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Tejashree
Associate III
Dec 9, 2021 12:29 PM UTC
Question

How can avoid overlapping of pwm from different channels?

I am writing a simple 6 step bldc motor control using Hall sensor(Complementary PWM).

When I try to switch the pwm(example when HALL input changes from 110 to 101) channel 1 and channel 2 gets over lap.I have inserted Deadtime.

0693W00000Ho2juQAB.pngOne in red is channel 1 and blue is channel 2.

how can prevent this over lap?

This topic has been closed for replies.

2 replies

KnarfB
Super User
Dec 10, 2021 10:20 AM UTC

deadtime is applied within a channel (between CHx and CHxN outputs), so what exactly do we see in the above diagram? Is the red channel tri-stated at the end? Are red and blue two PWM channels of the same timer?

KnarfB

Cristiana SCARAMEL
ST Employee
Dec 14, 2021 1:52 PM UTC

Hi @Tejashree​,

did you solve your issue?

Otherwise, can you answer the questions above from KnarfB?

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