2nd harmonic in PWM drive
2nd harmonic in PWM drive
(OP)
Why is there a special concern over the 2nd harmonic in a PWM drive (on the DC link)?
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2nd harmonic in PWM drive
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RE: 2nd harmonic in PWM drive
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RE: 2nd harmonic in PWM drive
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RE: 2nd harmonic in PWM drive
RE: 2nd harmonic in PWM drive
The "special concern" arose from the following comments in a report:
Limitations on the DC link due to increased 2nd harmonic (if any):
Doubling DC link capacitance with active front end should give no limitation on DC performance. Longevity may be shortened (capacitor life).
RE: 2nd harmonic in PWM drive
The second harmonic of the output frequency on the DC-link will create further harmonics in the output voltage of the inverter as well as in the input current of the rectifier.