| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conversion system capable of achieving a phase shift for suppressing insertion of an auxiliary carrier into one signal and generation of switching loss more than the conventional one because, when a shift phase for suppressing the generation of loss by jointing on periods of PWM signals PWM1, PWM2, the phase shift is performed by inserting an auxiliary carrier into one signal and at this time the switching loss is caused at a PWM signal by insertion of an auxiliary carrier.SOLUTION: When shifting at least one phase of a first and a second PWM signals PWM1, PWM2 to joint duty on periods of both, a CNV controller 13 boosts up one PWM signal PWM2 before the other PWM signal PWM1 boosts down and performs an overlapped phase shift for overlapping a part of the duty on periods of the first and the second PWM signals PWM1, PWM2.SELECTED DRAWING: Figure 10 |
