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#32
06-01-2011, 12:51
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Re: Modeling motor control
Actually, you're both wrong. Sort of. The control scheme for the motor only pulses the high side FET for a direction, and leaves the low side FET on. So one low side FET remains conducting during the entire PWM cycle, and you only have the forward drop from the opposing low side FET when the current cycles back through in that direction. And since we're talking about the motor inductance driving the current in the off phase, the voltage is going to increase to compensate for that 1V drop anyways.
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