| 摘要 |
PURPOSE:To simplify the control of an inverter by reading out unit data formed of ON or ON information of commutation elements stored in advance in a period relating to a frequency and controlling it, thereby obtaining a 3-phase AC near a sinusoidal wave. CONSTITUTION:A motor for an air conditioner is controlled by a 3-phase inverter, and controlled at the temperature. This inverter is controlled by turning ON or OFF commutation elements, the binary information of ON and OFF is used as unit data, the continuing time is used as the number of the unit data, and they are stored as data group for the prescribed phase for one cycle in a memory 7. A pulse signal P1 and a carry signal P2 are inputted to a CPU6 through a V/f converter 3 from the temperature sensor 1, the unit data group is read out from the memory 7 by this signal, thereby controlling ON or OFF the element. The reading period of the data group is controlled by the length of the period of the pulse signal P1, thereby controlling the output of the inverter. |
