High-frequency series inverter architecture: To obtain higher power at a given high frequency, a high-frequency series inverter is typically realized as

Introduction / Context:
Series inverters use resonant commutation and are well suited to high-frequency operation. Practical power scaling often requires combining multiple inverter modules. The arrangement chosen affects current sharing, voltage stress, and reliability.

Given Data / Assumptions:

• Each module is a series-type inverter (resonant commutation).
• Objective: increase output power at a fixed high frequency.
• Reasonable current sharing networks and synchronization are provided.

Concept / Approach:

Power scaling can be done by paralleling identical inverter modules so each shares a portion of the load current while maintaining the same output voltage. Putting series inverters “in series” raises voltage stress and is atypical for power scaling at high frequency. Therefore, multiple series-inverter modules are paralleled for higher current and power capability.

Step-by-Step Solution:

Verification / Alternative check:

Many RF and induction heating supplies parallel resonant inverter modules to meet higher current demands while keeping device voltage within limits.

Why Other Options Are Wrong:

• Series stacking increases voltage, not necessarily desired at HF.
• “Parallel inverters in parallel/series” does not reflect the base module being a series inverter; the naming in options is to test attention.

Common Pitfalls:

Equating “series inverter” with “series connection” of modules; the term describes commutation/LC placement, not how modules must be combined.

Final Answer:

a number of series inverters in parallel