PROBLEM TO BE SOLVED: To suppress decline in efficiency while suppressing ripples.SOLUTION: A duty controller 140 adjusts a duty command value S3 so that a DC link voltage Vgenerated in a DC bus 104 becomes near to a target voltage Vr. A pulse width modulator 142 adjusts a duty ratio of a pulse signal S4 according to the duty command value S3. A frequency controller 144 estimates an inductance L on the basis of a DC superposition property and a detected current Ic, and as the inductance L becomes smaller, makes a carrier frequency fc of the pulse width modulator 142 higher, and adjusts a loop gain of the duty controller 140 so as to cancel a change in the inductance L.

    【課題】効率の低下を抑制しつつ、リップルを抑制する。【解決手段】デューティコントローラ140は、DCバス104に生ずるDCリンク電圧VDCが所定の目標電圧Vrに近づくように、デューティ指令値S3を調節する。パルス幅変調器142は、パルス信号S4のデューティ比をデューティ指令値S3に応じて調節する。周波数コントローラ144は、インダクタL1の直流重畳特性と検出された電流IcにもとづきインダクタンスLを推定し、インダクタンスLが小さくなるにしたがい、パルス幅変調器142のキャリア周波数fcを高くし、(iii)インダクタンスLの変化を相殺するようにデューティコントローラ140のループゲインを調節する。【選択図】図6


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    Title :

    POWER SUPPLY DEVICE FOR INDUSTRIAL VEHICLE


    Additional title:

    産業車両用電源装置


    Contributors:

    Publication date :

    2015-11-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / E02F Baggern , DREDGING



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