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Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 29326-2023: Selection of energy-efficient motors including variable speed applications - Application guidelines Status: Valid GB/T 29326: Historical versions
Basic dataStandard ID: GB/T 29326-2023 (GB/T29326-2023)Description (Translated English): Selection of energy-efficient motors including variable speed applications - Application guidelines Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K20 Classification of International Standard: 29.160.01 Word Count Estimation: 54,528 Date of Issue: 2023-12-28 Date of Implementation: 2024-07-01 Older Standard (superseded by this standard): GB/T 29326-2012 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 29326-2023: Selection of energy-efficient motors including variable speed applications - Application guidelines---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 29:160:01 CCSK20 National Standards of People's Republic of China Replace GB/T 29326-2012 Includes selection of energy-efficient electric motors for variable speed applications Application Guidelines Published on 2023-12-28 and implemented on 2024-07-01 State Administration for Market Regulation Released by the National Standardization Administration Committee Table of contentsPreface V Introduction VI 1 Scope 1 2 Normative references 1 3 Terms, definitions, symbols and abbreviations 2 3:1 Terms and definitions 2 3:2 Symbol 2 3:3 Abbreviations 2 4 background 3 4:1 Overview 3 4:2 Introduction to IEC standards 5 5 Application 8 5:1 Applications where the motor operates at full load for a long time 8 5:2 Applications of square torque-speed characteristics (pumps, fans, compressors) 8 5:3 Applications of constant torque characteristics (conveyors, elevators, cranes) 10 6 Basic principles of motor 11 6:1 Overview 11 6:2 Technology 11 6:3 Efficiency12 6:4 Power factor 14 6:5 The relationship between the number of poles, frequency and speed 15 6:6 The difference between constant speed operation and variable speed operation 15 7 Constant speed running motor 16 7:1 Overview 16 7:2 Motor ratings at 50Hz and 60Hz16 7:3 Starting performance17 7:4 Operating speed and slip18 7:5 Losses in variable load motors 18 7:6 power factor 19 7:7 Efficiency at partial load19 7:8 Ratings of motors at different voltages or voltage ranges20 7:9 Soft start 20 7:10 IE efficiency level 20 7:11 Efficiency determination method 21 7:12 Effects of power supply and ambient temperature changes 21 7:13 Motor size 22 8 Variable speed running motor 22 8:1 Overview 22 8:2 Motors operating at rated speed at any speed 22 8:3 Motor losses with variable frequency and load changes 22 8:4 Additional losses in variable speed operation of motors designed for constant speed operation23 8:5 Frequency converter 23 8:6 Variable frequency drive losses 23 8:7 Variable frequency drive power factor 23 8:8 Efficiency of electric motor transmission system at partial speed and partial torque 24 8:9 IE and IES energy efficiency class 24 8:10 Efficiency determination method 24 8:11 Motor and variable frequency drive system dimensions 25 9 System Selection Guide 25 9:1 Introduction to system selection method 25 9:2 Motor System Cost 28 10 Maintenance and life expectancy 29 10:1 Common fault causes of industrial motors 29 10:2 Bearing lubricant life expectancy 30 10:3 Life expectancy of winding insulation30 10:4 Potential sources of failure in VFD powered motor bearings and insulation 31 10:5 Frequency converter maintenance and life expectancy 31 10:6 Maintenance methods 31 Appendix A (informative) Typical efficiency values and losses of motors and frequency converters32 A:1 Overview 32 A:2 Losses of direct grid-connected motors32 A:3 Losses in variable speed motors33 A:4 Frequency converter (VFD) loss 33 Appendix B (informative) Typical efficiency value table of direct-on-grid (DOL) motor 34 Appendix C (informative) Examples of energy savings and life cycle cost savings38 C:1 Overview 38 C:2 water pump 38 C:3 Common misjudgments when replacing motors for fans40 C:4 Parallel fan 41 C:5 Electric motor materials, energy efficiency and CO2 emissions 42 Appendix D (informative) Loss and efficiency interpolation calculation table 44 Reference 45 Figure 1 Industrial motor data statistics 4 Figure 2 Forecast of global market share of industrial motor energy efficiency levels from:1995 to 2020 5 Figure 3 Composition of motor transmission unit 5 Figure 4 7 standard operating points, taken from IEC 60034-2-3 7 Figure 5 Under different rated output powers, the percentage of input power reduction of a 4-pole motor when improving one energy efficiency level 8 Figure 6 System characteristic curve with/without throttle valve and pump characteristic curve at constant speed 9 Figure 7 Average power consumption of ESOBs driven by different motors operating in DOL or VFD10 Figure 8 System characteristic curves of conveyors (transmission belts), cranes, elevators, etc: 11 Figure 9 Cage induction motor 12 Figure 10 Comparison of working performance of DOL motor and VFD motor16 Figure 11 Loss proportion of a typical 4-pole cage induction motor at different rated powers19 Figure 12 Operating characteristics of 4-pole three-phase cage induction motor with different rated power20 Figure 13 Typical curves of current, speed, power factor and efficiency as a function of voltage at constant output power 21 Figure 14 Schematic diagram of the frequency converter 23 Figure 15 Distortion power factor and total harmonic distortion of the line current at the input end of the frequency converter 24 Figure 16 Typical system characteristic curves for different applications25 Figure 17 Overview of the motor transmission unit and related equipment in the system 26 Figure 18 According to the:2017/2018 European market survey, the cost proportion of the main units of MDU with different rated power levels28 Figure 19 Distribution of causes of failure of industrial induction motors 30 Figure 20 Simple relative proportions of 3 different maintenance types (i:e: maintenance, scheduled maintenance, and predictive maintenance) 31 Figure C:1 Standard water pump characteristics38 Figure C:2 Torque-synchronous speed curves of IE2 induction motor and IE4 self-starting synchronous motor, and system characteristics of the fan Curve 40 Figure C:3 Comparison of two different fan control methods at the same flow rate 41 Figure C:4 Energy flow diagram from primary energy, coal, to electric motor 42 Figure D:1 EXCEL calculation sheet excerpt 44 Table 1 Overview of IEC energy efficiency standards for electrical drive systems and motor drive units 6 Table 2 Loss distribution of 4-pole three-phase cage induction motor13 Table 3 Relationship between number of poles, frequency and speed 15 Table 4 Taking 50Hz as the benchmark and calculating the efficiency of 50Hz and 60Hz motors with the same torque17 Table 5 IE energy efficiency class 20 for grid-powered AC motors Table B:1 Typical efficiency values of 50Hz, IE1 induction motors34 Table B:2 Typical efficiency value of 50Hz, IE2 induction motor 35 Table B:3 Typical efficiency values of 50Hz, IE3 induction motor36 Table B:4 Typical efficiency value of 50Hz, IE4 induction motor 37 Table C:1 Calculation of motor performance from operating points OP1 to OP3 39 Table C:2 System losses and performance40 Table C:3 Calculation of electricity savings, coal amount and CO2 emissions43ForewordThis document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: This document replaces GB/T 29326-2012 "Selection of energy-efficient motors including variable speed applications--Application Guidelines" and is the same as GB/T 29326- Compared with:2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows: a) The scope has been changed and expanded to apply to all motors covered by IEC 60034-1 (see Chapter 1, Chapter 1 of the:2012 edition); b) Added symbols such as "Q (flow)" and abbreviations such as "AC (communication)" (see Chapter 3); c) Added analysis of the energy-saving potential of motors and variable frequency drives and introduction to IEC standards related to energy efficiency (see Chapter 4); d) Added examples of applications of motors operating at full load for a long time, square torque-speed characteristics and constant torque characteristics (see Chapter 5); e) Added the basic principles of motors (see Chapter 6); f) Added performance characteristics of constant-speed operation motors (see Chapter 7); g) Added performance characteristics of variable speed operation motors (see Chapter 8); h) Added motor system selection guide (see Chapter 9); i) Changes to maintenance and life expectancy analysis (see Chapter 10, Chapter 9 of the:2012 edition): This document is equivalent to IEC TS60034-31:2021 "Rotating electrical machines Part 31: Energy-efficient electric motors including variable speed applications" "Select Application Guidelines", the file type is adjusted from IEC technical specifications to my country's national standards: Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents: This document is proposed by the China Electrical Equipment Industry Association: This document is under the jurisdiction of the National Rotating Electrical Machines Standardization Technical Committee (SAC/TC26): This document was drafted by: Shanghai Motor System Energy Saving Engineering Technology Research Center Co:, Ltd:, Harbin Electric Power Equipment Co:, Ltd:, Jiangsu Dazhong Electric Co:, Ltd:, Shandong Bocheng Electric Co:, Ltd:, Zhejiang Xinsheng New Energy Technology Co:, Ltd:, Shanghai Electric Group Hai Electric Machinery Co:, Ltd:, Wolong Electric Huaian Qingjiang Electric Co:, Ltd:, Hebei Electric Co:, Ltd:, Shanghai Electrical Apparatus Research Institute (Collection Tuan) Co:, Ltd:, Changsha University, Anbo Motor (Ningde) Co:, Ltd:, Chongqing Institute of Quality and Standardization, Shanghai Dianke Motor Technology Co:, Ltd: Co:, Ltd:, Shenzhen Fengfa Technology Development Co:, Ltd:, Jiamusi Electric Co:, Ltd:, Leibo Electric (Wuxi) Co:, Ltd:, Xiamen Tungsten Motor Industrial Co:, Ltd:, Shandong Huali Motor Group Co:, Ltd:, SEW-Motor (Suzhou) Co:, Ltd:, Zhejiang Jinlong Motor Co:, Ltd: Company, Jiangxi Jiangte Motor Co:, Ltd:, Henan Yongrong Power Co:, Ltd:, Nanyang Explosion-proof (Suzhou) Special Equipment Co:, Ltd:, Siemens Motor (China) Co:, Ltd:, Jiangsu Liduo Motor Co:, Ltd:, Shandong Fuzhi Daxing Motor Co:, Ltd: The main drafters of this document: Zhou Hongfa, Tong Anni, Vanke, Song Yu, Wang Hefen, Yin Chao, Zheng Xiajun, Peng Dahua, Huang Jian, Xu Bingjun, Hu Zhengxi, Zhang Wei, Zhang Ming, Zhang Wenjuan, Zhou Qingyu, Zhang Xu: The previous versions of this document and the documents it replaces are as follows: ---First published as GB/T 29326-2012 in:2012; ---This is the first revision:IntroductionThis document provides guidelines for the technical and economic application of energy-efficient electric motors in constant-speed and variable-speed operation: In:2016, about 50% of global electricity consumption was used for electric motors, which consumed the largest amount of electricity among single types of equipment: Industrial electric motors alone accounted for Accounting for about 30% of the total power consumption: Although the term "power consumption" is widely used, most electricity is used to do useful work: Electric motors convert electrical energy into into mechanical energy, a small part of which is converted into heat loss: Therefore, the electric motor, especially the variable speed and torque can be controlled according to different load requirements: High-speed electric motors are key equipment to achieve significant power savings: A simple way to reduce energy consumption is to invest in more efficient electric motors: Since running costs mainly come from electricity bills, this approach often comes with Get a quick return on investment: However, greater energy saving potential must be determined from a holistic system perspective: It is estimated that although more than 50% of electric The machine will benefit from the control of the frequency converter, such as replacing high-energy-consuming mechanical control devices such as throttling devices that regulate medium flow, but in actual use Only 12% of motors are controlled by frequency converters: This document is intended to provide guidance on the correct use of constant speed and variable speed motors and provide practical Analyze when to use them in terms of their actual use and job characteristics: This document gives examples of constant torque operating characteristics and square torque operating characteristics and describes their practical significance in order to deepen their feasibility: sexual understanding: Parts of this document may also apply to other electric motors: Includes selection of energy-efficient electric motors for variable speed applications Application Guidelines1 ScopeThis document provides technical and economic guidance on the application of AC motors in energy efficiency and is suitable for motor manufacturers, OEMs (original equipment manufacturers), end-users, regulatory agencies, legislators and other interested parties: This document applies to all motors covered by IEC 60034-1, IEC 60034-30-1, and IEC TS60034-30-2:2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document: GB/T 12668:902-2021 Speed-regulated electrical drive systems Part 9-2: Electric drive systems, motor starters, power electronics Ecological design of equipment and its drive applications Energy efficiency indicators for electrical drive systems and motor starters (IEC 61800-9-2:2017, IDT) GB/T 32877-2022 Specific test methods for determining losses and efficiency of AC motors powered by frequency converters (IEC 60034-2-3: 2020,IDT) performance) IEC 60034-2-1 Rotating electrical machines Part 2-1: Test methods for determining losses and efficiency of rotating electrical machines (other than traction motors) Note: GB/T 32877-2022 Specific test methods for determining losses and efficiency of AC motors powered by frequency converters (IEC 60034-2-3:2020, IDT) IEC 60034-30-1 Rotating electrical machines Part 30-1: Efficiency classification of grid-powered AC motors (IE code) [Rotating IEC TS60034-30-2 Rotating electrical machines Part 30-2: Variable speed AC motor efficiency classification (IE code) [Rotatingelec- electricalmachines) The ecological design of transmission applications uses the extended product approach (EPA) and semi-analytical model (SAM) to formulate energy efficiency standards for electrical transmission equipment: ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 29326-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 29326-2023_English as soon as possible, and keep you informed of the progress. 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