Roots Trajectories in the Complex Plane2.5 Zeros in the Right Half Plane; 2.5.1 A Two-Step Conversion Process; 2.5.2 The Inductor Current Slew-Rate Is the Limit; 2.5.3 An Average Model to Visualize Rhp Zero Effects; 2.5.4 The Right Half Plane Zero in the Boost Converter; 2.6 Conclusion; References; Appendix 2A: Determining a Bridge Input Impedance; Reference; Appendix 2B: Plotting Evans Loci with Mathcad; Appendix 2C: Heaviside Expansion Formulas; Reference; Appendix 2D: Plotting a Right Half Plane Zero with Spice; Chapter 3 Stability Criteria of a Control System.
3.1 Building An Oscillator3.1.1 Theory at Work; 3.2 Stability Criteria; 3.2.1 Gain Margin and Conditional Stability; 3.2.2 Minimum Versus Nonminimum-Phase Functions; 3.2.3 Nyquist Plots; 3.2.4 Extracting the Basic Information from the Nyquist Plot; 3.2.5 Modulus Margin; 3.3 Transient Response, Quality Factor, and Phase Margin; 3.3.1 A Second-Order System, the Rlc Circuit; 3.3.2 Transient Response of a Second-Order System; 3.3.4 Opening the Loop to Measure the Phase Margin; 3.3.5 The Phase Margin of a Switching Converter; 3.3.6 Considering a Delay in the Conversion Process.
3.3.7 The Delay in the Laplace Domain3.3.8 Delay Margin versus Phase Margin; 3.4 Selecting the Crossover Frequency; 3.4.1 A Simplified Buck Converter; 3.4.2 The Output Impedance in Closed-Loop Conditions; 3.4.3 The Closed-Loop Output Impedance at Crossover; 3.4.4 Scaling the Reference to Obtain the Desired Output; 3.4.5 Increasing the Crossover Frequency Further; 3.5 Conclusion; References; Chapter 4 Compensation; 4.1 The Pid Compensator; 4.1.1 The Pid Expressions in the Laplace Domain; 4.1.2 Practical Implementation of a Pid Compensator; 4.1.3 Practical Implementation of a Pi Compensator.
4.1.4 The Pid at Work in a Buck Converter.
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Publication Date:
2012
Publication Information:
Norwood : Artech House, 2012.