Calculadora de Ciclo de Trabajo PWM
Calcula el ciclo de trabajo, frecuencia y tensión promedio de señales PWM.
Fórmula
D = t_on / T × 100%, V_avg = V_cc × D, V_rms = V_cc × √D
Cómo Funciona
Pulse Width Modulation (PWM) is a critical technique in electronics for controlling power delivery and signal characteristics by varying the duty cycle of a periodic signal. The duty cycle represents the proportion of time a signal is in an 'on' state during a complete signal period, typically expressed as a percentage. In electronic systems, PWM allows precise power regulation, motor speed control, and efficient signal transmission by modulating the width of digital pulses.
Ejemplo Resuelto
Calculate the duty cycle for a PWM signal with a pulse width of 2 milliseconds and a total period of 10 milliseconds. Duty Cycle = (Pulse Width / Total Period) × 100% = (2 ms / 10 ms) × 100% = 0.2 × 100% = 20%. This means the signal is active 20% of the time during each complete cycle.
Consejos Prácticos
- ✓Always use consistent time units when calculating duty cycle
- ✓Check signal frequency compatibility with your target system
- ✓Use high-resolution measurement tools for accurate PWM analysis
- ✓Consider microcontroller or specialized PWM generator capabilities
Errores Comunes
- ✗Confusing pulse width with total signal period
- ✗Incorrectly converting time units
- ✗Neglecting signal frequency limitations
- ✗Overlooking system-specific PWM requirements
Preguntas Frecuentes
What is a typical duty cycle range?
Duty cycles typically range from 0% to 100%, with 50% representing an equal mark-to-space ratio.
How does duty cycle affect power delivery?
Higher duty cycles result in more power delivered to the load, while lower duty cycles reduce power output.
Can PWM be used for analog-like control?
Yes, PWM can simulate analog signals by varying pulse width, allowing precise power and signal modulation.
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