| Title |
A Multi-Stair Case Wave PWM Inverter by Complementary Transistor |
| Authors |
정연택 ; 이종수 ; 이달해 ; 배상준 ; 백종현 ; 배영호 |
| Abstract |
The PWM inverter investigated in this paper utilizes a bridge type current sharing reactor circuit with tow pairs of complementary transistor at each phase. The driving signals for this inverter are 3 level PWM waves of W type an M type modulation, which are obtained from a microprocessor based on the switching time data obtained by switching position calculation of triangular and sine modulation wave. The output voltage waveforms of this inverter have 5 level phase voltage and 9 level line voltage of PWM. The harmonics of the output voltage are reduced to half when it is compared with single CTI, and the occurrence of harmonics is also reduced. |