7
OUTPUT FILTERS
7 OUTPUT FILTERS
Depending on the installation conditions, the addition of an output dv/dt filter may be necessary, recommended for drive systems with cable
length between 100 (328.08 ft) and 500 m (1640.41 ft), which are designed for application with new WEG motors. For drive systems with
cable length greater than 500 m (1640.41 ft), or for driving already existent motors (retrofit applications (motor not prepared for operation with
inverter)) the use of sinusoidal filters (by consulting WEG) is recommended.
Table 7.1 on page 7-2 presents the line of dv/dt and sinusoidal filters for the MVW01 inverter, according to the description above.
Shielded cables
Inverter
V
DC
Motor
Ground loop
(a) Output reactor - solution for cable length between 100 and 200 m (328.08 and 656.17 ft).
Inverter
V
DC
Motor
Ground loop
(b) RLC dv/dt filter - solution for cable length between 200 and 500 m (656.17 and 1640.41 ft).
Shielded cables
Inverter
V
DC
Motor
Ground loop
(c) Sinusoidal filter - solution for cable length greater than 500 m (1640.41 ft), or for retrofit applications (motor not prepared for
operation with inverter).
Figure 7.1: (a) to (c) Output filters for MVW01 inverters
MVW01 | 7-1
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