140CRA31200適配器
變頻器是用於需要調速的地方，其輸出不但改變電壓而且同時改變頻率；軟起動器實際上是個調壓器，用於電機起動時，輸出只改變電壓並沒有改變頻率。變頻器具備所有軟起動器功能，但它的價格比軟起動器貴得多，結構也復雜得多。電動機軟起動器是運用串接於電源與被控電機之間的軟啟動器，控制其內部晶閘管的導通角，使電機輸入電壓從零以預設函數關係逐漸上升，直至啟動結束，賦予電機全電壓，即為軟啟動，在軟起動過程中，電機起動轉矩逐漸增加，轉速也逐漸增加
140CRA31200適配器
變頻器功率的選用
係統效率等於變頻器效率與電動機效率的乘積，只有兩者都處在較高的效率下工作時，則係統效率才較高。從效率角度出發，在選用變頻器功率時，要注意以下幾點：
140CRA31200適配器
Matrox AGP VGA Adapter GeForce 4 MX-440SE/64M (VGA, TV-out S-video) (class P)
Matrox G Proa / 8 G100A 8 MB AGP 3.3V PC Carte Graphique / R岢tro / Style Vintage
Matrox G Proa / 8 G100A 8 MB AGP 3.3V PC Graphics Card/Graphic Card
MATROX G PROA/8 G100A 8 MB AGP 3.3V PC Graphics Card/Grafikkarte Retro/Vintage
MATROX G+/PROA/8 G100A 8 MB AGP 3.3V PC Graphics Card/Grafikkarte Retro/Vintage
Matrox G100a/4 / OEM G100a/4bf/20 MGA-G100A Chip 4MB Sgram AGP Gr fica 790-01
Matrox G100a/4/OEM G100a/4bf/20 MGA-G100A Chip 4MB Sgram AGP Graphic Card 790-01
Matrox G100a/4/OEM G100a/4bf/20 MGA-G100A Chip 4MB Sgram Scheda Grafica AGP
Matrox Millennium 2 MGA-2164WA-B AGP 3.3V 4MB VGA Video Card Grafikkarte MIL2A/4
Matrox Millennium 2 MGA-2164WA-B AGP 3.3V 4MB VGA Video Card Graphics MIL2A/4
Matrox Millennium 2 MGA-2164WA-B AGP 3.3V 4MB VGA V岥deo Tarjeta Gr fica MIL2A/4
Matrox Millennium G200 8MB (G2DMILA/8D/OE2) AGP graphics card
Matrox Millennium Mga-mil/2 PCI 2MB Graphic Card 576 Video Board
Matrox Mystique Mga G200 2MB PCI Computer Video Card Vintage VGA IS-MGA-1064SG
Office AGP Graphiccard 3D Matrox G200 01K4422 For Windows 2000 7 XP Linux #G39
OFFICE AGP GRAPHICCARD 3D MATROX G200 01K4422 F徂R WINDOWS 2000 7 XP LINUX #G39
Office AGP Graphiccard 3D Matrox G200 01K4422 Win 2000 7 XP Vista Linux #G39
OFFICE AGP GRAPHICCARD 3D MATROX G200 01K4422 WIN 2000 7 XP VISTA LINUX #G39
Office AGP Graphiccard 3D Matrox G200 01K4422 Win 2000 7 XP Vista Linux #G39
Pleine Hauteur Double Dell 5M801/05M801 Matrox G550 32MB AGP Carte Graphique
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