Pulse Width Modulation (PWM) is a technique used in embedded systems to control power depery to devices such as motos, LED, and heaters. Calculating that e duty cycle is essential for precise control of these devices. This guide provides a step- by- step process to determinate thoe duty cycode in PWM- controlled applications.

Understanding PWM and Duty Cycle

Te duty cycle represents the power reserved to thee cheadd. A duty cycle of 50% means the signal is high half thee time, while 100% means it is always high.

Calculating te Duty Cycle

To calculate te duty cycle, you need to know thee desired output level and thee PWM period. Te basic formula is:

CLAS1; CLAS1; CLAS3; CLAS3; CLAS3; Duty Cycle (%) = (On Time / Total Periodid) × 100 CLAS1; CLAS1; CLAS1; CLAS3; CLAS3; CLAS3;

Step-by- Step Calculation

  • Určete si, zda je to běžné.
  • Rozhodněte se, že desired output level, expressed a conditage.
  • Calculate te on-time by multiplying that e total period by te desired duty cycle equilage divided by100.
  • Use the formula to find the duty cycle if the on- time and period are known.

Example Calculation

Suppose you have a PWM frequency of 1 kHz, and you want a duty cycle of 75%. Te total period is 1 ms (1000 μs). Te on- time is:

On Time = 75% of 1 ms = 0,75 ms (750 μs)

This means the PWM signal should d stay high for 750 μs and low for 250 μs in each cycle to dosahovat the desired duty cycle.