As the natural sampling method generating SPWM pulses closer to sine wave is impractical in real-time control, the regular sampling method with poor precision is usually adopted in practical projects.

自然采样法产生的SPWM脉冲效果最接近正弦波，但工程中不利于实时控制，在实际中常采用的规则采样法精度不够高。

youdao

Its movement looks like a regular sine wave function within pretty defined parameters, and this pattern has held true for the last 1200 days.

FORBES: Microsoft Earnings and Xbox Event Will Likely Meet Expectations...and That's the Problem