This part of GB/T 25123 applies to convertor-fed alternating current motors for propelling 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 25117.3, 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 convertor 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 explosion-proof 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 motors 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 convertor supply will meet the requirements of the particular application.
1.2 Special considerations for the rating of traction motors fed in parallel
The rating of traction motors fed in parallel by a common convertor 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 coefficient 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 convertor.
Note: At the time of drafting, only the following combinations of motors and convertors 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 convertors;
——asynchronous motors fed by current source convertors;
——synchronous motors fed by current source convertors.
1.4 Motor types
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.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 755 Rotating electrical machines - Rating and performance (GB/T 755-2008, IEC 60034-1:2004, IDT)
GB/T 1402 Railway applications - Supply voltages of traction systems (GB/T 1402-2010, IEC 60850:2007, MOD)
GB/T 1971 Rotating electrical machines - Terminal markings and direction of rotation (GB/T 1971-2006, IEC 60034-8:2002, IDT)
GB/T 2900.25 Electrotechnical terminology - Rotating electrical machines (GB/T 2900.25-2008, IEC 60050-411:1996, IDT)
GB/T 2900.36 Electrotechnical terminology - Electric traction [GB/T 2900.36-2003, IEC 60050(811):1991, MOD]
GB/T 2900.74 Electrotechnical terminology - Circuit theory (GB/T 2900.74-2008, IEC 60050-131:2002, MOD)
GB/T 2900.83 Electrotechnical terminology - Electrical and magnetic devices (GB/T 2900.83-2008, IEC 60050-151:2001, IDT)
GB/T 10068 Mechanical vibration of certain machines with shaft heights 56 mm and higher - Measurement, evaluation and limits of vibration severity (GB/T 10068-2008, IEC 60034-14:2007, IDT)
GB/T 11021 Electrical insulation - Thermal evaluation and designation (GB/T 11021-2014, IEC 60085:2007, IDT)
GB/T 25117.1 Railway applications - Rolling stock - Combined testing - Part 1: Combined testing of inverter-fed alternating current motors and their control system (GB/T 25117.1-2010, IEC 61377-1:2006, IDT)
GB/T 25117.3 Railway applications - Rolling stock - Combined testing - Part 3: Combined testing of alternating current motors fed by an indirect converter and their control system (GB/T 25117.3-2010, IEC 61377-3:2002, MOD)
GB/T 32347.1-2015 Railway applications - Environmental conditions for equipment - Part 1: Equipment on board rolling stock (IEC 62498-1:2010, MOD)
3 Terms and definitions
GB/T 25123.2-2018 The following standards are cited：
