Difference between YX3 motor and YE2 motor

YX3 motor is the first one in China with cold-rolled silicon steel as its magnetic material. It is designed and developed on the basis of Y3 motor. Y3 motor is the first ordinary motor designed in China with cold-rolled silicon steel as magnetic material, and it is a national product of "replacing heat with cold".

YX3 motor is the first one in China with cold-rolled silicon steel as its magnetic material. It is designed and developed on the basis of Y3 motor. Y3 motor is the first ordinary motor designed in China with cold-rolled silicon steel as magnetic material, and it is a national product of "replacing heat with cold". YX3 motor was designed in 2003 and passed the appraisal organized by Machinery Federation in September 2005. The main performance indexes meet the grade 2 energy efficiency standard of GB/T18613-2002 edition-that is, the energy-saving evaluation value. It also meets the index requirements of EFF1 in Europe. The energy-saving evaluation value of the later GB/T18613-2006 edition can also be reached. In its detection method, the stray loss of the motor is calculated by 0.5% of the input power, and the electromagnetic data is calculated according to the design. Before 2008, domestic motor manufacturers used YX3 motors, except for joint venture brands, when they registered Grade 2 energy efficiency and certified energy-saving products. Therefore, as a motor, YX3 motor is widely known in China.

In 2008, IEC and NEMA of the United States unified the indexes and testing methods of motors through negotiations, and formulated new energy efficiency indexes and testing methods. The big difference is that the index value of the motor, that is, IE2 value, has decreased, but the detection method of the motor adopts the low uncertainty detection method, and the big difference is that the stray loss of the motor adopts the actual measurement method. This is different from the design of YX3, which is faced with index adjustment, and there is no motor corresponding to IE3 index in China.

As a result, in 2009, Shanghai Institute of Electrical Science organized dozens of motor factories in the motor industry in southern Anhui to jointly design motors that meet IE2 and IE3 indexes. On the basis of YX3 motor, part of the design of IE2 motor was adjusted to meet the requirements of IE2 index and testing method, and it was named YE2 series motor. This series design passed the appraisal organized by Machinery Industry Federation in 2011. There is no reference sample for the motors that meet IE3 index in China, but only NEMA super series, and a few manufacturers are making them. Therefore, on this basis, the domestic motors that meet IE3 requirements are developed, named YE3 series super motors, and this work ended in 2013.

The later revision of GB/T18613-2012 takes IE2 as the basic energy efficiency limit value, that is, level 3 energy efficiency index, and IE3 as the energy saving evaluation value, that is, level 2 energy efficiency index. That means that YX3 series motors can reach the new level 3 energy efficiency index with a little adjustment, while YE2 is originally designed according to IE2 requirements. In the new standard, although YX3 index value is slightly higher than that of YE2 motor, the detection method is different, and its performance is similar to that of YE2 motor in many specifications, all of which belong to the new level 3 energy efficiency. These two series motors are no longer regarded as motors in the new national standard. At present, Y,Y2, motors have been eliminated in China, but people still say that YX3, YE2 are motors.