I have an application which uses a PCB to control a big AC fan (approx 1300VA) and a cartridge heating element. Since the application will be operated on regular mains, there needs to be some form of Line filtering, considering the motor is a big inductive load. Note that it is designed for 230v 50Hz european mains.
Searching the internet i found a few methods of filtering:
- A common mode choke filter
- A balanced LC filter
The common mode choke: Farnell To be used directly at the mains. And possibly a smaller one only before the control PCB to prevent the motor from releasing its voltage spikes in the control circuit. Though what worries me is that the Farnell page only lists DC current and not AC.
The balanced LC filter, to be used in the same locations, for the same reasons.
As for specifications: it doesn't need to be perfect, it should just prevent the device from misbehaving and from terrorizing other devices in the vicinity
The question is: will these work/ which one is better?
EDIT: i should have mentions that the motor is being switched by a TRIAC + RC snubber circuit. The heating element is switched using a relay.