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.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1998 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001STANDARDSubmitted for recognition as an American National StandardJ831RE
4、I.MAR1998Issued 1962-06Reissued 1998-03Superseding J831JUL96CANElectrical DefinitionsForewordThis document was canceled in 1996 and just recently reissued. It has been revised during this time.1. ScopeThis SAE Standard contains the industry standard definitions for electrical equipment used in thege
5、neration of electric power onboard todays conventional road vehicles. It is intended to complement theelectronic terminology that was formerly documented in SAE J1213 (canceled) and/or in other industryglossaries of electrical/electronic devices. 2. References2.1 Applicable PublicationsThe following
6、 publications form a part of the specification to the extent specifiedherein. Unless otherwise indicated, the latest revision of SAE publications shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J56Electrical Generating System (Alternator Ty
7、pe) Performance Curve and Test ProcedureSAE J1213 (Canceled)2.2 Related PublicationsThe following publications are provided for information purposes only and are not arequired part of this document, they were used for reference.2.2.1 SAE PUBLICATIONAvailable from SAE, 400 Commonwealth Drive, Warrend
8、ale, PA 15096-0001.SAE TSB 003Rules For SAE Use of SI (metric) Units2.2.2 OTHER PUBLICATIONSIEEE DictionaryStandard English Language Dictionaries3. Definitions3.1 General3.1.1 ALTERNATING CURRENTElectric current that reverses direction periodically, usually many times per second.Abbreviated AC.SAE J
9、831 Reissued MAR1998-2-3.1.2 ALTERNATING VOLTAGEElectric potential that reverses direction periodically, usually many times persecond.3.1.3 DIRECT CURRENT Electric current that flows in one direction only, as opposed to alternating current.Abbreviated DC.3.1.4 ELECTRICContaining, producing, arising
10、from, actuated by, or carrying electricity and capable of doing so.Examples: electric motor, energy, vehicle. This was referenced from the IEEE definition. See electrical.3.1.5 ELECTRICALRelated to, pertaining to, or associated with electricity, but not having its properties orcharacteristics. Examp
11、les: electrical engineer, electrical handbook, insulator, rating, school, unit.NOTESome dictionaries indicate electric and electrical as synonymous but usage in the electricalengineering field has in general been restricted to the meanings given in the definitions previously. Itis recognized that th
12、ere are borderline cases wherein the usage determines the selection. This wasreferenced from the IEEE definition. See electric.3.1.6 ELECTRONICAny device or system in which electrons flow through a vacuum, gas, or semiconductor (seeSAE J1213).3.1.7 ELECTRIC CURRENTThe flow of electric charge. The pr
13、eferred unit is the ampere (A).3.1.8 ELECTRIC POWERThe rate at which electric energy is transferred, or generated from, or converted to otherforms of energy. It is expressed in watts (W) and is equal to the product of the current in amperes and thevoltage in volts.3.1.9 ELECTRIC ENERGYElectric energ
14、y is the time integral of electric power, and is expressed in joules(wattseconds) when the voltage is in volts, the current is in amperes, and the time interval is in seconds.This was referenced from the IEEE definition.3.2 Electric Power Generation3.2.1 GENERATORA rotating electromagnetic machine t
15、hat converts mechanical power into electric power, with afrequency determined by the speed of the machine.3.2.2 DC GENERATORA generator that produces DC electric power. It may produce DC by any means, includingthe use of rectifier diodes or a commutator with brushes.3.2.3 ALTERNATORIn non-automotive
16、 applications, an alternator is a generator that produces AC electric power.In automotive applications, the generator is commonly referred to as an alternator because it first producesAC electric power which is converted to DC by diode rectification.3.2.3.1 Lundell MachineThe type of generator used
17、in automotive applications, otherwise known as a claw-poletype. It uses a single field coil embedded inside a claw-pole-shaped rotor to establish a multi-polar bi-directional field. The stator has a multi-phase winding which is connected to a diode bridge for full-waverectification. The DC output vo
18、ltage is controlled by regulating the field current.3.2.3.2 Brushless AlternatorAn alternator which does not use a brush, slip ring, or commutator to transmitelectric current to its rotating component. Electromagnetic coupling is employed with its rotatingcomponent to generate electric power.3.2.3.3
19、 Permanent Magnet AlternatorAn alternator which employs permanent magnets as the principal sourceof magnetic flux used to generate electric power.SAE J831 Reissued MAR1998-3-3.2.4 RATED OUTPUTRated generator output current is the output current produced at rated voltage, temperature,and speed. See S
20、AE J56 for more details.3.3 Recommended Format For Commonly Used Engineering TermsCurrent ampere, AVoltage volt, VPower watt, WEnergy joule, JResistance ohm, Capacitance farad, FFrequency hertz, HzRotational speed rpmMass kilogram, kgForce newton, NLength meter, mTime second, s4. Notes4.1 Marginal I
21、ndiciaThe change bar (l) 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 VEHICLE
22、 ELECTRICAL POWER SUPPLYSYSTEMS STANDARDS COMMITTEESAE J831 Reissued MAR1998RationaleThe content of this SAE Standard is revised or has been added as new information. Sections ongeneral electric power related terms and recommended format for engineering terms are added. Thesection on generating mach
23、ine definitions has been brought up-to-date and has had new technologiesadded to keep the document current.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Standard contains the industry standard definitions for electrical equipment used inthe generation of electric pow
24、er onboard todays conventional road vehicles. It is intended tocomplement the electronic terminology that was formerly documented in SAE J1213 (canceled) and/or inother industry glossaries of electrical/electronic devices. Reference SectionSAE J56Electrical Generating System (Alternator Type) Performance Curve and Test ProcedureSAE J1213 (Canceled)SAE TSB 003Rules For SAE Use of SI (metric) UnitsIEEE DictionaryStandard English Language DictionariesDeveloped by the SAE Vehicle Electrical Power Supply Systems Standards Committee
