Editing PWM
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Frequency describes how often on/off states appear in PWM signal. I.e. if PWM frequency is 20 kHz then there will be 20000 "on" and "off" periods per second. Frequency is typically kept constant over time. | Frequency describes how often on/off states appear in PWM signal. I.e. if PWM frequency is 20 kHz then there will be 20000 "on" and "off" periods per second. Frequency is typically kept constant over time. | ||
− | In motor & power control it is typical to use | + | In motor & power control it is typical to use 15-30 kHz PWM frequency to avoid audible high pitched noise that coils produce when driven by PWM. |
==Usage in GD products== | ==Usage in GD products== | ||
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==Links== | ==Links== | ||
[http://en.wikipedia.org/wiki/Pulse-width_modulation Wikipedia PWM article] | [http://en.wikipedia.org/wiki/Pulse-width_modulation Wikipedia PWM article] | ||
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