| 摘要 |
PROBLEM TO BE SOLVED: To estimate the resistance value of secondary resistor accurately, in the case of performing the vector control for an inductor, using the resistance value of the secondary resistor. SOLUTION: The quantity of heat conduction between the secondary side and the primary side is obtained by multiplying the difference between secondary temperature Tr and primary temperature Ts by a heat conduction conversion factor a, and based on this quantity of heat conduction and a secondary loss Pr, the secondary temperature Tr is obtained. Based on the this secondary temperature Tr, the resistance value of the secondary resistor is obtained by a secondary resistance value operating part 26, and based on the resistance value of the secondary resistor, the secondary loss Pr is obtained by a secondary loss operating part 18. This way, the resistance value of the secondary resistor can be obtained accurately by taking the quantity of heat conduction between the primary side and the secondary side into consideration. |
