3 avoiding thermal overload of the brake resistor, Avoiding thermal overload of the brake resistor, Avoiding thermal – Lenze E84DSxxx User Manual
Page 178: Overload of the brake resistor, 5motor control (mctrl)
5
Motor control (MCTRL)
5.9
Braking operation/brake energy management
178
Lenze · 8400 protec StateLine · Reference manual · DMS 4.2 EN · 03/2013 · TD05
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For sensorless vector control (SLVC):
• Set reduced brake chopper threshold (
) to approx. 70 V.
• Set additive speed (
) to 2 ... 4-fold rated slip speed.
• Adapt the deceleration ramp so that the deceleration time is slightly below (10 ... 30 %)
the deceleration time that can be realised with the inverter motor brake.
5.9.3
Avoiding thermal overload of the brake resistor
• Parameterisation of an error response in
and evaluation of the parameterised error
message within the application or within the machine control system.
• See chapter entitled "
Brake resistor monitoring (I2xt)
• External interconnection using the thermal contact on the brake resistor (e.g. supply
interruption via the mains contactor and activation of the mechanical brakes).