No brush No ring starter is to conquer the default of the rings、carbon brush、and complex starting sets on winging asynchronous motor, and is an equipment to reserve the advantage that small current and large torque of winging motor. JR、JZR、YR、YZR three phase winging stator ac asynchronous motor who use the starter of resistance、reactor、adjustable rheostat frequency sensitive rheostat、 liquild resistance starter、soft-starter all can choose “No Brush and no ring to stead.
No brush No ring starter remove the traditional 、complicated、multiconduction component starting equipment. it is easy to operate and install, less repairing expense. the advantage is: to keep the original operation without rings、carbon brush、brush box、brush box shell、short circuit ring and ajustable rheostat frequency sensitive rheostat on secondary loop system AC connector and time relay.
The principle of starter is to use the current frequency of stator fz reduce when stator speed risingfz=f1xS, when the speed of stator rise 0 to rated speed ne, current frequency of stator from 50hz down to 1-3hz. of starter zp=rp+jxp, the size of iron loss rp is proportional to frequency square. with the reduction of fz, rp will go down, reactance xp=ωLp, xp will reduce. when the starting finish, sf1 is very small, zp will go down to nearly zero, so when starting, it not only limit the current, but also improve power factor and torque, which is an ideal starting equipment.
It is the same as WZR No Brush self-controlled motor soft starter. There is 2 kind of out-head line of motor stator: 6 out-head line of more than 50KW motor stator(A-A、B-B、C-C). 3 out- head line of less than 50kw of stator. the starter also be designed 6-3 binding post according to power. after finishing the installation, pls connect the line to corresponding b of binding post.
