The new three-phase drive control strategy SITRAC combines dynamic torque control, robustness and optimized modulation withselfadjustment and allows speed sensorless operation.

新的交流传动调节方法SITRAC融合动力学、耐用性和具有自调节的最佳调制为一体，其运行可不用速度传感器。

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When the rotational frequency exceeds the forced commutation frequency specified with the status of the FST pins, the operation mode is switched to the sensorless mode.

当转动频率超过FST引脚状态指定的强制换向频率后，运行模式切换到无传感器运行模式。

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