Patent ID: 8008823

Claim:
An electric machinery, comprising: a coil-less stator having a permanent magnet only magnetic pole (PM magnetic pole) wrapped by a magnetic pole or a magnetic circuit; an armature having a conductor or conductive coil that carries a current to produce a magnetic flux; wherein the PM magnetic pole is wrapped by forming one or more than one side of the magnetic circuits made of permeable material between two magnetic poles of different polarities of the PM magnetic pole after the combination of the magnetic pole and the magnetic circuit, whereof the magnetic circuit covering across the two magnetic poles of different polarities on the PM magnetic poles constitute a permeable magnetic circuit on at least one side or wrapped overall for passing through partial magnetic line of force on the PM magnetic pole while the PM magnetic pole remains to form partial strength of the magnetic field on the pole-face of the magnetic pole, such that when the PM magnetic pole is inversely excited in the course of operation, two magnetic poles of different polarities on the PM magnetic pole keeps closed magnetic circuit to maintain the magnetic line of force so as to enhance the property to against inverse excitation.