| 摘要 |
PURPOSE:To easily restarting an MG set after power recovery even if momentary power stoppage occurs in the input power source of the MG set in a power unit, which is composed of the MG set and an inverter for converting the output voltage into variable frequency power and supplying it to load. CONSTITUTION:The frequency command at the normal operation of an inverter is changed into small frequency command value, when momentary power stoppage occurs and the revolution of an MG set drops, or the inverter itself is stopped temporarily so as to lower the frequency of a load motor and lower the load torque of the driving motor of the MG set. |
