Single-phase half-bridge inverter in Power Electronics - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the main components of a single-phase half-bridge inverter.

Power Electronics

The single-phase half-bridge inverter consists of two switches and two [1] capacitors connected in series.

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Afilter

Bload

Cac

Ddc

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing AC capacitors with DC capacitors.

Thinking the capacitors are part of the load.

The two capacitors in a half-bridge inverter are DC capacitors connected in series to split the DC voltage.

2fill in blank

medium

Complete the code to describe the output voltage waveform of a single-phase half-bridge inverter.

Power Electronics

The output voltage of the inverter switches between +Vdc/2 and [1] with respect to the midpoint of the capacitors.

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A-Vdc/2

BVdc

C0 V

D-Vdc

Attempts:

3 left

💡 Hint

Common Mistakes

Assuming the output swings between 0 and Vdc.

Confusing the midpoint voltage with ground.

The output voltage alternates between +Vdc/2 and -Vdc/2 relative to the midpoint of the capacitors.

3fill in blank

hard

Fix the error in the statement about the switching sequence of the inverter.

Power Electronics

When switch S1 is ON, switch [1] must also be ON to avoid short circuit.

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AS4

BS2

Cnone

DS3

Attempts:

3 left

💡 Hint

Common Mistakes

Thinking both switches can be ON at the same time.

Confusing the switch labels.

In a half-bridge inverter, when one switch is ON, the other switch must be OFF to prevent a short circuit.

4fill in blank

hard

Fill both blanks to complete the formula for the RMS output voltage of the inverter.

Power Electronics

The RMS output voltage V_rms = Vdc [1] sqrt([2]), where Vdc is the DC input voltage.

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A*

B0.5

C0.25

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition instead of multiplication.

Using incorrect fraction inside the square root.

The RMS voltage of a half-bridge inverter output is Vdc multiplied by the square root of 0.25 (which is 1/4), representing the half voltage squared.

5fill in blank

hard

Fill all three blanks to complete the dictionary comprehension that maps switch states to output voltage levels.

Power Electronics

switch_states = { [1]: [2] for [3] in ['S1_ON', 'S2_ON'] }

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A'S1_ON'

BVdc/2

C'S2_ON'

DVdc

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names instead of string keys.

Mixing up the voltage values.

The dictionary maps the switch 'S1_ON' to +Vdc/2 and 'S2_ON' to -Vdc/2 (here simplified as Vdc/2 for the example).