关键词: 永磁同步电机, 无电流传感器, 磁场定向控制, 电动涵道风扇

Abstract: The permanent magnet synchronous motor is used as the driving motor for electric bypass thruster, which requires high speed response of the motor. When vector control is adopted, it is necessary to sample the phase current of the motor, the sampling process depends on the current sensor and many factors will cause the sampling current fluctuation. The traditional FOC was improved, the current loop was abandoned, the speed loop direct control of q-axis voltage and the table method for compensating d - axis voltage were proposed. This method abandoned the traditional Park and Clarke coordinate transformation to decoupling the current, thus reducing the algorithm operation steps, and did not require the participation of the current sensor, simplifying the hardware design and reducing the cost. Simulation and application practice verified the effectiveness of the algorithm.

Key words: permanent magnet synchronous motor( PMSM), current sensorless, field-oriented control( FOC), electric ducted fan