永磁同步电机新型单电阻电流重构技术研究
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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.
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.
引文
[1] CHO Y,LA B T,LAI J.A three-phase current reconstruction strategy with online current offset compensation using a single current sensor[J].IEEE Transactions on Industrial Electronics,2012,59(7):2924.
[2] GU Y K,NI F L,YANG D P,et al.Switching-state phase shift method for three-phase-current reconstruction with a single DC-link current sensor[J].IEEE Transactions on Industrial Electronics,2011,58(11):5186.
[3] 储剑波,胡育文,黄文新,等.一种变频器相电流采样重构技术[J].电工技术学报,2010,25(1):111.
[4] 周聪,刘闯,王凯,等.用于开关磁阻电机驱动系统的新型单电阻电流采样技术[J].电工技术学报,2017,32(5):56.
[5] 蔡骏,邓智泉.基于全周期电感法的开关磁阻电机无位置传感器控制技术[J].电工技术学报,2013,28(2):145.
[6] 夏鲲,朱琳玲,曾彦能,等.基于准Z源网络的永磁无刷直流电机换相转矩脉动抑制方法[J].中国电机工程学报,2015,35(4):971.
[7] GAN C,WU J,YANG S,et al.Phase current reconstruction of switched reluctance motors from DC-link current under double high-frequency pulses injection[J].IEEE Transactions on Industrial Electronics,2015,62(5):3265.
[8] 马鸿雁,孙凯,魏庆,等.PWM逆变器相电流重构研究与误差分析[J].电工技术学报,2011,26(1):108.
[9] 刘亚静,王鹏飞,王治国,等.一种母线全电流采样策略的研究[J].电机与控制学报,2011,15(3):58.
[10] METIDJI B,TAIB N,BAGHLI L,et al.Phase current reconstruction using a single current sensor of three-phase AC motors fed by SVM-ontrolled direct matrix converters[J].IEEE Transactions on Industrial Electronics,2013,60(12):497.
[2] GU Y K,NI F L,YANG D P,et al.Switching-state phase shift method for three-phase-current reconstruction with a single DC-link current sensor[J].IEEE Transactions on Industrial Electronics,2011,58(11):5186.
[3] 储剑波,胡育文,黄文新,等.一种变频器相电流采样重构技术[J].电工技术学报,2010,25(1):111.
[4] 周聪,刘闯,王凯,等.用于开关磁阻电机驱动系统的新型单电阻电流采样技术[J].电工技术学报,2017,32(5):56.
[5] 蔡骏,邓智泉.基于全周期电感法的开关磁阻电机无位置传感器控制技术[J].电工技术学报,2013,28(2):145.
[6] 夏鲲,朱琳玲,曾彦能,等.基于准Z源网络的永磁无刷直流电机换相转矩脉动抑制方法[J].中国电机工程学报,2015,35(4):971.
[7] GAN C,WU J,YANG S,et al.Phase current reconstruction of switched reluctance motors from DC-link current under double high-frequency pulses injection[J].IEEE Transactions on Industrial Electronics,2015,62(5):3265.
[8] 马鸿雁,孙凯,魏庆,等.PWM逆变器相电流重构研究与误差分析[J].电工技术学报,2011,26(1):108.
[9] 刘亚静,王鹏飞,王治国,等.一种母线全电流采样策略的研究[J].电机与控制学报,2011,15(3):58.
[10] METIDJI B,TAIB N,BAGHLI L,et al.Phase current reconstruction using a single current sensor of three-phase AC motors fed by SVM-ontrolled direct matrix converters[J].IEEE Transactions on Industrial Electronics,2013,60(12):497.