2. 迅速进程的分步模仿法
有些操控进程,如步进电机的主动升降速进程,直流调速器的泊车制动进程,只要零点几秒的刹那间时刻。查寻这种迅速进程的电路缺点,显然无法选用一般外表进行缺点盯梢查看,所以缺点确诊对比艰难。下面经过缺点实例一5V型直流可控硅主驱动泊车时刻太长的缺点,介绍咱们选用的特别办法一分步模仿法。
经过对缺点板的开始查看,判断缺点因素在V5主驱动器制动电路。该制动操控逻辑杂乱,触及电路多,确诊缺点决非举手之劳,而且因为制动进程短,无法丈量,所以咱们选用分步模仿法进行确诊查看。由电路原理得知制动进程如下:
(1)本桥逆变,开释能量;(2)主动换桥,再生制动;(3)再次换桥,电路康复。
为了分步丈量的需求,以速度指令、速度反应和电流反应为设定量,将以上进程细分为八个过程(列成一张表),然后逐步改变相应设定量,查看有关电路信号,对照电路逻辑,查出缺点。咱们做分步测试进行到第二步(即速度指令由1变0)时,发现“a后移”和“积分中止”均为高电平,按电路逻辑,应为低电平,据此查对电路,很快找出A2板中与非门Dl06(类型:FZHI01)有疑问,替换后,缺点扫除。
NEW SED MANUAL BONNET AND HAND
WHEEL 0.50" 290A
HACH EC30 pH METER PART # 50100-60
NEW IKAMAG EOA 3 MAGNETIC STIRRER
ELECTRONIC STAINLESS
WAGNER INSTRUMENTS FORCE 5 DIGITAL
FORCE GAUGE FDV-100
STATE INDUSTRIAL METERING PUMP 120
VAC .35 AMP.63 GPH M仲鑫达
NEW BLH ELECTRONICS LOAD CELL LBP1
500 LBS # 420271
NEW SIGNET SCIENTIFIC FLOWMETER
PART# MK509
NEW BRUNSWICK SCIENTIFIC
PROGRAMMABLE DOSING PUMP NO FO仲鑫
达
NEW WATSON MARLOW PERISTALTIC PUMP
101U/R
NEW VWR AEROSOL FILTER PIPET TIPS
16466-006 100-1000uL
NEW COLE PARMER FLOWMETER PMR1-
010300
NEW GREAT LAKES INSTRUMENTS
ANALYZER CONDUCTIVITY ELECT仲鑫达
NEW 3" SED VALVE DIAPHRAGMS # 32
PTFM/EPDM 2-PIECE
NEW METTLER TOLEDO M-700 o2 MODULE
o2-4700i
NEW BRUNSWICK SCIENTIFIC
FIBRASTAGE LIFT TABLE WITH CON仲鑫
达
SWAGELOK SS-1RS10MM-A SS
REGULATING STEM
SARTORIUS DIGITAL PRECISION LAB
SCALE CPA124S
NEW MCCROMETER FLOWMETER 1/2" BALL
FLOW
NEW HANNA INSTRUMEMTS AMPHEL PVDF
FLAT TIP AMPLIFIED PH仲鑫达
NEW BRUNSWICK SCIENTIFIC
PROGRAMMABLE DOSING PUMP DP200
NEW WATSON MARLOW PERISTALTIC PUMP
302S
MEMBREX REPLACEMENT CENTRIFUGE
MOTOR MODEL BENCHMARK GX
DAGE MTI CAMERA NC-68L
NEW BETZ EVAPORATION TUBE 20 C ML
STATE INDUSTRIAL METERING PUMP 120
VAC .35 AMP.63 GPH M仲鑫达
CORNING SLOW SPEED 4 x 1L MAGNETIC
STIRRER WITH CONTROL仲鑫达
NEW WATSON MARLOW PERISTALTIC PUMP
503S
NEW COLE PARMER HIGH PH DOUBLE
JUNCTION PH ELECTRODE 10仲鑫达
NEW BIO-CHEM VALVE 080T6-S45 FLOW
SELECTION MANIFOLD V仲鑫达