描述
步进电机的动态力矩一下子很难确定，我们往往先确定电机的静力矩。静力矩选择的依据是电机工作的负载，而负载可分为惯性负载和摩擦负载二种。单一的惯性负载和单一的摩擦负载是不存在的。直接起动时（一般由低速）时二种负载均要考虑，加速起动时主要考虑惯性负载，恒速运行进只要考虑摩擦负载。一般情况下，静力矩应为摩擦负载的2-3倍内好，静力矩一旦选定，电机的机座及长度便能确定下来
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SQUARE D DTU324N 200 AMP DOUBLE THROW SAFTEY SWITCH
NORTEL DM1401096 CONTIVITY 1100 EXTRANET SWITCH 163092
YORK D1HG036N04046B 3T 50,000 ROOFTOP AIR CONDITIONER
WESTWARD 10 TON AIR ASSIST HYDRAULIC SERVICE JACK 61175
EAGLE PI-7710 30 GALLON SAFETY CABINET 159943
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BURNHAM G1-125ND1-L2 125,000 HEATING BOILER 20323
