【摘要】：高速電機的轉(zhuǎn)速高、轉(zhuǎn)子細長,與常速電機相比接近臨界轉(zhuǎn)速的可能性大大增加,當電機額定轉(zhuǎn)速接近臨界轉(zhuǎn)速時,電機會發(fā)生劇烈的振動,甚至使轉(zhuǎn)子損壞。大功率高速電機的轉(zhuǎn)子長度遠遠大于轉(zhuǎn)子直徑,很難設計為剛性轉(zhuǎn)子,需要穿越1階臨界轉(zhuǎn)速,工作在1階臨界轉(zhuǎn)速和2階臨界轉(zhuǎn)速中間的安全區(qū)域,而這個安全區(qū)域的范圍卻很小,這對大功率高速電機轉(zhuǎn)子系統(tǒng)的動力學設計帶來了極大的困難�；谝慌_1.12MW、18 000r/min的高速永磁電機,對轉(zhuǎn)子系統(tǒng)的動力學特性進行理論分析,對有葉輪和無葉輪狀態(tài)下的轉(zhuǎn)子模態(tài)和臨界轉(zhuǎn)速進行計算,分析軸承支承剛度、陀螺效應以及轉(zhuǎn)子主要尺寸對臨界轉(zhuǎn)速的影響,并通過樣機進行了實驗驗證,總結(jié)了相應的規(guī)律,為大功率高速電機撓性轉(zhuǎn)子的設計提供了參考。
[Abstract]:The speed of high speed motor is high and the rotor is slender. Compared with the constant speed motor, the possibility of approaching the critical speed is greatly increased. When the rated speed of the motor is close to the critical speed, the motor will vibrate violently and even cause the rotor damage. The rotor length of high power high speed motor is far larger than the rotor diameter, so it is difficult to design rigid rotor. It needs to pass through the first order critical speed and work in the safe area between the first critical speed and the second critical speed. However, the range of this safe area is very small, which brings great difficulty to the dynamic design of high power high speed motor rotor system. Based on a high speed permanent magnet motor (PMSM) of 1.12MW / 18 000r/min, the dynamic characteristics of rotor system are theoretically analyzed. The rotor mode and critical speed under impeller and impeller condition are calculated, and the bearing supporting stiffness is analyzed. The gyro effect and the influence of the main rotor size on the critical speed are verified by the prototype, and the corresponding rules are summarized, which provides a reference for the design of the flexible rotor of the high power and high speed motor.
【作者單位】： 西安工業(yè)大學電子信息工程學院;中車永濟電機有限公司;沈陽工業(yè)大學電氣工程學院;沈陽工程學院機械工程學院;
【分類號】：TM351

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