| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of components and improve the distortion factor of an AC signal in the case of a multiplex inverter and reduce the number of pulses of a PWM signal in the case of a PWM-type inverter by a method wherein the respective output signals of individual inverters are inputted to the primary sides of individual transformers and the secondary sides of the individual transformers are connected in cascade for multiplexing. SOLUTION: Control signals by which signals corresponding to respective orthogonal functions which convert sine waves and cosine waves with conversion factors which are not zero are outputted from respective inverters 102-104 are generated by a control signal generator 105. The respective inverters 102-104 are controlled by the control signals. The transformation ratios (primary side : secondary side) of respective transformers 106-108 which produce an AC voltage with a small distortion factor by synthesizing the output signals of the respective inverters 106-108 are (primay side: secondary side = 1 : conversion factor). The output signals of the respective inverters 102-104 are inputted to the primary sides of the respective transformers 106-108 and the secondary sides of the respective transformers 106-108 are connected in cascade for multiplexing to obtain AC signal with a small distortion factor. |
