變頻器產(chǎn)業(yè)得到飛速發(fā)展，變頻器產(chǎn)品的產(chǎn)業(yè)化規(guī)模日趨壯大。交流變頻器自20世紀60年代問世后，80年代就在工業(yè)化廣泛使用，進入90年代，隨著人們節(jié)能環(huán)保意識的加強，變頻器的應用越來越普及。

廈門岳航計算機工程有限公司

聯(lián)系人：李素云

企業(yè)QQ：2851195446，2851195466

手機：18965423501

座機：0592-5165501

變頻器節(jié)能主要表現(xiàn)在風機、水泵的應用上。為了保證生產(chǎn)的可靠性，各種生產(chǎn)機械在設計配用動力驅(qū)動時，都留有一定的富余量。當電機不能在滿負荷下運行時，除達到動力驅(qū)動要求外，多余的力矩增加了有功功率的消耗，造成電能的浪費。

同時，風機、泵在使用變頻調(diào)速后，可以控制電機的啟動電流，降低電力線路電壓波動，啟動時需要的功率更低，具有可控的加速功能、運行速度和轉(zhuǎn)矩極限，具備減速停車、自由停車、減速停車+直流制動等受控的停止方式，能大幅降低能耗，節(jié)約了齒輪箱等機械傳動部件。

3 變頻器在實驗室應用時帶來的問題

隨著出口產(chǎn)品的增長，各地電壓等級、頻率各異，其它和地區(qū)的工頻以60hz居多，電壓又有400v、415v的區(qū)別，由于對變頻器技術(shù)的相關知識掌握得較少，對變頻器電氣特性的測定方法掌握得不夠全面，開始我們采用變頻器提供所需的60hz電源，在測試過程中發(fā)現(xiàn)了諸多問題：

(1)風機轉(zhuǎn)速和電壓變化。輸出60hz電源時，電機轉(zhuǎn)速并不是50hz時的1.2倍，將輸入側(cè)的電壓調(diào)整為380v時，輸出側(cè)的電壓和輸入測的電壓不同，差異較大。這是因為變頻器是采用逆變技術(shù)的，通用的變頻器都是變頻變壓(vvvf)，頻率發(fā)生變化，電壓也會成正比發(fā)生變化，如圖1所示。

Mettler-Toledo 17780747C Excellence Plus XP Balance Operating Instructions

Mettler Toledo 11781077 Excellence Plus XP Balance Operating Instructions Part 2

New in Box Mettler Toledo XP8002S Precision Balance 8100g Capacity 0.01g

Dover TI-14 Flexo Tension Indicator, Range: 0-500

Lot of 2 Camfil MGA-305x457x110 H14 Air Filter 99.9992% - 99.9994% Eff

New Lot of 2 Camfil MGA-305x457x110 H14 Air Filter 99.9991% - 99.9992% Eff

New Lot of 2 Camfil MGA-305x457x110 H14 Air Filter 99.99% - 99.9992% Efficiency

New Meissner Pall R1F020 Filter 10" x 2.5"

Mettler Toledo XP205 Analytical Balance 220g Weight Capacity *See Details*

Sartorius YDP03-0CE Data Printer

Sartorius YDP20-0CE Data Printer

Mettler Toledo LC-P45 Printer for Laboratory Balance RS-232C LocalCAN 115VAC

Mettler Toledo BBA462-15ST Precision Counting Scale 30lb (missing front feet)

Mettler Toledo XP8002S Precision Balance, 8100g max, d=0.01g, 170x205mm Platform

Sellstrom Wall Mounted Spill Control Station 15" x 30.375" x 9.5" w/Contents

AND HA-200A Analytical Balance with Automatic Door *For Parts Only*

AND HA-200A Analytical Balance with Automatic Door 120VAC 0.5A *No Power Supply*

AND HA-200A Analytical Balance with Automatic Door *Discolored, No Power Supply*

Keystone 08P00405HE 0.1-Micron Polypropylene Filter 2.700"-OD x 4.910"-L

New Box of 300 Cleanroom Nylon Bags 3"x8.5" 0.002" Thick

New Lot of 12 Water Filters 29mm-ID 62mm-OD 29-7/8" Long

Titan Tool 1-6.5 Inspection Microscope Zoom Objective Lens 4 3/8" Length

Nikon 5x Objective Lens for Nikon MM-200/400/800 Measuring Microscopes *Damaged*

Lot of 5 Aerostar 16X25X4 Pleated Filters

Mcleod Russel N-H13-V40-305-vz Ultrafilter 305mm x 610mm x 292mm, 2000m^3/h Flow

Mcleod Russel N-H13-V40-305-vz Ultrafilter 305mm x 610mm x 292mm, See Details

New Parker PAB002-30FE-DO Filter Cartridge, 0.2 Micron, 2-11/16" OD, 30" Long

Julabo TW12 Digital Water Bath 20-99.9C +/-0.1C 115V 1100W

MicroAir MT800 Ambient Filtration Unit with Filter and 5" Duct 120VAC

Nupro SS-2TF4-60 Particulate Filter, 60 Micron, 1/8" NPT

MGHE 30" Ceramic Filter, 3 Micron

MGHE 30" Ceramic Filter, 1 Micron330106-05-30-05-02-00

330106-05-30-10-02-05

330130-040-00-00

330130-040-01-00

330130-045-00-00

9563-810

9853-610

DSAI110 57120001-DP

M3575R-H33BF

M68CPU CPU

MC-4/11/01/400

S-D4006-D

S-D4006-D S-D4006

S-D4008-A S-D4008

SM 25/50-TCT DC 560V 25A 06231-103

SR 469 469-P5-HI-A20

1336F-BRF200-AN-EN

1336F-BRF200-AN-EN

BS206 BIO420 BIO420/00

BS204 BIO246 BIO246/00

BS205 BIO413 BIO413/00

1336-BDB-SP6A

34-6549-3946G3

6AV6542-0DA10-0AX0

BS207 BIO459 BIO459/01

DIO32-C

Sorvall Instruments RC5C Refrigerated Centrifuge 21,000 RPM 208VAC w/ 3 Rotors

New Parker AP012-40AV-TC Pleated Filter Cartridge

PEPLYN PLUS ZCPP2-1-5E Cartridge Filter 1.5 Micron

Thermotron S-1.2 Mini Max Environmental Chamber 120VAC 15A *Does not Cool*

Lab Line Ultra 3497M-3 Ultra Clean Clean Room Oven 208VAC 14.9A 3100W 2.8cuft

Alco EK-759S Liquid Line Filter Drier, 1-1/8" Solder

Gallenkamp INR-401-030Q Orbital Incubator & Cooler with Illumination *For Parts*

Sono-Tek 10-00075 06-05234 "AccuMist" Tubing