| 摘要 |
PURPOSE: To improve SN ratio at low cost by equipping this device with an output signal generating means which has an output winding to generate a specified output signal at the core inductively coupled with a conductor, and a cyclic reset means whose magnetic orientation is decided in advance, and making an output signal constitute a detection signal. CONSTITUTION: A means for generating an output signal is equipped with cores 120, 122, and 124 inductively coupled with conductors 110, 112, and 114 and output windings 130 and 132 wound on the cores 120, 122, and 124 so as to generate output signals. The output signals generated by the output windings 130, 132, and 134 are the functions of the DC currents of the conductors 110, 112, and 114 when the cores 120, 122, and 124 are not saturated, but not the functions of the DC currents of the conductors 110, 112, and 114 after a certain time. This device is provided with a means to cyclically reset the magnetic orientation of the cores 120, 122, and 124 into preset condition, and it constitutes a detection signal. Hereby, the control system is improved, and the electric efficiency improves. |
