| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-level type power conversion device to which a hysteresis comparator control system is applied appropriately.SOLUTION: A power conversion device 1 comprises a three-level type three-phase inverter part 10 and a control part 20. The three-level type three-phase inverter part includes: two switching elements SWand SW(also including SW, SW, SWand SWhereafter) that perform switching in a positive mode for generating a positive side of an output current; and two switching elements SWand SW(also including SW, SW, SWand SWhereafter) that perform switching in a negative mode for generating a negative side of the output current. The control part generates a control signal for controlling the output current within a hysteresis width with respect to a current command value, supplies the control signal to the elements SWand SWin the positive mode and supplies the control signal to the elements SWand SWin the negative mode. When the current command value crosses zero, the control part 20 performs switching mode changeover of the positive mode and the negative mode.SELECTED DRAWING: Figure 1 |
