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具有零序电流自矫正的六相永磁同步电机直接转矩控制

DOI: 10.13334/j.0258-8013.pcsee.2015.10.017, PP. 2504-2512

Keywords: directtorquecontrol(DTC),six-phasesymmetricwindingpermanentmagnetsynchronousmotor,zero-sequencecurrent,dead-zonecompensation,PIcontrol

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Abstract:

逆变器死区、功率管导通压降及开关过渡过程等非线性因素易导致直接转矩控制(directtorquecontrol,DTC)多相永磁同步电机定子电流严重畸变。该文针对六相对称偏置60°定子绕组永磁同步电机提出一种DTC策略。首先,基于零序电流等于零思想进行电压矢量重构,并由此提出理想DTC;其次,基于死区补偿原理对实际电压矢量作用时间进行离散补偿;最后,利用PI调节器对电压矢量作用时

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