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Dynamic Braking on AC DrivesACInputDCBusCaps+_V DC FeedbackDBRMDB is ACTIVE when:• Motor has an overhauling load• Fast decel of high-inertial load• Stopping in ramp-to-rest modeSIGNALDYNAMICBRAKINGCONTROLDB is NOT ACTIVE when:• Decelerating a frictional load• Stopping in coast-to-rest mode• Drive has Overvoltage or abrake resistor/switch fault or ifpower is removed25DYNAMIC BRAKING is typically an option for AC DrivesA seventh IGBT, integrally mounted, is modulated when DC Bus voltage isexcessive.Resistor Grids (external on ratings 5 HP & above) dissipate the excess energy.DB is duty-cycle limited to a set number of stopping operations
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