| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology capable of performing a fault diagnosis of a current sensor without being limited under a specific condition that current detected by the current sensor is within a predetermined range. <P>SOLUTION: In a fault diagnosis device 40 of a current sensor 20 for outputting a detection signal i<SB POS="POST">b</SB>corresponding to a change in a magnetic flux received by an exciting coil 22 by causing excitation current i<SB POS="POST">e</SB>to flow to a magnetic material core 21 with the exciting coil 22 wound therearound including a fault detection coil 41 wound around the magnetic material core 21 apart from the exciting coil 22, and a control part 42, the control part 42 is configured to execute induced voltage detection processing for detecting induced voltage v<SB POS="POST">i</SB>occurring in the fault detection coil 41, and fault determination processing for determining that the current sensor 20 has a fault on the basis of the induced voltage v<SB POS="POST">i</SB>detected by the induced voltage detection processing. <P>COPYRIGHT: (C)2013,JPO&INPIT |
