Power electronics is the engineering discipline focused on controlling the flow of electrical energy by converting current and voltage into a form suitable for a specific user load. Its strategic importance in modern technology is immense, as it underpins the efficient management of electrical power in systems ranging from consumer electronics to industrial manufacturing and utility grids. The core function of power electronics is to process and shape electrical energy with maximum precision and minimal waste, enabling the functionality and performance of countless modern systems.

The design of any power electronic system is guided by a set of key objectives. A system must not only perform its primary conversion function but also meet stringent performance and economic criteria. The most desirable power electronic system is one that aims to achieve:

• Maximum efficiency
• Maximum reliability
• Maximum availability
• Minimum cost
• Least weight
• Small size

The applications of power electronics are broadly categorized into two main types: ‘Static Applications’ and ‘Drive Applications’. Static applications involve the conversion of power for processes that do not involve electric motors, such as welding, heating, cooling, and electro-plating. In contrast, drive applications explicitly involve systems with rotating parts, such as motors in compressors, pumps, and air conditioning systems.

Achieving the aforementioned objectives across this diverse range of applications is fundamentally dependent on the switching speed, conduction losses, and power handling capabilities of the system’s core components: the power semiconductor devices.