1、PUBLISHED DOCUMENT PD CLC/TR 61800-6:2007 Adjustable speed electrical power drive systems Part 6: Guide for determination of types of load duty and corresponding current ratings ICS 29.130 PD CLC/TR 61800-6:2007 This Published Document was published under the authority of the Standards Policy and St
2、rategy Committee on 30 March 2007 BSI 2007 ISBN 978 0 580 50326 9 National foreword This Published Document 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 It supersedes BS EN 61136-1:1998 which is withdrawn.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 Technica
3、l Committee PEL/22, Power electronics. A list of organizations represented on PEL/22 can be obtained on request 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 public
4、ation Amd. No. Date Comments TECHNICAL REPORT CLC/TR 61800-6 RAPPORT TECHNIQUE TECHNISCHER BERICHT February 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue d
5、e Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved 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 determ
6、ination of types of load duty and corresponding current ratings (IEC/TR 61800-6:2003) Entranements lectriques de 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 Leistungsantriebssys
7、teme mit einstellbarer Drehzahl Teil 6: Richtlinie zur Bestimmung von Lastspielarten und entsprechenden Strombemessungen (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, Cypr
8、us, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. CLC/TR 61800-6:2007 2 Forewor
9、d The text of the Technical Report IEC/TR 61800-6:2003, prepared by SC 22G, Adjustable speed electric drive systems 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. T
10、his Technical Report supersedes EN 61136-1:1995. Annex ZA has been added by CENELEC. _ Endorsement notice The text 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.
11、2 Normative references 4 2 Definitions4 3 Rated values8 3.1 General.8 3.2 System of establishing rated current-time 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 Deter
12、mination of type of load duty10 3.3 Rated currents for equipments and sections.10 3.3.1 General .10 3.3.2 Rated 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
13、 with no-load intervals .11 3.3.6 Rated currents for repetitive load duty11 3.3.7 Rated currents for non-repetitive 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 the
14、ir corresponding European publications .16 Figure 1 Typical current-time chart for uniform load duty 5 Figure 2 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
15、-load intervals.6 Figure 5 Example of current-time chart for repetitive load duty .7 Figure 6 Typical current-time 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
16、Table 2 Duty classes for non-repetitive industrial applications 14 CLC/TR 61800-6:2007 4 ADJUSTABLE SPEED ELECTRICAL 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 m
17、ethods for specifying ratings for adjustable speed electrical power drive systems (PDS) and in particular their 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 dri
18、ve systems are contained in IEC 61800-1, and for low voltage adjustable frequency a.c. power drive systems in IEC 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 und
19、ated references, the latest edition of the referenced document (including any amendments) applies. IEC 60146-1-1, Semiconductor convertors General requirements and line commutated convertors Part 1-1: Specifications of basic requirements IEC 61800-1, Adjustable speed electrical power drive systems P
20、art 1: General requirments Rating specifications for low voltage adjustables speed d.c. power drive systems IEC 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, definitio
21、ns and symbols 2.1 Terms and definitions For the purpose of this technical report the definitions given in IEC 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 conditio
22、ns of load and cooling NOTE Steady-state temperatures are in general different for different components. The times 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
23、respect to time 2.1.3 uniform load duty duty for which a converter equipment carries a current of fixed value for 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 dut
24、y (see Table 1 for symbols). I b j jI atIEC 884/03Figure 1 Typical current-time chart for uniform load duty 2.1.4 intermittent 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 succ
25、essive applications of the load. Figure 2 illustrates this type of load duty. The intermittent loads need not be equidistant, but the minimum value of t 0to achieve no-load semiconductor temperature before the next intermittent load should be specified by the manufacturer. t 0I p j jI att pIEC 885/0
26、3Figure 2 Typical current-time chart for intermittent peak load duty CLC/TR 61800-6:2007 6 2.1.5 intermittent load duty type 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 lo
27、ad. Figure 3 illustrates this type of load duty. The intermittent loads need not be equidistant, but the minimum value of t bto achieve steady state semiconductor temperature before the next intermittent load is applied should be specified by the manufacturer. t bI bI p j jI att pIEC 886/03Figure 3
28、Typical current-time chart for intermittent load duty 2.1.6 intermittent load duty with no-load intervals type of duty for which intermittent no-load intervals followed by high load intervals are superimposed onto a constant base load, such that thermal equilibrium is reached between successive appl
29、ications of the intermittent load. Figure 4 illustrates this type of load duty. The intermittent loads need not be equidistant, but the minimum value of t bto achieve steady state semiconductor temperature before the next intermittent load is applied should be specified by the manufacturer. t bI p j
30、 jI atI bt 0t pIEC 887/03Figure 4 Typical time chart for intermittent load duty with no-load intervals 6 7 CLC/TR 61800-6:2007 2.1.7 repetitive 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
31、load can be given. Thermal equilibrium is reached when the average jdoes not vary from load cycle to load cycle. Figure 5 illustrates this type of load duty. t sI vI p j jI atI mI sIEC 888/03Figure 5 Example of current-time chart for repetitive load duty 2.1.8 non-repetitive load duty type of duty f
32、or 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 load duty. I bI p j jI att pIEC 889/03Figure 6 Typical current-time chart for non-repetitive load duty 2.1.9 reversible converter line-side converter in
33、 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 in both directions A double converter usually consists of two sections, one for each direction of current flow. NOTE The converter sections may b
34、e 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 t bbase load interval t sload cycle period (duration) t 0no-load interval t ppeak load duration I aconverter current I bbase load current value I
35、 ppeak load current value I vminimum load current value I mmean load current value for period t sI sr.m.s. load current value for period t s I aNrated continuous output current of the converter I dNrated direct current (of a line commutated converter) jtemperature of the converter under consideratio
36、n. This is usually taken to be the junction temperature of the semiconductor device r Nfactor which is used to evaluate the per-unit average semiconductor junction power loss as a function of the per-unit direct current, it is given by: o dN o N V I Rr = where R ois the resistance value of the on-st
37、ate characteristic of the semiconductor device V ois the threshold value of the on-state characteristic of the semiconductor device 3 Rated values 3.1 General The ratings defined in this clause are to be applied to a complete drive module (CDM), including such components as conductors, switchgear, r
38、eactors 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 rectifier or as an inverter should be capable of meeting in either case all the specified load conditions. The thermal time co
39、nstants 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 currents that occur in normal load duties of various types of adjustable speed drives are of greater significance for the sem
40、iconductor 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 temperature rises in the semiconductors than in the transformers and motors. However, in some cases other parts, for example motor w
41、indings, 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 base current, or r.m.s. current in case of repetitive load duty, and are simplified to show just this. It is, however, also
42、 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 transformers and motors. For a semiconductor device, the manufacturers maximum junction temperature is the critical temperature above
43、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 load current-time charts can be specified by the user, the manufacturer can calculate the junction temperature of the semicondu
44、ctor 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 classes are considered in this technical report, one with converter loading conditions such that equilibrium temperature conditi
45、ons 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 occur on an average basis over a number of cycle periods. The first application class is defined by the following types of
46、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 (Figure 4); A second application class is defined by the following types of load duty: e) repetitive load duty (Figure 5); f)
47、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 except rated continuous output current I aNapply only to the semiconductor converter sections including components such as
48、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 situation has no effect on the basis of rating which is equipment (system) rather than component orientated. Rated current is appl
49、ied 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 the following six load duties: a
