Magnetism gathering type direct-driven permanent magnet motor

Abstract

The invention discloses a magnetism gathering type direct-drive permanent magnet motor which mainly structurally comprises a rotor and a stator and can be a linear motor or a rotary motor. The motor is mainly characterized in that a plurality of permanent magnets in the rotor iron core and the stator iron core 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 magnetism gathering effect of the plurality of permanent magnets is remarkable, and a relatively high permanent magnetic field utilization rate and a relatively small magnetic leakage coefficient are obtained; and therefore, the thrust density is obviously increased. The magnetism gathering type direct-drive permanent magnet 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 direct-drive permanent magnet motor. Background technique [0002] This application claims the priority of citing the following patent: a magnetism-concentrating type non-magnetic track linear motor (2021100157351). [0003] 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 becom...

AI Technical Summary

Problems solved by technology

[0005] (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

[0006] (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 in the production process of the stator, which further increases the cost

[0007] (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 using shielding covers, organ covers and other dust-proof measures, this will undoubtedly increase the cost of the motor

[0008] (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 the surrounding electronic components, resulting in limited application in the precision detection field of the 3C industry

[0009] (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

Images