Abstract
This paper proposes a full-order sliding-mode stator observer. The observer takes the stator current and “active flux” as the state variables in the stationary reference frame, and can realize “active flux” estimation in the direct torque controlled interior permanent magnet synchronous motor driving system. Therefore, the stator and electromagnetic torque can be calculated with estimated active flux according to the relationship between active flux, stator and electromagnetic torque. As a result, the IPMSM high-performance speed closed-loop control is achieved. Simulation results are presented to validate the effectiveness of the proposed method.
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