phase step meaning in Chinese

相位阶跃

The surface roughness of the fabricated micro - optics structure is in the nanometer range ; the feature height of the diffractive phase step is in the sub - micrometer range ; and can be adjusted according to requirements ; and the optical aperture of the microlens can be changed from millimeter to centimeter magnitude
所制微光学结构的表面粗糙度在纳米量级，衍射相位台阶的高度在亚微米量级并可以根据需求灵活调整，通光孔径在毫米至厘米量级的范围内可调。
The design of excitation power source based on principle of three phase step motor and pulse width modulation ( pwm ) technology , intelligent power model ( ipm ) is used for inverter switches , the output ac pulse used as excitation signals . the speed of rotation and magnetic intensity can be changed by regulate the exciting converted frequency and magnitude of exciting current . constant current is achieved by closed loop feed back
励磁电源结合步进电机原理与脉宽调制技术,选用智能功率模块ipm作为逆变开关器件,输出交流脉冲励磁信号,以调节励磁转换频率和励磁电流大小为手段,实现对磁场旋转频率和磁场强度大小的有效调节,并通过闭环反馈实现闭环恒流控制。