Maintenance-free brushless drive motor with frequency inversion, has high start torque and short acceleration time.
免维护高力矩无刷变频电机直接驱动，启动力矩大、加速时间短。
The digital circuits are introduced in the SPWM inversion, which have brought the elimination of harmonics, high switching frequency, simplified circuits and high reliability.
而对于SPWM逆变，采用数字电路实现SPWM触发脉冲的生成，在消除谐波、提高开关频率、简化电路结构，提高集成度和可靠性等方面，取得了很好的效果。
After 3d high resolution seismic data of Yacheng 13-1 structure were inversed using restriction sparse pulse inversion, data volume of full-frequency band absolute wave impedance was gained.
利用约束稀疏脉冲反演方法对崖城13—1构造的高分辨率三维地震资料进行了反演，得到了全频带的绝对波阻抗数据体。
But whether it can reach the prospecting aim by study for inversion of attenuation by earth absorption and by decreasing high frequency noise?
但是否可以通过研究反演大地吸收衰减和减少采集的高频噪声达到勘探的目的呢？
Applying high frequency LC series connection resonant circuit, no industrial frequency transformer, high inversion efficiency.
采用高频LC串联谐振电路，具有逆变效率高的特点。
Applying high frequency LC series connection resonant circuit, no industrial frequency transformer, high inversion efficiency.
采用高频LC串联谐振电路，具有逆变效率高的特点。
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