Rotation-clogging protection method and device of motor
A technology of motor stalling and protection devices, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve problems such as unfavorable practical operation applications, large differences in vibration waveforms, increased economic costs, etc., achieve good application prospects and prolong service life Effect
Active Publication Date: 2017-02-01
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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Problems solved by technology
However, there are many factors that affect the vibration waveform of the motor, including motor load, light and heavy load, and motor installation. The above factors will cause a large difference in the vibration waveform, so it is easy to cause misjudgment
In addition, since the detection of the vibration waveform requires an additional vibration sensor, this will undoubtedly increase the economic cost and is not conducive to actual operation and application. Therefore, it is necessary to propose a protection method and device specifically for motor stall to meet the actual application requirements.
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[0045] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. A preferred embodiment of the invention is shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.
[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0047] see f...
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The invention relates to a rotation-clogging protection method and device of a motor. The method comprises the steps of detecting a current three-phase current value of the motor after the motor stably runs; performing coordinate conversion on the three-phase current value to obtain a target two-phase current value, and performing calculation on the target two-phase current value by a hair wave voltage threshold algorithm to obtain a hair wave voltage threshold; detecting and calculating a current working voltage value of the motor; and comparing the working voltage value with the hair wave voltage threshold, and judging that the motor is in rotation clogging if the working voltage value is smaller than the minimum value of a product of the hair wave voltage threshold and a preset coefficient. According to the rotation-clogging protection method and device of the motor, proposed by the invention, whether the motor is in rotation clogging or not is judged by comparing the working voltage value with the hair wave voltage threshold to further trigger related protection so as to protect the motor, thus, the service lifetime of the motor is prolonged to the greatest extent, and the rotation-clogging protection method and device has a good application prospect.
Description
technical field [0001] The invention relates to the technical field of motor stall protection, in particular to a motor stall protection method and device. Background technique [0002] With the continuous development of motor insulation materials and the continuous improvement of performance, the aging life of existing insulation materials is generally relatively long, which ensures that the motor has high reliability under normal operating conditions. However, there is still a problem of burn-in during the actual working process of the motor, and one of the important reasons is the motor stalling caused by mechanical jamming. Since the motor stall will cause the current to increase and the temperature to rise, the existing technology generally plays a protective role through over-current protection and temperature protection to a certain extent, but not every time the motor stalls will trigger the over-current protection, and at the same time There may not be other protec...
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IPC IPC(8): H02H7/085
CPCH02H7/0854
Inventor 李云欢
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD