Patent ID: 8669682

Claim:
A rotating electrical machine, comprising: a stator ( 10 ) equipped with stator windings; and a rotor ( 11 ) having a magnetic body, said rotor comprising a plurality of alternate North poles (Np) and South poles (Sp) formed from permanent magnets (PM) arranged according to an approximately radial configuration to aid flux concentration; said permanent magnets (PM) being housed in respective first slots (E 1 ) arranged in the magnetic body of said rotor ( 11 ); said rotor comprising at least, for each permanent magnet (PM), a defluxing magnetic circuit allowing the circulation of a defluxing magnetic flux, said defluxing magnetic circuit having a magnetic reluctance of said defluxing circuit (R f ) determined as a function of an internal magnetic reluctance of the magnet (R a ) of said permanent magnet (PM) such that a ratio (R f /R a ) of said magnetic reluctance of said defluxing circuit (R f ) to said internal magnetic reluctance of the magnet (R a ) is within a range of predetermined values of between approximately 0.3 and approximately 3 for substantially insuring said permanent magnet (PM) against a risk of demagnetization when a current having an intensity equal to that of a short-circuit current of said machine is injected into said stator windings so as to oppose the magnetic flux generated by said permanent magnets (PM).