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BLDC Commutation : Explanation required

adnan012

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hi,

Please explain the commutation sequence in 3-phase BLDC. As shown in the attached diagram , why there are rising and falling slopes?

Best Regards!
 

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KlausST

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Hi,

The picture is just half of the information. Give us the link to where you found it.
We (you) need to read the context.
Currently we don't know whether it shows
* current
* voltage
* duty cycle
* anything else

Klaus
 

cupoftea

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The slope is the di/dt = V/L where L is the coil inductance. V is the DC bus of the 3Phase brij.
Remember in a BLDC , you have the coil to coil commutation...and also, the high frequency current regulation commutation within that. Basically a 3 phase bridge is 3 step down buck converters, which control their output current.
 

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