可调偏置电流磁悬浮系统的数字控制
发布时间：2018-07-29 13:57
【摘要】：一般的主动磁悬浮轴承线圈中的电流由偏置电流和控制电流两部分组成。为了降低磁悬浮轴承的损耗,本文分别设计制作了轴向零偏置电流径向有偏置电流控制器和五自由度零偏置电流控制器,研究了含两种控制器磁悬浮轴承转子系统的动态性能。研究结果表明,与一般磁悬浮轴承转子系统相比,轴向零偏置电流控制方式对系统动态性能没有影响,而径向零偏置电流控制方式显著降低了系统的动态性能。 在此基础上,本文设计制作了基于TMS320F2812DSP的变偏置电流控制器的硬件电路,采用C语言编制了变偏置电流PID控制软件,完成了转子的稳定悬浮和高速旋转试验。试验结果表明,当系统越过各阶临界转速时,应采用径向有偏置电流控制方式,而当系统转速远离各阶临界转速时,可采用径向低偏置电流控制方式。这一策略不仅能使系统在整个转速范围内保持良好的动态性能,同时磁悬浮轴承的涡流和磁滞损耗小。
[Abstract]:The current in the active magnetic bearing coil is composed of bias current and control current. In order to reduce the loss of maglev bearing, a radial offset current controller with axial zero bias current and a zero offset current controller with five degrees of freedom are designed and fabricated respectively. The dynamic performance of rotor system with two kinds of controllers is studied. The results show that the axial zero bias current control mode has no effect on the dynamic performance of the system compared with the general magnetic bearing rotor system, while the radial zero offset current control mode significantly reduces the dynamic performance of the system. On this basis, the hardware circuit of the variable bias current controller based on TMS320F2812DSP is designed and fabricated. The PID control software of variable bias current is programmed by C language, and the stable suspension and high speed rotation test of the rotor are completed. The experimental results show that the radial bias current control mode should be adopted when the system passes the critical speed of each order, and the radial low offset current control mode can be used when the system speed is far from the critical speed of each order. This strategy not only enables the system to maintain good dynamic performance in the whole rotational speed range, but also reduces the eddy current and hysteresis loss of the maglev bearing.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3
本文编号：2152896
[Abstract]:The current in the active magnetic bearing coil is composed of bias current and control current. In order to reduce the loss of maglev bearing, a radial offset current controller with axial zero bias current and a zero offset current controller with five degrees of freedom are designed and fabricated respectively. The dynamic performance of rotor system with two kinds of controllers is studied. The results show that the axial zero bias current control mode has no effect on the dynamic performance of the system compared with the general magnetic bearing rotor system, while the radial zero offset current control mode significantly reduces the dynamic performance of the system. On this basis, the hardware circuit of the variable bias current controller based on TMS320F2812DSP is designed and fabricated. The PID control software of variable bias current is programmed by C language, and the stable suspension and high speed rotation test of the rotor are completed. The experimental results show that the radial bias current control mode should be adopted when the system passes the critical speed of each order, and the radial low offset current control mode can be used when the system speed is far from the critical speed of each order. This strategy not only enables the system to maintain good dynamic performance in the whole rotational speed range, but also reduces the eddy current and hysteresis loss of the maglev bearing.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3
【引证文献】
相关期刊论文 前1条
1 谢振宇;龙亚文;徐欣;;零偏置电流磁轴承转子系统动态性能的试验研究[J];机械工程学报;2013年15期
相关硕士学位论文 前1条
1 肖鹏飞;传感器冗余的磁悬浮轴承转子系统研究[D];南京航空航天大学;2012年
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