Is it possible to determine the efficiency of a motor directly from the amount of motor current?
For motor products, its efficiency value will be analyzed and calculated in accordance with the standard type test data, in the motor factory test, each motor manufacturer has its own judgment standards, according to the motor type test results to determine the motor’s no-load current and no-load loss floating range, and qualitatively determine whether the motor’s efficiency index is in line with the requirements.
In the process of using the motor, the customer more often through the size of the current to analyze the motor to determine the efficiency of the high and low, although with a certain degree of reason, but sometimes will be inconsistent with the facts of the determination of the results, in fact, it is a kind of experience is not rigorous. More intuitive, reasonable judgment should be: lock a task or a project, comparative discernment of two or more batches of different energy-efficiency level motor to complete the task or project consumed by the power consumption, less power consumption of natural high efficiency.
In order to scientifically and reasonably interpret the energy-saving effect of high-efficiency motors, we should extract as much as possible the essence of experience, in a straightforward, easy-to-understand form of popularization of theoretical knowledge, to guide the customer multi-faceted cognitive, read and understand the motor. Specifically, we can recognize energy-saving products from four dimensions: “more”, “faster”, “better” and “save”:
(1) in the case of motor current load current does not change much, we can complete the workload from the same time to compare, that is, the same time the same power consumption, high-efficiency motors do more work, we attribute to “more”.
(2) Under the premise that there is no significant difference in the motor current, according to the same workload time used to compare, high-efficiency motors used to shorten the time, but reflects a speed, we can be summarized as “fast”.
(3) analyze the level of motor loss and heat generation, comparing the object of investigation. Because the external appearance of the motor for the temperature rise, vibration, noise and other specific features, if the motor current parameters are not too different, the heat means less loss, can be disproved that the motor is highly efficient. For this aspect of the content, so that customers have a thorough understanding of the more difficult, but the low temperature, smooth operation is always the most satisfied customers, can be summarized as a “good”.
(4) How can customers really feel the energy-saving effect of high-efficiency motors, is reflected through the most intuitive data. The driving force behind the pursuit of high efficiency is how to maximize revenue. Through the specified time, the current consumption of electricity and the actual completion of the workload comparison, that is, the same workload conditions corresponding to the comparison of power consumption, high-efficiency motors corresponding to the power consumption than ordinary motors, we will be attributed to “save”, that is, high-efficiency motors, the essence of the characteristics of the motor.
