主电路是给异步电动机提供调压调频电源的电力变换部分，变频器的主电路大体上可分为两类：电压型是将电压源的直流变换为交流的变频器，直流回路的滤波是电容。郑工199 59 281761
D&D PowerDrive 38V5000 Banded V Belt
D&D PowerDrive 3-B133 Banded V Belt
D&D PowerDrive 3VX627/06 Banded Belt 3/8 x 62.7in OC 6 Band
D&D PowerDrive 4/3V1320 Banded V Belt
D&D PowerDrive 4/D390 Banded V Belt
D&D PowerDrive 404MXL787 Timing Belt
D&D PowerDrive 445H1771 Timing Belt
D&D PowerDrive 4R8V3150 Banded V Belt
D&D PowerDrive 5-3VX670 Banded Cogged V Belt
D&D PowerDrive 570L30 Poly V-belt Vbelt
D&D PowerDrive 580K32 Poly V-belt Vbelt
D&D PowerDrive 5R5V3000 Banded V Belt
D&D PowerDrive 5V2650/05 Banded Belt 5/8 x 265in OC 5 Band
D&D PowerDrive 5V975/09 Banded Belt 5/8 x 97.5in OC 9 Band
D&D PowerDrive 5VX1160/04 Banded Belt 5/8 x 116in OC 4 Band
D&D PowerDrive 5VX813/02 Banded Belt 5/8 x 81.3in OC 2 Band
D&D PowerDrive 6/5V2240 Banded V Belt
D&D PowerDrive 600L29 Poly V-belt Vbelt
D&D PowerDrive 633-3M-360 Timing Belt
D&D PowerDrive 6-5V850 Banded V Belt
D&D PowerDrive 7/C255 Banded V Belt
D&D PowerDrive 738K30 Poly V-belt Vbelt
D&D PowerDrive 7-5V1900 Banded V Belt
D&D PowerDrive 799K23 Poly V-belt Vbelt
D&D PowerDrive 7-B54 Banded V Belt
D&D PowerDrive 8/B60 Banded V Belt
D&D PowerDrive 8V2600/03 Banded Belt 1 x 260in OC 3 Band
D&D PowerDrive 8V2850/09 Banded Belt 1 x 285in OC 9 Band
D&D PowerDrive 9/8V3150 Banded V Belt
D&D PowerDrive 900M3 Poly V-belt Vbelt
D&D PowerDrive 905K28 Poly V-belt Vbelt
D&D PowerDrive 910K24 Poly V-belt Vbelt
D&D PowerDrive 930K28 Poly V-belt Vbelt
D&D PowerDrive 9-8V2240 Banded V Belt
D&D PowerDrive A67/08 Banded Belt 1/2 x 69in OC 8 Band
D&D PowerDrive B131/12 Banded V-belt Vbelt
D&D PowerDrive B136/07 Banded Belt 21/32 x 139in OC 7 Band
D&D PowerDrive BK106/08 Banded V-belt Vbelt Heavy Duty Aramid
D&D PowerDrive BX108/07 Banded Belt 21/32 x 111in OC 7 Band