| 摘要 |
PURPOSE:To set a displacement factor to be 1 and enlarge capacitance easily, by finding out the command value of DC voltage from a power source voltage value and the value of current fed to a loading device, through a specified arithmetic operation. CONSTITUTION:A power converter is organized with a self-excited converter CONV, a DC smoothing capacitor Cd, and a loading device LOAD, and the control circuit is organized with a reactive power arithmetic operation circuit VAR, a reactive power control compensation circuit HQ, a DC voltage control compensation circuit Gv, a phase control circuit PHC, an absolute value circuit ABS, a square arithmetic operation circuit SQ, and a square root arithmetic operation circuit SQR. Then, the command value Vd* of DC voltage is found out through the arithmetic operation of a formula from a power source voltage value Vsm and a load current value IL, and the converter CONV is controlled by using the command value. Then, without the pulse range modulation control of the converter CONV, power can be AC-DC-converted. |
