| 摘要 |
PURPOSE:To provide the title system intended to prevent the synchronism discrepancy just before shutdown, designed to maintaining the direct current voltage at its circuit with an auxiliary electric source and provide a changeover means for switching to said auxiliary electric source. CONSTITUTION:On power failure or electric source disconnection, a motor 4 and load reduction are controlled by an inverter 3 to return restored energy to a direct current voltage circuit, thus continuing operation. When the direct current voltage is lowered below a specified level, a voltage-detecting means 7 actuates a changeover means 6 to effect switching the direct current voltage circuit from the electric source 1 side to auxiliary electric source 5 side, thus preventing the inertial revolution. |
