DEVICE AND METHOD FOR STATE DETERMINATION

• Main Authors: KAWANAKA SHOTA, TAMURA SHO
• Format: Patent
• Language: English; Japanese
• Published: 29.06.2017
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

PROBLEM TO BE SOLVED: To detect a failure of a switch element which switches the capacitance of a flying capacitor.SOLUTION: A power monitoring device includes: a first capacitor which is connected to an insulated power supply; and a second capacitor which is connected to the power supply and also connected to the first capacitor through a changeover switch. The power monitoring device controls the changeover switch to acquire a first voltage value obtained by charging using a first charging route which includes the first capacitor without including the second capacitor. The power monitoring device controls the changeover switch to acquire a second voltage value obtained by charging using a second charging route which includes the second capacitor and the first capacitor. On the basis of the first and second voltage values, the power monitoring device determines the state of the changeover switch.SELECTED DRAWING: Figure 2 【課題】フライングキャパシタの容量を切り替えるスイッチ素子の故障を検出することを課題とする。【解決手段】電源監視装置は、絶縁された電源に接続される第１キャパシタと、電源に接続されるとともに第１キャパシタに切替スイッチを介して接続される第２キャパシタとを有する。電源監視装置は、切替スイッチを制御して、第２キャパシタを含まずに第１キャパシタを含む第１充電経路を用いて充電された第１電圧値を取得する。電源監視装置は、切替スイッチを制御して、第２キャパシタと第１キャパシタを含む第２充電経路を用いて充電された第２電圧値を取得する。電源監視装置は、第１電圧値と第２電圧値とに基づいて、切替スイッチの状態を判定する。【選択図】図２