What is the shaft power and rated power in the motor?

Date：2023-07-26　　　Author：XINDA MOTOR

Motors play an important role in modern industrial production. This article will introduce the importance and relationship of shaft power and rated power in motors. When selecting a motor, shaft power and rated power are two very important parameters, and their selection directly affects the performance and service life of the motor.

Definition of shaft power and rated power.

Shaft power refers to the maximum power that can be transmitted on the motor shaft, that is, the output power of the motor .

The rated power refers to the maximum power that the motor can achieve under specified conditions, that is, the maximum output power that the equipment can achieve when it is working normally .

Generally speaking, when the motor is working normally, the shaft power should be less than or equal to the rated power . If the shaft power is always greater than the rated power, it will cause the motor to be overloaded and may cause the motor to fail. Therefore, it is very important to know the shaft power of the motor to predict possible problems during the operation of the motor, and to adjust and maintain it in time.

The calculation formula of centrifugal pump shaft power is: flow x lift x9.81 x medium specific gravity ÷ 3600 ÷ pump efficiency

There are many factors that affect shaft power and rated power, the most important of which are working load , speed and efficiency . When the motor is under high load, high speed or high efficiency working condition, its shaft power will be greater than the rated power, while under low load, low speed or low efficiency working condition, its shaft power will be less than the rated power.

Why is the shaft power less than or equal to the rated power

This is because during the design process of the motor, the rated power has taken into account the load that the motor can bear. The shaft power is affected by the working conditions and may reach or exceed the rated power. However, if the shaft power is always greater than the rated power, the motor will exceed its tolerance when working for a long time, resulting in serious failure. Therefore, when choosing a motor, we need to choose the appropriate rated power according to the specific needs, so as to ensure that the motor can achieve the best effect when it is working normally.

The importance of selecting the rated power of the motor is self-evident. Proper selection of rated power can ensure that the motor has sufficient operation guarantee during the entire service life, and also ensures the high efficiency and reliability of the motor. If the rated power is unreasonably selected, it will cause problems such as overheating and reduced efficiency of the motor during operation, which will seriously affect the performance and life of the equipment.

In a word, the shaft power and rated power are very important parameters in the motor equipment. Correct selection of them can ensure that the motor has sufficient operation guarantee during the entire service life, and also ensures the high efficiency and reliability of the motor. When choosing a motor, we need to consider multiple factors comprehensively to ensure that the equipment can achieve the best results when it works normally.

What is the shaft power and rated power in the motor?

Definition of shaft power and rated power.

Why is the shaft power less than or equal to the rated power

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