AN 973: Three-phase Boost Bidirectional AC/DC Converter for Electric Vehicle (EV) Charging

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ID 733436
Date 6/23/2022
Public
Document Table of Contents
Document Table of Contents x
1. Three-phase Boost Bidirectional AC/DC Converter for Electric Vehicle (EV) Charging Design Example Overview 2. Downloading and Installing the Design Example 3. Model Description 4. FPGA Resource Use Comparison 5. Locating Top-level VHDL Wrapper 6. Generating HDL Code with MATLAB and HDL Coder 7. Simulink Simulation Results 8. Document Revision History for AN 973: Three-phase Boost Bidirectional AC/DC Converter for EV Charging
2. Downloading and Installing the Design Example x
2.1. Software Requirements 2.2. Hardware Requirements 2.3. Downloading and Installing the Design
3. Model 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. Controller Block 3.2.2. Power Electronics Block Model 3.2.3. Source Voltage Generator Block
3.2.1. Controller Block x
3.2.1.1. Pulse Width Modulation (PWM) Controller 3.2.1.2. Phase-locked Loop (PLL) 3.2.1.3. Sampling Circuit 3.2.1.4. Clarke and Park Transforms
3.2.2. Power Electronics Block Model x
3.2.2.1. Six-switch Power Converter 3.2.2.2. Inductors 3.2.2.3. Output Capacitor
6. Generating HDL Code with MATLAB and HDL Coder x
6.1. Generating HDL and QPF Using MATLAB Scripts 6.2. Generating HDL and QPF Using MATLAB GUI Tools
1. Three-phase Boost Bidirectional AC/DC Converter for Electric Vehicle (EV) Charging Design Example Overview
2. Downloading and Installing the Design Example
3. Model Description
4. FPGA Resource Use Comparison
5. Locating Top-level VHDL Wrapper
6. Generating HDL Code with MATLAB and HDL Coder
7. Simulink Simulation Results
8. Document Revision History for AN 973: Three-phase Boost Bidirectional AC/DC Converter for EV Charging

3.2.1.2. Phase-locked Loop (PLL)

The Phase-locked Loop (PLL) block is required to assert that the phases of the generated current references are synchronous with the power grid. The rotating angle wt, an output of the PLL, is the same DQ frame rotation angle. The resulting rotation angle is used as feedback to calculate the angle wt for another DQ transform.
Note: The quadrature component of the voltage Vq is controlled to a value of 0. When Vq = 0, the PLL locks, which means that the references are fully synchronized with the grid.

To achieve a faster lock, the PI controller within the PLL uses high values of Kp and Ki . For this implementation, Kp = 10 and Ki = 100000 Ts (Ts = 50 ns).

The following figure shows the final implementation of the PLL using Simulink blocks in the discrete-time domain for FPGA HDL coder generation:

Figure 14. Phase-locked Loop Block for Grid Synchronization
Level Two Title