| 摘要 |
<P>PROBLEM TO BE SOLVED: To generate synchronization signals for respective phases, which are synchronized with three phases of an AC output from an AC generator respectively, and carry out advance/delay angle control without providing a magnet position detection equipment or a sub coil to either phase of a three-phase AC generator. <P>SOLUTION: A reference signal generation circuit 7 generates a stage switching timing signal Pst synchronized with an AC voltage from a pulsar coil 6, and whose phase is adjusted with one phase of the AC voltage from a three-phase AC generator 1 immediately after starting of an internal combustion engine. A three-phase synchronization square wave generation circuit 11 generates a U-phase synchronization signal Ru that is a rectangular wave signal synchronized with a U-phase, a V-phase synchronization signal Rv having a phase delay of 120° from the U-phase synchronization signal Ru, and a W-phase synchronization signal Rw having a phase delay of 120° from the V-phase synchronization signal Rv, so that those synchronization signals are synchronized with the stage switching timing signal Pst. <P>COPYRIGHT: (C)2012,JPO&INPIT |
