改进的单轴弱磁控制算法的仿真研究
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摘要
基于弱磁控制系统中出现的诸如控制滞后、电流环调节难以退出饱和等问题,设计了一种改进单轴弱磁控制方法。首先分析了改进的单轴弱磁控制的原理;然后,利用电压极限值的方法计算推导了交轴给定电压值,并提出了电机在弱磁区和恒转矩区域之间来回切换的条件;接下来按照电压矢量大小将SVPWM划分为3个不同调制区域,并分别设计了相应的控制算法。最后的仿真结果表明,改进的单轴弱磁控制方法具有调节稳定、电流波动小、退饱和能力强等特点。
In order to solve the problem that the control lagged in the weak magnetic control system and the current loop adjustment was difficult to withdraw from the saturation problem,an improved single axis weak magnetic control method was proposed.First,the improved principle of single axis magnetic flux control was analyzed.Then the given value of the AC axis voltage was calculated by the method of the voltage limit value,and the condition for the motor to switch back and forth between the weak magnetic zone and the constant torque zone was put forward.Next the SVPWM was divided into three different modulation regions according to the voltage vector size,and the corresponding control algorithms were designed respectively.The final simulation results showed that the improved single axis magnetic flux control method has the characteristics of stable adjustment,small current fluctuation and strong desaturation ability.
In order to solve the problem that the control lagged in the weak magnetic control system and the current loop adjustment was difficult to withdraw from the saturation problem,an improved single axis weak magnetic control method was proposed.First,the improved principle of single axis magnetic flux control was analyzed.Then the given value of the AC axis voltage was calculated by the method of the voltage limit value,and the condition for the motor to switch back and forth between the weak magnetic zone and the constant torque zone was put forward.Next the SVPWM was divided into three different modulation regions according to the voltage vector size,and the corresponding control algorithms were designed respectively.The final simulation results showed that the improved single axis magnetic flux control method has the characteristics of stable adjustment,small current fluctuation and strong desaturation ability.
引文
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[2]莫会成,王健,任雷.现代高性能交流伺服系统综述——驱动控制篇[J].微电机,2013,46(1):1-8.
[3]于家斌,秦晓飞,郑军,等.一种改进型超前角弱磁控制算法[J].电机与控制学报,2012,16(3):101-106.
[4]HU T,LIN F,LIN K,et al.A new flux-weakening control of PMSM based on optimal single current regulator[C].31st Chinese Control Conference,2012:6988-6993.
[5]石岛胜.小型交流伺服电机控制电路设计[M].北京:科学出版社,2013.
[6]秦晓飞,王云宽,郑军,等.交流伺服系统振动鲁棒M/T测速算法[J].电机与控制学报,2010,14(5):97-103.
[7]BOLOGNANI S,PETRELLA R,PREARO A,et al.Automatic tracking of MTPA trajectory in IPM motor drives based on AC current injection[J].IEEE Transactions on Industry Applications,2011,47(1):105-114.
[8]谢巍,何忠亮.采用改进型扰动观测器的控制方法[J].控制理论与应用,2010,27(6):695-700.
[9]王礼鹏,张化光,刘秀翀.低速PMSM无速度传感器调速系统积分滑模控制[J].电机与控制学报,2012,16(2):19-24,31.
[10]武建文,李德成.电机现代测试技术[M].北京:机械工业出版社,2015.
[11]徐琼,黄守道,祁宙,等.利用过调制区域的IPMSM弱磁控制方法[J].电力电子技术,2013,47(4):41-42,60.
[12]纪科辉.低速交流电机伺服系统的研究与实现[D].杭州:浙江大学,2013.
[13]唐任远.现代永磁电机理论与设计[M].北京:机械工业出版社,2016.
[14]魏萍,古云峰.基于抗积分饱和速度调节器的TSMCPMSM矢量控制[J].电测与仪表,2015,52(3):74-78.