Control of Three-Phase PMSM Drive With Minimum Sensor Usage

This article investigates the control of three-phase permanent magnet synchronous motor (PMSM) drives with minimum sensor usage. To minimize the number of required current sensors, the dual space vector modulations (SVMs) are proposed for phase current reconstruction, synchronously executing vector synthesis twice within a control period. Furthermore, combining the extended Kalman filter and the mathematical relationship between the dc-link voltage and rotor velocity, an integrated observer of position and voltage is developed. In this way, only one single current sensor is required for the control of PMSM. The proposed solution can significantly reduce both the cost and the volume of PMSM drives. Finally, experimental results are provided to validate the effectiveness of the proposed strategy.