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1、INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXAYHAPOAHAA OPrAHHSAklR IlO CTAHAAPTM3AMM Road vehicles - Alternators with regulators - Test methods and general requirements Whicules routiers - Alternateurs avec rdgulateur - Mbhode
2、s dessai et conditions g 27 f 0,2 V for 24 V systems. 1 -,-,- IS0 8854 : 1999 (El 4 Test equipment connection diagram For alternator tests, connections shall be made in accordance with figure 1. The voltmeter shall be connected direct to the alternator power output terminals. The connecting cables u
3、sed shall be adequate for the output of the alternator under test. In the case of a separate regulator, their lengths shall be recorded. 5 Measurement procedure 5.1 Current/rotational frequency characteristic 5.1.1 Warm tests 5.1.1.1 Rotational frequencies and measuring points Current measurement sh
4、all be taken at the following rotational frequencies (in minutes to the power minus one); the tempera- ture of the stator shall be allowed to reach equilibrium at each individual frequency before current values are recorded : 2 A-rotational frequency (= 1 000) - 1 500 - 2 060 - 2500-33-3500-4000-500
5、0-66ooo-99 - 12 000 - nmax The current/rotational frequency characteristic is indicated by the following five points : a) Cut-in frequency, nA Increase the alternator rotational frequency until the charge indicator system indicates the commencement of battery charging, and record this frequency. The
6、 value of charge indicator influences the cut-in fre- quency and its value shall be agreed between the alternator manufacturer and the vehicle manufacturer. External excitation if required r -_ 1 Alternator with integral or separate regulator b) Zero-amp. frequency, no (indirect measurement) Reduce
7、the alternator rotational frequency until an alter- nator output current between 5 % of Za and 2 A, but not less than 2 A, is reached. Record frequency and current for graphic determination of the zero-amp. frequency : i.e. the zero-amp. speed is determined by extension of the current/ rotational fr
8、equency characteristic until the abscissa is intersected. This graphic extrapolation shall be made after completing the measurements. c) Minimum application current, IL Adjust the alfernator rotational frequency to nL = 1 600 min-, and record the alternator output current (defined as being the minim
9、um application current IL). d) Rated current, IR Adjust the alternator rotational frequency to nR = 6 000 min-I, and record the alternator output cur- rent (defined as being the rated current Ia). e) Maximum current, Z, Adjust the alternator rotational frequency to nmax as specified by the alternato
10、r manufacturer, and record the alternator output current (defined as being the maximum current &,I. 5.1.1.2 Characteristic of power absorbed (drive power) and efficiency The power absorbed by the alternator shall be calculated at the measuring points shown in 5.1.1.1. If so desired, the efficiency o
11、f the alternator may be calculated and recorded. Charge indicator according We Figure 1 - Diagram for alternator testing IS0 66!54 : 1966 (El 51.2 Short form tests 5.1.2.1 Short form warm test The alternator under test shall be warmed up for 30 min at 3 000 min-. It is however permissible to reduce
12、this time if it can be shown that the temperature which would be reached after 30 min has been attained in a shorter period. The voltage shall be constant and equal to the test voltage U, during the warm-up and the measuring period. After the warm-up period, the rotational frequency shall be reduced
13、 until the current is between 2 A and 0,05 IR. Record current and rotational frequency. Current measurements shall be taken at least at the following rotational frequency values (in minutes to the power minus one) : 1500-2000-COO- 4000-6000-9000- 12 ooo - nmax If so desired, further intermediate val
14、ues may be recorded. The test time shall not exceed 30 s, with constant variation of frequency. 5.1.2.2 Short form cold test Current measurements shall be taken at least at the following rotational frequency values (in minutes to the power minus one) : 2 A-rotational frequency - 1 500 - 2 000 - 3 00
15、0 - 4 Ooo -6000-9000-12000-n, If so desired, further intermediate values may be recorded. The test time shall not exceed 30 s with constant variation of frequency. 5.2 Testing of functional ability of regulator The alternator shall be run at rated rotational frequency and rated current until the tem
16、perature of the regulator becomes stable. The load shall then be reduced to 5 A and a check made to determine that the voltage does not rise above the alternator voltage specified by the alternator manufacturer. NOTE - The setting of the regulator is specific to the vehicle manufac- turer. 6 Present
17、ation of results Measurements of current/rotational frequency and power ab- sorption characteristics shall be presented in accordance with figure 2. The tests described in 5.1.1 and 5.1.2 will produce different characteristic curves and therefore different maximum current values. The manufacturer sh
18、all indicate which test method has been used. 3 -,-,- IS0 6654 : 1988 (E) nR n max Alternator rotational frequency, n, minutes to the power minus one KfW I max Maximum current IFI Rated current IL Minimum application current nmax Maximum continuous rotational frequency as defined by the alternator m
19、anufacturer % Rated rotational frequency = 6 Ooo min -t nL Minimum application rotational frequency = 1 566 min- n0 Zero-amp. frequency P Power absorbed by the alternator at full load (torque measurement) E Efficiency Figure 2 - Presentation of results 4 IS0 6654 : 1988 (EI UDC 629.11 : 621.313.3 Descriptors : road vehicles, internal combustion engines, alternating-current generators, tests. Price based on 4 pages
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