output off voltage 19o1 ∞

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UC3637 in the welding wire System


Structure in Figure 2UC3637 wire Circuit diagram for 100V [,franklin marshall outlet, W1 W4 available 8V12V a regulator,abercrombie paris, over-current sampling resistor R16 desirable 0. O20 resistance (set to protect current IOA). C using the above circuit made friends welding wire feeder gas-wire feed speed range of the measured wire 0m/min a 16.7m/mln,ed hardy rea, spinning thn / mln a 16.2m/min. l Factory] i_] I_ a few plants. 1nl] cbliv,abercrombie paris, al width Aout> Bout plant i. r] Factory] nr_] Width Area (Boat Figure 3UC3637 output drive waveform CL. L23 · application UC3637 PWM chip constitute reversible speed control has the following advantages: * 24 * The main performance parameters of the chip table 1UC3637 condition jl j-error amplifier output power absorption possession IV {~ 17; 0VIl a 5ol a ∞ ll ∞ lmA a 5ol a power output of Lake mushroom 1V {~ 17 = 0Vl5l11l15l11lft high output l13l13.6IlI3l136l1v voltage} v delete = 0vll ∞ lll20IlmV lose Pian Mu current Iv deleted = 0Vll2I10ll2l10IF [A hysteresis voltage lv delete = 0Vlll0Ill10IImV common mode range l-± · ± plus v1.v | + llI + vI .. v-+] lI + a jV possession limit circuit = 0V,ed hardy suomessa, output off voltage 19o1 ∞; 25 ℃ 一 0.: mV / ℃ input bias current-1C an exhausted l_,ralph lauren polo! E [A-10VS = ± 2.5 total model range v | '3 a + vi ': shutdown shutdown threshold values ​​{a 2.3-2.-2 ..- 232.52.7I hysteresis voltage I I1 Park Building Park l l three vlI hidden power offset a 10 a {l a 10-jl Sunburn gate voltage turn-off beginning killer value lI4.l5.0}:. l hysteresis ll. lfI5I. _l Dl100300lmTB power output part of the Lake Series ll supply current,ed hardy, etc. l l l Chi hoppers rose m {- under the spleen between lcL = w.I time l1J = ℃ l <1) allows the motor Reversible (2) when the motor stops a micro-vibration current, can eliminate the static friction dead zone (3) low speed, each FET drive pulse is wider, beneficial and reliable on-FET (4) low-speed operation and good stability of the motor Figure 4uo6 in Wire Circuit diagram of the two shown in Figure 2, Figure 4 constitutes part of the speed control circuit without feedback. For Speed ​​negative feedback, can be used with a DC tachometer generators, tachometer generator voltage to the negative feedback be synthesized using uc3637 internal voltage error amplifier (see Figure 1 EA, 15,16 leg input, 17 output leg) to provide control signals to the VR1 amplified dynamic side, you can achieve closed-loop speed control. 4 Conclusion (1) UC3637 chip applied to wire speed reversible motor circuit, high integration, easy to use. (2) UC3637 chip reversible speed control circuit, motor speed range, low speed motor running smoothly, it is suitable for gas welding send as 0 wire agencies such places requires wide speed range applications. References 1 U.S. UN / 'rRODE's CD-ROM d] ic leisure cricket dapp faint grumble out [DB] .2 U.S. Ⅱ l Company Manual [R]. POWERSEMICONDUCIDRSHl0D DI jack jack r1992 / 1993, lead-free soldering Fuji Electric has developed a lead-free soldering solder, the performance of existing products with the same patent-pending. Fuji Electric has developed a successful new solder soldering two species, one with a melting point of 2.20 ~ C of tin - silver material; the other is to use the melting point of 140 ~ C of Sn-Bi materials are added oxidation agents are a variety of compounds, making it the performance to the level of the original solder. This soldering solder solder currently used in power switches and other electronic components, printed circuit board soldering, etc., will further expand its use of heavy metal lead will accumulate in the environment and the human body, human respiratory system, cardiovascular system and nervous system damage, and affect children's mental development because of environmental protection requirements, the new lead-free solder will have a broad market (Li Zuoyong from
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want promotion. References

the mid-1990s

overall performance has improved