| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress a limiter value from exceeding an output current when a load connected to a power convertor exceeds a nominal capacitance. <P>SOLUTION: A first voltage set value V<SB>1</SB>which is the target of the output voltage V<SB>0</SB>of an inverter 2 which supplies power to a load 7 as well as a current upper limit value I<SB>L</SB>as the limit of an output current I<SB>0</SB>are specified in advance. The output current I<SB>0</SB>and the output voltage V<SB>0</SB>of the inverter 2 are detected, and the impedance Z of the load is acquired from this. Based on the product of the impedance Z and the current upper limit value I<SB>L</SB>, a second voltage set value V<SB>2</SB>as the target of the output voltage of the inverter 2 is acquired. If the second voltage set value V<SB>2</SB>is equal to or higher than the first voltage set value V<SB>1</SB>, the output voltage V<SB>0</SB>of the inverter 2 is so controlled as to agree with the first voltage set value V<SB>1</SB>by proportional integration control. If the second voltage set value V<SB>2</SB>is less than the first voltage set value V<SB>1</SB>, the output voltage V<SB>0</SB>of the inverter 2 is so controlled as to agree with the second voltage set value V<SB>2</SB>by proportional integration control. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
