AN 995: Three-phase Boost Bidirectional AC-DC and LLC DC-DC Converter for EV Charging Design Example

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ID 784593
Date 9/15/2023
Public
Document Table of Contents
Document Table of Contents x
1. About the Three-phase Boost Bidirectional AC-DC and LLC DC-DC Converter for Electric Vehicle (EV) Charging Design Example 2. Getting started with the Design Example 3. Functional Description 4. Top-level VHDL Wrapper 5. Simulink Simulation Results 6. Document Revision History for AN 995: Three-phase Boost Bidirectional AC-DC and LLC DC-DC Converter for EV Charging Design Example
1. About the Three-phase Boost Bidirectional AC-DC and LLC DC-DC Converter for Electric Vehicle (EV) Charging Design Example x
1.1. FPGA Resource Usage
2. Getting started with the Design Example x
2.1. Software Requirements 2.2. Hardware Requirements 2.3. Downloading the Design 2.4. Installing the Design Example Templates 2.5. Programming the Board with the Design 2.6. Generating HDL Code with MATLAB and HDL Coder
2.5. Programming the Board with the Design x
2.5.1. Running the Design
2.6. Generating HDL Code with MATLAB and HDL Coder x
2.6.1. Generating HDL and QPF Using MATLAB Scripts 2.6.2. Generating HDL and QPF Using MATLAB GUI Tools
3. Functional Description x
3.1. Simscape* Model 3.2. Simulink* Model 3.3. HDL Inputs, Outputs, and Parameters
3.2. Simulink* Model x
3.2.1. AC-DC Converter Controller 3.2.2. Power Electronics 3.2.3. Source Voltage Generator Block 3.2.4. LLC DC-DC Converter
3.2.1. AC-DC Converter Controller x
3.2.1.1. PWM Controller 3.2.1.2. PLL 3.2.1.3. Sample and Hold Block 3.2.1.4. Clarke and Park Transforms
3.2.2. Power Electronics x
3.2.2.1. Six-switch Power Converter 3.2.2.2. Inductors 3.2.2.3. Output Capacitor
1. About the Three-phase Boost Bidirectional AC-DC and LLC DC-DC Converter for Electric Vehicle (EV) Charging Design Example
2. Getting started with the Design Example
3. Functional Description
4. Top-level VHDL Wrapper
5. Simulink Simulation Results
6. Document Revision History for AN 995: Three-phase Boost Bidirectional AC-DC and LLC DC-DC Converter for EV Charging Design Example

3.1. Simscape* Model

The Simscape* model is in the matlab/Simscape directory under the bidir_rectifier_dcdc_2models.slx file. This model implements Simscape Electronics* blocks, and it is the primary approach to implementing the Three-phase Boost Bidirectional AC-DC and LLC DC-DC Converter for EV Charging.

The bidir_rectifier_dcdc_2models.slx file compares the Simscape model with an implementation of a floating-point Simulink* model. This model checks the behavior of the power converter across multiple implementations.

You cannot use the Simscape model to generate HDL code for FPGA. However, the model shows how to implement power and control models, which you can convert to synthesizable blocks for programming an FPGA fabric (refer to Simulink Model).

The Simscape model has all components and subsystems as the Simulink model (refer to Simulink Model). To run this simulation, click Run on the Simulink GUI menu.
Figure 11. Launching Simscape Model Simulation

Simscape Power Electronics Blocks

The following Simscape power electronics block are equivalent to Simulink Model power electronics block in Power Electronics Block Model:

  • Six-switch power converter (AC-DC rectifier)
  • LLC DC-DC power electronics block

You can see the difference between implementing power circuitry using Simscape electronics and Simulink blocks. These blocks implement an array of transistors, capacitors, and inductors. The Simulink blocks emulate these passive and active components.

For the LLC DC-DC power electronics block, the Simscape power electronics offers two alternative models: one uses a true transformer model, the other uses an equivalent model comprising a simplified inductor model. The latter is mathematically simpler to implement using Simulink blocks.

Figure 12. Six-Switch Power Converter Implemented with Simscape blocks. The figure shows the AC-DC power electronics block within the Simscape model in bidir_rectifier_dcdc_2models.xsl
Figure 13. LLC DC-DC Power Electronics Implemented with Simscape blocks. The figure shows the LLC DC-DC power electronics block within the Simscape model in bidir_rectifier_dcdc_2models.xsl
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