On 08/04/2020 02:05 PM, Thaddeus Waldner wrote:
Do any servos or VFD systems actually run their base frequency higher than
20khz?
If not, where do those harmonics come from?
Many servo systems run above 20 KHz to increase bandwidth.
And, the sharp switching transitions cause there to be many
harmonics. Most VFDs do not run above 20 KHz to keep
switching losses low, and the drive frequencies to the motor
are usually lower than with a servo.
Jon
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