POWER CONVERSION CONTROL DEVICE

• Main Author: ANDO YUYA
• Format: Patent
• Language: English; Japanese
• Published: 26.09.2019
• 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

To provide a power conversion control device capable of dealing with the sudden increase of current consumption even while increasing power conversion efficiency when the current consumption of an auxiliary machine component is within a normal range.SOLUTION: A CPU 22 selectively supplies power to an auxiliary machine component 16 by a first DC-DC converter 12 by setting the command value of an output voltage of the first DC-DC converter 12 higher than that of an output voltage of a second DC-DC converter when current consumption of the auxiliary machine component 16 is equal to or lower than a prescribed value. During this period, the CPU 22 turns a switching element on/off so as to control the output voltage of the second DC-DC converter equal to the command value. Thus, a current is supplied to the auxiliary machine component 16 by the second DC-DC converter 14 when the current consumption suddenly increases to lower the output voltage of the first DC-DC converter 12 below the command value.SELECTED DRAWING: Figure 1 【課題】補機部品の消費電流が常用範囲の場合に電力変換効率を高くしつつも、消費電流が急激に大きくなる場合であっても、これに対処することができるようにした電力変換制御装置を提供する。【解決手段】ＣＰＵ２２は、補機部品１６の消費電流が規定値以下の場合、第１ＤＣＤＣコンバータ１２の出力電圧の指令値を、第２ＤＣＤＣコンバータの出力電圧の指令値よりも高くすることによって、第１ＤＣＤＣコンバータ１２によって選択的に補機部品１６への電力供給をする。その間、ＣＰＵ２２は、第２ＤＣＤＣコンバータの出力電圧を指令値に制御すべく、スイッチング素子をオン・オフ操作する。これにより、消費電流が急増し第１ＤＣＤＣコンバータ１２の出力電圧が指令値に対して低下する場合、第２ＤＣＤＣコンバータ１４によって補機部品１６に電流が供給される。【選択図】図１