6 Function & parameter description
Group 7 – Auxiliary Functions
90 Lenze · Inverter i510 / i550 - Cabinet · Operation Manual · 0.4 EN · 02/2016
6.9.4 Regenerative energy management
0: Brake resistor (only 550)
If the threshold voltage is exceeded the braking resistor is energized.
1: Deceleration override
The motor will stop decelerating momentarily if the threshold voltage threshold is exceeded. (Maximum 4 s)
2: Resistor and deceleration override (only 550)
Combination of brake resistor and deceleration override
3: Compound and deceleration override
Combination of compound brake and deceleration override
The compound is an alternative where the inverter will superimpose a temporary increase to the speed setpoint
to force the drive to cycle between decelerating and accelerating to maintain control of the DC Bus. Compound
braking will cause the regenerative energy to be bled off of the motor in the form of heat. This results in the mo-
tor temperature rising and must be used with care to not shorten the life of the motor.
4: Resistor/compound/override (only 550)
Combination of brake resistor compound brake and deceleration override.
Brake resistor failure
A wrong dimensioned brake resistor can lead to a component failure.
Use the brake resistor specified for the inverter.
Avoid thermal overload of the brake resistor
Set the correct parameter for the braking resistor
Thermal overload of the motor
During compound braking the motor overload monitoring (I2xt)is not adapted. If the braking too frequently,
there is a risk of the motor being thermally overloaded.
Avoid long braking times using the compound braking.
The Compound Braking function must not be used with vertical conveyors (hoists) or with active loads!
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