Permanent Magnet Synchronous Motor Control Using PI Controller

This article demonstrates how to implement vector control for permanent magnet synchronous motors (PMSM) using PI controllers. Vector control represents an advanced motor control technique that enables high-efficiency operation by independently regulating the motor's magnetic flux and torque components. The PI controller implementation typically involves designing separate control loops for the d-axis (flux-producing) and q-axis (torque-producing) currents, often utilizing Park and Clarke transformations to convert three-phase quantities into a rotating reference frame. Permanent magnet synchronous motors are widely adopted in industrial and domestic applications due to their high efficiency and superior performance characteristics. Through this article, we will illustrate the practical implementation of PI-based vector control for PMSM, complete with algorithm explanations and key function descriptions, thereby enhancing both motor performance and operational efficiency. Common implementation steps include current sampling, coordinate transformation, PI regulator calculation, and space vector PWM generation.