In recent years, attention is being given to 42V power supply technology for solving the problem of increased power demand in vehicles. Since 2001, Toyota Motor Corporation has been marketing a mild hybrid system (THS-M) in order to further improve fuel economy and reduce emissions; this system requires both 42V and 14V power sources.The THS-M system consists of a 42V motor generator (M/G) connected to the engine crankshaft with a belt; an inverter; a 36V battery; a DC/DC converter for stepping down the 42V power supply to a conventional 12V battery; and high-power related electrical components. These components require additional costs, which must be reduced in order to increase the sales volume of THS-M vehicles.We have devised a method to eliminate the conventional DC/DC converter from the THS-M, and as a result we have developed a new, revolutionary power conversion system (multi-function inverter). Instead of using a DC/DC converter, we derived a 14V power line from the neutral point of the motor generator, and added a reactor (a type of smoothing inductor) in this line for reducing ripple.In addition, we applied a new inverter switching system which allows us to simultaneously and independently control both the 14V and 42V system voltages, which are taken from the motor-generator drive, and connected to the 12V and 36V batteries, respectively.The paper reports on the principle of operation and the test results, including torque and efficiency characteristics of the multi-function inverter.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Novel Power Conversion System for Cost Reduction in Vehicles with 42V/14V Power Supply


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2003 World Congress & Exhibition ; 2003



    Publication date :

    2003-03-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Novel power conversion system for cost reduction in vehicles with 42V/14V power supply

    Kusaka,Y. / Tsuji,K. / Toyota Motor,JP | Automotive engineering | 2003


    2003-01-0307 Novel Power Conversion System for Cost Reduction in Vehicles with 42V/14V Power Supply

    Kusaka, Y. / Tsuji, K. / Society of Automotive Engineers | British Library Conference Proceedings | 2003


    Power conversion system for vehicles

    HA TAE JONG / YEO IN YONG / LEE DAE WOO et al. | European Patent Office | 2021

    Free access

    HIGH-VOLTAGE POWER SUPPLY CONVERSION SYSTEM AND METHOD FOR URBAN RAIL VEHICLES

    CAO ZENGMING / CHEN YONG / ZHOU LI et al. | European Patent Office | 2021

    Free access