A pulse width modulator converts DC voltage into ___.

A pulse width modulator converts DC voltage into ___.

• A. AC Voltage
• B. Horsepower
• C. Inductive Current
• D. DC Pulses

Answer: (D)

Pulse width modulation works by rapidly switching a DC supply on and off and adjusting how long it stays on in each cycle. This creates a train of pulses whose width (the duty cycle) changes with the control signal. Because the polarity never reverses, the output is pulsed DC, not a continuous DC level, and not a true AC waveform. The average voltage seen by the load can be varied by changing the pulse width. If you then filter or invert those pulses, you can obtain an AC waveform, but the immediate PWM output is DC pulses.

Pulse width modulation works by rapidly switching a DC supply on and off and adjusting how long it stays on in each cycle. This creates a train of pulses whose width (the duty cycle) changes with the control signal. Because the polarity never reverses, the output is pulsed DC, not a continuous DC level, and not a true AC waveform. The average voltage seen by the load can be varied by changing the pulse width. If you then filter or invert those pulses, you can obtain an AC waveform, but the immediate PWM output is DC pulses.