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AKD2G/AKD/S700 Accessories Manual | 11 Brake/Regeneration Resistors
11 Brake/Regeneration Resistors
During braking with the aid of the motor, energy is fed back into the drive. This energy is dissipated as heat in
the regeneration resistor (referred to as a brake resistor when used with an S700 drive). The regen resistor is
switched on by the brake circuit. Different resistance values must be used depending on the drive. All regen
resistors meet the requirements of CE directives and are UL-registered. Regen resistor requirements for Koll-
morgen™ servo systems can be calculated using the
11.1 Safety Instructions
You must read the instruction manuals for the drive and motor that you are using in your application
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and observe the safety instructions they contain before starting mounting/installation work.
This manual is only valid in conjunction with the instruction manuals for the drive and motor you are
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using in your application.
Danger of burn. Mount only in switchgear cabinets, observe installation clearances, provide the
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requisite conditions for unobstructed convection for cooling. As Regen resistors can heat up to tem-
peratures in excess of 250°C, use temperature-resistant components in the vicinity of the resistor.
Observe allowed mounting positions (see dimension drawings). The connection terminals must never
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be in the ulertion area of hot air.
In case of insufficient cooling or false mounting the resistor or the surrounding devices could be over-
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heated or damaged.
A connection diagram appears in the drive's instructions manual.
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For best results, the following conditions must be provided for regen resistors:
Unobstructed cooling air
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Unobstructed ulersion of warmed air
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Rated data with maximum ambient temperature 40°C, in case of ambient temperature higher than
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40°C, power must be reduced by 4% per 10K temperature rise.
44 Kollmorgen™ | kdn.kollmorgen.com | November 2019
Motioneering sizing and selection tool
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