JSA - JIS E 5011-1
Rolling stock - Combined testing of power convertor with ac motors - Part 1: Inverter system
|Publication Date:||20 April 2009|
|ICS Code (Railway rolling stock in general):||45.060.01|
This Standard applies to the combinations of ac motor(s), inverter and their control system, and its object is to specify:
- the performance characteristics of electric drives consisting of an inverter, 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 motor(s) fed from an inverter without any control between the mechanical output (torque, speed) and the inverter 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 systems of category a) is tested according to JIS E 5008 and JIS E 6102.
This Standard applies to the category b), mainly traction drives (see figure 1).
JIS E 6102 applies to convertor-fed alternating current motors, JIS E 5008 to power electronic convertors, JIS E 5006 to electronic equipments, and this Standard applies to the combination of ac motor(s), inverter, and their control system. As a consequence, JIS E 6102 describes the tests to demonstrate the compliance of the motor to its specification, JIS E 5008 does the same for the inverter. It is self-evident that some of the tests mentioned in this Standard generally may replace the corresponding ones described in the above-mentioned standards. An agreement should be reached between the user and the manufacturer (hereafter referred to as "the interested parties") to avoid the duplication of tests (see, for example, the "possible duplication of test" column in table 1).
A complete combined test is heavy, and often requires high power, which is not always available in a workshop. An agreement between the interested parties may be reached to allow testing either in the workshop or on the vehicle. Testing may be split off partially in a workshop and partially on track.
At the time of drafting this Standard, only the following combinations of motors and inverters were used for traction applications, but it may also apply to other combinations which may be used in the future :
a) asynchronous motors fed by voltage stiff (voltage source) inverter;
b) synchronous motors fed by voltage stiff (voltage source) inverter;
c) asynchronous motors fed by current stiff (current source) inverter;
d) synchronous motors fed by current stiff (current source) inverter.
The input of these inverters can be a d.c. supply line, a rectifier, a chopper, an input convertor, a diesel generator with integrated rectifiers, etc.
NOTE 1 An inverter is "a device to convert dc input energy directly into ac output energy".
NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows:
lEC 61377-1 : 2006 Rallway applications - Rolling stock - Part 1 Combined testing of inverter-fed alternating current motors and their con trol system (MOD)
The symbols which denote the degree of correspondence in the contents between JIS and the corresponding International Standard are IDT (identical), MOD (modified) and NEQ (not equivalent) according to ISO/lEC Guide 21.