A Design of Stabilized Sensor-Error-Tolerant V/f Control in iPMSMs for EV Traction

This paper analyzes the characteristics of interior permanent-magnet synchronous machines using the voltage-frequency control by deriving a generic small-signal model and considering the electric dynamics and nonlinear parameters. Furthermore, a novel closed-loop voltage-frequency control algorithm is developed and demonstrated. By applying this algorithm, it is intended to switch the 3-phase interior permanent-magnet synchronous machines from the field oriented control mode to the voltage-frequency control mode stably on purpose of sensor error diagnosis and compensation in real time.