EVALUATION DEVICE AND EVALUATION METHOD FOR INVERTER CIRCUIT FOR ELECTRIC MOTOR

• Main Authors: TAKAKURA SHINJI, YASUNAKA SHIGEN
• Format: Patent
• Language: English; Japanese
• Published: 07.02.2019
• 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 device and method for evaluating an inverter circuit for an electric motor.SOLUTION: An evaluation device 30 for an inverter circuit for an electric motor includes a three-phase/two-phase converter 43, a current control system 33, a gate signal generator 35, and a diagnosis part 36. The three-phase/two-phase converter 43 converts a primary side three-phase current i,i,1of an electric moto 10 connected to an inverter circuit 20 into a d-axis current i, and a q-axis current i. The current control system 33 generates command values v, vof d-axis and q-axis voltages for defining the q-axis current ias the command value inear zero and the d-axis current ias a prescribed command value iby feedback control. The gate signal generator 35 generates a gate signal gs based on the command values v, vto apply the command values to the inverter circuit 20. The diagnosis part 36 stores the command value v.SELECTED DRAWING: Figure 1 【課題】電動機用インバータ回路を評価する装置及び方法を提供する。【解決手段】電動機用インバータ回路の評価装置３０は、３相−２相変換器４３、電流制御系３３、ゲート信号生成器３５、および診断部３６を有する。３相−２相変換器４３は、インバータ回路２０に接続された電動機１０の一次側３相電流ｉ１ｕ，ｉ１ｖ，１１ｗをｄ軸電流ｉ１ｄ，ｑ軸電流ｉ１ｑに変換する。電流制御系３３は、フィードバック制御によって、前記ｑ軸電流ｉ１ｑをゼロ近傍の指令値ｉ１ｑ＊とし、前記ｄ軸電流ｉ１ｄを所定の指令値ｉ１ｄ＊とするｄ軸およびｑ軸電圧の指令値ｖ１ｄ＊、ｖ１ｑ＊を生成する。ゲート信号生成器３５は、前記指令値ｖ１ｄ＊、ｖ１ｑ＊に基づくゲート信号ｇｓを生成してインバータ回路２０に印加する。診断部３６は、前記指令値ｖ１ｄ＊を記憶する。【選択図】図１