Generation of the output voltage

Generation of the output voltage for the AX5000 servo drive is based on a PWM clock frequency of 8 kHz. In order to reach an acceptable compromise between power loss and requirements for the insulation system of the motor, the AX5000 operates with a maximum rate of voltage rise (d_u / d_t) of 5 kV per µs.

IDN P-0-0001 (Switching frequency of the IGBT module) Further information on the clock frequency of the AX5000 servo drive can be found in the description of the IDN parameters (www.beckhoff.de) under: P-0-0001 (Switching frequency of the IGBT module).

The voltage profile at the servo drive output described above results in certain requirements for:

• the cable configuration,
• the cable length and
• the insulation system of the motor.

If Beckhoff cables and motors are used, all requirements are met, based on the procedures described in chapter „Motors and cables for servo drives“.

EMC-compliant commissioning Further information on EMC-compliant commissioning can be found in the AX5000 EMC leaflet, which is available on the Beckhoff website (www.beckhoff.de).