Power converter control device with feedforward
AssigneeMitsubishi Electric Corporation
InventorsShuichi Nagato, Miwako Tanaka, Akihiko Iwata
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Abstract
A subtracting unit calculates a voltage deviation of an output voltage of a DC-to-DC converter from a target voltage. A feedback control variable calculator calculates a feedback control variable in each control cycle. In a control cycle in which a crossing of the output voltage and the target voltage is detected by a feedforward control determination unit, a feedforward control variable calculator calculates a feedforward control variable so that a change in the output voltage is prevented. A switching control signal generator generates a control signal for the DC-to-DC converter for controlling the output voltage, according to a summation of the feedforward control variable and the feedback control variable.
Claims8
A power converter control device for a power converter whose output changes according to a control signal, the power converter control device comprising:
- a feedback controller to calculate, in each control cycle, a first control variable based on a deviation in the output from a target output;
- a feedforward controller to calculate during a current control cycle, in response to a determination that a first deviation and a second deviation have different polarities such that the first deviation and the second deviation include a positive deviation and a negative deviation, a second control variable according to a difference between the first deviation and the second deviation so that a change in the output from the current control cycle to a subsequent control cycle is prevented, the first deviation being the deviation in the current control cycle, the second deviation being the deviation in the immediately preceding control cycle;
- and
- a control signal generator to generate the control signal in each control cycle, according to the first control variable and the second control variable.
Dependencies are inferred from the claim text.