VOLTAGE VARIATION CONTROLLER AND VOLTAGE VARIATION CONTROL METHOD

PROBLEM TO BE SOLVED: To provide a voltage variation controller capable of suppressing the development of degradation in a capacitor due to charge and discharge exceeding threshold electric power of the capacitor.SOLUTION: A voltage variation controller in a vehicle including: a capacitor; a converter converting a DC voltage output from the capacitor to a DC voltage at a different level; and a load including a motor driven by electric power supplied from the capacitor via the converter, comprises: a target-power deriving unit deriving target power to be output from the motor in response to driving power required for the vehicle; an electric-power-consumption deriving unit deriving electric power consumption of the motor in response to the target power; and a load-side-voltage-target-value setting unit setting a target value of a load-side voltage of the converter in response to the electric power consumption of the motor derived by the electric-power-consumption deriving unit. The load-side-voltage-target-value setting unit suppresses a change rate of the target value of the load-side voltage in response to a state of the capacitor or threshold electric power of the capacitor preset for the state. 【課題】蓄電器の限界電力を超えた充放電による蓄電器の劣化の進行を抑制可能な電圧変動制御装置を提供すること。【解決手段】蓄電器と、蓄電器が出力する直流電圧を異なるレベルの直流電圧に変換するコンバータと、コンバータを介した蓄電器からの電力供給によって駆動する電動機を含む負荷と、を備えた車両における電圧変動制御装置は、車両に対する要求駆動力に応じて電動機が出力する目標動力を導出する目標動力導出部と、目標動力に応じた電動機の消費電力を導出する消費電力導出部と、消費電力導出部が導出した電動機の消費電力に応じたコンバータの負荷側電圧の目標値を設定する負荷側電圧目標値設定部と、を備える。負荷側電圧目標値設定部は、負荷側電圧の目標値の変化率を、蓄電器の状態又は当該状態に対して予め設定された蓄電器の限界電力に応じて抑制する。【選択図】図４