 |
This is a good waveform |
 View larger image
 Download this waveform file for use with PicoScope
Alternator Voltage and Current (AC Coupled) Waveform Notes
The example waveform illustrates the rectified output from the alternator.
The contents of this waveform shows:-
- The output is correct and that there is no fault within the phase windings or the diodes (rectifier pack).
- The three phases from the alternator have been rectified to Direct Current (DC) from its original Alternating Current (AC) and that the three phases that contribute towards the alternators output are all functioning.
If the alternator was suffering from a diode fault, long downward ‘tails’ will appear from the trace at regular intervals and 33% of the total current output will be lost. A fault within one of the three phases will show a similar picture to the one illustrated but is three or four times the height, with the base to peak voltage in excess of 1 volt.
The voltage scale at the side of the oscilloscope is not representative of the charging voltage, but is representative of the upper and lower limits of the DC ripple. The ‘a(chǎn)mplitude’ of the waveform will vary under different conditions with a full charged battery showing a ‘flatter’ picture, while a discharged battery will show an exaggerated amplitude until the battery is charged.
汽車診斷 | 汽車診斷儀 | 汽車故障診斷儀 | 汽車測(cè)試儀 | 汽車分析儀 | 汽車診斷示波器 | 汽車電路測(cè)試儀 | 汽車電路分析儀 | 發(fā)動(dòng)機(jī)分析儀 | 發(fā)動(dòng)機(jī)綜合分析儀 | 發(fā)動(dòng)機(jī)檢測(cè)中心 | 點(diǎn)火分析儀 | 點(diǎn)火測(cè)試儀 | 汽車傳感器測(cè)試儀 | CAN總線示波器 | LIN總線示波器 | 汽車故障記錄儀 | 汽車傳感器分析儀 | 汽車檢測(cè)儀 | 噴油嘴測(cè)試儀 | 點(diǎn)火線圈測(cè)試儀 | 蓄電池測(cè)試儀 | 發(fā)電機(jī)測(cè)試儀 | 起動(dòng)機(jī)測(cè)試儀 | ABS傳感器測(cè)試儀 | ECU測(cè)試儀 | ECM測(cè)試儀 | 進(jìn)氣真空/壓力測(cè)試儀 | 排氣壓力測(cè)試儀 | 汽車技術(shù)培訓(xùn) | 爆震傳感器測(cè)試儀 | 缺火測(cè)試儀 | 缺缸測(cè)試儀 | 線路測(cè)試儀 | 引出線 | 汽車數(shù)字示波器 | 真空傳感器 | 高壓感應(yīng)測(cè)試頭 | 無分電器點(diǎn)火測(cè)試頭 | 獨(dú)立點(diǎn)火（COP）感應(yīng)測(cè)試頭 | 漏電測(cè)試儀 | 氣缸相對(duì)壓縮測(cè)試 | 電腦測(cè)試儀 | 發(fā)動(dòng)機(jī)控制器測(cè)試儀 | 泄漏測(cè)試儀 | 熒光檢漏 | 超聲波檢漏 | 汽車數(shù)字萬用表 | 電流鉗表 | 電流勾表 | 點(diǎn)火正時(shí)燈 |
