McMurray full-bridge inverter – device count In a classic McMurray full-bridge inverter implementation, how many thyristors and diodes are typically used in the main power circuit?

Introduction / Context:
McMurray family inverters employ forced commutation networks. The full-bridge version duplicates the half-bridge commutation legs, increasing the device count to realize bidirectional load voltage with reliable commutation.

Given Data / Assumptions:

• Classic McMurray full-bridge (not McMurray-Bedford variant).
• Symmetrical commutation in both legs.

Concept / Approach:

A half-bridge McMurray stage uses a commutation pair per leg. Converting to a full bridge doubles the number of controlled devices while adding clamp/feedback diodes for energy recovery. A typical arrangement ends up with eight thyristors and four diodes in the main bridge paths, with auxiliary commutation components (capacitors, inductors) not counted here as “diodes”.

Step-by-Step Solution:

Verification / Alternative check:

Reference topologies for McMurray full bridge show duplicated commutation legs yielding the cited device count.

Why Other Options Are Wrong:

• 4-device answers correspond to half-bridge or simpler bridges.
• 8 thyristors and 8 diodes overstates the diode count for the basic scheme.

Common Pitfalls:

Mixing McMurray and McMurray-Bedford counts or including auxiliary recovery diodes differently from main path diodes.

Final Answer:

8 thyristors and 4 diodes