Development of electric motors
The Y2 series motor was finalized in 1996.
The Y3 series motor was finalized in 2003.
In 2002, to replace the Y2 motor, the Y3 series motor was designed, using cold-rolled silicon steel strips instead of hot-rolled silicon steel. This series of motors uses cold-rolled silicon steel, and the entire series basically meets the GB18163 energy efficiency limit standard.
2005 High-Efficiency Motor - YX3 Series Motor
Based on the energy situation, energy conservation and emission reduction considerations, and the development of the global motor industry, the small and medium-sized motor industry has begun to develop high-efficiency motors that meet the energy efficiency evaluation value (Level 2 standard) in GB18163. Improvements have been made in areas such as the selection of magnetic materials, lamination research, and ventilation enhancement. Efficiency has increased by an average of 2.76%. This can result in significant savings in electricity costs under long-term continuous load.
2010 Ultra-High Efficiency Motor - YE3 Motor
In response to the US's mandatory implementation of ultra-high efficiency standard motors in 2011, the Shanghai Electric Machinery Research Institute in China led the development of a series of ultra-high efficiency motors. These motors reduce losses by 20% compared to high-efficiency motors. For motors operating for more than 8,000 hours annually with a load rate exceeding 60%, and assuming an electricity cost of 0.7 yuan per kilowatt-hour, the additional cost of standard motors can be recovered in approximately 1.5 years.
Motor energy consumption standards
According to the new national energy efficiency standards for electric motors promulgated in 2012:
GB18613-2012 Energy Efficiency Limits and Energy Efficiency Grades for Small and Medium-Sized Asynchronous Three-Phase Motors
The YX3 series motors are high-efficiency, level 3 energy-saving motors.
The YE3 series motors are ultra-high efficiency, level 2 energy-saving motors.
National motor energy consumption development policy
National Development and Reform Commission Document No. 181 [2012]: "Notice on Implementing the 2012 High-Efficiency Motor Promotion Task"
1. → GB18613-2006 Energy Efficiency Level 3 (Ordinary Efficiency) is prohibited from production and should be phased out in use.
2. → High-efficiency motors should be selected for new construction and relocation.
3. → Ministry of Industry and Information Technology [2009] No. 67 stipulates that motors (J, JO, YB) should be phased out by the end of 2013.
4. → JS/JSQ motors will be phased out by the end of 2015.
Energy consumption analysis of motors
1. Energy consumption components of an electric motor
2. Improved efficiency of YE3 motors
(1) Reduced stator loss
Higher quality grade steel wire
Compact end design
Good fill factor
Excellent impregnation process
Increase the core length appropriately (to reduce current density).
(2) Reduced wind friction loss
Use a smaller fan without compromising cooling performance.
Higher quality bearings
Higher level of stator and rotor concentricity reduces vibration and friction.
(3) Reduced stray loss
Optimized electromagnetic design
Higher requirements for manufacturing processes
(4) Reduce rotor aluminum consumption
Excellent rotor die-casting process
Improve rotor insulation
High-pressure die-cast aluminum rotor
High rotor dynamic balance requirements
(5) Reduced iron consumption
High-efficiency laminations are selected to ensure low material loss and high magnetic properties.
Advanced and rational groove design
Thinner silicon steel sheets
Efficiency comparison of YE3 ultra-high efficiency motor
