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

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11.5 Determining the leakage capacitance
The capacitances that generate so-called leakage currents against ground at
the inverter outputs are referred to as leakage capacitance C
ab
. The relevant
values for the total value of leakage capacitance C
ab_g
are:
● Capacitances of output filters
● Capacitances of power cables (capacitance per unit length against
shield and ground wire)
● Capacitances of motors (winding capacitance against housing)
Leakage capacitance consists of the power cable and motor values for all in‐
dividual drives operated on the mains filter.
Calculation:
C
ab_g
Total value of leakage capacitance
C
ab_Mg
Total value of motor leakage capacitance
C
ab_Kg
Total value of cable leakage capacitance
Fig. 11-5: Total leakage capacitance
The total capacitance C
ab_Mg
is the sum of the capacitances of the individual
motors. See motor documentation for these capacitances.
C
ab(motor)
Leakage capacitance of a motor
Fig. 11-6: Total leakage capacitance of motor
C
Y_K typ
Capacitance per unit length of cables
C
ab_Kg
Total leakage capacitance of cables
Fig. 11-7: Total leakage capacitance of cables
The total capacitance C
ab_Kg
is the sum of capacitances of the individual pow‐
er cables. See the technical data of the power cables for these capacitances
per unit length.
DOK-INDRV*-HXX05******-PR02-EN-P Bosch Rexroth AG 383/407
Rexroth IndraDrive ML Drive Systems with HMU05
Appendix