The present invention relates to a wound stator. The wound stator comprises: a stator and a plurality of wires. The stator comprises: an annular body and a plurality of radial grooves defined therein. The annular body has a plurality of separating posts protruding inwardly and radially from an inner circumference of the annular body. An end of each of the separating posts extends from its two sides to form a plurality of magnetic shoes. The plurality of radial grooves is defined between the separating posts. Each of the grooves has an opening defined between adjacent two of the plurality of magnetic shoes. The plurality of wires comprises: a first end, a second end, and a plurality of wave-shaped coils located between the first end and second end. Each wave-shaped coil is formed of straight portions and curved portions that alternate with each other.