COMPARATIVE MEASUREMENT CIRCUIT AND METHOD OF THERMOELECTRIC TYPE AC/DC CONVERTER

摘要

PURPOSE:To stably perform precise comparative measurment without generating a heat shock by synthesizing a thermoelectric type AC/DC converter from parallel or series resistor groups in which a voltage dividing resistance value is incorporated in order to equalize the terminal voltages of first and second converters calculating the difference between each characteristics of difference for AC/DC. CONSTITUTION:The thermoelectromotive forces of the first and second converters TC1, TC2 selected from a plurality of converter groups are compared and the first converter TC1 having large thermoelectromotive force is connected to first terminals a1, a2 and the second converter TC2 having small thermoelectromotive force is connected to terminals b1, b2 and voltage division equalizing the terminal voltages of first and second resistors R1, R2 is synthesized by the first resistor R1 and parallel or series resistor groups r1, r2,..., rn to calculate the difference fetween characteristics of differences of the first and second converters TC1, TC2 for AC/DC.