UPS power source is common breakdown analysis and processing
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source:ASEM CNC Machining
UPS is the abbreviation of UninterruptiblePowerSupply, namely the UPS UPS that we often say. It is one kind is contained store can the power source equipment of the device, constant voltage constant frequency that is main component with inverter, it is one of peripheral equipment with all of communication equipment, computer science department indispensable system that must not cut off the power, its action is to be below the case that the outside breaks power supply, wait for equipment power supply in time to the computer, lest affect,correspond interrupt, the throws estrangement hardware damage of important data. However while we are using UPS power source to regard protection as other target, itself of its UPS power source also often can produce a few breakdown, if UPS power source produced breakdown, cannot our load provides protective function. We are accordingly common to UPS power source the analytic processing of breakdown phenomenon undertakes introductory: Problem one: Output of power source of the UPS when report having city is normal, and the buzzer when the report that do not have city is long cry, without output. Breakdown analysis: From the phenomenon judgement is accumulator and inverter part breakdown, can press examination of the following program: 1, examination accumulator voltage, see accumulator whether undercharge, be like accumulator undercharge, the breakdown that should be being checked is accumulator itself still charges circuit breakdown. 2, it is normal to be like accumulator job voltage, job of circuit of examination inverter drive is regular, if drive circuit output is normal, explain inverter damages. 3, if job of inverter drive circuit is abnormal, check weaveform to produce circuit to have control signal output without PWM, if have control signal output, demonstrative breakdown is in inverter drive circuit. 4, if weaveform produces circuit to control signal without PWM,output, check its to whether output works because of protecting circuit and block, if have,find out of of protective reason; 5, if protect circuit to did not work and working voltage is normal, and undee generation circuit outputs a demonstrative weaveform to produce circuit to damage afore-mentioned order that discharge reason also can come over to undertake without PWM weaveform, can discover fault more quickly sometimes. Problem 2: A pair of result put inverter power level transistor attaint, change after be the same as model transistor, the reason that moving period of time burns out again is electric current too big, and cause electric current to cross big reason to have: 1, shed protective invalidation too. When inverter output has produced electricity, shed protective circuit too of of not effective; 2, wide modulation of arteries and veins (PWM) package breakdown, output two complementary and undee asymmetry, one guides a time is long, and another guides a time is short, make two arms job lopsided, even two arms guide at the same time, cause of of; of two canals attaint 3, power canal parameter differs bigger, right now although the input is symmetrical undee, output also is met asymmetry, this weaveform classics outputs transformer, cause slant magnetism, namely magnetic flux is lopsided, accumulate go down to bring about transformer saturation and electric current is added suddenly, burned-out power is in charge of, and burn out only, another also burns out subsequently. Problem 3: Accumulator voltage on the low side, but switch on the mobile phone charge more than 10 hours, accumulator voltage still is not filled go up. Breakdown analysis: From the phenomenon judgement is accumulator or charge circuit breakdown, can press examination of the following measure: 1, the examination charges voltage of circuit input output is normal; 2, it is normal that if charge,circuit is inputted, output is abnormal, disconnect accumulator is measured again, if still be out of order,charge of of circuit breakdown; 3, if disconnect,charge after accumulator circuit input, output all normal, show accumulator already because did not charge for a long time, be put too or already arrived life period wait for a reason and damage. Problem 4: After UPS power source switchs on the mobile phone, any indication is not had on face plate, UPS power source does not work. Breakdown analysis: From breakdown phenomenon judgement, its breakdown detects in town report input, accumulator and town report part and accumulator voltage detect loop: 1, examination town report inputs fuse whether of of burn down; 2, fuse of input of the report that be like city is in good condition, examination accumulator is safe whether burn down, because certain UPS does not arrive when self check when accumulator voltage, all output of meeting general UPS and show shut; 3, if accumulator is safe in good condition, examination town report detects circuit job is regular, if town report detects circuit job is abnormal and when UPS does not have the report that do not have city to start a function, UPS can shut all output to reach likewise show. 4, it is normal that if city detects,circuit works, reexamination accumulator voltage detects circuit is normal. Problem 5: In power source of UPS of the open when town report power supply is normal, inverter job indicator light twinkles, buzzer gives out discontinuous cry, UPS power source can work only in inversion condition, cannot change city electrician to make state. Breakdown analysis: Cannot undertake inversion power supply is changed to town report power supply, demonstrative inversion power supply appeared partly to changeover of town report power supply breakdown, want to detect mainly: 1, whether does fuse of town report input damage; 2, fuse of input of the report that be like city is in good condition, circuit of wave of filter of commutate of examination town report outputs of of whether normal; 3, output of circuit of wave of filter of commutate of the report that be like city is normal, examination town report detects circuit is normal; 4, if town report detects circuit is normal, it is normal that reexamination inversion power supply controls output to changeover of town report power supply. Problem 6: The job when a mothball UPS has town report is regular, the inverter when the report that do not have city has output, but output voltage on the low side, at the same time transformer gives out bigger noise. Breakdown analysis: Inverter has output to explain circuit of end class drive is basic and normal, the asymmetry of two arms job that transformer has noise to show push-pull circuit, detect move is as follows: 1, examination power is normal; 2, if power is normal, signal of output of circuit of wide output of reexamination arteries and veins is normal; 3, if arteries and veins is wide output circuit output is normal, the output of reexamination drive circuit is normal. Problem 7: Below the situation that receives town report, open UPS UPS every time, hear the behavioral voice that relay relapses, too low indicator light grows voltage of batteries of face plate of UPS power source bright and buzzer is long cry. According to afore-mentioned breakdown the phenomenon can judge: This breakdown is by accumulator voltage passes low, bring about UPS not to start what succeed and cause thereby. Tear open next accumulator, have equalizing charge first (all accumulator paralell connection undertakes charging) , if still do not succeed, change only accumulator. Problem 8: UPS power source can by town report power supply cannot turn for inversion power supply. Breakdown analysis: Cannot undertake town report is changed to inversion power supply, explain town report changes partial occurrence breakdown to inversion power supply, want to detect mainly: 1, whether does accumulator voltage pass low, accumulator fuse is in good condition; 2, if accumulator part is normal, examination accumulator voltage detects of whether normal; is like circuit accumulator voltage detects circuit is normal, it is normal that reexamination town report controls output to changeover of inversion power supply. Problem 9: Power source of mothball type UPS is close to when load when be fully loaded with, town report power supply is normal, and fusing of fuse of the accumulator when accumulator power supply. Breakdown analysis: Accumulator fuse fusing, demonstrative accumulator power supply has flowed big, detect move is as follows: 1, inverter whether of puncture; 2, whether does accumulator voltage cross of low; 3, if accumulator voltage is too low, detect again accumulator charges circuit is normal; 4, if accumulator charges circuit is normal, detect again accumulator voltage detects circuit job is regular. CNC Milling