BENSHAW Rsi S Series, Instruction Manual, Page: 111 / 398

Learning Advanced Features
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Note that when the load has a high inertia and the motor is operating at high speed, the load’s inertia
can cause the motor to continue rotating for a period of time after inverter output has been turned off.
Power Braking
During deceleration, when the inverter’s DC voltage rises above a specified level due to motor
regenerated energy, a inverter adjusts the deceleration gradient level and can accelerate the motor
in order to reduce the regenerated energy. Power braking can be used when short deceleration
times are needed without brake resistors, or when optimum deceleration is needed without
causing an over voltage fault.
Group Code Name LCD Display Parameter Setting Setting Range Unit
Ad 08 Stop mode Stop Mode 4 Power Braking 0–4 -
•
To prevent overheating or damaging the motor, do not apply power braking to the loads that
require frequent deceleration.
•
Stall prevention and power braking only operate during deceleration, and power braking takes
priority over stall prevention. In other words, when both Pr.50 (stall prevention and flux
braking) and Ad.08 (power braking) are set, power braking will take precedence.
•
Note that if deceleration time is too short or inertia of the load is too great, an overvoltage fault
may occur.
•
Note that when power braking stop is used, the actual deceleration time can be longer than
the pre-set deceleration time.