1. Application Background
1.1 The status prior to innovation
There was one set of PF600 × 900 jaw crusher at No. 2 workshop of the mineral processing factory of Guangdong
Dading Mining Industry Co., Ltd., equipped with an outdated motor with a rated power of 75KW, a rated voltage of 380V;
a rated current of 149A and a rated speed of 735r/min. It is
proved by measuring that it operated at a low current with a low
efficiency, serious fluctuation and waste in electric power.