Magnetic gathering type non-magnetic track linear motor

Abstract

The invention discloses a magnetic gathering type non-magnetic track linear motor. The main structure of the magnetic gathering type non-magnetic track linear motor comprises a rotor and a stator. The motor is mainly characterized in that a plurality of permanent magnets in an iron core of the rotor are mounted in a specifically designed mounting mode and magnetizing directions, and the rotor and the stator are assembled at specific relative positions, so that the magnetic gathering effect of the plurality of permanent magnets is remarkable, a relatively high permanent magnetic field utilization rate and a relatively small magnetic leakage coefficient are obtained, and the thrust density is obviously increased. The magnetism gathering type non-magnetic-track linear motor has the advantages of being high in thrust density, small in thrust fluctuation, low in cost, easy to machine and assemble, reliable in operation, easy to expand multiple modules and the like.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous linear motors, in particular to a magnetism-concentrating type non-magnet track linear motor. Background technique [0002] In recent years, with the rapid development of high-end machine tools, 3C industry, laser cutting, liquid crystal panel, and lithium battery industry, for high-speed, high-precision, and long-stroke linear travel applications, sliding linear machines based on screw or belt drive The motion system has been difficult to meet the needs of practical applications. Linear motors can directly generate linear motion based on the working principle of traditional rotary motors. They are suitable for working conditions such as long strokes, high precision, high dynamic response, and long life. They have become more and more popular in the market in recent years. [0003] At present, the mainstream solution of linear motor usually adopts permanent magnet linear moto...

AI Technical Summary

Problems solved by technology

[0004] (1) The price is extremely expensive: because the main components of permanent magnets are NdFeB or SmCo, which are rare earth materials, the cost is high and scarce, and the stator is covered with rare earth permanent magnets, which are extremely expensive when used in long-stroke occasions;

[0005] (2) The additional cost of installation and transportation is high: the permanent magnet will generate a strong magnetic field around it, and a special magnetic isolation shield is required during the production process of the stator, which further increases the cost;

[0006] (3) The life of the motor is short: the strong magnetic field on the stator will attract iron filings and dust into the motor when the motor is running, affecting the life of the motor

Although some manufacturers will take measures to prevent dust, such as dust-proof measures such as shielding covers and organ covers, this will undoubtedly increase the cost of the motor;

[0007] (4) Generate electromagnetic interference: the permanent magnet on the stator will generate a strong magnetic field around it, which will interfere with the normal operation of surrounding electronic components, resulting in limited application in the field of precision detection in the 3C industry;

[0008] (5) High potential safety hazard: If the powerful permanent magnet is not properly operated during the handling, installation and use of the motor, it will cause workers to be injured

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