6
所有家用电器在电机运行中,均产生不同程度的谐波电压和电流,使电动机在非正弦电压、电流下运行。高次谐波会引起电动机定子铜耗、转子铜(铝)耗、铁耗及附加损耗的增加,为显著的是转子铜(铝)耗。因为普通的交流异步电动机是以接近于基波频率所对应的同步转速旋转的,因此,高次谐波电压以较大的转差切割转子导条后,便会产生很大的转子损耗。除此之外,还需考虑因集肤效应所产生的附加铜耗。这些损耗都会使电动机额外发热,效率降低,输出功率减小,但如果使用变频电机,其能耗能减少20%-30%左右。
ABB变频电机谐波电磁噪声与震动更小
普通异步电动机由于电磁、机械、通风等因素所引起的震动和噪声变的更加复杂。变频电源中含有的各次时间谐波与电动机电磁部分的固有空间谐波相互干涉,形成电磁激振力。当电磁力波的频率和电动机机体的固有振动频率一致或接近时,将产生共振现象,从而加大噪声。由于电动机工作频率范围宽,转速变化范围大,电磁力波的频率很难避开电动机的各构件的固有震动频率。但是变频电机就可以有效解决这些问题。
ABB UNITROL 1000 AUTOMATIC VOLTAGE REGULATOR 3BHE005774R0003
ABB UNITROL 1000 AUTOMATIC VOLTAGE REGULATOR 3BHE005774R0003
ABB 3BHE039905R0101 LT C745 A101 Voltage Drive Crowbar Circuit Board 3E-4
ABB UNITROL 1000 AUTOMATIC VOLTAGE REGULATOR 3BHE005774R0003
Abb 3bhe039221r0101 PCB Tarjeta
ABB 3bhe024855r0101 Interfaccia Tavola
ABB 3bhe024855r0101 Interface Board
ABB 3BHE004573R0141 UFC760BE141 PC BOARD
ABB 3BHE009681R0101 3BHB013085R0001 GVC750BE101 5SHY3545L0009 IGCT MODULE
ABB 3BHE024577R010 PP C907 BE.
Abb 5SHY35L4510 3BHE014105R0001 5XSE02-138 Module
ABB drives control board 3BHE014070R0101 CCB-2
ABB 3BHE004573R0142 UFC760BE142 PC BOARD
Abb 3bhe039221r0101 pcb card
Abb unitrol 1000 voltage regulator 3bhe014557r6104
Abb 3bhe036290r0002 gate drive board gd c806 b02
ASEA BROWN BOVERI 3BHE018086P201 / 3BHE018086P201
ASEA BROWN BOVERI 3BHE033866P201 / 3BHE033866P201
ASEA BROWN BOVERI 3BHE024855R0101 / 3BHE024855R0101
ASEA BROWN BOVERI 3BHE024747R0101 / 3BHE024747R0101
ASEA BROWN BOVERI 3BHE021083R0103 / 3BHE021083R0103
ASEA BROWN BOVERI 3BHE032285R0102 / 3BHE032285R0102
ASEA BROWN BOVERI 3BHE021083R0101 / 3BHE021083R0101
ASEA BROWN BOVERI 3BHE021083R0102 / 3BHE021083R0102
ASEA BROWN BOVERI 3BHE033067R0102 / 3BHE033067R0102
ASEA BROWN BOVERI 3BHE033067R0101 / 3BHE033067R0101
ASEA BROWN BOVERI 3BHE036348R0101 / 3BHE036348R0101
ABB 3BHE039203R0101 5SXE12-0184 GVC736CE101 Module
ABB 3BHE024577R0101 INVERTER MODULE
ASEA BROWN BOVERI 3BHE022678R0105 / 3BHE022678R0105
ASEA BROWN BOVERI 3BHE028761R0101 / 3BHE028761R0101
ASEA BROWN BOVERI 3BHE005555R0101 / 3BHE005555R0101
ASEA BROWN BOVERI 3BHE033865R0101 / 3BHE033865R0101
ASEA BROWN BOVERI 3BHE004573R0142 / 3BHE004573R0142
ASEA BROWN BOVERI 3BHE036290R0004 / 3BHE036290R0004
ASEA BROWN BOVERI 3BHE039905R0101 / 3BHE039905R0101
ASEA BROWN BOVERI 3BHE036290R0001 / 3BHE036290R0001
ABB 3BHE037864R0106 BOARD
ASEA BROWN BOVERI 3BHE014311R0101 / 3BHE014311R0101
ASEA BROWN BOVERI 3BHE014658R0101 / 3BHE014658R0101
ASEA BROWN BOVERI 3BHE015619R0004 / 3BHE015619R0004
ASEA BROWN BOVERI 3BHE028767R0101 / 3BHE028767R0101
ASEA BROWN BOVERI 3BHE038368R0101 / 3BHE038368R0101
ASEA BROWN BOVERI 3BHE034854R0101 / 3BHE034854R0101
ASEA BROWN BOVERI 3BHE016428R0003 / 3BHE016428R0003
ASEA BROWN BOVERI 3BHE022678R0103 / 3BHE022678R0103
ASEA BROWN BOVERI 3BHE036130R0101 / 3BHE036130R0101
ABB 3BHE006373R0101 INVERTER MODULE
ASEA BROWN BOVERI 3BHE039221R0101 / 3BHE039221R0101
ASEA BROWN BOVERI 3BHE006414R0001 / 3BHE006414R0001
ABB 3BHE006373R0101 INVERTER MODULE
ABB 3BHE024577R0101 INVERTER MODULE
ABB 3BHE024577R0101, PP C907 BE, ACS2000 part, sn:0092 random, dφm
ASEA BROWN BOVERI 3BHE030485 / 3BHE030485 3BHE022293R0101 | ABB | PC D232 A Communications I/O Module
ASEA BROWN BOVERI 3BHE009017R0101 / 3BHE009017R0101
ASEA BROWN BOVERI 3BHE036131-P201 / 3BHE036131P201
ASEA BROWN BOVERI 3BHE037125-P106 / 3BHE037125P106
ASEA BROWN BOVERI 3BHE022678R0102 / 3BHE022678R0102
ASEA BROWN BOVERI 3BHE006805R0002 / 3BHE006805R0002
ASEA BROWN BOVERI 3BHE014659P201 / 3BHE014659P201
ASEA BROWN BOVERI 3BHE036131-P02 / 3BHE036131P02
ABB uns0868 Unitro 3bhe013940r0001
ASEA BROWN BOVERI 3BHE009017R0101 / 3BHE009017R0101
ASEA BROWN BOVERI 3BHE006412R0101 / 3BHE006412R0101
ASEA BROWN BOVERI 3BHE021083R0102 / 3BHE021083R0102
ASEA BROWN BOVERI 3BHE025883R0101 / 3BHE025883R0101
3BHE025093R0001 | ABB | Modbus Adapter Module, Fieldbus
ASEA BROWN BOVERI 3BHE033067R0101 / 3BHE033067R0101
ABB 3BHE022294R0101 3BHE020356R0101 GFD233A Module
ASEA BROWN BOVERI 3BHE027339R1002 / 3BHE027339R1002
ASEA BROWN BOVERI 3BHE036290R0002 / 3BHE036290R0002
Abb 3bhe024855r0101 interface board
ABB GFD212A 3BHE020356R0101 3BHE020357P201 Module
ABB UFC760BE1142 3BHE0Q45732 Module
ABB 3BHE033067R0103 GCC960C103 Module
Abb uns0868 unitrol 3bhe013940r0002
ABB 5SHY3545L0020 3BHE014105R0001 5SXE08-0166 Module
ABB 3bhe024855r0101 Interfaz Tabla
Abb 3bhe039221r0101 PCB Scheda
Abb uns0868 Unitrol 3bhe013940r0002
Abb 3bhe039221r0101 pcb card
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