IC697CPU731

电动机使用工频电源驱动时，电压下降则电流增加；对于变频器驱动，如果频率下降时电压也下降，那么电流是否增加？ 频率下降（低速）时如果输出相同的功率则电流增加但在转矩的条件下电流几乎不变。采用变频器运转时，电机的起动电流、起动转矩怎样？ 采用变频器运转，随着电机的加速相应提高频率和电压，起动电流被限制在150%额定电流以下(根据机种不同，为125%~200%)。用工频电源直接起动时，起动电流为6~7倍，因此，将产生机械电气上的冲击。采用变频器传动可以平滑地起动(起动时间变长)。起动电流为额定电流的1.2~1.5倍，起动转矩为70%~120%额定转矩；对于带有转矩自动增强功能的变频器，起动转矩为100%以上，可以带全负载起动。

REXNORD STEEL SINGLE STRAND 2-1/2 IN PITCH 10FT LENGTH ROLLER CHAIN D264803

825448 DOUBLE STRANDS 1/2IN 10FT ROLLER CHAIN B267788

TSUBAKI RS60 3/4 IN 38-1/4 IN SINGLE STRAND RIVETED ROLLER CHAIN D503678

MORSE 40 D3 C-L RIVETED SINGLE STRAND 1/2 IN PITCH 8-1/2FT ROLLER CHAIN B270268

TSUBAKI 40SS-3 STAINESS TRIPLE STRANDS 1/2IN 120IN ROLLER CHAIN D242080

EBC 08B-2 DUPLEX RIVETED 1/2 IN 10FT DOUBLE STRANDS ROLLER CHAIN B381199

TYC CHR-14-2001 SINGLE STRAND 1/2 IN 19 IN ROLLER CHAIN D341811

DRIVES INCORPORATED 80 RIVETED SINGLE STRAND 1 IN 3-3/4FT ROLLER CHAIN B257327

REXNORD 100-3 1-1/4 IN 10FT TRIPLE STRANDS ROLLER CHAIN D446006

DIAMOND 60 EXTENDED PIN SINGLE STRAND 3/4 IN 10FT ROLLER CHAIN D233988

TSUBAKI SINGLE STRAND 1 IN 84 IN ROLLER CHAIN B282499

JEFFREY CHAIN C2050R SINGLE STRAND 1-1/4IN PITCH 10FT ROLLER CHAIN D335417

DAIDO KOGYO DID 35S 106 LINK ROLLER CHAIN 40IN LENGTH B376734

HITACHI C2060 SINGLE STRAND 1-1/2IN PITCH 17IN LONG ROLLER CHAIN D264822

TSUBAKI RF2040 1 IN 4-1/2FT SINGLE STRAND ROLLER CHAIN B381101

TSUBAKI RS60-1-RP RIVETED 3/4 IN 28 IN SINGLE STRAND ROLLER CHAIN B381354

TSUBAKI 2040SS 1 IN PITCH 35 IN SINGLE STRAND STAINLESS ROLLER CHAIN D434774

TSUBAKI RS60 EXTENED PIN SINGLE STRAND 1/4 IN 10FT ROLLER CHAIN D254969

REXNORD 40 DOUBLE STRANDS 3/8 IN 98 IN ROLLER CHAIN B253054

SYSTEM PLAST NG 1873 SS-K325 SIDEFLEXING 3/4 IN 10FT ROLLER CHAIN B247903

B-1SHA10 1/2 IN 10FT SINGLE STRAND ROLLER CHAIN B371748

TSUBAKI RF2080 2IN PITCH 25FT LENGTH SINGLE STRAND ROLLER CHAIN D386144

RENOLD 40A1X10FT 1/2IN PITCH 10FT LENGTH SINGLE STRAND ROLLER CHAIN D384660

TSUBAKI RS08B-3 1/2 IN 10FT TRIPLE STRAND ROLLER CHAIN B381135

TSUBAKI RF2040 PITCH 1 IN 10FT SINGLE STRAND ROLLER CHAIN D434772

HITACHI 1222088 80 N SINGLE STRAND 1IN PITCH 30IN LONG ROLLER CHAIN D324365

TSUBAKI RS 80-HP 1 IN 10FT SINGLE STRAND HOLLOW PIN ROLLER CHAIN D504194

LOT 2 TSUBAKI BL523 8800LBS DOUBLE STRANDS 5/8 IN 68 IN ROLLER CHAIN D305768

TSUBAKI RS60-LMC LAMBDA 3/4 IN 10FT ROLLER CHAIN D504351

REXNORD C2040 1 IN DOUBLE PITCH 10FT SINGLE STRAND ROLLER CHAIN D425354

IWIS 08B-1SS ELITE 1/2 IN PITCH 10FT STAINLESS SINGLE ROLLER CHAIN D445108

ANSI 35-1R STAINLESS 3/8 IN 10FT SINGLE STRAND RIVETED ROLLER CHAIN D517504

60 3/4 IN 10FT SINGLE STRAND COTTERED ROLLER CHAIN D513301

LANTECH 30009617 SINGLE STRAND 3/8IN PITCH 22IN LENGTH ROLLER CHAIN D308433

STOCK DRIVE PRODUCTS A 6M 7-50 1/2IN PITCH 10FT ROLLER CHAIN D218132

PLANET PRODUCTS 4876-523 BUCKET 8IN X 10FT ROLLER CHAIN D210903

NATIONAL 35-1RSS 3/8 IN 10FT STAINLESS RIVETED ROLLER CHAIN D517491

STOCK DRIVE PRODUCTS A 6M 7-25ACE 1/4 IN PITCH 30FT ROLLER CHAIN D437113

TSUBAKI RS35RP SINGLE STRAND 10FT ROLLER CHAIN B291951

DIAMOND 470 RIVETED 1-1/4 IN 9-3/4FT SINGLE STRAND ROLLER CHAIN D433571

TSUBAKI RS40-NP-3-RP 1/2IN PITCH 10FT TRIPLE STRANDS ROLLER CHAIN D410624

TSUBAKI RS50 5/8 IN 10FT SINGLE STRAND RIVETED ROLLER CHAIN D503996

FMC TECH 4142.0232 CUP ASSEMBLY 2IN PITCH 6FT LENGTH ROLLER CHAIN D399123

HITACHI C2060HR STEEL PC-PLUS 1-1/2IN 120IN 10FT ROLLER CHAIN D253057

DIAMOND 40-3 1/2 IN 119-1/2 IN TRIPLE STRANDS RIVETED ROLLER CHAIN D503560

RENOLD 1/2 IN 25FT SINGLE STRAND ROLLER CHAIN B387390

WIPPERMANN STAINLESS 2IN PITCH 36FT SINGLE STRAND ROLLER CHAIN D416426

DIAMOND X-132044-010 C2080H 2 IN 10FT SINGLE RIVETED ROLLER CHAIN D503444

PEER C-2060HR SINGLE STRAND 1-1/2 IN 120 IN 10FT ROLLER CHAIN D245927

REXNORD 100 SINGLE STRAND 1-1/4 IN PITCH 10FT ROLLER CHAIN D342139

1-1/2 IN 50-1/2 IN SINGLE STRAND ROLLER CHAIN D449215