https://github.com/mathworks/pmsm-drive-optimization

Motor Efficiency Improvements With Optimized Control Parameters
https://github.com/mathworks/pmsm-drive-optimization

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Motor Efficiency Improvements With Optimized Control Parameters

• Host: GitHub
• URL: https://github.com/mathworks/pmsm-drive-optimization
• Owner: mathworks
• License: other
• Created: 2022-01-10T11:31:20.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2023-12-22T17:51:13.000Z (over 1 year ago)
• Last Synced: 2025-01-03T11:09:53.143Z (6 months ago)
• Language: HTML
• Size: 2.3 MB
• Stars: 17
• Watchers: 5
• Forks: 10
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md
  • Security: SECURITY.md

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README

        
# **Motor Efficiency Improvements With Optimized Control Parameters**

[![View Motor Efficiency Improvements With Tuned Control Parameters on File Exchange](https://www.mathworks.com/matlabcentral/images/matlab-file-exchange.svg)](https://www.mathworks.com/matlabcentral/fileexchange/104840-motor-efficiency-improvements-with-tuned-control-parameters) [![Open in MATLAB Online](https://www.mathworks.com/images/responsive/global/open-in-matlab-online.svg)](https://matlab.mathworks.com/open/github/v1?repo=mathworks/pmsm-drive-optimization)

## Overview

PMSM drive using imported FEM data and optimized Field-Oriented Control (FOC), with supporting design scripts that:

1.	Determine open-loop frequency response and check stability margins. This requires Simulink® Control Design™, using the Frequency Response Estimator block.

2.	Determine the optimal d-axis and q-axis currents that minimize overall motor losses when delivering a commanded torque and speed.

The Electric Drive is implemented using:

1.	A detailed Simscape™ Electrical™ nonlinear motor model in the form of tabulated flux linkages and Steinmetz coefficients. For more information, see [this example](https://www.mathworks.com/help/sps/ug/import-ipmsm-flux-linkage-data-from-motor-cad.html). 

2.	A Field-Oriented Controller (FOC) that has been optimized to minimize motor losses.

### **Drive System**

The drive is parameterized for a 70 kW (maximum power), 150 Nm (maximum torque) motor, suitable for an electric vehicle powertrain. The supply is a 500 V DC source.

![](overview/html/pmsm_foc_drive_optimization_01.png)

### **Field-Oriented Controller Architecture**

The PMSM Field-Oriented Controller subsystem has an outer loop of speed control, and an inner loop of current control. The outer loop determines the current references for the inner loop.

![](overview/html/pmsm_foc_drive_optimization_03.png)

### **Motor Loss Map**

The motor losses depend on d-axis and q-axis currents, and rotor speed. Motor losses are a combination of copper losses and iron losses.

![](overview/html/pmsm_foc_drive_optimization_08.png)

### **Optimal Field Currents**

The *ControllerOptimization.mlx* Live Script computes the optimal d-axis and q-axis current references that minimize motor losses, in function of rotor speed and reference torque.

![](overview/html/pmsm_foc_drive_optimization_10.png)

### **Optimization Validation**

![](overview/html/pmsm_foc_drive_optimization_11.png)

### **Power Losses for Step Load**

The test scenario is a reference speed of 3000 rpm and a torque load stepped from 0 Nm to 50 Nm at t=0.1s.

![](overview/html/pmsm_foc_drive_optimization_15.png)

You can notice the lower motor losses when using optimized control parameters.

## Setup 

Open the project file *PmsmDriveOptimization.prj* to get started.

- Run *workflows/ControllerOptimization.mlx* to compute the optimal control parameters.

- Run *workflows/FreqResponseAnalysis.mlx* to check the control system stability margins. This is computationally intensive.

### MathWorks Products (https://www.mathworks.com)

Requires MATLAB® release R2021b or newer.

- [Simscape](https://www.mathworks.com/products/simscape.html)

- [Simscape Electrical](https://www.mathworks.com/products/simscape-electrical.html)

- [Simulink](https://www.mathworks.com/products/simulink.html)

- [Simulink Control Design](https://www.mathworks.com/products/simcontrol.html)

- [Control System Toolbox](https://www.mathworks.com/products/control.html)

- [Optimization Toolbox](https://www.mathworks.com/products/optimization.html)

### Getting Started 

To learn more about modeling and simulation with Simscape™, please visit:

* [Simscape Getting Started Resources](https://www.mathworks.com/solutions/physical-modeling/resources.html)

## License

The license is available in the License file within this repository.

## Community Support

[MATLAB Central](https://www.mathworks.com/matlabcentral)

Copyright 2022 The MathWorks, Inc.