CAJ | 학술논문

PWM变频器的广泛应用大大改善了电机调速性能，但是，由于PWM变频器共模电压在电机内部耦合电容作用下，形成轴电压和轴电流，会引起轴承早期失效危及系统安全运行。轴电流问题的研究包括对轴电流的分析、预测和抑制。然而这些过程需要轴电压和轴电流的准确测量进行验证和比对分析。设计合理而有效的测量装置和测量方法是非常重要的一环。在分析轴电流产生机理的基础上，对现有的各种轴电流测量方法和轴承阻抗特性测试方法进行介绍，总结对比这几种方法的优缺点，为轴电流的测试平台的新设计提供参考。
PWM변빈기적엄범응용대대개선료전궤조속성능，단시，유우PWM변빈기공모전압재전궤내부우합전용작용하，형성축전압화축전류，회인기축승조기실효위급계통안전운행。축전류문제적연구포괄대축전류적분석、예측화억제。연이저사과정수요축전압화축전류적준학측량진행험증화비대분석。설계합리이유효적측량장치화측량방법시비상중요적일배。재분석축전유산생궤리적기출상，대현유적각충축전류측량방법화축승조항특성측시방법진행개소，총결대비저궤충방법적우결점，위축전류적측시평태적신설계제공삼고。
PWM inverter is widely applied in industry, which brings better motor speed control performance. However, the common mode voltage of PWM inverter drive system will induce bearing voltage and baring current in the motor under the influence of the coupled capacitance of the motor, which cause reduction of the bearing lifetime and threaten of the safety of driving system. The research of bearing current problems includes analysis, prediction and suppression. These processes require the bearing voltage and bearing current to be accurately measured. Then, it plays a significant part to design the reasonable and effective measuring devices and measuring methods. In this paper, after analyzing the generating mechanism of bearing current, the various existing bearing current measuring methods and bearing impedance characteristic test methods are introduced. The advantages and disadvantages of these methods are summarized and compared. It provides a reference for designing new test platform to measure bearing current.