2/12/2016 7:49 AM | |
Posts: 1 Rating: (0) |
Hi, I am using a fan with MM 430, 45 KW drive & running a fan with 750 RPM motor of 45 KW. But it draws more current at starting, i.e approximately 120 Amps. Due to this, drive started to decrease frequency. I want to keep frequency at set point as after one minute of starting, Amps of motor will come to 70 Amp. Can I get performance of drive by reducing Pulse frequency to 2 KHz. As by reducing pulse frequency, drive should be able to deliver higher current than rated current at pulse frequency of 4 KHz. Kindly suggest. Regards Lalit Saraswat . ------------------------------------------------------------------------------------------ |
Last edited by: Min_Moderator at: 2/12/2016 10:30:36 AMNew subject after splitting |
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2/12/2016 8:22 AM | |
Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877) |
Hello, I don't think reduction in base frequency will help. The application demand's high inrush torque. How much is ramp up time? Have you tried by increasing it. Please read this FAQ which will help you. |
10/21/2016 12:36 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123) |
New question published by ARLS is split to a separate thread with the subject MM 430, fan problem. Best regards |
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