关键的控制信号SPWM的脉冲宽度采用中值规则采样法来求取。
The pulse width of the key control signal SPWM is acquired by the sampling method based on median rule.
在分析了SPWM调制原理的基础上，提出了改进型的规则采样法产生SPWM波。
After analyzing basic principle of SPWM, this thesis proposes a modified version of rule sampling method.
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.
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