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What's the relationship between frequency and voltage in PWM?

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neroburn

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Hello there,

May I know what the relationship between frequency and voltage.? How to get the best rate of frequency to control the motor?
 

Re: Frequency PWM

Following two eauation may help you.

DeltaI = (Vdc / L) * T

T = Pwm period
Vdc = DC bus voltage
L = inductanse
Delta I = Maximum current ripple near the set point
---------------------------------

Fmaxac= Fpwm / (Pwm resolution) with direction signal

or

Fmaxac= Fpwm / (2*Pwm resolution) without direction signal

Fmaxac, frequency of produced AC power signal
 

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