What does this research mean for the field?

A PWM-PID controller provides superior transient response characteristics, including lower overshoot and faster settling time, and improved stability for three-phase induction motor speed control under varying load conditions compared to a standard PI controller. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To design and evaluate a discrete-time PWM-PID controller capable of maintaining a stable preset speed for a three-phase induction motor under both constant and fluctuating load torque.

September 3, 2026Iconic Research and Engineering JournalsOpen Access

Speed Control of Induction Motor Under Changing Load Torque Using PWM-PID Controller

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Authors

MEM. Okafor Ejiofor IUIsidore A. Uju UOUgochukwu P. Okoye

Discussion

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Implication

Simulation study reveals precise speed regulation in three-phase induction motors under varying load torque, indicating superior transient stability over proportional-integral control.

Key Points

To design and evaluate a discrete-time PWM-PID controller capable of maintaining a stable preset speed for a three-phase induction motor under both constant and fluctuating load torque.
Formulated a mathematical model of a three-phase induction motor and integrated a discrete-time PWM-PID speed control scheme.
Conducted dynamic simulations in MATLAB/Simulink across no-load, 50 N-m constant load, and 20 N-m to 50 N-m variable load conditions, comparing responses against a standard PI controller.
At no load, the motor achieved a settling time of 0.2295 s and a minimal overshoot of 0.9036%.
Under a constant 50 N-m load and changing 20 N-m to 50 N-m loads, settling times were 5.1107 s and 6.5983 s, peak times were 0.3 s and 0.3445 s, and overshoots were 0.9394% and 1.003%, respectively.
The PWM-PID architecture demonstrated superior stability and transient response characteristics across all metrics compared to conventional PI control.

Cite This Study

Ejiofor et al. (2026) studied this question.

synapsesocial.com/papers/6a993503636c6408cfa7cd52 https://doi.org/10.64388/irev10i2-1722561

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September 3, 2026Iconic Research and Engineering JournalsOpen Access

Speed Control of Induction Motor Under Changing Load Torque Using PWM-PID Controller

View Full Paper

Ask AI

Bookmark

Authors

MEM. Okafor Ejiofor IUIsidore A. Uju UOUgochukwu P. Okoye

Discussion

Member takes

Implication

Simulation study reveals precise speed regulation in three-phase induction motors under varying load torque, indicating superior transient stability over proportional-integral control.

Key Points

To design and evaluate a discrete-time PWM-PID controller capable of maintaining a stable preset speed for a three-phase induction motor under both constant and fluctuating load torque.
Formulated a mathematical model of a three-phase induction motor and integrated a discrete-time PWM-PID speed control scheme.
Conducted dynamic simulations in MATLAB/Simulink across no-load, 50 N-m constant load, and 20 N-m to 50 N-m variable load conditions, comparing responses against a standard PI controller.
At no load, the motor achieved a settling time of 0.2295 s and a minimal overshoot of 0.9036%.
Under a constant 50 N-m load and changing 20 N-m to 50 N-m loads, settling times were 5.1107 s and 6.5983 s, peak times were 0.3 s and 0.3445 s, and overshoots were 0.9394% and 1.003%, respectively.
The PWM-PID architecture demonstrated superior stability and transient response characteristics across all metrics compared to conventional PI control.

Cite This Study

Ejiofor et al. (2026) studied this question.

synapsesocial.com/papers/6a993503636c6408cfa7cd52 https://doi.org/10.64388/irev10i2-1722561

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