A direct current (DC) electric motor assembly with a closed type overlap stator winding which is commutated with a timed commutating sequence that is capable of generating a stator rotating magnetic field. The coil overlap of the winding and a timed commutation sequence are such that the current in each slot of the ...

Disclosed is a sealing cover, which is suitable for sealing an opening of a container, comprising an extrusion lid and a flexible sealing ring, wherein the container has an opening, the extrusion lid comprises an outer cover, an inner shield cover, a screw rod and a knob, the outer cover covers the opening, and the ...