Siemens SINAMICS S120 Manual Aplikasi - Halaman 32

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Hardware

4.3 Decoupling Motor Modules

4.3

Decoupling Motor Modules

To limit possible circulating currents between each Motor Module of the parallel connection and

the asynchronous motor, a minimum inductance per converter output is required.

You can achieve the minimum inductance in 2 different ways:

● Adherence to the minimum cable lengths between the Motor Modules connected in parallel

and the asynchronous motor

- OR -

● Adherence to the minimum cable lengths with the additional use of motor reactors at the

output of each Motor Module

Note

Same motor cable lengths

The minimum cable lengths must be the same length within the setup.

Minimum cable lengths without motor reactors

When the length of the motor cable is specified in the table, it is assumed that 1 m of motor cable

typically has an inductance of 1 µH.

Table 4-1

Description

Power [kW]

Rated current [A]

Required inductance per Motor Module [µH] 40

Motor cable lengths

Minimum cable length [m] per line/without

motor reactor

Inductance - Minimum cable length

6SL3120-1TE31-3AA3

132

Motor Modules Booksize parallel connection

Application Manual, 01/2020, 6SL3097-5BF00-0BP0

6SL3120-1TE32-0AA4

107

200