For cable lengths up to 100 meters (and motor suitable for inverter applications) it is not necessary a filter; for lengths from 100 to 200 meters, a series reactance can be used; for greater lengths it is necessary an LC filter at inverter terminals. The limit lengths can be different from different manufacturers and voltage levels (LV/MV).
In DC breaking, frequency inverter injects DC current in stator of Motor & with that DC current Stator will try to lock the rotor. There will be stationary field instead of rotating field in between stator & Rotor of Motor.
This is DC breaking i.e. DC injection, this application being used in cranes for increasing starting torque & in some handloom machine for breaking applications where mechanical breaks are not available or suitable.
This is DC breaking i.e. DC injection, this application being used in cranes for increasing starting torque & in some handloom machine for breaking applications where mechanical breaks are not available or suitable.
AC reactors reduce harmonics, mitigates transient conditions and helps to maintain proper phase to phase voltages. DC reactors will also mitigate harmonics however it will provide more harmonic attenuation than a equally sized AC reactor.
The engineers in AC Drive China are very professional in Chinese automation industrial control fields, provide you comprehensive energy saving solutions.
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Frequency directly represents no of rotation of rotor for that machine,
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