PLC模块CX5120
变频器功率的选用
系统效率等于变频器效率与电动机效率的乘积,只有两者都处在较高的效率下工作时,则系统效率才较高。从效率角度出发,在选用变频器功率时,要注意以下几点:
PLC模块CX5120
大功率补偿型——净化型稳压器(含精密型稳压器)
它用补偿环节实现输出电压的稳定,易实现微机控制。
它的优点是抗干扰性能好,稳压精度高(≤±1%)、响应快(40~60ms)、电路简单、工作可靠。缺点是:带计算机,程控交换机等非线性负载时有低频振荡现象;输入侧电流失真度大,源功率因数较低;输出电压对输入电压有相移。对抗干扰功能要求较高的单位,在城市里应用为宜,计算机供电时,选用计算机总功率的2-3倍左右稳压器来使用。因具有稳压、抗干扰,响应速度快、价格适中等优点,所以应用广泛。
PLC模块CX5120
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 / Rétro / 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 Gráfica 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 Vídeo Tarjeta Gráfica 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 FüR 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