8400 HighLine | Parameter setting & configuration
Motor control (MCTRL)
Braking operation/braking energy management
194 L Firmware ≤ 05.00 - DMS 4.2 EN - 02/2010
Tip!
If it is possible to dispense with exact adherence to the deceleration ramp in simple
applications, selection of a braking method without
an external brake resistor
enables costs to be reduced due to the avoidance of having to use a brake resistor .
A combination of all three braking procedures is also possible, e.g. for emergency
braking if the brake resistor fails
(C00175
= "4: Brake resistor + FI_MotBrk + RfgStop").
5.10.2.1 Inverter motor brake
This function extension is only available from version 04.00.00!
With this braking method, which can be selected as an alternative in C00175
, the
regenerative energy in the motor is converted as a result of dynamic acceleration/
deceleration with down-ramping of the ramp function generator..
Operating mode of the inverter motor brake
The ramp function generator is stopped during acceleration. The speed set in C00987
is
added to the speed setpoint by means of a hysteresis-type 2-point DC bus voltage
controller, whereby the sign of the current actual speed is taken into account. In addition,
the ramp function generator is stopped during overvoltage.
If the DC bus voltage falls below a defined DC bus voltage potential of the hysteresis
controller, the added speed is subtracted again and the ramp function generator is
activated again.
The energy is converted into heat in the motor due to alternating instances of acceleration
and deceleration as a result of this switching operation.
Stop!
• This braking method only works without intervention of a position controller
in the case of speed-controlled applications!
• Do not additionally adapt
the motor load (I2xt) if the inverter motor brake is
used!
Otherwise, the motor has a risk of thermal overload, or the Motor load
monitoring (I2xt) does not properly work, respectively!
efesotomasyon.com - Lenze
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