Patent ID: 8598858

Claim:
A predictive control system for a power converter circuit that transfers an input side power to an output side power by switching a switch to on-status or off-status, the predictive control system comprising: a sampling part that detects one or more of (a), (b), (c), (d) as two measurements in one cycle: (a) a current that flows through the switch of the power converter circuit, (b) a current that flows through an element except for the switch, (c) a terminal voltage that occurs between terminals of the switch, and (d) a terminal voltage that occurs between terminals of the element except for the switch; and a control part that compares and judges whether a first sampling measurement value exceeds a prescribed threshold value, and predicts a first sampling prediction value at a next sampling time, when the sampling measurement value does not exceed the prescribed threshold value, wherein when the first sampling prediction value does not exceed the prescribed threshold value, the status of the switch is maintained, wherein when the first sampling prediction value exceeds the prescribed threshold value, the status of the switch is changed, wherein the power converter circuit is a DC/DC converter, and the first sampling measurement value is an actual measurement value of current that flows in the switch, and wherein the control part at least calculates the first sampling prediction value by a collinear approximation or a curve approximation based on two previous sampling measurement values.