GB/T 25123.2-2018: Electric traction -- Rotating electrical machines for rail and road vehicles -- Part 2: Electronic convertor-fed alternating current motors

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Scope

1.1 General
This Part of GB/T 25123 applies to converter-fed alternating current motors forming part of the
equipment of electrically propelled rail and road vehicles.
The object of this part is to enable the performance of a motor to be confirmed by tests and to
provide a basis for assessment of its suitability for a specified duty and for comparison with
other motors.
Where further testing is to be undertaken in accordance with GB/T 25117.1 and GB/T 25771.3,
it may be preferable, to avoid duplication, that some type and investigation tests be carried out
on the combined test bed.
Particular attention is drawn to the need for collaboration between the designers of the motor
and its associated converter as detailed in 5.1.
NOTE 1: This part also applies to motors installed on trailers hauled by powered vehicles.
NOTE 2: The basic requirements of this part may be applied to motors for special purpose vehicles such
as mine locomotives but this part does not cover flameproof or other special features that may be required.
NOTE 3: It is not intended that this part should apply to motors on small road vehicles, such as battery-
fed delivery vehicles, factory trucks, etc. This part also does not apply to minor machines such as
windscreen wiper motors, etc. that may be used on all types of vehicles.
NOTE 4: Industrial type motors complying with GB/T 755 may be suitable for some auxiliary drives,
providing that it is demonstrated that operation on a converter supply will meet the requirements of the
particular application.
1.2 Special consideration on rating of parallel powered traction motors
The rating of traction motors fed in parallel by a common converter has to take into account the
effect on load-sharing of differences of wheel diameter and of motor characteristics as well as
weight transfer when operating at high coefficients of adhesion. The user is to be informed of
the maximum permissible difference in wheel diameter for the particular application.
1.3 Power supply
The electrical input to motors covered by this Part comes from an electronic converter.
NOTE: At the time of drafting, only the following combinations of motors and converters had 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 source converters;
– asynchronous motors fed by current source converters;
– synchronous motors fed by current source converters.
1.4 Type of motors
The motors covered by this part are classified as follows:
a) Traction motors – Motors for propelling rail or road vehicles.
b) Auxiliary motors not covered by GB/T 755 – Motors for driving compressors, fans,
auxiliary generators or other auxiliary machines.

Basic Data

Standard ID	GB/T 25123.2-2018 (GB/T25123.2-2018)
Description (Translated English)	Electric traction -- Rotating electrical machines for rail and road vehicles -- Part 2: Electronic convertor-fed alternating current motors
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	S35
Classification of International Standard	29.280
Word Count Estimation	34,387
Date of Issue	2018-06-07
Date of Implementation	2019-01-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration