ELECTRICAL POWER SYSTEM

• Main Author: SONE TOSHIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 23.05.2019
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

To provide an electric power supply which can efficiently restrain an inrush current after starting a voltage transducer and is easily realized.SOLUTION: An electrical power system S comprises a first power supply, a second power supply, VCU outputting a boosted voltage from the input port to the output terminal, and ECU controlling the VCU. The VCU comprises an upper arm, a lower arm, a reactor of which one terminal is connected with the input port and of which the other terminal is connected with a connection midpoint between the upper arm and the lower arm, and a current sensor which acquires a value of a current through the reactor. When starting the VCU, the ECU performs starting control which gradually increases a duty factor γ1 of a transistor of the lower arm with a transistor of the upper arm being OFF, and then performs normal control which complementarily drives the transistor of the upper arm and the transistor of the lower arm. The ECU determines whether to finish or continue the starting control using the reactor current value acquired by the current sensor during performing the starting control.SELECTED DRAWING: Figure 2 【課題】電圧変換器における起動後の突入電流を効果的に抑制することができ、実現が容易な電源装置を提供すること。【解決手段】電源システムＳは、第１電源と、第２電源と、入力端から出力端へ電圧を昇圧して出力するＶＣＵと、ＶＣＵを制御するＥＣＵと、を備える。ＶＣＵは、上アームと、下アームと、一端が入力端に接続され他端が上アームと下アームとの接続中点に接続されたリアクトルと、リアクトルに流れる電流の値を取得する電流センサと、を備える。ＥＣＵは、ＶＣＵの起動時には、上アームのトランジスタをオフにした状態で下アームのトランジスタのデューティ比γ１を漸増させる起動時制御を行った後、上アームのトランジスタ及び下アームのトランジスタを相補的に駆動する通常制御を行う。ＥＣＵは、起動時制御の実行中には、電流センサによって取得されたリアクトル電流の値を用いて起動時制御を終了するか継続するかを判定する。【選択図】図２