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1、逆变焊机代替可控硅电焊机可行性分析报告 逆变焊机是现在国际焊机市场兴起的一种新产品，它不仅有高效节能、体积小、重量轻、多功能、多用途等特点；而且具有良好动、静特性和工艺特性。下面是测试的数据报告：测试设备：（1）逆变焊机（2）可控硅电焊机测试工况对比：相同工位 测试地点： 焊接车间测试时间： 二零零五年七月二十二日测试所用仪器： FLUKE 43B一 谐波的比较下图是逆变焊机和可控硅焊机的谐波含量的比较图标： 图1-1 逆变焊机的电流谐波含量 图1-2 可控硅焊机的电流谐波含量分析：从两台设备上采集到的电流谐波分析图表上可以看出逆变焊机的电流谐波含量为81.1%,可控硅焊机的电流谐波含量为25
2、.0%.结论：可控硅焊机的电流谐波小于比逆变焊机的电流谐波含量。二 空载时功率的比较在两台电焊机空载时，对两台电焊机的空载功率进行了功率的波形录波（见图2-1，图2-2） 图2-1 逆变焊机的空载功率波形 图2-2 可控硅焊机的空载功率波形分析：逆变电焊机在空载时的有功功率是0.19kw,可控硅电焊机在空载时的有功功率是1.26kw。即逆变焊机空载能耗远小于可控硅焊机。三 运行时功率的比较两台电焊机在运行状态时功率参数图表见下图（图3-1，图3-2） 图3-1 逆变焊机运行功率曲线图 图3-2 可控硅焊机运行功率曲线图根据图表分析和现场数据测试记录：逆变焊机运行输入功率为8.1 KW,;可控硅
3、电焊机的运行输入功率为9.3KW.四 可控硅电焊机和逆变电焊机的节能数据分析 以侧板焊工位为例，从电焊工艺工程师处得知：在一个焊接工艺周期中空载运行和满负荷运行的时长比例为55：45，则计算如下： 9.3KW451.26kw554.88kw 可控硅焊机平均功率8.1KW450.19kw553.75kw 逆变焊机平均功率（4.88kw3.75kw）/4.88kw=23% 节电率以上计算可知，使用逆变焊机可以比可控硅电焊机节约电量23%左右。如果以厂有200台可控硅焊机，每天运行20H，一年运行300天，每KW.H电费0.66元；用逆变焊机代替则年可节约：200*4.88KW*20H*300*23
4、%*0.66元=888940.8元 综上，逆变焊机具有巨大的推广价值，但目前制约逆变焊机推广和广泛应用的不是价格问题，也不是焊接性能；而是可靠性；Editors note: Judson Jones is a meteorologist, journalist and photographer. He has freelanced with CNN for four years, covering severe weather from tornadoes to typhoons. Follow him on Twitter: jnjonesjr (CNN) - I will always w
5、onder what it was like to huddle around a shortwave radio and through the crackling static from space hear the faint beeps of the worlds first satellite - Sputnik. I also missed watching Neil Armstrong step foot on the moon and the first space shuttle take off for the stars. Those events were way be
6、fore my time.As a kid, I was fascinated with what goes on in the sky, and when NASA pulled the plug on the shuttle program I was heartbroken. Yet the privatized space race has renewed my childhood dreams to reach for the stars.As a meteorologist, Ive still seen many important weather and space event
7、s, but right now, if you were sitting next to me, youd hear my foot tapping rapidly under my desk. Im anxious for the next one: a space capsule hanging from a crane in the New Mexico desert.Its like the set for a George Lucas movie floating to the edge of space.You and I will have the chance to watc
8、h a man take a leap into an unimaginable free fall from the edge of space - live.The (lack of) air up there Watch man jump from 96,000 feet 待添加的隐藏文字内容2Tuesday, I sat at work glued to the live stream of the Red Bull Stratos Mission. I watched the balloons positioned at different altitudes in the sky
9、to test the winds, knowing that if they would just line up in a vertical straight line we would be go for launch.I feel this mission was created for me because I am also a journalist and a photographer, but above all I live for taking a leap of faith - the feeling of pushing the envelope into unchar
10、ted territory.The guy who is going to do this, Felix Baumgartner, must have that same feeling, at a level I will never reach. However, it did not stop me from feeling his pain when a gust of swirling wind kicked up and twisted the partially filled balloon that would take him to the upper end of our
11、atmosphere. As soon as the 40-acre balloon, with skin no thicker than a dry cleaning bag, scraped the ground I knew it was over.How claustrophobia almost grounded supersonic skydiverWith each twist, you could see the wrinkles of disappointment on the face of the current record holder and capcom (cap
12、sule communications), Col. Joe Kittinger. He hung his head low in mission control as he told Baumgartner the disappointing news: Mission aborted.The supersonic descent could happen as early as Sunday.The weather plays an important role in this mission. Starting at the ground, conditions have to be v
13、ery calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. It will climb higher than the tip of Mount Everest (5.5 miles/8.8
14、5 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause), he can expect a lot of turbulence.The balloon will slowly drift to the edge of space at 120,000 feet
15、 (22.7 miles/36.53 kilometers). Here, Fearless Felix will unclip. He will roll back the door.Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth becomes the concrete bottom of a swimming pool that he wants to land on, but not too hard.
16、Still, hell be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end.Skydiver preps for the big jumpWhen he jumps, he is expected to reach the speed of sound - 690 mph (1,110 kph) - in less than 40 seconds.
17、Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him completely.If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes its not
18、 needed. Instead, he plans to deploy his 270-square-foot (25-square-meter) main chute at an altitude of around 5,000 feet (1,524 meters).In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses co
19、nsciousness at mach speeds.Even if everything goes as planned, it wont. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters).It might not be the moon, but Kittinger free fell from 102,800 feet in 1960 - at the dawn of an infamous space race that captured the hearts of many. Baumgartner will attempt to break that record, a feat that boggles the mind. This is one of those monumental moments I will always remember, because there is no way Id miss this.
