Patent attributes
A magnetic bridge power sensor including a magnetic bridge having plural magnetic circuits, an excitation coil to generate a magnetic flux in one of the magnetic circuits, and a magnetic flux detection coil to detect the magnetic flux in one of the magnetic circuits. A current, which is obtained by subjecting a current proportional to a voltage on a measurement target power line to at least one of an intermittent processing and an inverting processing, is carried to the excitation coil. The current of the measurement target power line is carried to a detection target current conductor. An output of the detection coil is synchronously detected by a signal having a phase synchronized with a cycle of the intermittent processing or the inverting processing at a frequency twice as high as a frequency of the intermittent processing or the inverting processing.
