1、BRITISH STANDARD BS EN 61922:2002 High-frequency induction heating installations Test methods for the determination of power output of the generator The European Standard EN 61922:2002 has the status of a British Standard ICS 25.180.10 BS EN 61922:2002 This British Standard was published under the a
2、uthority of the Standards Policy and Strategy Committee on 19 May 2003 BSI 19 May 2003 ISBN 0 580 41881 2 National foreword This British Standard is the official English language version of EN 61922:2002. It is identical with IEC 61922:2002. The UK participation in its preparation was entrusted to T
3、echnical Committee PEL/27, Electroheating, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document ma
4、y be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users
5、are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, a
6、nd keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright date dis
7、played in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 61922 NORME EUROPENNE EUROPISCHE NORM October 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electr
8、otechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61922:2002 E ICS 25.180.10 English version High-frequency
9、induction heating installations - Test methods for the determination of power output of the generator (IEC 61922:2002) Installations de chauffage par induction haute frquence - Mthodes dessai pour la dtermination de la puissance de sortie du gnrateur (CEI 61922:2002) Hochfrequenz- Induktionserwrmung
10、sanlagen - Prfverfahren fr die Bestimmung der Ausgangsleistung des Generators (IEC 61922:2002) This European Standard was approved by CENELEC on 2002-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
11、the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French,
12、German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czec
13、h Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.Foreword The text of document 27/314/FDIS, future edition 1 of IEC 61922, prepared by IEC TC 27, Industri
14、al electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61922 on 2002-09-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (d
15、op) 2003-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2005-09-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and a
16、nnex A is informative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61922:2002 was approved by CENELEC as a European Standard without any modification. _ Page2 EN61922:2002CONTENTS 1 Scope and object4 2 Normative references4 3 Definitions5 4 Tes
17、ts loads.5 4.1 Conical calorimeter load 6 4.2 Lamp load temperature method .6 4.3 Matched resistive loads .6 5 Description of tests.6 5.1 Conical calorimeter load 6 5.2 Lamp load temperature method .8 5.3 Matched resistive loads .9 Annex A (informative) Calculation of the test inductor inductance .1
18、6 Annex ZA (normative) Normative references to international publications with their corresponding European publications18 Figure 1 Definition of the output power .10 Figure 2 Example of the calorimeter .11 Figure 3 Example of the water resistor for the power measurement.12 Figure 4 Example of the o
19、ne-turn test inductor13 Figure 5 Example of the adjustable inductance .14 Figure 6 Example of the circuit for the measurement by the lamp load temperature method 15 Figure A.1 Main dimensions of test inductors for the conical calorimeter .17 Page3 EN61922:2002HIGH-FREQUENCY INDUCTION HEATING INSTALL
20、ATIONS TEST METHODS FOR THE DETERMINATION OF POWER OUTPUT OF THE GENERATOR 1 Scope and object This International Standard is applicable to industrial radio- or high-frequency induction heating installations used for the purpose of thermal applications (e.g. for surface hardening, welding, soldering,
21、 melting, forging, zone refining of semiconductors, etc.). This standard relates to high-frequency induction heating installations in the frequency range up to 300 MHz for power levels of 500 W and above, comprising high-frequency generators and inductors together with necessary mechanical devices f
22、or charge handling (e.g. hardening machines). The main purpose of this standard is to provide the test methods for the determination of output power of industrial high-frequency induction heating power sources. Loads as described in this standard may be used in compliance assessment of electromagnet
23、ic compatibility according to CISPR 11. This standard relates to generator capacity of operation under continuous rated conditions as specified by the manufacturer. The methods of measurement of power output of generators operating in pulse mode with short duty cycles (e.g. the adiabatic calorimeter
24、) are under consideration. Electronic systems of power measurement are commercially available, but care must be taken in their application because accuracy can not be guaranteed, particularly at higher frequencies. These instruments require high current transformers and voltage transformers for the
25、output power measurements and they also are subject to errors at higher frequencies. These methods require expert knowledge for successful application and therefore are not detailed in this standard. 2 Normative references The following referenced documents are indispensable for the application of t
26、his document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-841, International Electrotechnical Vocabulary (IEV) Chapter 841: Industrial electroheating IEC 60519-1, Safety in e
27、lectroheat installations Part 1: General requirements Page4 EN61922:2002IEC 60519-3:1988, Safety in electroheat installations Part 3: Particular requirements for induction and conduction heating and induction melting installations IEC 61308:1994, High-frequency dielectric heating installations Test
28、methods for the determination of power output CISPR 11, Industrial, scientific and medical (ISM) radio-frequency equipment Electro- magnetic disturbance characteristics Limits and methods of measurement 3 Definitions For the purposes of this International Standard, the definitions given in IEC 60050
29、-841, IEC 60519-1 and IEC 60519-3 as well as the following, apply. 3.1 high-frequency output power power measured at the power output terminals of the generator, feeding to the test load as defined in this standard NOTE This definition is explained in figure 1. The left side of the drawing contains
30、the generator and is limited by its two output terminals. The load is connected to these terminals. All power that appears outside of the generator case is defined as the output power of the generator. It comprises the power dissipated in the inductor, power leads, calorimeter, etc. 3.2 calorimeter
31、device for the measurement of high-frequency power, which consists of a part cooled by water, under controlled flow and measured temperature difference between water inlet and outlet temperatures NOTE This part is made of steel or other conductive material into which high-frequency currents are indu
32、ced. 3.3 surface power density quotient of the power and the active surface of the calorimeter 3.4 loop inductor inductor in the shape of a loop brought close to the load without forming a full circle around it 3.5 test load equipment consisting of the connection leads, the inductor and the calorime
33、ter. If a resistor without reactive elements is used as a load, an auxiliary resonant circuit is used for the elimination of the harmonic power. If this auxiliary circuit is not part of the generator, the losses in this circuit are measured with the losses in the other parts of the test load 4 Tests
34、 loads There are three different types of output power test loads for use in high-frequency induction heating installations. Only the main ones are outlined. Detailed constructions shall conform to known engineering techniques. Page5 EN61922:20024.1 Conical calorimeter load The conical calorimeter l
35、oad is generally used as part of the test load. This calorimeter enables easy load matching and the changing of inductors without disconnecting parts of the installation (e.g. water connections to the calorimeter). 4.2 Lamp load temperature method The lamp load temperature method is used for applica
36、tions up to about 20 kW. The matching of the load is possible by selection of the lamps itself as well as by combination of several lamps in parallel and/or in series. 4.3 Matched resistive loads A matched resistive load can be used for applications where the resistive load can be connected to the h
37、igh-frequency output terminals. 5 Description of tests Electromagnetic fields in places occupied by attending personnel shall conform with national and/or international safety regulations. High-frequency fields should not affect measuring devices. In particular, mercury thermometers should not be pl
38、aced in magnetic fields of great strength. For all listed calorimetric measurement methods, care shall be taken that the outlet temperature will be measured as close as possible to the load. Besides the listed calorimetric methods direct electric measurement methods can also be used. In this case, t
39、he current and voltage transformers as well as the measurement instrument itself must be suitable for the power factor, the working frequency and its harmonics. The sum of all errors shall not exceed 5 %. NOTE In special cases when it is necessary to measure powers in the range from 100 W to 500 W,
40、the errors greater than 5 % should be accepted. 5.1 Conical calorimeter load A typical example is shown in figure 2. External walls of the calorimeter are made of carbon steel. The use of high alloy steel is not recommended, because of lower magnetic permeability than most loads used in practical ap
41、plications. The thickness of walls shall provide adequate mechanical strength (also in the case of overheating). The inner cone can also be made of steel. The cross section of those parts, where water flows, should be, if possible uniform and such as to provide suitable water velocity for best heat
42、exchange. NOTE 1 For the simulation of the load above the Curie point, the calorimeter with external walls made of brass or austenitic stainless steel can be used. The external dimensions of the cone shall be chosen in such manner that the obtained surface power density in those parts of the calorim
43、eter that are covered by the inductor, does not exceed 0,5 kW/cm 2 . Typical dimensions are given in figure 2. NOTE 2 Higher surface power density may cause excessive heating of the calorimeter walls and, in consequence, greater losses for radiation and greater errors of power determination. Page6 E
44、N61922:2002Still higher surface power density or non-coaxial placing of the calorimeter in the inductor may cause local overheating and perforation of the walls. If, higher surface power density is necessary for the character of the particular test, it is possible to use a simple cylindrical calorim
45、eter with the thickness of wall diminished, but not thinner than 0,6 mm and with an intensive cooling. Such a device can easily be deteriorated, therefore the outer shell should be easily interchangeable. The calorimeter shall be water cooled. A recommended water flow would be about 1 l/min per kW,
46、but not less than 0,5 l/min per kW. The water flow rate shall be stable. To avoid the formation of steam, the water flow should be monitored, for instance, by means of flow interlocking switches. NOTE 3 Small local overheating of the walls to a temperature less than 500 C (hardly visible dark red co
47、lour) is acceptable and does not significantly affect the results. The water inlet temperature shall not exceed 35 C. The water outlet temperature shall not exceed 60 C. The difference between the outlet temperature and the inlet temperature shall be at least 10 C in order to obtain results of an ac
48、ceptable accuracy. Any tap water can be used. The measurement shall be carried out, when the load is in thermal equilibrium. It is necessary to use high-precision thermometers and flow meters to ensure that the accuracy of power output measurement is within 5 %. The calorimeter is placed coaxially i
49、n the test inductor connected to the output terminals of the equipment under test. The load can be adjusted by moving the calorimeter up and down in the inductor. For this purpose, the charge handling machine (with rotational movement switched off) may be used. The inductance of the test inductor shall be of the order of the inductance of inductors provided in practice. The test inductor may have one or more turns and should be ma
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