Permanent magnet linear synchronous motor system with low thrust fluctuation and parameter design method of system

Abstract

The invention relates to a permanent magnet linear synchronous motor system with low thrust fluctuation and a parameter design method of the system, and belongs to the technical field of permanent magnet linear synchronous motors. The system is composed of a permanent magnet linear synchronous motor primary part, a permanent magnet linear synchronous motor secondary part, a compensation block and a primary platform, wherein the compensation block is composed of a multi-tooth iron core; the number of teeth can be determined by polar distance of a permanent magnet linear synchronous motor; the tooth length and an air gap can be determined according to the amplitude of detent force of the permanent magnet linear synchronous motor; the distance between the compensation block and a primary iron core of the permanent magnet linear synchronous motor is determined by phase of detent force of the permanent magnet linear synchronous motor; and the compensation block and the primary part are mounted on the primary platform. According to the amplitude and the phase of the detent force of the permanent magnet linear synchronous motor primary part, the compensation block is designed, the amplitude of the detent force of the compensation block and that of the primary part are equal, the phase difference is Pi, and the resultant force of detent force of both is 0, as a result, the purpose of detent force compensation is realized.

Description

technical field [0001] The invention relates to a permanent magnet synchronous linear motor system with low thrust fluctuation and a parameter design method thereof, belonging to the technical field of permanent magnet synchronous linear motors. Background technique [0002] Permanent magnet synchronous linear motors use high-energy permanent magnets (such as permanent magnets made of NdFeB materials), which have the characteristics of high thrust, small electrical time constant, and fast response. It can directly convert electrical energy into linear motion without any intermediate conversion mechanism. It has the advantages of simple structure, non-contact operation, low noise, high speed and precision, simple maintenance, and high reliability. At present, various linear motors have been used in electronic manufacturing equipment. (such as high-speed placement machines, micro-encapsulation platforms), high-speed and high-precision CNC equipment (such as high-speed machinin...

AI Technical Summary

Problems solved by technology

[0004] The thrust fluctuation of permanent magnet synchronous linear motor is one of the main defects in its application, because the thrust fluctuation is the cause of motor vibration and noise, especially at low speed operation, it may also cause resonance, thereby deteriorating its servo operation characteristics

In the design of linear motors, reducing thrust fluctuations is one of the main goals. Commonly used methods include: structural design of the linear motor body and optimization of parameters, such as adding side teeth to the primary iron core and designing different side teeth shapes , Optimizing the length of the primary iron core, but these two technologies can only reduce the magnetic resistance to a certain extent, and cannot completely eliminate the influence of magnetic resistance

Images