Power Converter Design Using the Saber Simulator

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Power Converter Design Using the Saber Simulator

A Step-By-Step Guide to the Design of a Two-Switch， Voltage-Mode， Forward Converter Using the Saber Simulator

1.0 Scope of Document 3

2.0 Specifications 3

2.1 Input Specifications 3

2.2 Output Specifications 3

2.3 Other Specifications 3

3.0 Step-By-Step Design Process 4

3.1 Open Loop Design 4

3.1.1 Define the Duty Cycle and Turns Ratio of the Transformer 4

3.1.2 Design the Rectifier and Filter Capacitor （Optional Section） 5 Validate the Rectifier and Filter Capacitor using Saber 9

3.1.3 Output Filter Design 10 Inductor Design 10 Capacitor Design 11

3.1.4 Validate the Open Loop Design using Saber 11

3.2 Compensator Design using an Averaged Model 15

3.2.1 Validate the Averaged Model using Saber 16

3.2.2 Open-Loop AC Analysis 18

3.2.3 Designing the Compensation Circuit 18

3.2.4 Validate the Compensator Design using Saber 21

3.2.5 Validate the Closed Loop Parameters using Saber 21

3.3 Modulator Design and Final Closed Loop Simulation 23

3.3.1 Validate the Modulator Design using Saber 25

3.3.2 Validate the Closed Loop Design using Saber 27

3.4 Final Component Level Design 29