Switching power supply for generating a voltage in accordance with an instruction signal

摘要

A power supply includes a power converter 2 for generating an output voltage to be supplied to a load 3 from a power source 4, a filter 5 connected between power converter 2 and load 3, and a controller 10 for controlling the power converter 2, in which controller 10 applies a voltage instruction value vr applied as an input to circuitry which implements an operation element A defined as: <IMAGE> subtracts the output voltage from instruction voltage vr, and applies the difference to power converter 2.