| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an on-vehicle power conversion device that is cost effective with a simple structure and that reduces phase delay by transmission lapse time, without passing through complex processing procedures by a microcontroller, in a power conversion device that detects the voltage of the DC portion of a power converter and transmits the detected value to a control unit by electrically insulating it. <P>SOLUTION: A voltage detector 10 detects the voltage of the DC portion of the power converter 4 and transmits it to a delta-sigma modulator 45 through a DC portion voltage input interface 11. The delta-sigma modulator 45 performs the delta-sigma modulation of a DC portion voltage signal and transmits it to the control unit 5, by electrically insulating it via an insulation communications element 13. In the control unit 5, a demodulation means 46 demodulates the DC portion voltage value from the modulation signal so that it can be used for arithmetic calculation at a control calculation portion 24. <P>COPYRIGHT: (C)2008,JPO&INPIT |
