Simulink Simulation Model Diagram of the Established Brushless DC Motor System

In this document, we present a Simulink simulation model diagram for a brushless DC motor system. This system comprises several critical functional modules, including the inverter module, power supply module, commutation logic module, PWM signal generation module, motor body module, speed measurement module, and magnetic pole position measurement module. We will detail the functionality and role of each module to help readers better understand the complexity and importance of this system.

First, the inverter module is a key component in this system. Its function is to convert DC power into AC power to drive the motor, typically implemented using switching algorithms like space vector modulation or sinusoidal PWM. Next, the power supply module provides the necessary electrical power for the system operation. The commutation logic module controls the motor's rotation direction using Hall sensor signals or encoder feedback, ensuring proper motor operation. The PWM signal generation module produces PWM signals to regulate motor speed, often employing timer interrupts or hardware PWM peripherals in embedded code implementations. The motor body module is the core component of the motor, converting electrical energy into mechanical energy to drive mechanical equipment, modeled using electromagnetic equations and mechanical dynamics. The speed measurement module calculates motor speed through encoder pulse counting or back-EMF sensing, enabling precise control system regulation. Finally, the magnetic pole position measurement module detects the motor's magnetic pole position using Hall effect sensors or sensorless estimation algorithms, allowing the commutation logic module to correctly control motor direction.

Through the coordinated operation of these modules, the brushless DC motor system can operate efficiently, bringing convenience and benefits to industrial production and household applications. We hope this document helps readers better understand the system's complexity and importance, along with the functionality and role of each module.