| 摘要 |
PURPOSE:To increase output voltage from an inverter by coupling adjacent two unit vectors for obtaining an approximate rotating field vector by a preceding unit vector. CONSTITUTION:An ROM is mounted into a micro-computer 3 functioning as a control signal generating circuit for an inverter, and the ROM has first-fourth memories M1-M4. Vector configuration in a unit interval is written to the first memory M1, vectors used in first-sixth intervals are written to the second memory M2, data for specifying the ON time width of vectors are written to the third memory M3, and data representing positions where sections among vectors are buried are written to the fourth memory M4. These data are inputted to a CPU, adjacent two unit vectors are coupled mutually by a preceding unit vector, and a switch for the inverter is ON-OFF controlled by outputs from the two unit vectors. |
