Permanent magnet auxiliary synchronous reluctance type motor rotor structure

Abstract

The invention relates to a permanent magnet auxiliary synchronous reluctance type motor rotor structure. A rotor core is provided with a plurality of U-shaped grooves, wherein the inner layer and theouter layer of each U-shaped groove are correspondingly arranged; each inner-layer U-shaped groove is divided into two L-shaped grooves through a reinforcing rib; every two outer-layer U-shaped grooves form a group and are arranged corresponding to one inner-layer U-shaped groove to form a magnetic space; and the inner U-shaped groove and the outer U-shaped groove are respectively provided with asecond permanent magnet and a first permanent magnet which are biased leftwards, so that the flux linkage of the rotor deviates, and the second permanent magnet of the inner U-shaped groove plays a role in magnetic conduction and corrects the deviation angle of the magnetic line of force passing through the first permanent magnet. The torque of the permanent magnet is improved, and the lengths andthe widths of the first permanent magnet and the second permanent magnet are the same, so that the utilization rate of the permanent magnets is increased, magnetic lines of force are gathered to theleft side, the offset of a rotor flux linkage is achieved, the reluctance torque is increased, and the material cost of the motor can be greatly reduced under the same torque requirement.

Description

technical field [0001] The present invention relates to the technical field of synchronous reluctance motors, in particular to a permanent magnet assisted synchronous reluctance motor rotor structure, in particular to a motor permanent magnet torque output by offsetting the permanent magnet flux linkage phase angle Electronic rotor structure. Background technique [0002] At present, synchronous reluctance motor has attracted attention in the field of AC speed regulation because of its low cost and good electromagnetic performance, but its torque density and efficiency are generally lower than those of permanent magnet synchronous motors of the same power level. Since the rotor of the synchronous reluctance motor has no excitation source, its excitation magnetic field comes from the stator armature current, and it works completely in an inductive state, so the power factor is smaller than that of the asynchronous motor and the permanent magnet synchronous motor. By insertin...

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Problems solved by technology

[0003] The torque density, efficiency and power factor of traditional synchronous reluctance motors are low, and because the synchronous reluctance motor rotor (generally referred to as TLA structure) adopts a multi-layer magnetic barrier structure, the magnetic bridge connection part bears a large centrifugal force , so the mechanical performance of the synchronous reluctance motor is poor, and it is generally used in a motor structure with a low speed and a stator outer diameter within 200mm

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