实验表明采用对称规则采样法产生的SPWM 波形，具有速度快、变频方便等优点。
The experimental results show that symmetry rule sampling method has advantages of fast speed and converting frequency easily.
本论文所论述的系统采用MSP430F149单片机通过不对称规则采样法来输出高精度的三相spwm波形，从而实现了逆变器的SPWM控制。
The system adopts MSP430F149 MCU and asymmetry regular-sampling strategy to output high precision SPWM wave, consequently transducer's SPWM control is realized.
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