MOTOR CONTROL DEVICE AND ELECTRIC VEHICLE SYSTEM

• Main Authors: MATSUI YAMATO, OBARA SHUNSUKE, SUZUKI HISANORI, MITSUI TOSHISADA
• Format: Patent
• Language: English; Japanese
• Published: 21.02.2024
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

To provide a motor control device capable of improving accuracy and reliability of magnetic flux estimation.SOLUTION: A motor control device has a voltage command preparation unit (41) generating a voltage command for controlling output voltage of a power conversion device according to a speed command or a torque command of a motor in which a rotor has a permanent magnet, a dead time compensation unit (42) performing a dead time compensation for the voltage command, and a magnetic flux estimation unit (50) estimating a magnetic flux of the permanent magnet. The magnetic flux estimation unit estimates the magnetic flux of the permanent magnet based on the voltage command, and a voltage drop occurring in the motor and the power conversion device, and between the motor and the power conversion device. The voltage drop includes a first voltage drop component due to resistance components, a second voltage drop component occurring due to the dead time compensation, and a third voltage drop component that is the voltage drop from which the first voltage drop component and the second voltage drop component are excluded.SELECTED DRAWING: Figure 1 【課題】磁束推定の精度および信頼性を向上できるモータ制御装置を提供する。【解決手段】本モータ制御装置は、回転子が永久磁石を有するモータの速度指令またはトルク指令に応じて、電力変換装置の出力電圧を制御するための電圧指令を生成する電圧指令作成部（４１）と、電圧指令に対してデッドタイム補償を行うデッドタイム補償部（４２）と、永久磁石の磁束を推定する磁束推定部（５０）と、を備え、磁束推定部は、電圧指令と、モータおよび電力変換装置、並びに、モータおよび電力変換装置間に生じる電圧降下と、に基づいて、永久磁石の磁束を推定し、電圧降下は、抵抗成分による第１の電圧降下成分と、デッドタイム補償によって生じる第２の電圧降下成分と、電圧降下から、第１の電圧降下成分および第２の電圧降下成分を除いた第３の電圧降下成分と、を含む。【選択図】図１