The selection of suitable semiconductor devices, correct choice of converter topologies—a generic method of power conversion and synthesis, along with robust control strategies are a priory condition for the trio to form a matching package to meet the stringent demand of magnet physics. Without this trinity working in synchronism, the purpose of accelerator control will be defeated. The earlier practice of selecting Hg–arc rectifiers contributed substantial losses during switching and conducting in converters to bring down the efficiency and performance of the synchrotron operation. The design of distribution cell structure based on the White circuit principle for magnet excitation also demands strict adherence to the supply requirements for efficient functioning of synchrotrons. It is therefore essential to upgrade converter topologies and adopt advanced control system strategies for controlling parameter tolerances to produce more protons per pulse and at the same time improve accelerator operation. Due to fast availability of semiconductor devices in various forms with different power ratings and circuit configurations, it is now possible to implement latest technology in the design of power supplies and control systems in present-day synchrotrons.