VLT® dU/dt Filter MCC 102 Fact Sheet
■dU/dt filters are differential-mode filters which reduce motor terminal phase-to-phase peak voltage spikes and reduce the rise time to a level that lowers the stress on the insulation of motor windings.
■Compared to sine-wave filters, the dU/dt filters have a cut-off frequency above the switching frequency. The voltage at the motor terminals is still PWM pulse shaped, but the rise time and Upeak are reduced. They are smaller, weigh less and have a lower price compared to sine-wave filters. Furthermore, because of the smaller inductance and capacitance, the dU/dt filters introduce a negligible reactance between inverter and motor and are therefore suitable for high dynamic applications.
■Superior compared to output chokes
▲Output chokes cause undamped oscillations at the motor terminals which increase the risk of double pulsing and over-voltages higher than twice the DC link voltage. The dU/dt filters are low-pass L-C filters with a well defined cut-off frequency. Therefore the ringing oscillations at the motor terminals are damped and there is a reduced risk of double pulsing and voltage peaks.
■Quality and Design
▲All dU/dt filters are designed and tested for operation with the VLT® AutomationDrive FC 302, VLT® AQUA Drive FC 202, and the VLT® HVAC Drive FC 102. They are designed to match the look and quality of the VLT® FC series drives.
■Advantages
▲Compatible with all control principles, including flux and WC+
▲Parallel filter installation is possible for applications in the high power range
■Range
▲3 x 200 – 690 V (up to 880 A)
■Enclosures
▲IP00 and IP20/23 enclosure in the entire power range
▲IP54 enclosure available up to 180 A
■Mounting
▲Side-by-side book-style mounting alongside the drive, for wall-mounted filters only.
▲Footprint mounting behind the drive, for limited size range only
▲Wall mounting up to and including filter rating 590 A (380 V )
▲Floor mounting above filter rating 303 A (380 V )
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Technical Documentation |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2015.06 |
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DKDD.PFO.615.A2.02 |
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210 KB |
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