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Kollmorgen AKD-P01207-NBCR
Product Name: AKD Series Servo Drive, Position Indexer, 12 A, 240/480 V AC, with Regenerative Resistor
Product Introduction: Very similar to AKD-P01207-NBC but “R” at the end explicitly denotes internal regenerative braking resistor included. This avoids needing an external resistor for moderate regenerative loads.
Detailed content
Technical Specifications:
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Same electrical core as AKD-P01207-NBC:
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12 A continuous, 36 A peak
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240/480 V AC input
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~8 kW
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Built-in position indexer
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Feedback: Resolver/SineCos/EnDat/etc. (NBCR config)
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Added: Internal brake resistor mounted within drive chassis.
Functional Features:
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Regen management: Internal resistor dissipates decel energy up to drive’s rated regen capacity.
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Reduced panel space: No external resistor cabinet space needed for light regen apps.
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Same tuning/commissioning tools as AKD family.
Material & Structure:
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Enclosure: Slightly deeper or vented section for resistor thermal dissipation.
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Resistor: Wirewound high-power element with thermal cutoff.
Working Principle:
During motor deceleration, kinetic energy returns to DC bus; when bus voltage rises above threshold, internal IGBT switches resistor across bus to dissipate energy as heat, protecting bus capacitors.
Application Scenarios:
Vertical axis (counterbalance insufficient), frequent start-stop cycles, unwinders/rewinders with moderate regen, packaging machines with cyclic motion.
Installation Requirements:
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Ensure ventilation around drive — internal resistor generates heat; ambient temp derating may apply.
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Still possible to add external resistor if internal insufficient (parallel regen paths supported).
Usage Precautions:
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Internal resistor has limited energy capacity (watt-seconds/Joules) — continuous heavy regen will overheat; monitor drive fault “Regen Limit”.
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Do not block top/bottom vents.
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If “R” unit replaced by non-R, must add external resistor.
