9.14 Sine-wave Filters
When a motor is controlled by a frequency converter, resonance noise will be heard from the motor. This noise, which is the result of the design of the motor,
arises every time an inverter switch in the frequency converter is activated. The frequency of the resonance noise thus corresponds to the switching frequency
of the frequency converter.
The filter reduces the accel time of the voltage, the peak load voltage U
PEAK
and the ripple current
Δ
I to the motor, which means that current and voltage become
almost sinusoidal. Consequently, the acoustic motor noise is reduced to a minimum.
The ripple current in the Sine-wave Filter coils, will also cause some noise. Solve the problem by integrating the filter in a cabinet or similar.
AF-650 GP Design Guide
180
9
Summary of Contents for AF-650 GP Series
Page 5: ...AF 650 GP Design Guide 4 1...
Page 53: ...AF 650 GP Design Guide 52 4...
Page 97: ...Please note airflow directions 6 1 5 Mechanical Dimensions AF 650 GP Design Guide 96 6...
Page 98: ...Please note airflow directions AF 650 GP Design Guide 97 6...
Page 99: ...Please note airflow directions AF 650 GP Design Guide 98 6...
Page 100: ...Please note airflow directions AF 650 GP Design Guide 99 6...
Page 173: ...Max cable length 150 m AF 650 GP Design Guide 172 9...
Page 179: ...AF 650 GP Design Guide 178 9...