High-thrust permanent magnet direct drive linear electric motor

Abstract

The invention relates to a high-thrust permanent magnet direct drive linear electric motor, comprising a motor primary and a motor secondary, wherein the motor primary comprises a primary iron core (1) with a slot, an armature winding (2), primary pole shoes (3) and permanent magnets (4), wherein the armature winding (2) is embedded into the slot of the primary iron core (1); the permanent magnets (4) are arranged on the surfaces of the primary pole shoes (3); the motor secondary comprises a secondary iron core (6) and secondary salient poles (7); an air gap (5) exists between the motor primary and the motor secondary; and the motor primary is fixed, and the motor secondary linearly moves along with the motion direction of a motor. The motor comprises a unilateral flat-plate structure, a bilateral flat-plate structure, and a cylindrical structure. In the high-thrust permanent magnet direct drive linear electric motor, the special structures of the motor are utilized to modulate the air gap reluctance distribution of the motor. When the motor is in operation, the movement velocity of a permanent magnetic flux in the motor primary is multiplied of that of a permanent magnetic flux in the motor secondary, thus realizing the speed-raising effect. The high-thrust permanent magnet direct drive linear electric motor is applied to low-speed direct drive application occasions, and has the characteristics of high power density, large rated thrust and the like.

Description

technical field [0001] The invention relates to a high-thrust permanent magnet linear motor, in particular to a direct-drive permanent magnet motor suitable for low-speed occasions. The invention relates to the fields of electrician and motor. Background technique [0002] According to the principle of motor design, when the rated power is determined, the higher the moving speed of the mover, the smaller the volume, weight and manufacturing cost of the motor. In many low-speed occasions such as wave power generation and rail transit drive, it is usually necessary to use bulky gear boxes and other mechanical devices for variable speed drive, and use "rotation-linear" conversion devices to change the motion form to match the high-speed rotation of the motor and work. The low-speed linear motion required by the situation can increase the power density of the motor body and reduce the manufacturing cost of the motor. The use of a large number of mechanical devices will inevitab...

AI Technical Summary

Problems solved by technology

However, due to the low running speed of the direct-drive linear motor mover, usually the traditional direct-drive linear motor has the characteristics of large size, large number of primary and secondary pole pairs, etc., which brings great difficulties to the manufacture and installation of the motor, and the manufacturing cost higher

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