Compressor protection method, device and computer-readable storage medium
A compressor protection, compressor technology, applied in the direction of machine/engine, motor control, control system, etc., can solve the problems of obvious noise, increased compressor operating noise, unbalanced three-phase current of the compressor, etc., to reduce the operation Noise, damage avoidance effect
Active Publication Date: 2019-11-12
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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Problems solved by technology
[0003] During the operation of the compressor, if the current sampling circuit of a certain phase is abnormal, the magnitude of the collected current of the phase will be abnormal, and then the three-phase current of the compressor will be unbalanced.
The unbalanced three-phase current of the compressor will cause the noise of the compressor to increase significantly, especially when the compressor current is relatively large, the noise will be very obvious, and the compressor will run with three-phase unbalanced and high current for a long time, which may cause compression Machine winding burnt out
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[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0053] See figure 1 , Which is a flowchart of a compressor protection method provided by an embodiment of the present invention, which specifically includes:
[0054] S10. Collect the three-phase current of the compressor, where the three-phase current is collected by a sampling circuit, and the three-phase current of the compressor is the U-phase current i u , V phase current i v , W phase current i w .
[0055] S20. Calculate the unbalanc...
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The invention discloses a compressor protection method and device and a computer readable storage medium. According to the method, three-phase current of a compressor acquired by a sampling circuit is acquired; the corresponding degree of unbalance of the three-phase current of the compressor is calculated according to the three-phase current; the threshold interval of the degree of unbalance is judged, and the thresholds include a first threshold, a second threshold and a third threshold; the abnormal level of the degree of unbalance is obtained according to the threshold interval of the degree of unbalance; and different protective measures are taken for the compressor according to different abnormal levels of the degree of unbalance so that the compressor can be effectively protected, and the objectives of reducing the operation noise of the compressor and avoiding damage to the compressor can be achieved.
Description
Technical field [0001] The present invention relates to the technical field of compressor protection, in particular to a compressor protection method, device and computer readable storage medium. Background technique [0002] At present, the compressor current is generally sampled through the series resistance of the lower bridge arm of the switch tube. According to the sampled compressor current combined with the compressor body parameters, the accurate rotor position signal of the compressor is obtained through the position estimation algorithm. The compressor stator current is sampled to Importantly, the accuracy and real-time of current sampling determine the accuracy of the compressor rotor position and the dynamic and static performance of the system. [0003] During the operation of the compressor, if the current sampling circuit of a certain phase is abnormal, the magnitude of the collected current of the phase will be abnormal, which will cause the three-phase current of t...
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IPC IPC(8): H02P29/028F04C28/28
CPCF04C28/28H02P29/032
Inventor 邓焕明
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD