Modified McMurray full-bridge inverter – device count A modified McMurray full-bridge inverter employs which combination of main thyristors and diodes?

Introduction / Context:
McMurray and modified McMurray inverters are classic forced-commutated topologies using commutation capacitors and auxiliary devices. The “modified” versions add energy recovery paths and additional diodes to improve efficiency and device stress handling.

Given Data / Assumptions:

• Full-bridge single-phase inverter framework.
• Forced commutation via commutation capacitors and auxiliaries.
• Energy recovery diodes present in modified topology.

Concept / Approach:

The original McMurray full-bridge commonly totals 8 thyristors and 4 feedback diodes (one antiparallel diode per main leg). The modified McMurray extends the commutation and recovery network, introducing additional diodes to route commutation energy back to the source or capacitors, bringing the count to 8 thyristors and 8 diodes.

Step-by-Step Solution:

Verification / Alternative check:

Typical device-count tables in power electronics references list higher diode counts for “modified” topologies due to energy recovery additions, versus the original McMurray–Bedford implementations.

Why Other Options Are Wrong:

• Lower diode counts align with simpler or non-modified versions.

Common Pitfalls:

Confusing McMurray, McMurray–Bedford, and modified variants; each has distinct commutation and recovery networks affecting device counts.

Final Answer:

8 thyristors and 8 diodes