Linear motor and compressor

Abstract

The invention discloses a linear motor and a compressor using the same, and belongs to the related technical fields of a motor. The linear motor includes a reciprocating mover and a plurality of pairs of stators at the outside of the mover, wherein the stators include stator cores; the mover is provided with at least two magnets at intervals; the adjacent two magnets are opposite in the polarity at the same side; and the interval, between the two adjacent magnets, corresponding to the stator cores, is embedded with a magnetic isolating piece. By embedding the magnetic isolating piece at the interval, between the two adjacent magnets, corresponding to the stator cores, the linear motor can effectively reduce magnetic leakage between the two magnets, can effectively reduce stator iron loss, can reduce the motor weight, and can save the motor cost. By setting an auxiliary magnet on the magnetic isolating piece, the linear motor can further reduce magnetic leakage between the two magnets, can improve the output capability of the unit current of the motor, and can fully utilize and display the performance of the magnets. Besides, the auxiliary magnet can be used as a balancing mover, so that the linear motor can effectively reduce mechanical loss and mechanical wearing caused by lateral deviation of the mover.

Description

technical field [0001] The invention relates to the field related to motors, in particular to a linear motor and a compressor. Background technique [0002] At present, linear oscillating motors for linear compressors mostly use C-type, E-type, C-type rings, etc. For the above-mentioned linear motors, because the overlapping direction of the stator teeth is relatively wide, two or more pieces are usually installed on the mover. The magnets are arranged at equal intervals to ensure the performance of the linear motor. But there are following problems in the above-mentioned linear motor: figure 1 The schematic diagram of the direction of the magnetic force lines of the stator teeth is shown. It can be seen from the figure that when the mover of the linear motor is in a balanced position, the ends of the two magnets 100 on it are located inside the stator and the polarities are opposite. At this time, the magnets A part of the magnetic field lines emitted by the 100 will dire...

AI Technical Summary

Problems solved by technology

But there are following problems in the above-mentioned linear motor: figure 1 The schematic diagram of the direction of the magnetic field lines of the stator teeth is shown. It can be seen from the figure that when the mover of the linear motor is in a balanced position, the ends of the two magnets 100 on it are located inside the stator and the polarities are opposite. At this time, the magnets A part of the magnetic field lines emitted by the 100 will directly pass through the stator teeth without interlinking with the stator yoke and close, resulting in a large flux leakage, about more than 30% will be missed, and the flux leakage is serious, resulting in loss of motor output and iron loss Increase, increase the amount of magnet

[0003] At present, there is also a way to reduce the above-mentioned magnetic flux leakage problem by increasing the distance between the magnets, but this method will lead to more serious magnetic flux leakage at the end of the other side of the magnet, and cannot fully utilize and exert the performance of the magnet

[0004] Moreover, there is an uneven air gap between the mover and the stator of the existing linear motor, and there is a serious imbalance in the direction of the mover perpendicular to the tooth pole surface, and there is a large lateral force that causes the mover to sideways , leading to large lateral wear and mechanical wear of the linear motor

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