Home / Community / ST Power management / I use single shunt algorithm to catch phase current, but check the 3 phase output side \nI can see there exist abnormal turn on/turn off signal as the attachment figure

I use single shunt algorithm to catch phase current, but check the 3 phase output side \nI can see there exist abnormal turn on/turn off signal as the attachment figure

SkyWork 2021-01-18

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I don't solve any issue, basic is is not a issue. the reason is that is ST's patent for catch current under one shunt architecture ST will insert Zero vector (V0 or V7), in the special case for example when two of 3 phase duty cycle is to similar. 　?

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I use single shunt algorithm to catch phase current, but check the 3 phase output side \nI can see there exist abnormal turn on/turn off signal as the attachment figure

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