可調(diào)偏置電流磁懸浮系統(tǒng)的數(shù)字控制
發(fā)布時間：2018-07-29 13:57
【摘要】：一般的主動磁懸浮軸承線圈中的電流由偏置電流和控制電流兩部分組成。為了降低磁懸浮軸承的損耗,本文分別設(shè)計制作了軸向零偏置電流徑向有偏置電流控制器和五自由度零偏置電流控制器,研究了含兩種控制器磁懸浮軸承轉(zhuǎn)子系統(tǒng)的動態(tài)性能。研究結(jié)果表明,與一般磁懸浮軸承轉(zhuǎn)子系統(tǒng)相比,軸向零偏置電流控制方式對系統(tǒng)動態(tài)性能沒有影響,而徑向零偏置電流控制方式顯著降低了系統(tǒng)的動態(tài)性能。 在此基礎(chǔ)上,本文設(shè)計制作了基于TMS320F2812DSP的變偏置電流控制器的硬件電路,采用C語言編制了變偏置電流PID控制軟件,完成了轉(zhuǎn)子的穩(wěn)定懸浮和高速旋轉(zhuǎn)試驗。試驗結(jié)果表明,當(dāng)系統(tǒng)越過各階臨界轉(zhuǎn)速時,應(yīng)采用徑向有偏置電流控制方式,而當(dāng)系統(tǒng)轉(zhuǎn)速遠(yuǎn)離各階臨界轉(zhuǎn)速時,可采用徑向低偏置電流控制方式。這一策略不僅能使系統(tǒng)在整個轉(zhuǎn)速范圍內(nèi)保持良好的動態(tài)性能,同時磁懸浮軸承的渦流和磁滯損耗小。
[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.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH133.3
本文編號：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.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH133.3
【引證文獻(xiàn)】
相關(guān)期刊論文 前1條
1 謝振宇;龍亞文;徐欣;;零偏置電流磁軸承轉(zhuǎn)子系統(tǒng)動態(tài)性能的試驗研究[J];機械工程學(xué)報;2013年15期
相關(guān)碩士學(xué)位論文 前1條
1 肖鵬飛;傳感器冗余的磁懸浮軸承轉(zhuǎn)子系統(tǒng)研究[D];南京航空航天大學(xué);2012年
，本文編號：2152896
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