High-thrust reluctance linear motor

Abstract

The invention provides a high-thrust reluctance linear motor, which comprises a stator, a rotor, a coil and an air gap, wherein the stator is provided with a core; the rotor is provided with a core; the coil is arranged in a groove of the stator core or the rotor core and is arranged to generate magnetic field force to drive the rotor to carry out linear motion relative to the stator under the external current excitation; the air gap is arranged between the stator and the rotor and is parallel to a direction of motion of the rotor, wherein the air gap is distributed in a cross section vertical to the direction of motion of the rotor in a circumferential direction in a staggered tooth shaped manner. In the design of the linear motor of the invention, the air gap is parallel to the direction of motion of the rotor and extends along a direction vertical to the direction of motion, so that the circumferential length vertical to the direction of motion of the air gap is increased, and the coupling area of the stator and the rotor is increased to be helpful for increasing the thrust.

Description

technical field [0001] The invention relates to the technical field of linear motors, in particular to a large-thrust reluctance linear motor. Background technique [0002] Linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. Linear motors are generally considered to be a structural deformation of rotary motors. It can be seen as a rotary motor that is cut along its radial direction and then flattened to evolve. With the rapid development of automatic control technology and microcomputers, higher requirements are put forward for the positioning accuracy of various automatic control systems. The device is far from meeting the requirements of modern control systems. In addition, the linear motor itself has the advantages of simple structure, high positioning accuracy, fast response, and high sensitivity. Many countries in the world are researching, developing and appl...

AI Technical Summary

Problems solved by technology

However, the current linear motors have the disadvantages of low thrust density and low air gap flux density, which limit the application of linear motors.

[0004] like figure 1 , figure 2 The cylindrical linear motor and the square linear motor shown have a cylindrical air gap between the stator (fixed part) and the mover (movable part), and the air gap is parallel to the direction of motion. When the armature winding of the stator When the current is large, it is easy to cause defects such as saturation of the magnetic circuit, distortion of the air gap flux density, and increase in iron loss, which limits the maximum overload capacity and thrust density of the motor

Images