3HAC157540-004马达电机可议价

3HAC157540-004马达电机可议价

3HAC157540-004马达电机可议价

3HAC157540-004马达电机可议价

3HAC157540-004马达电机参数

3HAC157540-004马达电机价格

3HAC157540-004马达电机数据

3HAC157540-004由于电机电枢回路电阻和电感都较小，而转动体具有·定的机械惯性，因此当电机接通电源后，起动的开始阶段电枢转速以及相应的反电动势很小，起动电流很大。·大可达额定电流的15～20倍。

3HAC157540-004这一电流会使电网受到扰动、机组受到机械冲击、换向器发生火花。因此直接合闸起动只适用于功率不大于4千瓦的电动机（起动电流为额定电流的6～8倍）。

3HAC157540-004为了限制起动电流，常在电枢回路内串入专门设计的可变电阻，其原理接线见图1。在起动过程中随着转速的不断升高及时逐级将各分段电阻短接，使起动电流限制在某一允许值以内。这种起动方法称为串电阻起动，非常简单，设备轻便，广泛应用于各种中小型直流电动机中。但由于起动过程中能量消耗大，不适于经常起动的电机和中、大型直流电动机。但对于某些特殊需要，例如城市电车虽经常起动，为了简化设备，减轻重量和操作维修方便，通常采用串电阻起动方法。

3HAC157540-004对容量较大的直流电动机，通常采用降电压起动。即由单独的可调压直流电源对电机电枢供电，控制电源电压既可使电机平滑起动，又能实现调速。此种方法电源设备比较复杂。

25B-D6P0N114 2个

SDB/COMPACT7M2-2BB2 1个

3BHE028915R0101 PC D237 A101 2个

3BHE023584R2441 PP D113 24-110110 1个

3BHE014185R0001 UU D148 AE01 1个

3BHE014185R0002 UU D148 AE02 1个

3BSE013231R1 TU811V1  4个

3BSE013230R1 TU810V1  6个

3BSE008508R1 DI810     2个

3BSE008516R1 AI810      2个

3BSE008552R1 DI811    2个

3BSE008514R1 DO820    4个

3BSE013208R1 TB820V2  2个

TSXMC70E324   1 

TSXSUP702   4

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3BHE028915R0101 PC D237 A101 2个

3BHE023584R2441 PP D113 24-110110 1个

3BHE014185R0001 UU D148 AE01 1个

3BHE014185R0002 UU D148 AE02 1个

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