| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the measurement accuracy of a current measuring apparatus utilizing coreless current sensors, and to reduce a size and a weight of the current measuring apparatus. <P>SOLUTION: The current measuring apparatus 10 measures currents flowing from a power supply 1 to a motor 4 through conductors 5U, 5V, 5W. The coreless current sensors 11A, 11B are disposed between the conductors 5U, 5V, 5W. Coefficients for representing relationships between the currents flowing through the conductors 5U, 5V, 5W and output voltages from the coreless current sensors 11A, 11B are actually measured and previously obtained. A signal processor 12 calculates the currents flowing through the conductors 5U, 5V, 5W, based on output signals from the coreless current sensors 11A, 11B and the previously-obtained coefficients by utilizing a fact that the sum of the currents flowing through the conductors 5U, 5V, 5W is zero. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
