Capacitor Modules; General; Important Notes - Kollmorgen SERVOSTAR 300 Manual

Accessories Europe | 9 Capacitor Modules

9 Capacitor Modules

9.1 General

KCM modules (KOLLMORGEN Capacitor Modules) absorb energy generated by the motor
when it is operating in generator mode. Normally, this energy is dissipated as waste via
brake resistors. KCM modules, however, feed the energy they have stored back into the DC
Bus link as and when it is required.
KCM-S Saves energy: The energy stored in the capacitor module during generative brak-
KCM-P Power in spite of power failure: If the power supply fails, the module provides the
KCM-E Expansion module for both applications. Expansion modules are available in two

9.2 Important notes

DANGER
DC Bus link terminals in servo systems carry high DC voltage of up to
900 V. Touching the terminals while they are carrying voltage is
extremely dangerous. Switch off (disconnect) the line voltage. You must
only work on the connections when the system is disconnected.
It can take over an hour for the modules to self-discharge. Check the state
of charge with a measuring device that is suitable for a DC voltage of up
to 1,000 V. When measuring a voltage of over 60 V between the
DC+/DC- terminals or to ground, discharge the modules as described in
the KCM Instructions Manual.
You must read the instructions manual for the servo amplifier/servomotor you are using in
your application and observe the safety instructions they contain before commencing mount-
ing/installation work.
Wiring diagram and more important notes concerning wiring can be found in the KCM instruc-
tions manual and in the instructions manual of the used servo amplifier.
38 Kollmorgen | December 2014
ing is available the next time acceleration happens. The module's inception
voltage is calculated automatically during the first load cycles.
servo amplifier with the stored energy that is required to bring the drive to a stand-
still in a controlled manner (this only applies to the power supply voltage; battery-
back the 24 V supply separately).
capacitance classes.