Gears ' fault diagnosis by monitoring stator current 通過監(jiān)測電機(jī)的定子電流實現(xiàn)齒輪的故障診斷
Data acquisition and processing of stator current signal for asynchronous motors 異步電動機(jī)定子電流信號的數(shù)據(jù)采集與處理
The pulsating torque components caused by stator current divergence from ideal conditions are studied 消除轉(zhuǎn)矩脈動可以通過對定子電流加入諧波的方式完成。
Simulation results showed that this control strategy can decrease the stator current anti improve the efficiency of the system 仿真結(jié)果表明永磁同步電動機(jī)直接轉(zhuǎn)矩控制系統(tǒng)最大轉(zhuǎn)矩電流比控制可以降低定子電流,減小損耗,從而提高系統(tǒng)效率。
An inverse time - lag operating equation with accumulating stator current is achieved in this paper , according to the heating of the motor 根據(jù)同步電動機(jī)發(fā)熱機(jī)理,建立了累加定子電流的同步電動機(jī)發(fā)熱模型,較真實地反應(yīng)了同步電動機(jī)的發(fā)熱過程。
Finally , it proposes a new scheme that controls the power factor of pmsm . the model can control the power factor by controlling the stator current on the basis of the speed control 最后,建立了永磁同步電動機(jī)功率因數(shù)控制的仿真模型,在轉(zhuǎn)速控制的基礎(chǔ)上,通過控制定子電流來實現(xiàn)功率因數(shù)控制。
This paper deal with three - loop control system for synchronouns motor , stator current loop , var - current loop , exciter current loop . how to monitoring synchronizing error , and using 80196kc to control exciter 本文討論了三環(huán)控制的同步電動機(jī)勵磁系統(tǒng),即定子電流環(huán),無功電流環(huán)和勵磁電流環(huán)。以及同步電動機(jī)失步檢測及以80196kc進(jìn)行控制的方法。
A fast algorithm for wavelet transform is also proposed and applied in the extraction of the phase change rate for complex wavelet transform of stable - state stator current , which can detect broken rotor bar faults effectively 本文將該快速算法應(yīng)用到電機(jī)穩(wěn)態(tài)電流信號復(fù)值小波變換的相對相位變化率提取中,用以診斷異步電機(jī)的轉(zhuǎn)子故障。
The ideal bemf waveform of bldcm is trapezoid with 120 ! platform width . in the 120 conduction mode , the stator current is not ideal due to the stator inductance , and the torque ripple occurs 理想的永磁無刷直流電動機(jī)的反電動勢的波形是120平頂?shù)奶菪尾ǎ谌嗔鶢顟B(tài)120導(dǎo)通方式控制下,電流由于電機(jī)定子電感的存在而不是理想方波,因此產(chǎn)生了換相轉(zhuǎn)矩脈動。
Secondly , combined with the comparatively ripe ac motor mathematic model , the energy characteristic model of motor among the drive - line of pev is built , then the changes of motor stator current and voltage under different working condition can be calculated 然后引用較成熟的三相異步交流電機(jī)的數(shù)學(xué)模型建立了純電動汽車傳動系中電機(jī)的能量特性模型。利用該模型可計算出動態(tài)條件下電機(jī)定子相電流、相電壓的變化。