Single-Phase Inverter Quiz

What is the primary function of a single-phase inverter?

• Convert AC to DC

• Convert DC to AC

• Amplify voltage

• Filter AC signal

In a single-phase inverter, the output waveform is typically:

• Pure sinusoidal

• Square wave

• Triangular wave

• Sawtooth wave

SPWM stands for:

• Sine Pulse Width Modulation

• Square Pulse Width Modulation

• Simple Pulse Width Modulation

• Sinusoidal Pulse Width Modulation

What does the modulation index in SPWM represent?

• The ratio of DC input to AC output

• The ratio of reference wave amplitude to carrier wave amplitude

• The frequency of the carrier wave

• The switching frequency of the inverter

For a single-phase inverter, the output frequency depends on:

• The modulation index

• The reference signal

• The carrier wave frequency

• The input DC voltage

The carrier wave in SPWM is typically a:

• Sine wave

• Square wave

• Triangular wave

• Sawtooth wave

In SPWM, the reference wave is usually a:

• Square wave

• Triangular wave

• Sinusoidal wave

• Sawtooth wave

What happens if the modulation index is greater than 1 in SPWM?

• Distortion increases

• Carrier wave frequency increases

• Output becomes pure sinusoidal

• Switching losses decrease

In a single-phase inverter, increasing the switching frequency of the carrier wave results in:

• More distortion in the output

• Higher resolution of the output voltage

• Lower efficiency

• Lower output voltage

Which component primarily determines the harmonic content in SPWM?

• Carrier wave frequency

• Reference wave amplitude

• Modulation index

• Inverter DC input voltage