Embedded magnetic path structure of high-performance permanent-magnet synchronous servo motor rotor

Abstract

The invention discloses an embedded magnetic path structure of a high-performance permanent-magnet synchronous servo motor rotor. The embedded magnetic path structure comprises a rotor punching sheet,a stator punching sheet and a magnetic steel assembly, wherein the stator punching sheet is arranged at the periphery of the rotor punching sheet, the magnetic steel assembly is arranged in the rotorpunching sheet, annular vacancy is reserved between the rotor punching sheet and the stator punching sheet, the rotor punching sheet comprises an annular rotor iron core and a plurality of hole sites, the plurality of hole sites are arranged at the periphery of the rotor iron core at equal distance, the magnetic steel assembly comprises magnetic steel, a magnetic isolation bridge and a rotor ironcore protruding part, the magnetic steel is arranged in the hole sites, the magnetic isolation bridge is arranged between adjacent hole sites, the rotor iron core protruding part is arranged betweenthe magnetic steel and the vacancy, right-angle parts are respectively arranged at two ends of an inner site of the magnetic steel, inclination parts are respectively arranged at two ends of an outerside of the magnetic steel, connection positions of the inclination parts and the right-angle parts are space parts of the hole sites, the magnetic isolation bridge comprises a first step part and a second step part, the first step part is arranged between the right-angle parts of adjacent magnetic steel, and the second step part is arranged between the space parts at adjacent sites. By the embedded magnetic path structure, the permanent-magnet synchronous servo motor magnetic path has the advantages of high reliability, high power density, wide speed regulation range, high efficiency and thelike.

Description

technical field [0001] The invention belongs to the technical field of servo motors, in particular to a high-performance permanent magnet synchronous servo motor rotor embedded magnetic circuit structure. Background technique [0002] Most of the magnetic circuit of the general servo permanent magnet synchronous motor adopts a distributed winding structure, and adopts a magnetic circuit design with multi-slot pole matching. Copper coils are wound on the stator laminations to cooperate with the rotor laminations. The inner surface of the rare earth permanent magnet steel is attached to the rotor. On the laminations, a stainless steel sleeve structure is added outside. The disadvantages of this structure are: low efficiency, low power density, narrow speed range, and high temperature of the magnetic steel. The use and application requirements of permanent magnet synchronous servo motors are becoming more and more stringent. Under the same power factor, the volume and weight of...

AI Technical Summary

Problems solved by technology

[0002] Most of the magnetic circuit of the general servo permanent magnet synchronous motor adopts a distributed winding structure, and adopts a magnetic circuit design with multi-slot pole matching. Copper coils are wound on the stator laminations to cooperate with the rotor laminations. The inner surface of the rare earth permanent magnet steel is attached to the rotor. On the laminations, the structure of stainless steel sle

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