POWER CONVERSION DEVICE

• Main Authors: OGURA MASATSUGU, MINOWA YOSHIBUMI
• Format: Patent
• Language: English; Japanese
• Published: 18.08.2016
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a three-level type power conversion device to which a hysteresis comparator control system is applied appropriately.SOLUTION: A power conversion device 1 comprises a three-level type three-phase inverter part 10 and a control part 20. The three-level type three-phase inverter part includes: two switching elements SWand SW(also including SW, SW, SWand SWhereafter) that perform switching in a positive mode for generating a positive side of an output current; and two switching elements SWand SW(also including SW, SW, SWand SWhereafter) that perform switching in a negative mode for generating a negative side of the output current. The control part generates a control signal for controlling the output current within a hysteresis width with respect to a current command value, supplies the control signal to the elements SWand SWin the positive mode and supplies the control signal to the elements SWand SWin the negative mode. When the current command value crosses zero, the control part 20 performs switching mode changeover of the positive mode and the negative mode.SELECTED DRAWING: Figure 1 【課題】ヒステリシスコンパレータ制御方式を好適に適用した３レベル型の電力変換装置を提供する。【解決手段】電力変換装置１は、出力電流の正側を生成する正モードにおいてスイッチングを行う２つのスイッチング素子ＳＷＵ１,ＳＷＵ３（以下、ＳＷＶ１,ＳＷＶ３、ＳＷＷ１,ＳＷＷ３も含む。）と、出力電流の負側を生成する負モードにおいてスイッチングを行う２つのスイッチング素子ＳＷＵ２,ＳＷＵ４（以下、ＳＷＶ２,ＳＷＶ４、ＳＷＷ２,ＳＷＷ４も含む。）とを有する３レベル型の３相インバータ部１０と、出力電流を電流指令値に対してヒステリシス幅以内に制御する制御信号を生成して、正モードでは制御信号を素子ＳＷＵ１,ＳＷＵ３に供給し、負モードでは制御信号を素子ＳＷＵ２,ＳＷＵ４に供給する制御部２０とを備え、制御部２０は、電流指令値がゼロクロスするときに、正モードと負モードとのスイッチングモード切換を行う。【選択図】図１