Siemens sinamics G130 Operating Instructions Manual page 14

Motor reactors

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Using a motor reactor and dv/dt filter to limit the voltage gradient and transients

IGBT converter switching frequencies result in high voltage gradients (dv/dt) at the converter

output. If long motor cables are used, this leads to an additional current load on the

converter due to capacitive charge/discharge currents. The high voltage gradients, and the

resulting transients at the motor terminals, cause the motors' electrical winding load to

increase as compared with direct on-line operation. In conjunction with the connected cable

capacitances, the motor reactors with their adapted inductances reduce the capacitive

charge/discharge currents in the motor cables and, as a function of these motor cables, limit

the voltage gradient (dv/dt) and the transients Û

Figure 2-1

Using a motor reactor and dv/dt filter to limit the voltage gradient and transients

at the motor terminals.

Operating Instructions, 04/2014, A5E00409660A

Motor reactors

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