Simulation Model for Speed Control of Asynchronous Motors

In this document, MATLAB simulation models for asynchronous motor speed control have been developed. The models comprehensively cover Variable Frequency Drive (VFD) speed regulation, vector control, rotor resistance control, and voltage regulation speed control methods. Each speed control model is accompanied by detailed descriptions and analytical discussions to facilitate better understanding of their operational principles and application scenarios. The implementation incorporates Simulink blocks for power electronics components like IGBT inverters for VFD control, Clark/Park transformations for vector control implementation, and variable resistor blocks for rotor resistance control simulations. Motor characteristics including slip-torque relationships, equivalent circuit parameters, and thermal effects are simulated using specialized MATLAB/Simulink electrical library components. For each control method, the code implements specific algorithms: SPWM/SVPWM modulation techniques for frequency control, field-oriented control algorithms with PID regulators for vector control, and discrete resistor switching logic for stepped resistance control. The models include real-time monitoring of key parameters such as rotor speed, electromagnetic torque, stator currents, and efficiency metrics. Through these simulation models, users can gain comprehensive insights into the principles and technologies of asynchronous motor speed regulation, providing valuable references and assistance for practical industrial applications. The modular design allows for easy parameter modification and control strategy comparisons, making it suitable for both educational and research purposes.