1、PUBLISHED DOCUMENTPD CLC/TR 61800-6:2007Adjustable speed electrical power drive systems Part 6: Guide for determination of types of load duty and corresponding current ratingsICS 29.130g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55
2、g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58PD CLC/TR 61800-6:2007This Published Document was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007ISBN 978 0 580 50326 9National forewordThis Published Document
3、was published by BSI. It is the UK implementation of CLC/TR 61800-6:2007. It supersedes BS EN 61136-1:1998 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/22, Power electronics.A list of organizations represented on PEL/22 can be obtained on reques
4、t to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Amendments issued since publicationAmd. No. Date CommentsTECHNICAL REPORT CLC/TR 61800-6 RAPPORT TECHNIQUE TECHNISCHER BERICHT February 2007
5、CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved
6、worldwide for CENELEC members. Ref. No. CLC/TR 61800-6:2007 E ICS 29.130 Supersedes EN 61136-1:1995English version Adjustable speed electrical power drive systems Part 6: Guide for determination of types of load duty and corresponding current ratings (IEC/TR 61800-6:2003) Entranements lectriques de
7、puissance vitesse variable Partie 6: Guide de dtermination du type de rgime de charge et de dimensionnement en courant correspondant (CEI/TR 61800-6:2003) Elektrische Leistungsantriebssysteme mit einstellbarer Drehzahl Teil 6: Richtlinie zur Bestimmung von Lastspielarten und entsprechenden Strombeme
8、ssungen (IEC/TR 61800-6:2003) This Technical Report was approved by CENELEC on 2006-09-02. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lat
9、via, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. CLC/TR 61800-6:2007 2 Foreword The text of the Technical Report IEC/TR 61800-6:2003, prepared by SC 22G, Adjustable speed electric drive syste
10、ms incorporating semiconductor power converters, of IEC TC 22, Power electronic systems and equipment, was submitted to vote and was approved by CENELEC as CLC/TR 61800-6 on 2006-09-02. This Technical Report supersedes EN 61136-1:1995. Annex ZA has been added by CENELEC. _ Endorsement notice The tex
11、t of the Technical Report IEC/TR 61800-6:2003 was approved by CENELEC as a Technical Report without any modification. _ 3 CLC/TR 61800-6:2007 CONTENTS 1 General4 1.1 Scope and object.4 1.2 Normative references 4 2 Definitions4 3 Rated values 8 3.1 General.8 3.2 System of establishing rated current-t
12、ime values for semiconductor assemblies and equipments.10 3.2.1 General .10 3.2.2 Rated current of a common converter transformer 10 3.2.3 Rated values of a double converter 10 3.2.4 Determination of type of load duty10 3.3 Rated currents for equipments and sections.10 3.3.1 General .10 3.3.2 Rated
13、currents for uniform load duty 11 3.3.3 Rated currents for intermittent peak load duty 11 3.3.4 Rated currents for intermittent load duty.11 3.3.5 Rated currents for intermittent load duty with no-load intervals .11 3.3.6 Rated currents for repetitive load duty11 3.3.7 Rated currents for non-repetit
14、ive load duty.13 3.4 Overload and surge current capability14 4 Duty classes for non-repetitive load duty.14 Annex ZA (normative) Normative references to international publications with their corresponding European publications .16 Figure 1 Typical current-time chart for uniform load duty 5 Figure 2
15、Typical current-time chart for intermittent peak load duty 5 Figure 3 Typical current-time chart for intermittent load duty.6 Figure 4 Typical time chart for intermittent load duty with no-load intervals .6 Figure 5 Example of current-time chart for repetitive load duty .7 Figure 6 Typical current-t
16、ime chart for non-repetitive load duty.7 Figure 7 Equivalent repetitive load duty load-time chart13 Figure 8 Typical rating curves for non-repetitive load duty 14 Table 1 List of symbols 8 Table 2 Duty classes for non-repetitive industrial applications 14 CLC/TR 61800-6:2007 4 ADJUSTABLE SPEED ELECT
17、RICAL POWER DRIVE SYSTEMS Part 6: Guide for determination of types of load duty and corresponding current ratings 1 General 1.1 Scope and object This technical report provides alternative methods for specifying ratings for adjustable speed electrical power drive systems (PDS) and in particular their
18、 basic drive modules (BDM). It is not intended to cover adjustable speed drives for traction purposes. General rules for rating specification for low voltage adjustable speed d.c. power drive systems are contained in IEC 61800-1, and for low voltage adjustable frequency a.c. power drive systems in I
19、EC 61800-2. 1.2 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. IEC 60146-1-
20、1, Semiconductor convertors General requirements and line commutated convertors Part 1-1: Specifications of basic requirements IEC 61800-1, Adjustable speed electrical power drive systems Part 1: General requirments Rating specifications for low voltage adjustables speed d.c. power drive systems IEC
21、 61800-2, Adjustable speed electrical power drive systems Part 2: General requirements Rating specifications for low voltage adjustable frequency a.c. power drive systems 2 Terms, definitions and symbols 2.1 Terms and definitions For the purpose of this technical report the definitions given in IEC
22、61800-1, IEC 61800-2 and IEC 60146-1-1 as well as the following, apply. 2.1.1 equilibrium temperature steady-state temperature reached by a component of a converter under specified conditions of load and cooling NOTE Steady-state temperatures are in general different for different components. The ti
23、mes necessary to establish the steady state are also different and proportional to thermal time constants. 4 5 CLC/TR 61800-6:2007 2.1.2 current-time load chart record of load current with respect to time 2.1.3 uniform load duty duty for which a converter equipment carries a current of fixed value f
24、or an interval sufficiently long for the components of the converter to reach equilibrium temperatures corresponding to the said value of current. Figure 1 illustrates this type of load duty (see Table 1 for symbols). IbjjIatIEC 884/03Figure 1 Typical current-time chart for uniform load duty 2.1.4 i
25、ntermittent peak load duty type of duty for which loads of high magnitude and short duration are applied following no-load periods such that thermal equilibrium is reached between successive applications of the load. Figure 2 illustrates this type of load duty. The intermittent loads need not be equ
26、idistant, but the minimum value of t0to achieve no-load semiconductor temperature before the next intermittent load should be specified by the manufacturer. t0IpjjIattpIEC 885/03Figure 2 Typical current-time chart for intermittent peak load duty CLC/TR 61800-6:2007 6 2.1.5 intermittent load duty typ
27、e of duty for which intermittent loads are superimposed onto a constant base load such that thermal equilibrium is reached between successive applications of the intermittent load. Figure 3 illustrates this type of load duty. The intermittent loads need not be equidistant, but the minimum value of t
28、bto achieve steady state semiconductor temperature before the next intermittent load is applied should be specified by the manufacturer. tbIbIpjjIattpIEC 886/03Figure 3 Typical current-time chart for intermittent load duty 2.1.6 intermittent load duty with no-load intervals type of duty for which in
29、termittent no-load intervals followed by high load intervals are superimposed onto a constant base load, such that thermal equilibrium is reached between successive applications of the intermittent load. Figure 4 illustrates this type of load duty. The intermittent loads need not be equidistant, but
30、 the minimum value of tbto achieve steady state semiconductor temperature before the next intermittent load is applied should be specified by the manufacturer. tbIpjjIatIbt0tpIEC 887/03Figure 4 Typical time chart for intermittent load duty with no-load intervals 6 7 CLC/TR 61800-6:2007 2.1.7 repetit
31、ive load duty type of duty for which loads are cyclically variable such that steady state temperature is not reached within the cycle period, and hence no base load can be given. Thermal equilibrium is reached when the average jdoes not vary from load cycle to load cycle. Figure 5 illustrates this t
32、ype of load duty. tsIvIpjjIatImIsIEC 888/03Figure 5 Example of current-time chart for repetitive load duty 2.1.8 non-repetitive load duty type of duty for which a peak load is applied at the end of a constant load period during which thermal equilibrium is reached. Figure 6 illustrates this kind of
33、load duty. IbIpjjIattpIEC 889/03Figure 6 Typical current-time chart for non-repetitive load duty 2.1.9 reversible converter line-side converter in which the flow of d.c. power is reversible CLC/TR 61800-6:2007 8 2.1.10 double converter current stiff reversible a.c./d.c. converter with direct current
34、 in both directions A double converter usually consists of two sections, one for each direction of current flow. NOTE The converter sections may be supplied from common windings, from separate windings on a common transformer, or from separate transformers. 2.2 Symbols Table 1 List of symbols t time
35、 tbbase load interval tsload cycle period (duration) t0no-load interval tppeak load duration Iaconverter current Ibbase load current value Ippeak load current value Ivminimum load current value Immean load current value for period tsIsr.m.s. load current value for period ts IaNrated continuous outpu
36、t current of the converter IdNrated direct current (of a line commutated converter) jtemperature of the converter under consideration. This is usually taken to be the junction temperature of the semiconductor device rNfactor which is used to evaluate the per-unit average semiconductor junction power
37、 loss as a function of the per-unit direct current, it is given by: odNoNVI Rr = where Rois the resistance value of the on-state characteristic of the semiconductor device Vois the threshold value of the on-state characteristic of the semiconductor device 3 Rated values 3.1 General The ratings defin
38、ed in this clause are to be applied to a complete drive module (CDM), including such components as conductors, switchgear, reactors and transformers as defined in IEC 61800-1 and IEC 61800-2. The basis of the rating of a reversible converter should be such that the converter operating either as a re
39、ctifier or as an inverter should be capable of meeting in either case all the specified load conditions. The thermal time constants of semiconductors (including their cooling devices) are much shorter than those for converter transformers and drive motors. For this reason, the high short-time peak c
40、urrents that occur in normal load duties of various types of adjustable speed drives are of greater significance for the semiconductor converter itself than for the converter transformers and motors. 8 9 CLC/TR 61800-6:2007 Short-time peak currents tend to cause faster and relatively higher temperat
41、ure rises in the semiconductors than in the transformers and motors. However, in some cases other parts, for example motor windings, may have equally short time constants. The load duty cycles defined in this technical report, should be used to determine the capability for short overloads, above the
42、 base current, or r.m.s. current in case of repetitive load duty, and are simplified to show just this. It is, however, also important that the r.m.s. value of the current of the actual duty cycle does not exceed 100% of the rating of the components with longer time constants, for example transforme
43、rs and motors. For a semiconductor device, the manufacturers maximum junction temperature is the critical temperature above which loss of control, failure or deterioration may occur. The junction temperature cannot be measured directly but it may be calculated for any load current-time chart. If loa
44、d current-time charts can be specified by the user, the manufacturer can calculate the junction temperature of the semiconductor to make certain that the maximum permissible junction temperature is not exceeded. A load current-time chart can always be used as a basis for rating. Two application clas
45、ses are considered in this technical report, one with converter loading conditions such that equilibrium temperature conditions are obtained between all superimposed loads and the other with cyclically variable loads such that thermal equilibrium is not reached within the cycle period, but which may
46、 occur on an average basis over a number of cycle periods. The first application class is defined by the following types of load duty: a) uniform load duty (Figure 1); b) intermittent peak load duty (Figure 2); c) intermittent load duty (Figure 3); d) intermittent load duty with no-load intervals (F
47、igure 4); A second application class is defined by the following types of load duty: e) repetitive load duty (Figure 5); f) non-repetitive load duty (Figure 6). To avoid ambiguity, it has been necessary to distinguish carefully between section ratings and equipment ratings. Consequently, all ratings
48、 except rated continuous output current IaNapply only to the semiconductor converter sections including components such as conductors, switchgear, reactors and transformers. Note that some components may be common to more than one section and such components should be rated accordingly. This situati
49、on has no effect on the basis of rating which is equipment (system) rather than component orientated. Rated current is applied to the converter equipment and is used as the per-unit base for all of the ratings applied to the converter sections. CLC/TR 61800-6:2007 10 3.2 ystem of establishing rated current-time values for semiconductor assemblies and equipments 3.2.1 General All converters, with or without a transformer, should be rated in terms of one of
