當(dāng)電源模塊發(fā)生IFBK故障時(shí)，通常的原因是電流板反饋到電源模塊的電流信號(hào)不對(duì)，我們可以將電源模塊切換到開(kāi)環(huán)模式來(lái)查看電流板上檢測(cè)到的電流和電源模塊顯示的電流是否一致。如果不一致則可能是電流板連接到電源模塊的同軸電纜接觸不良，大部分情況下重新連接即可，或者更換電流板。
但是在開(kāi)環(huán)模式下，開(kāi)高壓仍然無(wú)輝光，則需要對(duì)電源模塊進(jìn)行深層次的排查。
When the power module has an IFBK fault, the common reason is that the current signal fed back by the current board to the power module is incorrect. We can switch the power module to the open-loop mode to check whether the current detected on the current board is consistent with the current displayed by the power module. If it is inconsistent, it may be that the coaxial cable connecting the current board to the power module has poor contact. In most cases, it can be reconnected or the current board can be replaced.
However, in the open loop mode, there is still no glow at the open high voltage, so it is necessary to carry out in-depth troubleshooting on the power module.
現(xiàn)在的故障可能有四個(gè)原因，我們逐級(jí)排查：1、電源模塊三相380V供電。如果電源模塊有報(bào)IFBK故障，則通過(guò)去掉CPU板上的J3跳線帽將電源模塊切換到開(kāi)環(huán)模式避免IFBK故障，從而進(jìn)行測(cè)量。
There may be four reasons for the current fault. We can check it step by step: 1. The three-phase 380V power supply of the power module. If the power module reports an IFBK fault, switch the power module to the open loop mode by removing the J3 jumper on the CPU board to avoid the IFBK fault, and then measure.
在開(kāi)高壓的情況下，電源模塊頂端的18,19,20號(hào)端子上應(yīng)該有三相交流380V電壓，
When the HV is turned on, there should be three-phase AC 380V voltage on terminals 18, 19 and 20 on the top of the power module,
如果沒(méi)有，則檢查如下線路是否將380VAC送到電源模塊
If not, check whether the following lines send 380VAC to the power module
如果以上沒(méi)問(wèn)題，則檢查電源模塊內(nèi)的濾波電容上有沒(méi)有530V左右的直流電壓
If there is no problem above, check whether there is about 530V DC voltage on the filter capacitor in the power module
如果沒(méi)有，則可能是整流橋損壞，如果530VDC無(wú)問(wèn)題，則可進(jìn)行下一項(xiàng)檢查。
If not, the rectifier bridge may be damaged. If 530VDC is OK, the next inspection can be carried out.
2、CPU和接口板發(fā)送到驅(qū)動(dòng)板的信號(hào)有問(wèn)題
2. Is there a problem with the signal sent by the CPU and interface board to the driver board？
首先檢查接口板連接到該位置的電纜是否牢固
First, check whether the cable connecting the interface board to this position is secure
如果電纜連接沒(méi)有問(wèn)題，則進(jìn)行下面的測(cè)試，去掉CPU板上的J3跳線帽將電源模塊切換到開(kāi)環(huán)模式，否則會(huì)報(bào)電源模塊故障。
If there is no problem with the cable connection, carry out the following test, remove the J3 jumper on the CPU board and switch the power module to the open-loop mode, otherwise the power module fault will be reported.
斷開(kāi)PLC控制板上的CB3空開(kāi)，禁止380VAC送到電源模塊，防止強(qiáng)制給電源模塊測(cè)試信號(hào)的時(shí)候發(fā)生放電
Disconnect the CB3 air switch on the PLC control board and prohibit 380VAC from being sent to the power module to prevent discharge when the power module is forced to test the signal
將PLC上Q1.7輸出點(diǎn)上的40號(hào)線摘下，接到該控制板上的任一24V上，強(qiáng)制給電源模塊啟動(dòng)信號(hào)
Remove the 40 # line on the Q1.7 output point on the PLC, connect it to any 24V on the PLC control board, and force the power module to start the signal
如果在以下的檢測(cè)過(guò)程中由于誤觸導(dǎo)致電源模塊故障，則需要激光器斷電后再重新上電清除電源模塊故障。
If the power module fails due to wrong touch during the following detection process, the laser needs to be powered off and then powered on again to clear the power module failure.
之后在驅(qū)動(dòng)板上檢測(cè)以下三個(gè)15V電壓正常
After that, the following three 15V voltages are normal on the drive board
如下圖，用示波器監(jiān)測(cè)驅(qū)動(dòng)板上R13,R14,R15,R16電阻的兩端的信號(hào)，在未放電時(shí)是0V，在放電時(shí)是一個(gè)17kHz 15V的脈沖信號(hào)。由于前面我們已經(jīng)強(qiáng)制給電源模塊一個(gè)啟動(dòng)信號(hào)，因此現(xiàn)在應(yīng)該可以檢測(cè)到脈沖信號(hào)，如果可以檢測(cè)到這4路脈沖信號(hào)，則證明CPU板和接口板發(fā)過(guò)來(lái)的信號(hào)沒(méi)問(wèn)題。
As shown in the following figure, use an oscilloscope to monitor the signals at both ends of R13, R14, R15, and R16 resistors on the drive board, which are 0V when not discharging and a 17kHz 15V pulse signal when discharging. Since we have forced a start signal to the power module, we should be able to detect the pulse signal now. If we can detect these four pulse signals, it will prove that the signal from the CPU board and the interface board is OK.
如果沒(méi)有示波器，也可以用萬(wàn)用表的直流檔來(lái)檢測(cè)，沒(méi)放電時(shí)是0V，放電時(shí)是一個(gè)低于15V的直流電壓，電壓大小隨功率設(shè)置信號(hào)的大小而改變。由于前面我們已經(jīng)強(qiáng)制給電源模塊一個(gè)啟動(dòng)信號(hào)，如果CPU板和接口板發(fā)過(guò)來(lái)的信號(hào)沒(méi)問(wèn)題，則可以檢測(cè)到一個(gè)低于15V的電壓。
If there is no oscilloscope, you can also use the DC range of the multimeter to detect. When there is no discharge, it is 0V. When it is discharged, it is a DC voltage lower than 15V. The voltage changes with the value of the power setting signal. Since we have forced a start signal to the power module, if the signal from the CPU board and interface board is OK, we can detect a voltage lower than 15V.
如果檢測(cè)到信號(hào)有問(wèn)題，則證明接口板和CPU板有問(wèn)題。
If a problem is detected with the signal, it is proved that there is a problem with the interface board and CPU board.
否則進(jìn)行以下驅(qū)動(dòng)板的檢測(cè)。
Otherwise, carry out the following drive board detection.
3、驅(qū)動(dòng)板檢測(cè)：如下圖四處的信號(hào)在電源正常工作時(shí)是有高壓存在，因此，檢測(cè)時(shí)切記CB3空開(kāi)斷開(kāi)，否則可能總成人員傷害及儀器損壞。
3. Drive board detection: as shown in the figure below, the signals at four places have high voltage when the power supply works normally. Therefore, remember to disconnect the CB3 air switch during detection, otherwise the assembly may be injured and the instrument may be damaged.
以下四處在未放電時(shí)是10V左右直流，在放電時(shí)是一個(gè)17kHz 10V左右的脈沖信號(hào)。由于前面我們已經(jīng)強(qiáng)制給電源模塊一個(gè)啟動(dòng)信號(hào)，因此現(xiàn)在應(yīng)該可以檢測(cè)到脈沖信號(hào)，如果可以檢測(cè)到這4路脈沖信號(hào)，則證明驅(qū)動(dòng)板沒(méi)有問(wèn)題。
The following four parts are about 10V DC when they are not discharged, and a pulse signal of about 17kHz 10V when they are discharged. Since we have forced a start signal to the power module, we should be able to detect the pulse signal now. If we can detect these four pulse signals, it will prove that there is no problem with the drive board.
如果沒(méi)有示波器，也可以用萬(wàn)用表的直流檔來(lái)檢測(cè)，沒(méi)放電時(shí)是10V左右直流電壓，放電時(shí)是一個(gè)低于10V的直流電壓，電壓大小隨功率設(shè)置信號(hào)的大小而改變。由于前面我們已經(jīng)強(qiáng)制給電源模塊一個(gè)啟動(dòng)信號(hào)，如果CPU板和接口板發(fā)過(guò)來(lái)的信號(hào)沒(méi)問(wèn)題，則可以檢測(cè)到一個(gè)低于10V的電壓。
If there is no oscilloscope, you can also use the DC range of the multimeter to detect. When there is no discharge, it is about 10V DC voltage. When there is discharge, it is a DC voltage lower than 10V. The voltage changes with the value of the power setting signal. Since we have forced a start signal to the power module, if the signal from the CPU board and interface board is OK, a voltage lower than 10V can be detected.
如果檢測(cè)到信號(hào)有問(wèn)題，則大概率是對(duì)應(yīng)的U1,U3,U6,U7光耦損壞，也不排除IPM損壞。
If a problem is detected in the signal, the high probability is that the corresponding U1, U3, U6, U7 optocoupler is damaged, and the IPM is also damaged.
4、如果以上的檢測(cè)都正常，則在斷電的情況下，恢復(fù)PLC上Q1.7輸出點(diǎn)上的40號(hào)線和CB3空開(kāi)，啟動(dòng)激光器，開(kāi)高壓。
4. If the above tests are normal, turn off the power of the laser, restore the line 40 on the Q1.7 output point on the PLC, start the laser and turn on HV.
采用帶有隔離電壓高于1000V探頭的示波器監(jiān)測(cè)電源模塊頂部端子上的1(TR1)，2(TR2)這兩個(gè)點(diǎn)，可以檢測(cè)到幅值600V左右，頻率17kHz的電壓。
Using an oscilloscope with a probe with isolation voltage higher than 1000V to monitor the two points 1 (TR1) and 2 (TR2) on the top terminal of the power module, the voltage with amplitude of about 600V and frequency of 17kHz can be detected.
如果沒(méi)有帶有隔離電壓高于1000V探頭的示波器，也可以用萬(wàn)用表的交流檔來(lái)做個(gè)大致的判斷，如果正常則會(huì)有幾百伏的電壓，如果不正常，則沒(méi)有電壓。通常采用指針式的模擬萬(wàn)用表可以檢測(cè)到電壓，采用數(shù)字式的萬(wàn)用表有些可以檢測(cè)到電壓，有些則顯示亂碼。
If there is no oscilloscope with a probe with isolation voltage higher than 1000V, you can also use the AC range of the multimeter to make a rough judgment. If it is normal, there will be hundreds of volts of voltage. If it is abnormal, there will be no voltage. Generally, analog multimeter with pointer type can detect voltage, while digital multimeter can detect voltage and display garbled code.
如果這個(gè)信號(hào)可以檢測(cè)到，則證明電源模塊沒(méi)有問(wèn)題，大概率是高壓油箱內(nèi)諧振電容壞了。如果檢測(cè)不到這個(gè)信號(hào)，則表明IPM損壞。
If this signal can be detected, it proves that there is no problem with the power supply module. It may be that the resonant capacitor in the high voltage oil tank is damaged. If this signal is not detected, the IPM is damaged.
