Firmware
≤
02.00 - DMS 2.1 EN - 03/2011
L
53
8400 motec | Software Manual
Motor control (MCTRL)
Special features of the 8400 motec
5.1
Special features of the 8400 motec
In contrast to other Lenze inverters, the 8400 motec controller has a reduced DC-bus
capacity. This causes some special features which the user must consider.
The closed design of the 8400 motec controller and the heat input of the motor increase
the internal temperature. However, the use of film capacitors in the DC bus ensures a high
service life.
The used capacitors have a lower capacity. This causes the following:
Less energy can be stored in the DC bus.
The DC-bus voltage increases faster during braking operation.
The DC-bus voltage has a higher voltage ripple.
The medium DC-bus voltage is slightly reduced.
The controller cannot be connected to the 1-phase mains.
The voltage ripple in the DC bus must not be transmitted to the motor. Otherwise a varying
torque would be caused. The compensation of the voltage ripple causes the maximum
motor voltage to only reach 88 % of the mains voltage (see also display of the motor
voltage in
).
The reduced energy absorption of the DC bus may cause special measures to be taken for
braking loads. This can concern e.g. the use of an external brake resistor or the choice of a
larger deceleration time.
Summary of Contents for 8400 motec Series
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