APPARATUS FOR MEASURING IRON LOSS OF MAGNETIC BODY

PURPOSE:To accurately calculate the iron loss of a magnetic body, by preliminarily calculating the absolute value and phase error generated in a measuring system and applying analogue/digital conversion to a measured value and performing correction calculation by the operation due to a personal computer. CONSTITUTION:The first and second windings 2, 3 are applied to a magnetic body 10 and AC voltage wherein the AC signal from a sine wave oscillator 5 is amplified by a power amplifier 6 is applied to said winding 2. A memory device 7 performs the sampling of the exciting voltage obtained by converting the current flowing through the winding 2 to voltage and the voltage induced in the winding 3 in a time sharing manner and converts sampling voltage to 2n by A-D conversion to store the same. The absolute error quantity and phase error quantity generated in a measuring apparatus system are preliminarily measured at every frequency by a control apparatus 8 performing operational processing and control. The phases of exciting voltage subjected to time sharing to be converted digital and secondary induced voltage are shifted by the error quantities and an absolute value is multiplied by a proportion constant to be corrected before electric energy is operated.