7
OUTPUT FILTERS
7.0.1 Sinusoidal Output Filter
WEG sinusoidal filters have been developed with the purpose of reducing the voltage and current harmonic content at medium voltage motors
power supply. They are compatible with new or already existent motors, and make it possible to drive motors without distance limitation
between the MVW01 and the motor.
Besides the inductor and the capacitor, the sinusoidal filter is formed by a contactor in series with the capacitive branch. This contactor has
the function of disconnecting the capacitors in case of an inverter failure, avoiding, thereby, resonances between the filter and the motor. The
need to use the contactor must be evaluated for each application.
Inverter InverterSenoidal filter Senoidal filter
Senoidal filter
Inverter A
Inverter B
Motor
Motor
Motor
Figure 7.2: Possible configurations of sinusoidal filters
✓
NOTE!
When the product features the option “sinusoidal output filter” the inverter comes from the factory enabled to operate with
it. However, this function will be only available in the scalar control mode (P0202 = 0, 1 or 2) and when specified in the project
requirements.
✓
NOTE!
Inverter losses will be higher for operations with a sinusoidal filter.
Besides the creation of P0011, parameters P0003 and P0400 were changed in order to adapt the use of the MVW01 with sinusoidal output
filter. The description of these parameters can be found in Programming Manual available at www.weg.net
MVW01 | 7-3
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