Railway applications—Rolling stock—Combined testing—Part 3:Combined testing of alternating current motors fed by an indirect converter and their control system
1 Scope
This part applies to the combinations of motor(s), indirect convertors and their control system and its object is to specify:
— the performance characteristics of electric drives consisting of a convertor, alternating current motors, and the related control system;
— methods of verifying these performance characteristics by tests.
Two categories of combined systems can be considered:
a) Alternating current motors fed from a convertor without any control between the mechanical output (torque, speed) and the convertor itself (mostly auxiliary motors, for example cooling fan motors). The motor works exactly as if it were fed from a busbar (at variable frequency and voltage or not).
b) Alternating current motor(s) (paralleled or not) with a control between the mechanical output and the inverter.
The first category of systems is tested according to GB/T 25123.2-2010 and GB/T 25122.1-2010.
This part applies to the second category, mainly traction drives.
GB/T 25123.2-2010 applies to convertor-fed alternating current motors, GB/T 25122.1-2010 to power electronic convertors; GB/T 25119-2010 applies to electronic equipment; this standard applies to the combination of motor(s), convertors, and their control system. As a consequence, GB/T 25123.2-2010 describes the tests to demonstrate the compliance of the motor to its specification, GB/T 25122.1-2010 does the same for the convertor. It is self-evident that some of the tests mentioned in this standard may in general replace the corresponding ones described in the above mentioned standards. An agreement should be reached between the parties to avoid the duplication of tests.
A complete combined test is heavy, and often requires high power, which is not always available in workshop. An agreement between user and manufacturer may be reached to allow testing either in the workshop or on the vehicle.
At the time of drafting of this standard, only the following combinations of motors and inverters have been used for traction applications, but it may also apply to other combinations which may be used in the future:
— asynchronous motors fed by voltage stiff (voltage source) inverter;
— asynchronous motors fed by current stiff (current source) inverter;
— synchronous motors fed by current stiff (current source) inverter.
The input of these inverters (see figure 2) can be a d.c. supply line or an intermediate d.c. link, which can be obtained from an a.c. line by means of a rectifier (2.2.1 of GB/T 25122.1-2010) or from a d.c. line by means of a chopper (2.2.2 of GB/T 25122.1-2010) or from autonomous supplies (such as on-board generators, accumulators or other electric energy sources) (1.1 of GB/T 25122.1-2010).
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2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 25117. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 2900.25-2008 Electrotechnical terminology — Rotating electrical machines (IEC 60050-411:1996, International electrotechnical vocabulary — Part 411: Rotating electrical maehines + Amd 1:2007, IDT)
GB/T 2900.33-2008 Electrotoechnical terminology — Power electronics (IEC 60050-551:1998, International electrotechnical vocabulary — Part 551: Power electronics, IEC 60050-551-20:2001, International elec-trotechnical vocabulary — Part 551-20: Power electronics — Harmonic analysis, IDT)
GB/T 2900.36-2003 Electrotechnical terminology — Electric traction (IEC 60050-811:1991, MOD)
GB/T 25119-2010 Railway applications — Electronic equipments used on rail vehicles (GB/T 25119-2010:2006, Electronic equipments used on rail vehieles, MOD)
GB/T 25122.1-2010 Railway applications — Power convertors installed on board rolling stock — Part 1: Characteristics and test methods (GB/T 25122.1-2010:2005, MOD)
GB/T 25123.2-2010 Railway applications — Power convertors installed on board rolling stock — Part 2: Additional technical information (GB/T 25123.2-2010:2002, MOD)
IEC 60850 Railway applications — Supply voltage of traction systems
3 Terms and Definitions
Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 Environmental Conditions
5 Combined System Characteristics
5.1 Specified characteristics
5.2 Declared characteristics
5.3 Combined system characteristics
5.4 Exchange of information and responsibility
6 Test Categories
6.1 General
6.2 Type tests
6.3 Investigation tests
7 Tests
7.1 General
7.2 Test conditions
7.3 Temperature-rise tests
7.4 Additional test for paralleled asynchronous motors
7.5 Characteristic tests and tolerances
7.6 Miscellaneous tests
7.7 Investigation tests
7.8 Test item
Appendix A (Informative) Comparison between Chapter and Article Numbers of This Part and Those of IEC 61377-3:2002
Appendix B (Informative) Agreement between User and Manufacturer
Bibliography
