Novel reverse salient pole permanent magnet synchronous motor rotor structure capable of controlling magnetic flux leakage

Abstract

The invention discloses a novel reverse salient pole permanent magnet synchronous motor rotor structure capable of controlling magnetic flux leakage. Belongs to the technical field of permanent magnet motors and comprises a rotor core and a rotating shaft. The permanent magnet mounting groove comprises two linear permanent magnet structures and a double-layer V-shaped permanent magnet structure with a magnetic isolation bridge; six parallel magnetic barriers with special shapes are arranged in the double-layer V-shaped permanent magnet structure with the magnetic isolation bridge; a magnetic bridge is added on the permanent magnet; ndFe35 is adopted for the linear permanent magnet structure, SmCo24 is adopted for the double-layer V-shaped permanent magnet structure with the magnetic isolation bridge, and the torque pulsation is reduced through the mixed permanent magnet material; an arc-shaped magnetic barrier and a fan-shaped magnetic barrier are arranged on the q axis of the rotor to form two magnetic flux leakage paths, so that a downstream path of q-axis magnetic flux in the rotor is blocked, and the q-axis inductance is reduced while the self magnetic flux leakage of the permanent magnet is reduced; according to the structure, the reverse salient pole characteristic and the magnetic leakage controllable characteristic are realized, so that the motor has the characteristics of high weak magnetic speed regulation capability, low demagnetization risk, high power density and the like.

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