经沟通排除参数设定错误、人为误判等情况，在客户依据标准规范要求，针对电源回路进行共模浪涌4级测试时，存在浪涌干扰时控制板出现异常现象，浪涌实验结束时异常现象同步消失。这说明系统板确实受到共模浪涌干扰。

图1 客户FTU系统电源方案

上图1为客户的FTU系统电源方案。如果按照我司常规对EMC的测试操作规范的理解，电源回路打浪涌则应用时在前端AC-DC电源模块端口进行，共模浪涌干扰的路径存在于L/N到PE的闭环路径上。

路径1：AC-DC内部L/N直接到PE；

路径2：通过L/N、AC-DC输出端、Y电容连到PE；

路径3：通过L/N、AC-DC输出端、DC-DC模块、控制板空间耦合到PE。

既然控制板受到影响，那么一定是通过路径3造成的影响。但AC-DC模块的耐压隔离分别为3000VAC和1500VDC，加上控制板与PE只能通过空间耦合，因此该问题明显无法直接判定根本原因。

进一步与客户沟通，发现标准所表明的电源回路其实包括输入、输出两部分，这与单个电源模块进行电源输入端的浪涌测试存在差异。客户就是在AC-DC电源输出端进行浪涌四级测试时，才出现的异常状况。

Personality module PM020BS4030PH-0 for Electro-craft

Personality module PM020BH4030PLD-02 for Electro-craft

Personality module PM020BH430PH-0 for Electro-craft

Personality module PM030BF4050QH-0 for Electro-craft

Kollmorgen CR06550 Servostar Servo star cd drive Good

Kollmorgen CR03550 Servostar Servo star cd drive Good

MOELLER EASY621-DC-TC USPP EASY621DCTC 24v DC,12 in,8

SIEMENS 6SN1118-0AE11-0AA0 2 AXIS FEED SIMODRIVE 611

ABB YB161100-DR YB161-100 DSQS 174 DSQC 105 YB161102-AF

SIEMENS 6SN1123-1AB00-0HA1,SERVO MODULE AMPLIFIER 2 AXE

GIDDINGS & LEWIS CENTURION DS-100 DS120, 401-34201-22

Electro-Craft IQ2000 IQ-2000 PDM-30,9101-2163 PDM30 Wr 

Electro-Craft IQ2000 IQ-2000 PDM-20,9101-2162 PDM20 Wr 

Electro-craft PRO-450 PRO450 Reliance servo controller

Compumotor Digiplan Servo Drive BLH75B BLH 75B Parker

SIEMENS 6FC5203-0AF02-0AA1 SINUMERIK OP 012 operator

NEW SIEMENS 6SN1123-1AB00-0AA1, LT SERVO MODULE 2 AXIS 

SITOP SIEMENS 6EP1436-2BA00 POWER SUPPLY 400~500,24-20A

NEW MURR ELEKTRONIK MCS20-3X400-500/24 VDC POWER SUPPL

SIEMENS 6SN1114-0NB01-0AA0 PROFIBUS-DP OPTION MODULE A

NEW TOSHIBA MIG20J103H IGBT Module also see MIG30J103H

NEW TOSHIBA MIG30J103H IGBT Module also see MIG20J103H

NEW KOLLMORGEN GoldLine Motor MT1502A1-E2C3 , MTX1502A1

NEW 12 Rolls FA-134 FA134 ink Film for Panasoinc FAX

NEW KD224505 IGBT Module Mitsubishi KD 224505 fast ship

Lenze inverter 8200 Vector Drive E82EV551_2B , GOOD

NEW Indramat MAC071B-0-PS-4-C/095-A-0/WI520LV/S001

NEW KOLLMORGEN GoldLine Servo Motor MTC304B1-R1C1-028

NEW Reliance Electric F-4050-Q-H00AA 2144-01-802 Motor

Kollmorgen CE03550 Servostar Servo star drive,warranty

SIEMENS Simodrive 611 6SN1123 6SN1145 6SN1124

Electro-craft BRU-200 DM-20 DM-30,DM-50,BRU-500

NEW SANYO DENKI PMDPC1C3PA0 PM DRIVER PMOD102 PM0D102

Kollmorgen CR10250 Servostar Servo star drive,warranty

Electro-Craft IQ2000 IQ-2000 PDM-20,9101-2002 or 2003 

SIEMENS 6SN1123-1AA00-0DA0,SERVO AMPLIFIER,1YR WARRANTY

Electro-Craft BRU-200 BRU200 DM-20 9101-1302,1132 DM-30

SIEMENS 1FK6032-6AK71-1TG0 SERVO MOTOR RESOLVER WARRNTY

Electro-Craft BRU-200 BRU200 DM-30 DM30 9101-1303

SIEMENS 1FK6064-7AF71-1TH0 SERVO MOTOR RESOLVER WARRNTY

Kollmorgen Servo star LE06300 Servostar cd, Warranty

SIEMENS 6SN1123-1AA00-0BA0,SERVO AMPLIFIER,1YR WARRANTY

SIEMENS 6SN1118-0AA11-0AA1 1 AXIS FEED SIMODRIVE 611

NEW Kollmorgen CE06250 Servostar Servo drive 1 yr warra

SIEMENS NCU-BOX 6FC5247-0AA00-0AA2 SINUMERIK 840D/DE

SIEMENS SINUMERIK 840DE 6FC5357-0BB11-0AE0 NCU 571.2

DART Controls 253G-200C DC motor spd Control G07-01622

FANUC BIF04A1 TYPE : A03B-0808-C001 I/O module GOOD
 
Lenze Controller for EVS9327-ES EVS9328-ES EVS9324-ES

Electro-Craft BSA-30 Series 9106-0082 Servo BSA30 Good

Electro-Craft IQ2000 IQ-2000 PDM-10,9101-2161 PDM10 Wr 

EMERSON PCM-6 960057-01 POSITIONING SERVO DRIVE MODULE

SIEMENS 6SN1123-1AA00-0BA0,SERVO AMPLIFIER, WARRANTY

OMRON SYSDRIVE 3G3MV-CB037 INVERTER 200V 3.7kw 40A

TB wood's X4 AC drive X4C20010C,TB WOODS,TBWOODS, 

KOLLMORGEN GoldLine SERVO Motor MTC504C1-R1A1-013 full

HEIDENHAIN 1387-020-2048 ENCODER good
 
ABB ASC400 AC DRIVE ASC401600435 380-480V,4.9-6.6 AMP

NEW MG15N6ES42 IGBT Module TOSHIBA FAST SHIP AVAILABLE
 
NEW BSM75GB120DN2 IGBT Module EUPEC FAST SHIP AVAILABLE

NEW BSM 25GD 100D BSM25GD100D IGBT Module SIEMENS

Panasonic MUDS5A5A1A AC SERVO DRIVE MUDS 5A5A1A 50W 200

Compumotor S6-Drive S Series Parker Stepper Motor driv
 
Electro-Craft BSA-15 Series 9106-0001 Servo BSA15 Good
 
TOSHIBA MG25J6ES40 Compatible to IEF260A2 IGBT Module
 
Repair Kollmorgen CE06250,CE03250,CR20560,CE06550