VSD with pf correction and passive filter |
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VSD with pf correction and passive filter |
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 Dec 4 2003, 05:14 PM
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#1
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Junior Member  Group: Members Posts: 5 Joined: 29-October 03 Member No.: 537  |
Can I use a capacitor with passive filter to improve the pf of the motorwith a VSD?;p;
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Dec 4 2003, 06:35 PM
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#2
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Posting Freak Group: Moderator Posts: 2,115 Joined: 24-April 02 From: Christchurch, New Zealand Member No.: 1 |
Hello Daniel
1. You must never connect any form of capacitor on the output of a VSD or soft starter without the manufacturers approval. 2. The power factor seen by the supply when using a VSD with a motor, is that of the VSD, the power factor of the motor is irrelevant due to the DC link. 3. The power factor of a VSD varies, but is less than 1 due to the presence of harmonics, rather than inductive current. To improve the power factor of a VSD, you need to use a filter in series with the input. This can range from a simple line reactor to a comples filter assembly, depending on the specifications required. - talk to the VSD manufacturer. Best regards, -------------------- Mark Empson administrator
Skype Contact = markempson | phone +64 274 363 067 LMPForum | LMP Tech Warehouse | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | LMP Software | Mark Empson Website |
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