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Design of PID Speed Controller for BLDC MOTOR in MATLAB

Design of PID Speed Controller for BLDC MOTOR in MATLAB

Welcome to another insightful solution! In today's discussion, we will explore the process of designing a Proportional-Integral-Derivative (PID) speed controller for a DC motor. The objective is to regulate the speed of the motor efficiently, ensuring it responds accurately to varying speed commands. The simulation model used for this demonstration involves a Brushless DC (BLDC) motor, a controlled voltage source, and a voltage source inverter.

Simulation Model Components:

The simulation model comprises key elements such as a controlled voltage source, voltage source inverter, and the BLDC motor. The motor's speed is measured using a sensor, and the back electromotive force (EMF) is calculated using a decoding concept decoder. The focus is on the PID speed controller to fine-tune the motor's speed based on a transfer function derived from collected input and output data.

Transfer Function Identification:

To design an effective PID controller, understanding the transfer function of the DC motor system is crucial. The video demonstrates the collection of input-output data, which is then utilized in the System Identification Toolbox. The obtained transfer function model is crucial for setting up the PID controller.

PID Controller Design:

The PID controller is introduced to control the motor's speed effectively. The Proportional (P), Integral (I), and Derivative (D) components play key roles in providing precise control. The blog post provides insights into determining the PID controller parameters, such as KP (proportional coefficient) and KX (constant value).

Testing the System:

The designed PID controller is then implemented in the simulation model to observe its performance. The blog post walks through the simulation results, showcasing the motor's response to changes in speed commands and load torque. Details on overshoot, settling time, and response to disturbances are discussed, highlighting the effectiveness of the PID controller in maintaining speed control.


The blog post concludes by summarizing the process of designing a PID speed controller for a DC motor. It emphasizes the importance of understanding the transfer function and tuning the PID parameters for optimal performance. The insights provided in the post offer a comprehensive guide for engineers and enthusiasts interested in motor control systems.

Stay tuned for more informative content!

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