摘要
为了抑制无刷直流电机的换相转矩脉动,提出了一种模型预测占空比补偿量控制算法。介绍一种混合补偿机制,以换相区中关断相受控管和导通相、非换相相中的受控上管为控制对象,对其驱动占空比进行补偿。基于换相总过程中与换相开始时电磁转矩的偏差,构造换相转矩脉动价值函数,以其最小为目标,求解出无换相转矩脉动的约束条件。进行占空比补偿量自适应预测,即根据换相电路模型建立电流微分方程,结合无换相转矩脉动约束条件,预测出占空比补偿量之间的关系式,并引入自适应调整因子对占空比补偿值进行自适应分配。实验验证了该算法的有效性。
A model predictive compensatory duty cycle control algorithm was proposed to suppress the commutation torque ripple of brushless DC motor.A hybrid compensation mechanism was put forward,where the controlled switch of the off-going phase and the controlled upper switch in the on-going and non-commutation phases were taken as the control objects,with their driving duty cycles being compensated.The cost function of commutation torque ripple was constructed based on the deviation of electromagnetic torque between the overall commutation process and the beginning of commutation,and the constraint condition of no commutation torque ripple was obtained with the goal of minimizing the cost function.The adaptive prediction of duty cycle compensation was carried out.In this process,the current differential equation was established according to the circuit model of commutation,the relationship between duty cycle compensations was predicted combined with the constraint condition of no commutation torque ripple,and an adaptive adjustment factor was also introduced to adaptively distribute the values of duty cycle compensations.Experimental results verified the effectiveness of the proposed algorithm.
作者
李博群
孙志锋
LI Boqun;SUN Zhifeng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《微特电机》
2022年第3期5-10,共6页
Small & Special Electrical Machines
基金
国家自然科学基金重点项目(91647209)。
关键词
无刷直流电机
模型预测占空比补偿量控制
混合补偿机制
换相转矩脉动价值函数
占空比补偿量自适应预测
brushless DC motor(BLDCM)
model predictive duty cycle compensation control(MPDCCC)
hybrid compensation mechanism
cost function of commutation torque ripple
adaptive prediction of duty cycle compensation
