Motor current reconstruction method based on inverter side current sampling of extended state observer

• Main Authors: JIA PUFAN, XU JIAQUN
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2022
• 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

The invention discloses a motor current reconstruction method based on extended state observer inverter side current sampling, and belongs to the field of motor control. For a permanent magnet synchronous motor system with an LC filter, a current sensor is generally integrated and installed in a controller, and the current sensor is not easy to install in the LC filter, so that the current input into the motor is difficult to directly sample. Therefore, the invention provides a method for sampling the inverter side current and reconstructing and feeding back the motor side current through the extended state observer, which can be equivalent to directly sampling the motor side current. According to the reconstruction method, the operability of inverter side current sampling and the system performance of motor side current sampling are both considered, and the hardware cost of a control system is not additionally increased. 一种基于扩张状态观测器逆变器侧电流采样的电机电流重构方法属于电机控制领域。对于带有LC滤波器的永磁同步电机系统，由于通常电流传感器集成安装在控制器内部、LC滤波器内不易安装电流