Selecting PWM Harmonics Manually

This procedure shows how to select one PWM harmonic after the others. Then, this selection can be processed.

To Select PWM Harmonics Manually:

Prerequisites: You need to open or calculate a time frequency representation.
  1. Detect PWM harmonics.
  2. From the toolbar, select the PWM harmonics selection by hand tool .
  3. Move the PWM harmonics selection by hand tool on the representation.
  4. If needed, verify the cursor position information in the left bottom corner of the main window.
    Note: T is the time in seconds. F is the frequency in Hertz. O is the PWM harmonic number. A is the amplitude in dB. Fc is the constant frequency in Hertz.
  5. Click the representation.

    The PWM harmonic is manually selected.

    To select several orders (one order after the other), click again the representation.

    Tip: If you need to deactivate the PWM harmonics selection by hand tool, press Esc.
    Tip: Once the order is selected, you can modify it.

The PWM harmonics are selected.