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在制茶机电设备中,单向和顺、逆运转的小型三相交流异步电动机使用较多,有些场合需要准确定点,快速制动。现将经过改进,并通过试验成功的两种能耗制动线路作一介绍。 (一)单向运转能耗制动电路 l.原理:C_1吸合后,C被充电,作制动准备。C_1释放,C就对J放电而吸合,并使C_2也吸合,通过C_2触头流过直流制动电流而制动(图1)。 2.元件选择。 C:22uf～33uf即可,耐压大于B的次级电压1.5倍。 J:121型高灵敏继电器,根据放电时间,即制动时间和吸合电流而定。
In tea mechanical and electrical equipment, one-way shun, reverse operation of small three-phase AC induction motor to use more, some occasions need accurate positioning, rapid braking. Now will be improved, and through the successful trial of two energy braking circuit for an introduction. (A) one-way operation of energy-consuming brake circuit l. Principle: C_1 after suction, C is charged for brake preparation. C 1 release, C on the J discharge and pull, and C_2 also pull through the C_2 contact flow through the DC brake current and brake (Figure 1). 2 component selection. C: 22uf ~ 33uf can, pressure greater than B secondary voltage 1.5 times. J: 121 type high sensitive relay, according to the discharge time, that is, braking time and pull current.