High speed flux reversal motor for power tool

Advantages of flux reversal motor (FRM) compared to other types of motors designed for high speed applications such as simplicity of the rotor, reliability and low cost are described in the paper. An angular grinder with high speed FRM has been developed and tested. Experimental data are provided. The efficiency of the developed angular grinder is higher than the serially produced angular grinders with induction and brush-type motors. The developed control block complies with the electromagnetic compatibility (EMC) requirement described in IEC 61000-3-2:2014.