| 摘要 |
<P>PROBLEM TO BE SOLVED: To smoothly shift into stationary control after convergence of system disturbance by to suppressing the outflow of higher harmonics in stationary state and can prevent the stoppage of an inverter by protection of equipment by suppressing an eddy current at system disturbance. <P>SOLUTION: A switch 22 selects a generation signal for a gate pulse signal from a triangular wave comparison system controller 14 in stationary state, and selects a generation signal for a gate pulse signal from a hysteresis comparator system controller 18 at sudden change of the output current of an inverter, and outputs a generation command signal for a gate pulse signal. Moreover, a hysterisys width variable part 34 changes the hysterisys width Δi* of the hysterisys comparator system controller 18 when the output current i of the inverter has deviated intermittently from the hysterisys width after convergence of system disturbance. <P>COPYRIGHT: (C)2008,JPO&INPIT |
