| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize an interleave type power factor improving circuit by commonly using a core for achieving inductive coupling between reactors and sensor coils among all chopper circuits and to allow each sensor coil to appropriately detect a point in time at which a current flowing to a reactor corresponding to the sensor coil becomes zero.SOLUTION: A reactor Lm and a sensor coil Tm are inductively coupled to each other by a first coupling coefficient, a reactor Ls and a sensor coil Ts are inductively coupled to each other by a second coupling coefficient, the reactors Lm and Ls are coupled to each other at strength that has the same polarity when viewed from a terminal 101 and is lower than magnitude of the first coupling coefficient and the second coupling coefficient, and the sensor coils Tm and Ts are coupled to each other at strength that has the same polarity when viewed from a terminal 106 and is lower than magnitude of the first coupling coefficient and the second coupling coefficient. |
