6ES7331-7NF00-0AB0擴展模塊
電壓空間矢量(SVPWM)控制方式
它是以三相波形整體生成效果為前提,以逼近電機氣隙的理想圓形旋轉磁場軌跡為目的,一次生成三相調制波形,以內切多邊形逼近圓的方式進行控制的。經實踐使用後又有所改進,即引入頻率補償,能速度控制的誤差;通過反饋估算磁鏈幅值,低速時定子電阻的影響;將輸出電壓、電流閉環,以提高動態的精度和穩定度。但控制電路環節較多,且沒有引入轉矩的調節,所以係統性能沒有得到根本改善。
6ES7331-7NF00-0AB0擴展模塊
開關型直流穩壓電源
與線性穩壓電源不同的一類穩電源就是開關型直流穩壓電源,它的電路型式主要有單端反激式,單端正激式、半橋式、推挽式和全橋式。它和線性電源的根本區別在於它變壓器不工作在工頻而是工作在幾十千赫茲到幾兆赫茲。功能管不是工作在飽和就是截止區即開關狀態;開關電源因此而得名。
6ES7331-7NF00-0AB0擴展模塊
AGP 1x/2x Grafikkarte Matrox G200 8MB RAM S26316-D1114 Siemens Fujitsu OEM
AGP-Grafikkarte Matrox MGA G100 [220]
AGP-GRAFIKKARTE Matrox Millenium G450 16MB DualHead f徂r 2 Monitore 4xAGP+CD NUR:
Altura Completa Dual Dell 5M801/05M801 Matrox G550 32MB AGP Tarjeta Gr fica
Bureau AGP Graphiccard 3D Matrox G200 01K4422 Pour Windows 2000 7 XP Linux #G39
Bureau AGP Graphiccard 3D Matrox G200 01K4422 Win 2000 7 XP Vista Linux #G39
Classic Bureau Graphique 3D Matrox Mga G200 AGP Pour Windows 7 XP Vista Linux
Classic Office Gr fica 3D Matrox Mga G200 AGP Para Windows 7 XP Vista Linux
CLASSIC OFFICE GRAFIKKARTE 3D MATROX MGA G200 AGP FOR WINDOWS 7 XP VISTA LINUX
Classic Office Graphic Card 3D Matrox Mga G200 AGP For Windows 7 XP Vista Linux
Completo Altezza Doppio Dell 5M801/05M801 Matrox G550 32MB AGP Scheda Grafica
Completo Altezza Doppio Matrox G550 32MB AGP G55MADDA32DB Scheda Grafica
Doppio HP 246746-001 253275-001 Matrox G55MADDA32DB G550 32MB AGP Scheda Grafica
Double HP 246746-001 253275-001 Matrox G55MADDA32DB G550 32MB AGP Graphics Carte
Dual HP 246746-001 253275-001 Matrox G55MADDA32DB G550 32MB AGP Tarjeta Gr fica
FULL HEIGHT DUAL DELL 5M801 / 05M801 MATROX G550 32MB AGP GRAPHICS CARD
G2+/SDA/8BN/20 MATROX AGP VIDEO CARD 8MB
LAUTLOS AGP GRAPHICCARD 3D MATROX G200 G2 01K4422 WINDOWS 2000 7 XP LINUX G39 MM
Lautlose AGP Gr fica Mga Matrox G200 G2 01K4422 Windows 2000 7 XP Linux G39
LAUTLOSE AGP GRAFIKKARTE MGA MATROX G200 G2 01K4422 WINDOWS 2000 7 XP LINUX G39
Lautlose AGP Graphiccard 3D Matrox G200 G2 01K4422 Windows 2000 7 XP Linux G39
LAUTLOSE AGP GRAPHICCARD 3D MATROX G200 G2 01K4422 WINDOWS 2000 7 XP LINUX G39
Lautlose Office Gr fica 3D Matrox G200 AGP Para Windows 2000 7 XP Vista Linux
LAUTLOSE OFFICE GRAFIKKARTE 3D MATROX G200 AGP F徂R WINDOWS 2000 7 XP VISTA LINUX