Energy efficiency standards upgrade motor international standards are becoming more efficient

2021-06-15 cetl 484

Energy efficiency standards upgrade motor international standards are becoming more efficient

 

High-level product energy efficiency standards, especially the formulation and implementation of advanced energy efficiency standards, are of great significance to the transformation and upgrading of the industry, which is conducive to guiding and promoting production enterprises to actively carry out technological innovation, and promote the research of new structures, new processes, and new materials in the industry And application. For the motor industry, both international and domestic motor energy efficiency standards have been continuously upgraded in recent years.

 

High-level product energy efficiency standards, especially the formulation and implementation of advanced energy efficiency standards, are of great significance to the transformation and upgrading of the industry, which is conducive to guiding and promoting production enterprises to actively carry out technological innovation, and promote the research of new structures, new processes and new materials in the industry And application. For the motor industry, both international and domestic motor energy efficiency standards have been continuously upgraded in recent years. Internationally, there has been a consensus on IE3 as a mandatory performance efficiency standard. The improvement of motor energy efficiency standards is for the integration and overall technology of the motor industry. The improvement of ability is of great significance.

 

   1. The international standards of motors are more efficient

 

   At present, more than ten countries and regions in the world have issued motor energy efficiency standards. The international motor energy efficiency standards have been continuously improved, and the international motor standards have become more efficient.

 

   The International Electrotechnical Commission IEC uniformly sets the global motor energy efficiency standards as IE1, IE2, IE3, IE4, etc., and sets IE1 as standard efficiency, IE2 as high efficiency, and IE3 as ultra-high efficiency, and publishes its standard values. In 2014, the IEC organization issued IEC 60034-30-1, expanding the motor power range to include motors from 0.12KW to 1000KW, and officially released the IE4 energy efficiency standard value.

 

   The European Union Motor Eco-Design Directive EC No. 640/2009 was officially promulgated on July 22, 2009. The European Union has set a specific timetable for the mandatory standards for IE3 motors. The specific implementation of the instruction is divided into a three-step plan, and the planned timetable is as follows:

 

  IEC60034-30-1 international standard GB18613-2012 my country 2012 edition standard GB18613-2006 my country 2006 edition standard

 

   IE4 energy efficiency level 1

 

   IE3 energy efficiency level two energy efficiency level one

 

   IE2 energy efficiency level 3 energy efficiency level 2

 

  IE1

 

   Level 3 energy efficiency

 

   2. my country's motor energy efficiency standards

 

  GB18613-2012

 

  Requirements for target energy efficiency limit values

 

   my country is one of the world's major motor manufacturing countries. High-efficiency motors are the development direction of the future motor market. If my country's motor products are to enter the world market, the energy efficiency of motor products must meet the technical requirements of the international market. The current energy efficiency standard referenced by the motor industry in my country is the national standard "Energy Efficiency Limits and Energy Efficiency Ratings for Small and Medium-sized Three-phase Asynchronous Motors" issued in 2012. According to the recommendations of GB18613-2012, the target energy efficiency limit values of the motors are recommended as recommended recommendations. The efficiency of the output power should not be lower than the level 2 energy efficiency standard. Enterprises are encouraged to develop and produce IE3 motors to make my country's energy efficiency level reach the world level. The specific implementation recommendations are as follows:

 

  ● For motors with a rated power range of 7.5 to 375kW, the target energy efficiency limit value will be officially implemented 4 years after the implementation of the GB18613 standard;

 

  ● For motors with a rated power of 7.5kW or less, the target energy efficiency limit value will be implemented 5 years after the implementation of the GB18613-2012 standard.

 

   Domestic and international motor energy efficiency standards continue to be upgraded. Are motor manufacturers ready?

 

   3. Comparison between my country and IEC energy efficiency standards

 

   There are differences between my country's motor energy efficiency standards and international standards. Comparing my country's motor standards with IEC standards, we can find that:

 

  1) my country's motor energy efficiency classification is different from international standards

 

   The energy efficiency grades in GB 18613 are divided into 1, 2 and 3 grades, of which grade 1 has the highest efficiency. In international standards, energy efficiency levels are divided into four levels: IE4, IE3, IE2, and IE1, with IE1 being the lowest and IE4 being the highest.

 

  2) The motor range defined by my country's energy efficiency standards is different from international standards

 

my country's motor energy efficiency standards are formulated according to different types of motors. The GB18613-2012 energy efficiency standards are only limited to voltages of 1000V and below, 50Hz three-phase AC power supply, rated power in the range of 0.75-375KW, and the number of poles is level 2, 4 Class and Class 6, single-speed enclosed self-fan-cooled, N-design, continuous-duty general-purpose motors or general-purpose explosion-proof motors. Other power motors also have special energy efficiency standards. The IEC international standard limits motors with a power range of 0.12KW-1000KW to the IEC60034-30-1 standard.

 

  3) Some of my country's level 1 energy efficiency standard values are higher than the IE4 energy efficiency level in IEC

 

   my country's motor energy efficiency standard 1 level of energy efficiency motor efficiency value is determined based on the efficiency value index of copper rotor motor, the development of copper rotor motor depends on the innovation of copper rotor technology. The energy efficiency value of part of the power of my country's level 1 energy efficiency standard is higher than the IE4 standard value specified by IEC. The energy efficiency comparison for the most widely used 4-pole motor is shown in the following figure:

 

   Domestic and international motor energy efficiency standards continue to be upgraded. Are motor manufacturers ready?

 

  4) my country's level 2 and level 3 energy efficiency standards have reached the IEC energy efficiency level

 

   GB 18613-2012 puts forward higher requirements for testing equipment and testing methods, and comprehensively improves the energy efficiency index of my country's motors, making my country's motor energy efficiency values reach the European level. The efficiency index of level 2 and level 3 in GB 18613-2012 meets the efficiency values specified by IE3 and IE2 in the IEC standard.

 

  4. What does the motor manufacturer need to do to upgrade the standard?

 

The continuous upgrade of motor energy efficiency standards is both an opportunity and a challenge for motor manufacturers. At present, many customers, including Europe and the Middle East, have taken the energy efficiency of motors as one of the important evaluation indicators when purchasing motor products, requiring manufacturers to provide The motors produced by it meet the EU's IE3 efficiency index. Therefore, for motor manufacturers aiming at the international market, a motor capable of producing IE3 energy efficiency will greatly enhance the competitiveness of motor manufacturers in the international market.

 

For motor manufacturers focusing on the domestic market, with the vigorous advancement of the national energy conservation and emission reduction cause, domestic users' awareness of energy conservation and emission reduction has increased, and more and more users are actively pursuing more energy-efficient products. Motor manufacturers are also required to actively research and develop and Produce motors that meet higher energy efficiency and promote the application of high-efficiency motors.

 

  Many motor manufacturers have taken the initiative to transform and innovate in response to standard upgrades, continuously launching high-efficiency motor products, and maintaining stronger competitiveness in the market.

 

Nord Drive Group is one of the world's leading drive technology manufacturers. At the beginning of 2016, Nord Drive Group has begun to provide IE3 efficiency and NEMA MG1 Premium efficiency standards in accordance with the IEC 60034-30-1 standard, as well as rated power For motors of 0.12 kW and above. Therefore, the manufacturer has surpassed the legal standards, especially for the smaller range of product performance. These devices complete all motors currently in operation.

 

   In order to facilitate the replacement of the machine and equipment manufacturers, the size of the NORD IE3 motor is roughly the same as that of the IE2 model and can be modified without any changes to the machine and equipment. In addition, NORD’s product line also includes motors with IE4 or ultra-high efficiency, which are controlled by inverters by default. Its solution can achieve a higher level of efficiency. NORD can provide customers with comprehensive information and professional guidance in selecting motors suitable for use in the world, as well as designing future-oriented systems and equipment.

 

   In addition, as a well-known domestic motor company, Wolong Electric Nanyang Explosion-proof Group Co., Ltd. has been committed to the research and development, and promotion of high-efficiency motors for many years and has also achieved excellent results. The ultra-efficient copper rotor motor developed and produced by Nanyang Explosion-Proof Group, which uses cast copper rotors provided by Yunnan Copper Die-casting Technology Company, has won the International Efficiency Medal of the Global Ultra-Efficient Motor Energy Efficiency Competition. This is my country's first international award in the motor field, and it also represents China's high-efficiency and energy-saving motor technology that has reached the world's advanced level.

 

  Expansion: The composition of the energy-saving standard system for the motor system

 

  The energy-saving system of the motor system refers to a scientific and organic whole formed by the standards related to the energy-saving of the motor system within a certain range according to their internal connections, which has the characteristics of coordination, structure, and purpose. Establishing the energy-saving standard system of the motor system is helpful to analyze its hierarchical structure and process structure, o that the energy-saving standard can play the biggest role.

 

  The energy-saving standard architecture of the motor system is shown in Figure 1. It can be seen from Figure 1 that the motor system energy-saving standard system consists of four sub-systems: testing and calculation method standards, energy-saving device standards, economic operation standards, and equipment energy efficiency standards. Except for the energy-saving device standard sub-system, other sub-systems have 4 to 5 standards.

 

   Domestic and international motor energy efficiency standards continue to be upgraded. Are motor manufacturers ready?

 

  American Electric Motor Energy Efficiency Standard

 

   In view of the huge energy-saving potential of motor systems, the United States has enforced the implementation of high-efficiency motors since the 1990s. The power and speed range specified by the US Energy Policy Act are the same as those of NE? MA12-10, a high-efficiency motor efficiency standard issued by the American Motor Manufacturers Association. The efficiency of the EPACT index has increased by 1 to 5.7 percentage points compared with the average value of the general motor. The efficiency of the 11 specifications has increased by 2.7 percentage points on average, and the loss has decreased by 15% to 33%, respectively, with an average drop of 24%. In order to overcome the shortage of power supply, in 2001, NEMA and the American Energy Efficiency Alliance jointly formulated a new ultra-high efficiency motor standard, namely the NEMA  Premium standard. The efficiency index of this standard basically reflects the average level of ultra-high-efficiency motors in the current US market. The implementation of this standard laid a solid foundation for the mandatory implementation of ultra-high-efficiency motors in the United States in 2011.

 

   EU Electric Motor Energy Efficiency Standard

 

In order to promote the promotion of high-efficiency motors, the European Union and the European Association of Motor and Power Electronics Manufacturers reached an agreement in 1999, that is, the motor industry, in accordance with the requirements of the EU to actively carry out energy-saving work on electric motor systems, has been voluntary under the specific guidance of the European Commission’s Energy and Transportation Bureau. To formulate and implement an agreement on the energy efficiency level of electric motors. The agreement is referred to as the "EU-CEMET Agreement". The products covered by the EU-CEMET agreement are fully enclosed fan-cooled three-phase AC cage asynchronous motors, with power ranging from 1.1 to 90 kW, 2 poles and 4 poles, power supply 400V, 50Hz, continuous rating, standard design.

 

   Australian Electric Motor Energy Efficiency Standard

 

  Australia started to formulate electric motor standards in the late 1990s. Under the leadership of the Australian Greenhouse Office, the federal and state governments have worked together to develop this standard. The Greenhouse Effect Office is responsible for coordinating this work, but it is the states that have the legal authority to set standards. At first, the focus of the work was to formulate some standards to eliminate the products with the lower 40% efficiency in the market, but almost at the same time, Europe introduced the eff1 and eff2 standards, because the eff2 standard is very close to the 40% elimination drafted by Australia. Product standards, so Australia has decided to make the eff2 standard as a national mandatory standard and eff1 as a national voluntary high-efficiency standard.

 

   Australia actively participated in the formulation of the International Electrotechnical Commission’s 61972 standards. Taking into account the introduction of the new IEC standard, Australia has formulated two sets of efficiency values. One set adopts the IEC34 test method, and the other adopts the IEC61972 standard test method, including the IEEEB test method. The relationship between these two sets of test methods varies according the functional relationship between the motor model and the motor design.