POWER SUPPLY

To provide a power supply capable of stably controlling an output current.SOLUTION: The power supply according to an embodiment supplies an output current to an electromagnet in accordance with a reference current signal which transits between a first signal value and a second signal value. The power supply comprises: a first power converter configured to output a first voltage during a first time period which is a transition period of the output current and to output a second voltage during a time period other than the first time period; a second power converter connected to the first power converter in series at an output; and a control device configured to control the output current. The control device comprises: a control amount generating means configured to generate and output a control amount according to a deflection between the reference current signal and the output current signal indicating the output current; and a control amount limiting means configured to limit the output of the control amount generating means to be within a predetermined limit value. The control amount generating means outputs the control amount smaller than the limit value during the first time period.SELECTED DRAWING: Figure 1 【課題】出力電流を安定して制御することができる電源装置を提供する。【解決手段】実施形態に係る電源装置は、第１信号値と第２信号値との間を遷移する基準電流信号に応じて出力電流を電磁石に供給する。この電源装置は、出力電流の遷移期間である第１期間に第１電圧を出力し、前記第１期間以外の期間では第２電圧を出力する第１電力変換器と、出力で前記第１電力変換器に直列に接続された第２電力変換器と、前記出力電流を制御する制御装置と、を備える。前記制御装置は、前記基準電流信号と前記出力電流を表す出力電流信号との偏差に応じた制御量を生成して出力する制御量生成手段と、前記制御量生成手段の出力を、あらかじめ設定された制限値以内に制限する制御量制限手段と、を含む。前記制御量生成手段は、前記第１期間に前記制限値よりも小さい制御量を出力する。【選択図】図１