Calculadora de Ciclo de Trabajo PWM Gratis
Calcula el ciclo de trabajo y voltaje promedio de una señal PWM. Para control de motores y LEDs.
V
%
Ω
Average Voltage
9.00 V
Average Power10.80 W
Peak Current1.200 A
Average Voltage vs PWM Amplitude
Fórmula
## PWM Duty Cycle ### Formulas **V_avg = V_amplitude x D** **P_avg = V^2 x D / R** Where D is the duty cycle (0 to 1). PWM is used for motor speed control, LED dimming, and switching power supplies.
Ejemplo Resuelto
12 V PWM at 75% duty cycle driving a 10 ohm load.
- 01D = 75 / 100 = 0.75
- 02V_avg = 12 x 0.75 = 9 V
- 03P_avg = 144 x 0.75 / 10 = 10.8 W
- 04Peak current = 12 / 10 = 1.2 A
Preguntas Frecuentes
What frequency should I use?
Depends on application. Motors: 1-20 kHz. LEDs: above 200 Hz to avoid flicker. Switching regulators: 100 kHz to several MHz.
Is average voltage the same as DC?
For resistive loads with filtering, yes. Without filtering the load sees pulsed voltage.
How does PWM save power vs. linear?
The switch is either fully on or off, so it dissipates minimal power compared to a linear regulator which drops voltage as heat.
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