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TMS320F28335: pwm 波形随时间改变.

Part Number: TMS320F28335


我用simulink搭了一个用正弦波和epwm模块生成pwm的模型

刚开始运行的时候pwm波形是连续的(以下为示波器波形):

在运行一段时间后会出现某个波形周期特别的长: