New Control Technique in dc/dc Regulators for Space Applications

A new type of control loop is presented for dc/dc regulators, based on the use of a linear analog to pulsewidth modulator. This function, which is independent of operating frequency, permits high sampling frequencies. Combined with a limiter of the analog input, limitation characteristics are automatically available, without any extra sensing on the hot line. The independence of parameters f0 and t1 is demonstrated, and application of the loop to control the regulator output characteristics is shown. This flexibility finds useful applications in high-power systems (1 kW) by permitting parallel unit operations and utilization of modular units.