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Countermeasure against inverter noise
The flow meter indication fluctuates when the inverter (exhaust fan) starts operating.
I changed the wire routing on the inverter output side, but it did not work. Other possible causes include noise from the power supply, and I am considering to insert filters to both the inverter input side and flow meter input side.
Which filter should I use to the inverter input side?
1. Electromagnetic noise filter
2. Line noise filter
3. Radio noise filterIf the problem still persists, what else should I check for?
Inverter
FR-A220-7.5KP (1), FR-A220-1.5KP (1)
Flow meter
ST-581 (2)
I changed the wire routing on the inverter output side, but it did not work. Other possible causes include noise from the power supply, and I am considering to insert filters to both the inverter input side and flow meter input side.
Which filter should I use to the inverter input side?
1. Electromagnetic noise filter
2. Line noise filter
3. Radio noise filterIf the problem still persists, what else should I check for?
Inverter
FR-A220-7.5KP (1), FR-A220-1.5KP (1)
Flow meter
ST-581 (2)
- Category :
Answer
You can attach the following filters to the inverter input side:
- Line noise filter (FR-BLF, FR-BSF01)
- Radio noise filter (FR-BIF)
While it is a good idea to insert a filter on the input side since changing the wire route on the inverter output side has no effect. I also recommend you the following countermeasures:
- Earth (ground)Use a dedicated earth (ground) for the inverter as far as possible.
Use the thickest and shortest possible earthing (grounding) cable.
- Use a metal conduit or shielded cable for the power supply cable.
- Use twisted pair cables for sensor signal cables.The technical note No.21 (noise and leakage current) provides the summary of relationship between noise and other factors.
Contact us for this material.
- Line noise filter (FR-BLF, FR-BSF01)
- Radio noise filter (FR-BIF)
While it is a good idea to insert a filter on the input side since changing the wire route on the inverter output side has no effect. I also recommend you the following countermeasures:
- Earth (ground)Use a dedicated earth (ground) for the inverter as far as possible.
Use the thickest and shortest possible earthing (grounding) cable.
- Use a metal conduit or shielded cable for the power supply cable.
- Use twisted pair cables for sensor signal cables.The technical note No.21 (noise and leakage current) provides the summary of relationship between noise and other factors.
Contact us for this material.
- Product Name
- Inverter, magnet motor drive
- Product Category
- Others
- Series
- FR-A500
