POWER CONVERSION DEVICE, POWER CONVERSION METHOD, AND PROGRAM

• Main Authors: YAMAZAKI AKIRA, INOMATA KENTARO
• Format: Patent
• Language: English; Japanese
• Published: 09.02.2022
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

To provide a power conversion device effective for improving accuracy in driving force control of an electric motor.SOLUTION: A power conversion device 1 comprises: a magnet magnetic flux estimation unit 132 which estimates a magnet magnetic flux of a motor 20 on the basis of a d-axis magnetic flux caused in the motor 20, a d-axis inductance of the motor 20, and a d-axis current flowing through the motor 20; a q-axis inductance estimation unit 133 which estimates a q-axis inductance of the motor 20 on the basis of a q-axis magnetic flux generated in the motor 20 and a q-axis current flowing through the motor 20; a driving force estimation unit 123 which estimates a driving force of the motor 20 on the basis of estimation results by the magnet magnetic flux estimation unit 132 and estimation results by the q-axis inductance estimation unit 133; and a driving force correction unit 124 which corrects a current command so that estimation results by the driving force estimation unit 123 follow a driving force command.SELECTED DRAWING: Figure 2 【課題】電動機の駆動力制御の精度向上に有効な電力変換装置を提供する。【解決手段】電力変換装置１は、モータ２０に生じるｄ軸磁束と、モータ２０のｄ軸インダクタンスと、モータ２０に流れるｄ軸電流とに基づいてモータ２０の磁石磁束を推定する磁石磁束推定部１３２と、モータ２０に生じるｑ軸磁束と、モータ２０に流れるｑ軸電流とに基づいてモータ２０のｑ軸インダクタンスを推定するｑ軸インダクタンス推定部１３３と、磁石磁束推定部１３２による推定結果と、ｑ軸インダクタンス推定部１３３による推定結果とに基づいてモータ２０の駆動力を推定する駆動力推定部１２３と、駆動力推定部１２３による推定結果を駆動力指令に追従させるように電流指令を補正する駆動力補償部１２４と、を備える。【選択図】図２