Bosch Rexroth HMU05.1N Series, Руководство по планированию проекта

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4.3.4 Leakage capacitances
Allowed leakage capacitances
Capacitive leakage currents arise due to the clocked operation of an inverter
in conjunction with the leakage capacitances of the motor power cables and
the leakage capacitances of the motors.
In order for the drive system to run in accordance with its intended use, the
values of the capacitive leakage currents have to be limited.
When sizing drive systems with HMU05 take the maximum allowed leakage
capacitances into account.
Comply with the allowed cable capacitance for motor chokes or balancing
chokes.
See also
chapter 11.5 "Determining the leakage capacitance" on page 383 .
HMU05 systems for medium leakage capacitances
HMU05 systems with a single supply unit
At a single HMU05 supply unit, it is possible to connect cables and motors
with a total leakage capacitance of 500 nF.
The number and operation mode (individual or parallel operation) of the
HMU05 inverters are irrelevant.
HMU05 systems with supply units connected in parallel
For supply units connected in parallel, the maximum allowed leakage capaci‐
tance increases by 500 nF with each additional supply unit.
A derating factor of 0.95 applies to the allowed total leakage capacitance.
The number and operation mode (individual or parallel operation) of the
HMU05 inverters are irrelevant.
C
ab_Kx
Leakage capacitance of motor power cable
C
ab_Mx
Leakage capacitance of motor
Fig. 4-3: HMU05 systems with supply units connected in parallel
DOK-INDRV*-HXX05******-PR02-EN-P Bosch Rexroth AG 53/407
Rexroth IndraDrive ML Drive Systems with HMU05
Combining the individual components