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shaft voltages
相关语句
  轴电压
    Effects of large capacity PWM inverter on AC motor bearing currents and shaft voltages
    大容量PWM逆变器对交流电机的轴电压和轴承电流的影响
短句来源
    This paper introduces the effects of PWM inverter on AC motor bearing currents and shaft voltages, focuses on the causes, effects, and remedies.
    本文就在大容量 PWM逆变器供电情况下 ,逆变器对交流电机的轴承造成损坏的起因 ,影响和补救措施作了综述 ,着重介绍了所产生的轴电压和轴承电流对轴承的损坏作用
短句来源
  轴电压
    Effects of large capacity PWM inverter on AC motor bearing currents and shaft voltages
    大容量PWM逆变器对交流电机的轴电压和轴承电流的影响
短句来源
    This paper introduces the effects of PWM inverter on AC motor bearing currents and shaft voltages, focuses on the causes, effects, and remedies.
    本文就在大容量 PWM逆变器供电情况下 ,逆变器对交流电机的轴承造成损坏的起因 ,影响和补救措施作了综述 ,着重介绍了所产生的轴电压和轴承电流对轴承的损坏作用
短句来源
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  shaft voltages
The shaft voltages consist of peaks with a time constant of some μs.
      
The operation of large electrical machines like turbo-generators with ratings of several hundred MVAs by static frequency converters can cause shaft voltages of several hundred volts.
      
Medium frequency shaft voltages in large frequency converter driven electrical machines
      
The approach reduces the capacitive and induced shaft voltages by more than 80% in the examined 1.4MW induction motor drive.
      
Reduction of capacitive and induced shaft voltages in an induction motor drive using dual-bridge inverter approach
      
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This paper introduces the effects of PWM inverter on AC motor bearing currents and shaft voltages, focuses on the causes, effects, and remedies.

本文就在大容量 PWM逆变器供电情况下 ,逆变器对交流电机的轴承造成损坏的起因 ,影响和补救措施作了综述 ,着重介绍了所产生的轴电压和轴承电流对轴承的损坏作用

Based on transmission line theory, this paper analyzes phenomena of generating the over voltage at the terminal of the motor fed by PWM pulse. By use of the finite element method, the values of distributed parameters of the motor windings are obtained, which reveals the root cause of asymmetry winding voltage distribution is the excessively high d v /d t of the input pulse. Meanwhile,due to the distributing capacitance, a coupling voltage loop is composed between the winding and the bearing....

Based on transmission line theory, this paper analyzes phenomena of generating the over voltage at the terminal of the motor fed by PWM pulse. By use of the finite element method, the values of distributed parameters of the motor windings are obtained, which reveals the root cause of asymmetry winding voltage distribution is the excessively high d v /d t of the input pulse. Meanwhile,due to the distributing capacitance, a coupling voltage loop is composed between the winding and the bearing. When the PWM pulses reach the motor, two types of bearing current, the EDM current and d v /d t current, may occur, and these will result in premature bearing failure. The simulation and theoretical analyses of the shaft voltage and bearing currents are described. Furthermore, a filter is designed to restrain the d v /d t .

基于传输线理论 ,讨论了PWM脉冲对过电压的影响。在利用有限元分析法获得电机绕组分布参数值的基础上 ,得到绕组电压分布不均的根本原因是输入脉冲的dv/dt太大。由于分布电容的存在 ,定子绕组和轴承形成电压耦合回路 ,PWM脉冲输入时 ,电机轴承电流存在dv/dt电流和EDM电流两种基本形式 ,导致电机轴承过早损坏。文中就此进行了理论和仿真分析 ,设计了一种滤波器用于抑制过高的电压上升率dv/dt。

Nowadays, the static excitation system is becoming more popular. Based on its speciality, this article provides some new technology, e.g. system configuration, shaft voltage absorbor, pulse losing monitor, field communication and remote diagnosis etc.

基于目前大中型同步发电机广泛采用静态励磁系统 ,该文针对静态励磁系统的特殊性 ,提出了关于系统配置、轴电压吸收、失脉冲检测、通讯及远程诊断等方面的最新技术 ,以满足日益提高的可靠性要求。

 
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