Typical dv/dt in VFD's
Typical dv/dt in VFD's
(OP)
What is the typical dv/dt value in a 415 V, 50 Hz input VFD ? Is there a thumb rule like 10 times input voltage ?
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RE: Typical dv/dt in VFD's
In working with a few different VFDs I've used MTE's products. They seem a bit more focused on VFD applications than Hammond. Some MTE info of possible value is at
http://www.mtecorp.com/solving.html
Hammond transformers info says:
FAQ 108.
What is the typical "RC" DV/DT Filter Reactor performance?
The RC series DV/DT filter reactors combine appropriate values of inductance, capacitance and resistance to form a filter, which reduces DV/DT and peak voltages from the PWM voltage waveform. This combined with a 3% impedance reactor that will reduce motor heating harmonics, will significantly increase the life of the motor.
Long lead length motor drive applications can experience motor terminal peak voltage spikes twice the DC bus voltage, and higher. Therefore motor terminal voltage peaks of 1200 volts for 480V drives and 1600 volts for 600V drives are not uncommon. The highest peak voltages will typically occur in lower HP applications.
RE: Typical dv/dt in VFD's
RE: Typical dv/dt in VFD's
www.gambica.org.uk/pdfs/Report1_3rd%20Edition.pdf
RE: Typical dv/dt in VFD's