DC magnetic bias

例句：

1. 1. In the design of a DC motor, the magnetic bias is crucial for its performance.
   在直流电机的设计中，磁偏置对性能至关重要。
2. 2. The DC motor's efficiency is directly related to the accuracy of the magnetic bias adjustment.
   直流电机的效率与磁偏调整的准确性直接相关。
3. 3. The DC motor's magnetic bias was adjusted to optimize its speed and torque ratio.
   直流电机的磁偏被调整以优化其速度和扭矩比。