Salient-pole type linear motor and reciprocal double piston compressor with salient-pole type linear motor

Abstract

A salient-pole type linear motor comprises a housing, a stator, a mover and coil units. The stator comprises a middle stator core and two side stator cores which have a plurality of magnetic poles on the inner peripheral surface of the stator. A plurality of coil units is wound around the plurality of magnetic poles. By generating a current that passes through the coil units sequentially, magnetic fields are produced about the magnetic poles and an attractive force is produced to enable a reciprocal motion of the mover by magnetic attraction. The salient-pole type linear motor further connects two compressor cylinders at both ends thereof for compressing gases or draining fluids so as to form a reciprocal double piston compressor with a salient-pole type linear motor.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit under 35 U.S.C. §119 of Taiwanese Patent Application No. 101128744, filed Aug. 9, 2012, which is hereby incorporated by reference in its entirety.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to a salient-pole type linear motor and a reciprocal double piston compressor with the salient-pole type linear motor, in particular to the salient-pole type linear motor that uses magnetic poles of a stator core arranged in front and behind a stator to drive coils on the front and rear magnetic poles to produced a magnetic field in order to attract a mover by the magnetic poles to perform a reciprocal linear motion along a central axial direction of the stator. Two compressor cylinders are further connected to both ends of the salient-pole type linear motor for compressing gases or draining fluids to form a reciprocal double piston compressor with the salient-pole type linear motor.[0...

AI Technical Summary

Benefits of technology

This patent is about a new type of motor that drives a compressor. The motor has a simple design and is very efficient, which means it can do a lot of work with less energy. The motor is made up of a stator with magnetic poles, and a coil that drives a moving part. This moving part is designed to move in a straight line back and forth, which makes it easier to drive the compressor. The motor is made using a material that has good magnetic properties, which makes it easier to make. Overall, this new motor design is much better than existing motors, which means it can be used more easily and with less energy.

Problems solved by technology

However, the conventional reciprocal compressors are limited by the total volume of the compressor, and the general cylindrical linear motor cannot meet the requirement for the high driving forces.

Although the reciprocal compressor driven by the conventional rotary motor has the advantages of low cost and a broad operation range, yet a lateral force may be produced during the compression process of the piston due to the linear motion of the piston driven by the rotary motor, and thus the wall of the cylinder may be worn out or damaged easily to indirectly causing the problems of noise, vibrations and high mechanical losses, so as to affect the overall system performance adversely.

Although the problem can be resolved by applying a lubricant, the lubricant may contaminate the compressed gas or fluid.

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