1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.TO PLACE A DOCUMENT ORDER; (412) 776-4970 FAX: (412) 776-0790http:www.sae.orgCopyright 1
3、996 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICESubmitted for recognition as an American National StandardJ544REV.AUG96Issued 1945-01Revised 1996-08Superseding J544 MAR88(R) ELECTRIC STAR
4、TING MOTOR TEST PROCEDUREForewordPrior to 1981, SAE J544 addressed both starting motor and generator performance curves. Review ofthis technical report for improvement indicated that a recommended test procedure for development of theperformance curves was needed and that starting motors and generat
5、ors should be addressed in separate SAEtechnical reports. The generator performance curve information is now contained in SAE J56. The SAE J544identity has been retained for testing the output performance and plotting the performance curves of startingmotors.1. ScopeThis SAE Recommended Practice pro
6、vides a standard procedure for testing the output performanceand plotting the performance curve of electric starting motors, and a graphical method of determining enginecranking speed.2. References2.1 Applicable PublicationsThe following publications form a part of this specification to the extent s
7、pecifiedherein. Unless otherwise indicated, the latest issue of SAE publications shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J56Electrical Generating System (Alternator Type) Performance Curve and Test ProcedureSAE J1253Low Temperature
8、Cranking Load Requirements of an Engine3. Testing ProcedureThe motor shall be mounted in a test stand as shown in Figure 1. For larger startingmotors, the torque may be measured directly at the motor axis with a special test end frame because of torquelimitation of test equipment. The torque measure
9、ment may be recorded and should be identified on theperformance curve as either a frame reaction at the motor axis or at the torque loading point shown inFigure1.NOTE If the latter test method is used, the effect of inertia should be taken into account.Copyright SAE International Provided by IHS und
10、er license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J544 Revised AUG96-2-FIGURE 1TYPICAL TEST SET-UUP FOR STARTING MOTORSPerformance curves are established by running the starting motor in one of two methods. Method A is plottinga curve from discre
11、te points while Method B is achieved by operating the motor in a continuous mode while theoutput is automatically recorded and/or plotted. Deviations from either of these two methods shall be noted onthe performance curve. When a solenoid is used for meshing the starting motor pinion gear with the f
12、lywheelring gear, the applied voltage and total current draw shall include the solenoid and be noted on theperformance curve.3.1 Test Method ARun the starting motor at various discrete torque loads and record the voltage, torque,current, and speed. The terminal voltage is preferably adjusted to a vo
13、ltage curve selected from Table 1. Thevoltage curve selected shall not exceed the recommendation of the motor manufacturer. Enough points shallbe recorded to develop a curve. The points shall be plotted and the curves developed as shown in Figure 2.Cooling intervals between each test point shall be
14、made to insure that the effects of temperature changes arenegligible. Ambient test temperature shall be noted on the performance curve.TABLE 1RECOMMENDED TERMINAL VOLTAGE CURVESFOR STARTING MOTOR TESTSCurve NameCurve Data(1)Volts atOpen Circuit1. The terminal voltage curve is a straight line defined
15、 by the data pointsCurve Data(1)Volts atAmperes24V Heavy-Duty 24 16 at 100024V Standard-Duty 24 12 at 60012V High Output 12 10 at 100012V Extra Heavy-Duty 12 8 at 100012V Heavy-Duty 12 6 at 100012V Medium-Duty 12 6 at 60012V Standard-Duty 12 6 at 4006V Standard-Duty 6 2 at 800Copyright SAE Internati
16、onal Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J544 Revised AUG96-3-FIGURE 2STANDARD FORM FOR STARTING MOTOR CHARACTERISTIC CURVES3.2 Test Method BOperate the starting motor continuously, increasing torque load from no
17、load to stall. Theterminal voltage is preferably maintained to a voltage curve selected from Table 1. The voltage curve selectedshall not exceed the recommendation of the motor manufacturer. Plotting equipment is used to record thevoltage, torque, current, and speed as shown in Figure 2. The loading
18、 rate is to be such that the effect oftemperature change is negligible. Ambient test temperature shall be noted on the performance curve.4. InstrumentationThe voltmeter and the ammeter shall have an accuracy of 1% of the full scale reading (fullscale value not to exceed the maximum performance readi
19、ng by more than 50%). The speed sensing deviceand torque measuring device shall have an accuracy of 1% of the actual reading.5. Graphical Method of Determining Engine Cranking SpeedWith the starting motor performance curvegenerated by the previous procedure and a cranking demand curve developed for
20、a particular engine(Reference: SAE J1253) the cranking speed can be determined by using the graphical method shown inFigure3.The starting motor performance curve may need to be corrected for temperature and terminal voltagesexpected on the actual application. The motor performance corrections can be
21、 obtained from the motormanufacturer.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J544 Revised AUG96-4-FIGURE 3METHOD OF DETERMINING CRANKING SPEEDS6. Notes6.1 Marginal IndiciaThe change bar (l)
22、 located in the left margin is for the convenience of the user in locatingareas where technical revisions have been made to the previous issue of the report. An (R) symbol to the leftof the document title indicates a complete revision of the report.PREPARED BY THE SAE CRANKING MOTOR STANDARDS COMMIT
23、TEECopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J544 Revised AUG96RationaleSAE J544 has been revised to reflect the test method most used by industry. It was alsoreformatted to comply with the S
24、AE Technical Standards Board format.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Recommended Practice provides a standard procedure for testing the outputperformance and plotting the performance curve of electric starting motors, and a graphical method ofdetermining
25、 engine cranking speed.Reference SectionSAE J56Electrical Generating Systems (Alternator Type) Performance Curve and Test ProcedureSAE J1253Low Temperature Cranking Load Requirements of an EngineDeveloped by the Developed by the SAE Cranking Motor Standards CommitteeCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-
