摘要
为了解决风机负载无传感器控制在低速运行时转子位置观测困难问题,结合风机负载的特点,将被控电机在旋转同步坐标系中的阻抗矩阵对称变形。对风机负载通用驱动电机,即无刷直流电机在两相静止坐标系中重构对称阻抗矩阵数学模型。根据该数学模型在电机运行时扩展反电势同时与电机转速和定子电流微分值都具有相关性的特性,设计基于饱和函数的滑模观测器实现了电机中低速运行时转子角度和速度信息的观测。结合风机负载特性、控制系统和转子位置观测器进行系统仿真,并基于STM32F302C8T6芯片制作硬件驱动控制板,实验测试后对结果进行分析,验证了控制系统的可行性。
To solve problem of difficulty of rotor position observation under the sensorless control of fan load at low speed,the impedance matrix of the controlled motor in the rotating synchronous coordinate system is deformed symmetrically according to the characteristics of fan load. The brushless DC motor is used to reconstruct the mathematical model in the two-phase static coordinate system. According to the back-EMF of the motor at low speed both correlate with the differential value of the motor speed and stator current differential value,the sliding mode observer based on saturation function is designed to realize the observation of rotor angle and velocity information at low speed. Combined with the fan load characteristics,control system and rotor position observer,the system simulation is carried out,and the hardware driver controller is made based on STM32 F302 C8 T6 chip. After experiment,the results are analyzed,and the feasibility of the control system is verified.
作者
郑富强
韩强
ZHENG Fuqiang;HAN Qiang(School of Mechanical Engineering,Donghua University,Shanghai 201620,China)
出处
《传感器与微系统》
CSCD
北大核心
2021年第2期102-104,共3页
Transducer and Microsystem Technologies
