磁悬浮轴承非定向差动控制方式研究

Research on Non-directional Differential Control Strategy of Active Magnetic Bearing

提出非定向差动控制方式,通过独立控制各差动磁极对,提高参与控制的最少差动磁极对数量,以提高磁悬浮轴承的承载能力。以16极径向磁悬浮轴承为例,详细介绍了非定向差动控制方式与常规差动控制方式,对比了两种控制方式的等效刚度和等效阻尼、复刚度和复阻尼、名义承载力等支承性能。通过高速旋转试验验证两种控制方式下系统的控制性能。理论分析结果表明,采用非定向差动控制方式时,磁悬浮轴承的承载能力提高了8.24%,最大承载力提高了30.657%。试验结果表明,采用非定向差动控制方式时,系统具有更好的控制效果。

A non-directional differential control method is proposed.By independently controlling each differential magnetic pole pair,the minimum number of differential magnetic pole pairs participating in the control is increased to improve the bearing capacity of the active magnetic bearing.Taking 16-pole radial magnetic bearing as an example,the non-directional differential control method and the conventional differential control method are introduced in detail,and supporting performance such as the equivalent stiffness and equivalent damping,complex stiffness and complex damping,and nominal bearing capacity of the two control methods are compared.Verify the control performance of the system under the two control modes through high-speed rotation test.Theoretical analysis results show that when the non-directional differential control method is adopted,the bearing capacity of the magnetic bearing is increased by 8.24%,and the maximum bearing capacity is increased by 30.657%.The test results show that when the non-directional differential control mode is adopted,the system has a better control effect.