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起重电磁铁广泛应用于冶金、铸造、起重运输等行业,吊运废钢、生铁锭及钢板等金属物料。老式控制器由几个直流接触器控制电磁铁的励磁和去磁电流,因起重电磁铁是直流大电感负载,电感达几亨到十几亨,电流数10Ａ,最大可达200Ａ左右,使直流接触器接通和断开这些大电感负载时,触头
Lifting electromagnets are widely used in metallurgy, casting, lifting and transportation industries, lifting scrap, pig iron ingot and steel and other metal materials. The old controller consists of several DC contactor control the excitation and demagnetization of the electromagnet, because the lifting electromagnet is a DC large inductive load, the inductance of several Heng to a dozen Heng, the current number 10A, up to 200A or so, so that DC contactor turns the contactor on and off when these large inductive loads are applied