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How to choose motor to deduct noise?

Views: 164     Author: Site Editor     Publish Time: 2022-08-01      Origin: Site


如何选择电机降低噪音

很难想象今天的世界没有电机,它们的用途不断扩展到我们生活的新领域,人们对这些电机的音质要求也越来越高,电机和其他设备的制造商越来越需要在处理噪音方面具有广泛的能力。在竞争激烈的市场上,电机制造商往往很难找到解决噪音问题的办法,设计和制造的好坏一定程度上取决于拥有对声学专业知识的理解和运用。即使找一种合格的方式来描述一个噪音问题也常常很困难的,通常情况下,甚至都不会尝试这样做。相反,人们会含糊其辞地说:“我们的电机有噪音问题!”

 

当对电机的类型和尺寸的进行评估时,大都关注的是所需功能的质量、使用寿命以及采购和运行成本。诸如加热、振动和噪音等副作用通常是不受欢迎的,但它们在决定使用某一特定电机时起着非常重要的作用。小型电机通常安装在设备的狭小空间内,因此即使在实际热输出很小的情况下,它们所产生的热量也可能特别不利,因为周围的设备本身往往提供很少的散热机会。电机的频率通常接近人和人的耳朵和触觉,小电机所能产生的噪音和震动相对而言要比大型电机所能产生的噪音和振动小得多。

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对于大型电机和电动机,必须使用标准来测量和评估噪声和振动,小型电动机由于尺寸小而几乎听不见声音,即使它所产生的振动一般也不会被认为是令人反感的。小型电机只有安装在设备中或设备上,才能进行主观评估,通常只有在这种安装环境下,才会产生重大影响。对安装在设备中的电机的噪声和振动特性的主观评价必须通过测量技术来量化,根据这些信息,电机的振动和噪声限值规范必须推导出来才能达成一致,才能在电机制造时满足这些规范。这种限制的描述和推导在个别情况下可能非常复杂,因此,用于大型电机的测试标准对于小型电机来说没有意义。

 

电机是噪音的来源,安装它的设备只是“扬声器”,努力找出产品中令人不快的振动和噪音的原因,并尽可能消除它们。客户,制造商必须设法解决预期或现有的振动或噪声问题,可以最佳地解决关于整个系统中的电机运行。在从电机本身到我们的听觉或触觉的过程中,克服不希望出现的振动或噪音往往比实际情况更容易、更具成本效益。如果不遵循某些规则,电机在其传输路径上引起的振动就会变成更加严重,这意味着必须对噪音传输路径的基本原理进行分析和考虑,以及此类噪音和振动的独特特性和降低噪音和振动的技术选择。


结论

对电机噪音进行测量之前,必须首先从概念上考虑安装电机的设备的振动特性,从这个概念分析中得到的系统测量和测试的概念模型。经过有计划和系统地进行测量,其结果才会清楚,采用相应的声振测量技术,结合合适的方法。只有这样,才能从主观判断转移到基于实际测量的描述,以获得可用于电机开发、制造、应用和质量测试的极限值。



SHOUXIN MOTOR TELL U

How to choose motor to deduct noise

It's hard to imagine today's world without motors, their use continues to expand into new areas of our lives, the demands on the sound quality of these motors are getting higher and higher, and manufacturers of motors and other equipment are increasingly required to have the ability to handle noise broad capabilities. In a highly competitive market, it is often difficult for motor manufacturers to find solutions to noise problems. The quality of design and manufacturing depends to a certain extent on the understanding and application of acoustic expertise. Even finding a qualified way to describe a noise problem is often difficult, and often not even attempted. Instead, people would say vaguely, "We have a noise problem with our motors!"

When evaluating the type and size of a motor, most of the focus is on the quality of the required function, the service life, and the cost of purchasing and operating. Side effects such as heating, vibration and noise are generally undesirable, but they play a very important role in the decision to use a particular motor. Small motors are often installed in small spaces in equipment, so the heat they generate can be particularly disadvantageous even when the actual heat output is small, as the surrounding equipment itself tends to provide little opportunity for cooling. The frequency of the motor is usually close to that of the human ear and touch, and the noise and vibration that a small motor can produce is relatively much smaller than the noise and vibration that a large motor can produce.

      

For large motors and electric motors, noise and vibration must be measured and evaluated using standards, and small motors are barely audible due to their small size, even though the vibrations it produces are generally not considered objectionable. Small motors can only be subjectively assessed if they are installed in or on equipment, and usually only in such installations will they have a significant impact. The subjective evaluation of the noise and vibration characteristics of the motor installed in the equipment must be quantified by measurement techniques, and from this information, the vibration and noise limit specifications for the motor must be derived in order to be agreed so that these specifications can be met when the motor is manufactured. The description and derivation of this limitation can be very complex in individual cases, so a test standard for large motors does not make sense for small motors.

The motor is the source of the noise, and the equipment it is installed on is just the "speaker", trying to figure out the cause of unpleasant vibrations and noises in the product and eliminate them as much as possible. Customers, manufacturers must find ways to address anticipated or existing vibration or noise issues that can best be addressed regarding motor operation in the overall system. Overcoming unwanted vibration or noise on the journey from the motor itself to our hearing or touch is often easier and more cost-effective than it actually is. If certain rules are not followed, the vibration induced by a motor on its transmission path can become more severe, which means that the fundamental principles of noise transmission paths must be analyzed and considered, as well as the unique characteristics and mitigation of such noise and vibration Technology options for noise and vibration.


Conclusion

Before the measurement of motor noise, the vibration characteristics of the equipment on which the motor is installed must first be considered conceptually, and a conceptual model of the system measurement and testing obtained from this conceptual analysis. The results will be clear only after a planned and systematic measurement, using the appropriate acoustic and vibration measurement techniques combined with appropriate methods. Only then can it be possible to move from subjective judgments to descriptions based on actual measurements to obtain limit values that can be used for motor development, manufacturing, application and quality testing.