PROBLEM TO BE SOLVED: To downsize capacity of a smoothing capacitor for suppressing current ripple flowing into a power storage device, and to downsize a power conversion unit.SOLUTION: A power conversion unit 100 includes: a main power conversion device 102 for converting a DC voltage of a power storage device into an AC voltage and driving a motor generator; a power conversion device 101 for an auxiliary machine, for transforming the DC voltage of the power storage device and charging an auxiliary machine battery; and a smoothing capacitor C100 connected in parallel to the input sides of the main power conversion device and the power conversion device for the auxiliary machine. The main power conversion device includes a current detection section for detecting a first input current to the main power conversion device, the power conversion device for the auxiliary machine includes a control circuit for controlling a second input current to the power conversion device for the auxiliary machine when transforming the DC voltage of the power storage device, and the control circuit performs ripple suppression control for controlling the second input current to a reverse phase against current ripple so as to offset the current ripple of the first input current detected by the current detection section.
【課題】蓄電装置に流れ込む電流リプルを抑制するための平滑コンデンサの容量を小型化することができ、電力変換ユニットの小型化を実現する。【解決手段】蓄電装置の直流電圧を交流電圧に変換してモータジェネレータを駆動する主電力変換装置102と、蓄電装置の直流電圧を変圧して補機バッテリを充電する補機用電力変換装置101と、主電力変換装置および補機用電力変換装置の入力側に並列接続された平滑コンデンサC100と、を備え、車両に搭載される電力変換ユニット100であって、主電力変換装置は、主電力変換装置への第1の入力電流を検出する電流検出部を有し、補機用電力変換装置は、蓄電装置の直流電圧を変圧する際に、補機用電力変換装置への第2の入力電流を制御する制御回路を有し、制御回路は、電流検出部が検出した第1の入力電流の電流リプルを相殺するように、第2の入力電流を電流リプルと逆相に制御するリプル抑制制御を行う。【選択図】図1
POWER CONVERSION UNIT AND RIPPLE SUPPRESSION CONTROL METHOD IN POWER CONVERSION
電力変換ユニットおよび電力変換時のリプル抑制制御方法
2015-11-24
Patent
Elektronische Ressource
Japanisch
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 / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |