A high-density modular power processor for distributed military power systems

A high-density power processor in a SEM (standard electronic module) Format-E package is described. The power converter features a full-bridge PWM (pulse-width modulated) topology that uses transition resonance to achieve zero-voltage switching. The switching sequence of the phase-shifted topology simplifies the MOSFET drive circuitry. The converter's tolerance to low magnetizing inductance reduces the volume required for the power transformer. A low-bandwidth control loop regulates the output currents of parallel units, providing excellent DC load-sharing characteristics while allowing each unit to respond to dynamic loads with its own high-bandwidth loop. The parallel modules are self-synchronizing in frequency and can be synchronized to an external clock. A high-density packaging approach is used. >