Application of a single-phase series converter (power electronics): What is the principal use case?

Introduction / Context:
In converter engineering, series and parallel configurations scale voltage and current capability respectively. Understanding which configuration serves which goal is essential for topology selection and insulation design.

Given Data / Assumptions:

• “Series converter” indicates series connection of converter units/devices.
• Series connections raise overall blocking voltage capability.
• No special current-sharing components are implied in the statement.

Concept / Approach:

Series connection primarily increases voltage withstand and output voltage capability. Conversely, parallel connections are used to raise current capability. Therefore, the primary application of a single-phase series converter is high-voltage output service.

Step-by-Step Solution:

Verification / Alternative check:

Design guides commonly employ series stacks for HV DC supplies (e.g., test sets, electrostatic precipitators) and parallel units for high current supplies (e.g., plating, drives).

Why Other Options Are Wrong:

• High current: a parallel converter role.
• High voltage and high current: would need both series and parallel arrangements with complex sharing.
• “Improving efficiency” is not the defining characteristic of series connection.

Common Pitfalls:

Assuming series also increases current—without parallelism and sharing networks it does not.

Final Answer:

high voltage output