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Build Your Online Product Catalogs?
| Product Name: |
Variable frequency drive for AC motor
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| Supply Ability: |
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| Related proudcts |
ac drive, vfd, |
| Specifications |
Gozuk Variable Frequency Drive |
| Price Term: |
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| Port of loading: |
China |
| Minimum Order |
1unit |
| Unit Price: |
1USD/VFD |
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On the line side of a variable frequency drive, the problem is generally distortion power factor rather than displacement and passive harmonic filters for 5th, 7th etc. are sometimes used to mitigate the effects of the harmonics. And to comply with agreed contract limits on voltage distortion. One of the constraints is that the filters are capacitive at the fundamental and, with no lagging displacement power factor to correct, there is the risk of leading power factor.
Active harmonic correction that uses both capacitos and inductors that are switched based on the harmonic 'load' is the solution. Individual capacitors, even if they are switched with the drive tend to produce overvoltages and even higher harmonics under certain cases.
VFD load power factor correction attempt is:unncecessary futile.
Having said that there are devices installed at the motor end that contain capacitors among other components that do help with the mitigation of both harmonics and standing wave voltages. They are useful on variable frequency drive rated motors and will save your standard, older motors. (Little known secret: you can also increase your cable length by about 30%. The VFD manufacturers won't tell you this, but it is true.) |
| Company: |
VFD Manufacturer
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| Contact: |
Mr. Fank Fang |
| Address: |
Building 2 Xuwu Gongle Xixiang, Bao'an District Shenzhen |
| Postcode: |
518000 |
| Tel: |
8675528480241 |
| Fax: |
008675528480233 |
| E-mail: |
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