For motor products, power and efficiency are very critical performance indicators. Professional motor manufacturers and test institutions will conduct tests and evaluations in accordance with corresponding standards; and for motor users, they often use current to evaluate intuitively.
As a result, some customers raised such questions: the same equipment originally used an ordinary motor, but found that after using a high-efficiency motor, the current became larger, and it felt that the motor was not energy-saving! In fact, if a real high-efficiency motor is used, the scientific evaluation method is to compare and analyze the power consumption under the same workload. The magnitude of the motor current is not only related to the active power input by the power supply, but also to the reactive power. Under the same working conditions, among the two motors, the motor with relatively large input reactive power has a large current, but it does not mean the ratio of output power to input power or the low efficiency of the motor. There is often such a situation: when designing a motor, the power factor will be sacrificed, or the reactive power will be larger under the same output power, in exchange for lower input active power, output the same active power, and achieve low power consumption. Of course, this situation is subject to the premise that the power factor meets the regulations.
Given the infinite nature of human desires, the most important thing in an economic activity is, of course, the best use of its limited resources. This brings us to the crucial concept of efficiency.
In economics we say this: An economic activity is considered efficient if it is no longer likely to improve anyone’s economic well-being without making others worse off. Contrary situations include: “unchecked monopoly”, or “malignant and excessive pollution”, or “government intervention without checks and balances”, etc. Such an economy would of course only produce less than what the economy would have produced “without the above problems”, or it would produce a whole bunch of things that were wrong. These all leave consumers in a worse position than they should be. These problems are all consequences of the ineffective allocation of resources.
Efficiency refers to the amount of work actually accomplished per unit time. Therefore, the so-called high efficiency means that a large amount of work is actually completed in a unit time, which means saving time for individuals.
Efficiency is the ratio of output power to input power. The closer the number is to 1, the better the efficiency. For online UPS, the general efficiency is between 70% and 80%, that is, the input is 1000W, and the output is Between 700W~800W, UPS itself consumes 200W~300W power; while offline and online interactive UPS, its efficiency is about 80%~95%, and its efficiency is higher than online type.
Efficiency refers to the optimal allocation of limited resources. Efficiency is said to be achieved when certain specific criteria are met, the relationship between the results and the resources used.
From the perspective of management, efficiency refers to the ratio between the various inputs and outputs of the organization in a specific time. Efficiency is negatively related to input and positively related to output.
Post time: Jul-27-2022