BLDC Motor Control Using PI Controller Only

This document discusses the implementation of a Brushless DC (BLDC) motor using only a PI controller. BLDC motors, which stand for Brushless Direct Current motors, are widely used in automation and mechanical engineering applications due to their high efficiency and reliability. The PI (Proportional-Integral) controller is a classic control algorithm that regulates system output by combining proportional gain for immediate error correction and integral gain to eliminate steady-state errors. In BLDC motor control implementations, the PI controller typically manages speed or current regulation through pulse width modulation (PWM) signals. The proportional term (Kp) provides immediate response to error changes, while the integral term (Ki) accumulates past errors to achieve precise target tracking. A typical code implementation would involve reading Hall sensor feedback, calculating error between desired and actual speed, then computing the PI output using: output = Kp × error + Ki × ∫error dt. Using only a PI controller for BLDC motor control enables improved dynamic response and stability, leading to more efficient and reliable motor operation. This approach enhances overall application performance by providing smooth speed regulation, reduced overshoot, and better disturbance rejection capabilities compared to simpler control methods.