摘要
针对永磁同步电机在单电阻电流采样时,低调制区域和扇区边界区域难以进行电流重构的问题,提出了一种新型单电阻电流重构技术。首先,对三相电流重构技术原理进行研究,定义无法重构的区域为非观测区,对非观测区电流重构盲区进行分析。其次,使用脉冲宽度调制移相法对非观测区的电流进行重构,发现仍有部分非观测区只可测得一相电流,从而无法完成电流重构。针对这一问题,设计电流观测器,通过单相电流来估算三相电流,且不需要电机与负载参数,实现简单。试验验证表明,所提新型单电阻电流重构技术具有可行性和实用价值。
In order to solve the problem that it was difficult for permanent magnet synchronous motor to reconstruct the current in the low modulation area and the boundary area of the sector when the single-resistance current was sampled,a novel single- resistance current reconstruction technique was proposed. Firstly,the principle of three-phase current reconstruction technique was studied,the region in which the current was unable to reconstruct was defined as non-observation area,and the blind region of current reconstruction in the non-observation area was analyzed.Secondly,using the pulse width modulation (PWM) shift method to reconstruct the current in the non- observation area,it was found that there were still some non- observation areas where only the single-phase current could be measured and the current could not be reconstructed.Aiming at this problem,the current observer without the motor and load parameters was designed to estimate the three-phase current, which was easy to implement.Finally,the experimental results showed that the proposed novel single-resistor current reconstruction technique was feasible and valuable.
作者
陆佳琪
吴金富
陆彦如
张懿
魏海峰
LU Jiaqi;WU Jinfu;LU Yanru;ZHANG Yi;WEI Haifeng(School of Electronics and Information,Jiangsu University of Science and Technology,Zhenjiang 212000,China;Zhejiang Dongfang Electromechanical Co.,Ltd.,Yueqing 325600,China)
出处
《电机与控制应用》
2019年第2期46-51,共6页
Electric machines & control application
基金
国家自然科学基金项目(61503161)
江苏省产学研前瞻性联合研究项目(BY2016073-01)
江苏省自然科学基金面上项目(BK20161229)
江苏省高校自然科学研究面上项目(16KJB510046)
关键词
永磁同步电机
单电阻电流采样
电流重构技术
电流观测器
permanent magnet synchronous motor (PMSM)
single-resistance current sampling
current reconstruction technique
current observer
