In the process of improving the efficiency of 3 phase electric ac motor, it will not cause adverse effects on its power factor and other performance.
GB18613, GB30253 and GB30254 are limited requirements for motor energy efficiency values stipulated in different series of products, but also only for the special provisions of the efficiency of the corresponding product, and the technical conditions corresponding to the product will not be contradictory, but in terms of the efficiency index of the motor, any product under the constraint of mandatory standards, The efficiency indicators specified in the technical conditions shall not be lower than the minimum limit requirements of the corresponding mandatory standards.
From the reference standard of 3 Phase Induction Motor technical conditions, we can see that for the efficiency indicators of the motor, whether it is the mandatory requirement standard of the motor, or the technical conditions of the corresponding product, it is based on IEC60034-30-1 as a reference, so there will be no contradiction between the two from the determination of the efficiency indicators. For example, the basic series of motors that are relatively widely used, YE2, YE3, YE4 and YE5 motors, different series of motors correspond to different levels of efficiency in IEC standards, and YE5 motor energy efficiency corresponds to the highest energy efficiency level IE5 stipulated in the current IEC standards.
With the improvement of motor energy efficiency requirements in our country, the minimum limit requirement of GB18613 in the 2020 version is IE3, that is, corresponding to YE3 series products; YE2 and the previous Y2, Y series products, because the energy efficiency does not meet the requirements, can no longer be produced and sold.
Another problem is that in addition to the improvement of the efficiency index of the high efficiency motor, will the other performance indicators of the motor deteriorate? It is certain that the mandatory requirements of energy efficiency standards are only for the requirements of motor efficiency indicators, and the technical conditions of the motor will be set under the requirements of the standard, and we will take the technical conditions of YE4 motor as an example to elaborate the problem.
At present, the standard corresponding to the technical conditions of the YE4 series motor is JB/T 13299-2017, the efficiency index of the motor is set in accordance with IE4, and the specific requirements for the determination of the efficiency of the motor are put forward, which is consistent with the provisions of GB18613. The power factor and other performance indicators of the motor are specified in the technical conditions, that is, while the efficiency index of the motor is improved, the other performance of the motor must be ensured to meet the requirements.
From the technical level analysis, high efficiency motor needs enough design technology and process technology to pave the way, relatively speaking, the cost of high efficiency motor is relatively high, but from the long-term energy saving and environmental protection factors analysis, high efficiency motor is the protagonist of the future motor market.
