Compressor

Abstract

The invention provides a compressor. The compressor comprises a shell, a motor assembly, a plurality of rotor conductors and a weight increasing piece, wherein the motor assembly is arranged in the shell in an accommodating mode; the motor assembly comprises a rotor and a stator; the stator is provided with a cylindrical region, and the rotor is arranged in the cylindrical region of the stator, and can rotate relative to the stator; the rotor comprises a rotor iron core which is made of a first material and is provided with a plurality of rotor grooves which axially penetrate through; the multiple rotor conductors are arranged in the rotor grooves; and the weight increasing piece is stacked on the rotor iron core, or above the rotor iron core, the weight increasing piece is made of a second material, and the density of the second material is greater than that of the first material.

Description

technical field [0001] The invention relates to the field of refrigeration, in particular to a compressor. Background technique [0002] In general, a hermetic compressor includes a motor for generating a driving force in an inner space of a housing, and a compression part coupled to the motor for compressing refrigerant. [0003] At present, some countries comprehensively promote the electromagnetic compatibility (EMC) improvement requirements of compressors, and the second harmonic needs to meet the certification requirements, while some compressors find that the electromagnetic compatibility (EMC) is not good during the electromagnetic compatibility (EMC) testing process. meet the requirements. [0004] The root cause of harmonic generation is due to non-linear loads. When the current flows through the load, it does not have a linear relationship with the applied voltage, forming a non-sinusoidal current, thereby generating harmonics. Harmonic current produces harmonic...

AI Technical Summary

Problems solved by technology

Harmonic current vectors from different harmonic sources are added together to cause great harm. The instantaneous impact is due to the offset of the zero-crossing moment of the voltage waveform, which makes the equipment control malfunction and misoperation. The long-term impact is mainly heat generation but no work, resulting in capacitors and Rotating motors are prematurely aged or even damaged

[0005] In order to suppress the second harmonic exceeding the standard, methods such as changing the pump body to double rotors and changing the motor windings can be used, but if the pump body is changed to double rotors, the cost of implementation will be relatively high; if the method of changing the motor windings is adopted, will change the electromagnetic force and may not necessarily produce the desired effect

Therefore, these methods are not ideal

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