| 摘要 |
PURPOSE:To supply a suitable power source to an on-board air conditioner in a state that the ratio of a generated voltage to a frequency is maintained constant by generating a control command from a system controller to generator control means and an inverter based on set information and temperature information. CONSTITUTION:Output voltage-frequency control instruction circuit 12 of output voltage-frequency control instruction means is provided in a system controller 4. Suitable voltage and frequency of a power source to be supplied to an AC motor-driven compressor 3 are calculated based on set information set by a control operation setter 5 and temperature information detected by a temperature sensor 6 by the circuit 12. For example, a frequency control command signal is generated to an inverter 9, and a voltage control command signal is generated to a field controller 11. Here, when the circuit 12 calculates supply power source characteristic to the compressor 3, V/F control is performed under the condition to vary the frequency so that the ratio of the voltage V to the frequency F becomes constant. |
