| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technique for preventing overcurrent even when a conduction angle is suddenly reduced in sequentially switching the conduction patterns of switching elements of a rectifier in a rectification system for a three-phase AC generator using a 180°conduction method and a battery charging unit using the same. <P>SOLUTION: The rectification system 1 for a three-phase AC generator using the 180°conduction method changes a conduction phaseϕaccording to a load current or the like. A controller 13 determines whether switching elements (transistors) constituting a rectifier 12 are turned on in the sequence of T<SB>U</SB>, T<SB>Z</SB>, T<SB>V</SB>, T<SB>X</SB>, T<SB>W</SB>, T<SB>Y</SB>, T<SB>U</SB>, T<SB>Z</SB>, .... When the sequence of turning on the switching elements is upset, a switching element causing the upset of the conduction sequence is turned on to prevent the conduction sequence from being upset before the switching elements are turned on according to the change of the conduction phase angleϕ. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
