| 摘要 |
PURPOSE:To measure the iron loss or eddy current loss of a sample to be measured by using the difference between the output voltage when the sample is not installed near an electricity conduction circuit and the output voltage when the sample is installed near the same and the secondary current of the other current transformer of two units of current converters. CONSTITUTION:An electricity conduction circuit inserted with a mutual reactor 4 and two units of current transformers 5, 6 is provided and a search coil 3 which generates the magnetic flux to be generated when AC current is conducted to said circuit is installed. The 1st variable resistor 7 and the 2nd variable resistor 9 are connected to the search coil. Current I is conducted to the electricity conduction circuit from an electricity conduction transformer 2 and the resistors 7, 9 are so regulated that the input voltage V inputted from a measuring circuit to a power meter 10 is made zero. The output of the power meter 10 is made zero. A sample 12 to be measured is installed in the prescribed position near a voltage lead wire 3 in this state and the eddy current loss (or iron loss) of the sample 12 is measured from the output of the power meter 10. |
