GB/T 25442-2018 English PDFUS$1404.00 · In stock
Delivery: <= 10 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 25442-2018: Standard methods for determining losses and efficiency of rotation electrical machines from tests (excluding machines for traction vehicles) Status: Valid GB/T 25442: Historical versions
Basic dataStandard ID: GB/T 25442-2018 (GB/T25442-2018)Description (Translated English): Standard methods for determining losses and efficiency of rotation electrical machines from tests (excluding machines for traction vehicles) Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K20 Classification of International Standard: 29.160.01 Word Count Estimation: 74,783 Date of Issue: 2018-07-13 Date of Implementation: 2019-02-01 Older Standard (superseded by this standard): GB/T 25442-2010 Regulation (derived from): National Standard Announcement No. 10 of 2018 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 25442-2018: Standard methods for determining losses and efficiency of rotation electrical machines from tests (excluding machines for traction vehicles)---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. Standard methods for determining losses and efficiency of rotation electricalmachines from tests(excluding machines for traction vehicles) ICS 29.160.01 K20 National Standards of People's Republic of China Replace GB/T 25442-2010 Rotating motors (except traction motors) determine losses and Efficiency test method [IEC 60034-2-1.2014, Rotationelectrical machines-Part 2-1. Standard Machinesfortractionvehicles), IDT] 2018-07-13 released.2019-02-01 implementation State market supervision and administration China National Standardization Administration issued ContentForeword III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 symbols and abbreviations 6 5 Basic requirements 8 6 Test methods for determining the efficiency of induction motors 12 7 Test method for determining the efficiency of synchronous motors 35 8 Test method for determining the efficiency of DC motors 48 Appendix A (Normative) Eh-star test method test value calculation 62 Appendix B (informative) Type of excitation system 64 Appendix C (informative) Induction motor slip measurement 65 Appendix D (informative) Method 2-1-1B Test Report Template 66 Reference 68ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 25442-2010 "Rotary motor (except traction motor) test method for determining loss and efficiency", and Compared with GB/T 25442-2010, the main technical changes are as follows. --- Added the method of dividing the test method into the preferred method, the field method and the conventional method (see 5.3); --- Removed references to several relative uncertainties such as "low uncertainty", "intermediate uncertainty" and "high uncertainty" (see.2010 edition) 5.2); --- Deleted the preferred test method selection table according to the motor type (see Table 1, Table 2, Table 3 of.2010 edition); --- Revised the requirements for the frequency change of the power supply (see 5.4.2, see 5.4.2 of the.2010 version); --- Revised the requirements for the fuel gauge (see 5.5.2, see 5.5.2 and 5.5.3 for the.2010 edition); --- Increased the temperature of the test environment (see 5.10); --- Removed the calibration motor test, self-deceleration test and thermal test (see Appendix D of the.2010 edition); --- Increased the test flow chart of each test method, visually showing the test process, which will effectively avoid understanding errors and improve the test The accuracy of the test procedure (see Chapter 6, Chapter 7, Chapter 8). This standard uses the translation method equivalent to IEC 60034-2-1.2014 "Rotating electrical machines Part 2-1. Tests for loss and efficiency Method (except traction motor). The documents of our country that have a consistent correspondence with the international documents referenced in this standard are as follows. ---GB/T 755-2008 Rotating electrical machine rating and performance (IEC 60034-1.2004, IDT); ---GB/T 20114-2006 Special test method for DC motors supplied by ordinary power supply or rectified power supply (IEC 60034-19. 1995, IDT); ---GB/T 21211-2017 Equivalent load and superposition test technology indirect method to determine the temperature rise of rotating electrical machine (IEC 60034-29. 2008, IDT). This standard makes the following editorial changes. --- In line with the existing standard system, the name of this standard is changed to "Rotary motor (except traction motor) to determine the loss and efficiency test method"; --- Revised the Eh-star method to determine the load stray loss value of the corresponding rated load in the load stray loss calculation formula [see 6.2.5.3 Footnotes]. This standard was proposed by the China Electrical Equipment Industry Association. This standard is under the jurisdiction of the National Rotating Electric Machine Standardization Technical Committee (SAC/TC26). This standard was drafted. Shanghai Motor System Energy Conservation Engineering Technology Research Center Co., Ltd., Shandong Huali Electric Group Co., Ltd. Division, Wolong Electric Group Co., Ltd., Jiangsu Xi'anda Explosion Protection Co., Ltd., Shandong Jinan Power Generation Equipment Co., Ltd., Shanghai De Zhechi Electric Co., Ltd., Xi'an Taifu Xima Motor Co., Ltd., Regal Electric (Wuxi) Co., Ltd., Jiamusi Motor Co., Ltd. CRRC Zhuzhou Motor Co., Ltd., CRRC Yongji Motor Co., Ltd., Siemens (China) Co., Ltd., Zhejiang Hulong Technology Co., Ltd. Harbin Institute of Electrical Machinery. The main drafters of this standard. Wang Chuanjun, Jin Weiwei, Wang Qingdong, Yang Zhonglu, Lu Jinsheng, Xue Shoudong, Wu Yanhong, Chen Xiangen, Pu Tianqing, Nursery rhymes. The previous versions of the standards replaced by this standard are. ---GB/T 25442-2010. Rotating motors (except traction motors) determine losses and Efficiency test method1 ScopeThis standard specifies the method for determining the efficiency of the test and specifies the test method for obtaining various losses. This standard applies to all DC motors, AC synchronous motors and induction motors within the scope of IEC 60034-1. Note. This method is also applicable to other types of rotating electrical machines, such as rotary converters, AC commutator motors and single-phase induction motors.2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. IEC 60027-1 Letter symbols for electrotechnical purposes - Part 1. General (Lettersymbolstobeusedinelectricaltech- nology-Part 1.General) IEC 60034-1.2010 Rotating electrical machines - Part 1. Quantitative and performance (Rotating electrical machines - Part 1 Ratingandperformance) Rotating electrical machines - Part 4. Test methods for parameters of synchronous motors (Rotating electricalalma- chines-Part 4. Methodsfordeterminingsynchronousmachinequantitiesfromtests) Rotating electrical machines - Part 19. Particular test methods for normal s Tatingelectricalmachines-Part 19.Specifictestmethodsford.c.machinesonconventionalandrecti- Fier-fedsupplies) IEC 60034-29 Rotating electrical machines - Part 29. Equivalent load and superimposed test technique. Indirect method for determining the temperature rise of rotating electric machines (Ro- Tatingelectricalmachines-Part 29. Equivalentloadingandsuperpositiontechniquesindirecttesting Todeterminetemperaturerise) IEC 60051 (all parts) Direct acting analog indicator electrical measuring instruments and their accessories [Directactingindicating Analogyelectricalsuringinstrumentsandtheiraccessories] IEC 60051-1 Direct-acting analog indications - Electrical measuring instruments and their accessories - Part 1. Definitions and general requirements (Directacting Indicatinganalogueelectricalmeasuringinstrumentsandtheiraccessories-Part 1.Definitionsand Generalrequirementscommontoalparts)3 Terms and definitionsThe following terms and definitions as defined by IEC 60034-1 and IEC 60051-1 apply to this document. 3.1 Efficiency efficiency The ratio of output power to input power expressed in the same unit is called efficiency and is usually expressed as a percentage. 3.2 Directly determine efficiency directefficiencydetermination Efficiency is determined by directly measuring the input power and output power of the motor. 3.3 Dynamometer dynamometer A device for measuring torque and speed at the rotating part of the motor under test. It can measure and display torque and speed. Its structure is not limited. In the form of a bracket, an inline torque sensor can also be mounted on the shaft end of the motor under test to directly measure torque. 3.4 Dynamometer test dynamometertest When the motor is running as a motor, the dynamometer is used to determine its mechanical output power; when the motor is used as a generator, the dynamometer is used to determine Its mechanical input power. 3.5 Dual power supply tow test dual-supplyback-to-backtest Two identical motors are mechanically coupled together, based on the electrical input power of one motor and the electrical output power of the other motor The difference is used to calculate the total loss of the two motors. 3.6 Indirectly determine efficiency indirectefficiencydetermination Determine the efficiency by measuring the motor input power (or output power) and total loss. If the input power is measured, the output power Equal to the input power minus the total loss; if the output power is measured, the input power is equal to the output power plus the total loss. 3.7 Single power supply tow test single-supplyback-to-backtest Two identical motors are mechanically coupled together and connected to the same power supply. The power absorbed from the power supply is the total of the two motors. loss. 3.8 No load test no-loadtest When the motor is operated as a motor, there is no effective mechanical power output test at the shaft end; when the motor is operated as a generator, the outlet end is open. Road test. 3.9 Zero power factor test (synchronous motor) zeropowerfactortest(synchronousmachine) The synchronous motor runs at no load under over-excitation and keeps the power factor close to zero. 3.10 Equivalent circuit method test (induction motor) equivalentcircuitmethod(inductionmachine) A test method for determining motor loss using the equivalent circuit method. 3.11 Take out the rotor test and the reverse test (induction motor) testwithrotorremovedandreverserotationtest(induction Machine) The load stray loss of the motor is obtained by the test of taking out the rotor and the reversal test of the rotation of the rotor against the direction of the rotating magnetic field of the stator. 3.12 Short circuit test (synchronous motor) short-circuittest(synchronousmachine) The motor operates as a generator and is short-circuited at its outlet end for testing. 3.13 Stall test lockedrotortest Test when the rotor is blocked from rotating. 3.14 Eh-star test Eh-startest The motor is star-connected and tested for operation at unbalanced voltages. 3.15 Loss losses 3.15.1 Total loss totallosses PT The difference between input power and output power is equivalent to constant loss (see 3.15.2), load loss (see 3.15.4), load stray loss (see 3.15.5) and the sum of the excitation loop losses (see 3.15.3). 3.15.2 Constant loss constantlosses It consists of wind friction and iron consumption. Although the constant loss varies with voltage and load, this standard still uses this historical habit. title. 3.15.2.1 Constant loss constantlosses PC The sum of iron loss and wind friction. 3.15.2.2 Iron loss ironlosses Pfe Losses in the effective core and no-load stray losses in other metal parts. 3.15.2.3 Wind friction frictionandwindagelosses Pfw 3.15.2.3.1 Friction loss Losses due to friction (bearings that are not lifted under bearings and rated conditions) do not include losses in independent lubrication systems. 3.15.2.3.2 Wind resistance loss windagelosses Total loss due to aerodynamic friction of all components of the motor, including the fan mounted on the shaft and the auxiliary motor integrated with the motor The power absorbed by the machine. Note 1. The loss values of the independent ventilation system should be listed separately. Note 2. For direct or indirect hydrogen cooled motors, see IEC 60034-1. 3.15.3 Excitation circuit loss excitationcircuitlosses 3.15.3.1 Excitation circuit loss excitationcircuitlosses Pe Excitation winding losses (see 3.15.3.2), exciter losses (see 3.13.3.3) and synchronous motor brushes (if any) electrical losses (see The sum of 3.15.3.5). 3.15.3.2 Excitation winding loss excitationwindinglosses Pf It is equal to the product of the exciting current Ie and the exciting voltage Ue. 3.15.3.3 Exciter loss exciterlosses PEd The exciter losses for different excitation systems (see Appendix B) are specified as follows. a) Shaft exciter The exciter loss is equal to the power absorbed from the exciter shaft (excluding wind friction) plus the excitation of the excitation winding from the excitation source. The power P1E is subtracted from the active power output from the exciter output. The active power output from the output of the exciter is equal to 3.15.3.2 Determine the field winding loss plus the brush power loss as determined in 3.15.3.5 (for synchronous motors). Note 1. If the exciter can be disengaged and tested separately, the loss can be determined according to 7.1.3.2.1. Where the exciter is excited by an independent auxiliary power source, this exciter The loss of the auxiliary power supply is also included in the loss unless the loss has been included in the auxiliary loss of the host. b) Brushless exciter The exciter loss is equal to the power absorbed by the shaft end of the exciter, and the wind friction is deducted (such as related tests on the main unit and the excitation unit). The upper magnetic field winding or stator winding (for the inductive exciter) is absorbed from the independent power source (if any), the electric power P1E, minus the exciter The active power provided at the output of the rotary rectifier. Note 2. If the exciter can be disconnected from the individual test, the loss can be determined according to 7.1.3.2.1. Where the exciter is excited by an independent auxiliary power source, the damage of the exciter The consumption also includes the loss of the auxiliary power supply, unless this loss has been included in the auxiliary loss of the host. c) Independent rotary exciter Exciter loss is the power absorbed by the drive motor plus the power absorbed by the independent auxiliary power supply (including the drive provided by the independent power supply) The power of the dynamic winding of the driven and driven motor) is the difference between the excitation output power determined in 3.15.3.2 and 3.15.3.4. excitation Machine losses can be determined in accordance with 7.1.3.2.1. d) Static excitation system (static exciter) The excitation system loss is equal to the electric power absorbed by the excitation system from the power supply plus the power provided by the independent auxiliary power supply and according to 3.15.3.2 And the difference between the excitation output power specified in 3.15.3.4. Note 3. If the system is powered by a transformer, the exciter losses also include the losses of this transformer. e) Auxiliary winding excitation (auxiliary winding exciter) Exciter losses are the sum of the copper losses of the auxiliary (secondary) windings and the additional iron losses due to the harmonic flux increments. Additional iron loss is supplemented The loss of the winding when loading and when there is no load. Note 4. Since it is difficult to separate the loss of the excitation components, it is recommended to treat these losses as part of the overall stator loss when determining all losses. For c) and d), the internal losses of the excitation power supply (if any), the connection between the power supply and the brush (synchronous motor) or the power supply and excitation are not considered. Loss of the connecting line between the magnetic winding ends (DC motors). Excitation is provided by the system consisting of the units described in b) to e), and the exciter losses shall include the associated losses in the types listed in Appendix B. 3.15.3.4 He excitation excitation power separatelylysuppliedexcitationpower P1E The excitation power P1E of the independent power supply is. --- a) and b) exciter excitation power (DC or synchronous exciter) or stator winding input power (inductive exciter), including Part of the exciter loses PEd (the loss is greater in the induction exciter), and most of the Pe is supplied through the shaft; --- c) and d) type of exciter, equal to the excitation loop loss, P1E = Pe; ---e) Exciter, P1E=0, the excitation power is completely provided by the shaft, and for the permanent magnet motor, the same P1E=0. The type of exciter is specified in 3.15.3.3. 3.15.3.5 Brush power loss (excitation circuit) brushlosses(excitationcircuit) Pb The electrical losses (including brush contact loss) of the excitation of the synchronous motor brush. 3.15.4 Load loss loadlosses 3.15.4.1 Load loss loadlosses PL The sum of the winding loss I2R (see 3.15.4.2) and the brush electrical loss Pb (if any) (see 3.15.4.3). 3.15.4.2 Winding loss windinglosses Equal to I2R loss, mainly generated in. ---DC motor armature circuit; ---Induction motor stator and rotor windings; --- Synchronous motor armature and field winding. 3.15.4.3 Brush power loss (load circuit) brushlosses Pb Electrical losses (including contact losses) of brushes in DC motor armature circuits and wound rotor induction motors. 3.15.5 Load stray loss (load additional loss) stray-loadlosses(additionalloadlosses) PLL The loss caused by the AC stray flux in the effective core and other metal parts when the motor is under load, and the load current in the winding conductor The eddy current loss caused by the generated magnetic flux pulsation and the additional loss of the brush caused by the commutation. Note. These losses do not include the no-load stray loss described in 3.15.2.2. 3.15.6 Short circuit loss short-circuitlosses PK Current-induced loss when the synchronous motor and the DC motor armature winding are short-circuited. 3.16 Test value (multiphase AC motor) testquantities(polyphasea.c.machine) 3.16.1 Terminal voltage terminalvoltage The arithmetic mean of the line voltage of a multiphase AC motor. 3.16.2 Line current linecurrent The arithmetic mean of the line current of a multiphase AC motor. 3.16.3 Terminal resistance line-to-lineresistance The arithmetic mean of the resistance measured at each pair of terminals of a multiphase AC motor. Note 1. For the Y-connected three-phase motor, the phase resistance is 0.5 times the terminal resistance; if it is the △ connection method, the phase resistance is 1.5 times the terminal resistance. Note 2. All notes and formulas in Chapters 6 and 7 refer to three-phase motors unless otherwise noted. 3.16.4 Temperature rise The temperature of the cooling medium (coolant) is subtracted from the motor temperature specified in IEC 60034-1.4 symbols and abbreviations4.1 symbol The following symbols apply to this document. 1) In the case of sinusoidal voltage and current. 2) In the tests described in this document, P1 and P2 refer to input electrical power and output mechanical power, respectively, unless otherwise noted. Cosφ power factor 1 ). f Frequency in Hertz (Hz). The average value of the I line current in amps (A). Kθ temperature correction factor. n Operating speed in revolutions per second (r/s). p pole logarithm. P power in watts (W). P0 No-load input power in watts (W). P1 input power, excluding excitation power 2), in watts (W). P2 output power in watts (W). Pb Brush power loss in watts (W). Pe excitation loop loss in watts (W). P1E Excitation power, in watts (W). PEd exciter losses in watts (W). Pel electric power, except excitation power, in watts (W). Pf Excitation (magnetic field) winding loss in watts (W). Pfe Iron consumption in watts (W). Pfw wind consumption, in watt......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 25442-2018_English be delivered?Answer: Upon your order, we will start to translate GB/T 25442-2018_English as soon as possible, and keep you informed of the progress. The lead time is typically 6 ~ 10 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 25442-2018_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 25442-2018_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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