摘要
异步电动机转子断条是笼型异步电动机的常见故障之一.转子断条故障在线分析中必须考虑电动机实际运行和检测条件.带通数字滤波器可以有效地滤除电网谐波和在线检测系统引入的"电磁噪声",希尔伯特模量频谱分析对电网频率波动、负载波动和电网谐波等因素的干扰具有一定的鲁棒性能.在理论分析、仿真和实验的基础上,提出了基于带通数字滤波和希尔伯特包络频谱分析的异步电动机转子断条在线检测方法.仿真和实验表明,该方法不仅可以抑制干扰因素的影响,有效提取故障特征量并实现故障准确诊断,而且能够反映频率波动的范围,是一种切实可行的在线诊断方法.
Rotor bar breaking is one frequent fault of induction motor.The actual operating conditions of motors must be taking account in detecting rotor bar breaking fault on-line.The band-pass filter can remove the interference signal effectively caused by harmonic of the network and inducted by the on-line detection system.The envelope of Hilbert has certain robustness in signal processing even taking into account the quality of power supply and the load fluctuation of the induction motors.Based on theoretical analysis,simulation and experimentation,the paper presents a new on-line detection scheme that combines the band-pass filter and Hilbert envelope analysis.
出处
《机电设备》
2011年第5期13-15,18,共4页
Mechanical and Electrical Equipment
