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Locked Anti Phase PWM is used to drive brushed DC Motors, but does it make sense to use it for a BLDC, e.g. 3 Phase Motor?

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but does it make sense to use it for a BLDC, e.g. 3 Phase Motor?

No, it doesn't make complete sense because, in a three phase motor drive, one half of each of the three H bridge drives can remain at DC bus voltage or bus ground per AC half cycle and hence you reduce switching losses. Preferred way at the top: -

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You can still drive the motors with anti-phase PWM if you want but the losses will be greater for no clear benefit.

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