UL 2738-2018 UL Standard for Safety Induction Power Transmitters and Receivers for use with Low Energy Products (Second Edition).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2738 Induction Power Transmitters and Receivers for use with Low Energy Products STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PE

2、RMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Induction Power Transmitters and Receivers for use with Low Energy Products, UL 2738 Second Edition, Dated January 12, 2018 Summary of Topics This new

3、 edition of ANSI/UL 2738 includes the following change in requirements: Correlation of construction requirements with UL 962A The revised requirements are substantially in accordance with Proposal(s) on this subject dated November 10, 2017. All rights reserved. No part of this publication may be rep

4、roduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the im

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6、rd, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree t

7、o defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. JANUARY 12,

8、2018 UL 2738 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 12, 2018 UL 2738 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL January 12, 2018 1 UL

9、 2738 Standard for Induction Power Transmitters and Receivers for use with Low Energy Products First Edition April, 2011 Second Edition January 12, 2018 This ANSI/UL Standard for Safety consists of the Second Edition. The most recent designation of ANSI/UL 2738 as an American National Standard (ANSI

10、) occurred on January 10, 2018. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Page. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Col

11、laborative Standards Development System (CSDS) at https:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole

12、 and exclusive property of UL. COPYRIGHT 2018 UNDERWRITERS LABORATORIES INC. ANSI/UL 2738-2018UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 12, 2018 UL 2738 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER R

13、EPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Components5 3 Units of Measurement .5 4 Undated References 5 5 Glossary .5 CONSTRUCTION 6 General 6 PERFORMANCE 7 General 7 8 Induction Power Transmitter Maximum Power Transfer Test Normal Operation .7 9 Induct

14、ion Power Transmitter Maximum Power Transfer Test Component Fault Test .7 10 Induction Receiver Limited Power and Current Test 8 JANUARY 12, 2018 UL 2738 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These require

15、ments apply to: a) Induction power transmitters intended to be supplied by an internal or external power source, which is powered by a branch circuit of 600 volts or less; and b) Induction receivers intended for use with induction power transmitters. 1.2 With regard to 1.1(b), the output from an ind

16、uction receiver assembly does not exceed: a) 60 V dc or 42.4 V ac peak; and b) 100 VA capacity. Exception: Greater voltage or VA limits are permitted when the combination receiver and supplied equipment comply with the applicable end-product requirements. 1.3 An induction power transmitter employs a

17、 magnetic induction coil(s) transmitting energy to a receiving coil in a device placed near the power platform. 1.4 An induction receiver is a device intended for powering a low energy product. The receiver may be an incomplete device intended for installation in or on the low energy product, or the

18、 receiver may be a complete device intended for connection to a low energy product. 1.5 An “induction battery charger” is an example of induction power transmitting and receiving equipment covered by these requirements. Examples of low energy products powered by the induction transmitter and receive

19、r include cell phones, personal data assistants, portable media players, global positioning devices, and similar small battery powered portable devices. 1.6 These requirements do not apply to a product powered by an induction receiver. Requirements for the powered product are specied in the appropri

20、ate end-product Standard which may be supplemented by these requirements. 1.7 These requirements do not apply to a product with an integral induction receiver. Requirements for such products are specied in the appropriate end-product Standard which may be supplemented by these requirements. 1.8 Thes

21、e requirements do not address physiological effects, or electromagnetic compatibility with other equipment and power systems. JANUARY 12, 2018 UL 2738 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Components 2.1 Except as indicated in 2

22、.2, a component of a product covered by this Standard shall comply with the requirements for that component. 2.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by th

23、is Standard; or b) Is superseded by a requirement in this Standard. 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are

24、 intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate inf

25、ormation. 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this Standard shall be interpreted as referring to the latest edition of that code or standard. 5 Glossary 5.1 For the purpose of this Standard, the following denitions apply. 5.2 INDUCTIO

26、N POWER TRANSMITTER The equipment consisting of the supply connections, control circuitry, induction transmitting coils, power platform, and overall enclosure. 5.3 INDUCTION RECEIVER The equipment consisting of control circuitry, induction receiving coil, electrical output connections and enclosure.

27、 An induction receiver may be a complete assembly with output plug for connection to a low energy product, or it may be an assembly for installation in or on a low energy product. For a product with an integral induction receiver, see 1.7. 5.4 LOW ENERGY PRODUCT For the purposes of these requirement

28、s, a product intended to receive no more than 100 VA from the induction receiver under normal operation. 5.5 POWER PLATFORM The part or surface of the induction power transmitter housing the inductive transmitting coil. JANUARY 12, 2018 UL 2738 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP

29、RODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.6 RF CONVERSION CIRCUIT For a transmitter coil, the circuit interface between the input supply (e.g. 60 Hz, DC, etc.) and the RF coil. For a receiver coil, the circuit interface between the RF coil and the induction receiver output. CONSTRUCTION

30、 6 General 6.1 In addition to these requirements, an induction power transmitter shall comply with the construction, performance, production, marking, and instruction requirements of one of the following: a) The Standard for Class 2 Power Units, UL 1310; b) The Standard for Power Units other than Cl

31、ass 2, UL 1012; c) The Standard for Information Technology Equipment Safety - Part 1: General Requirements, UL 60950-1; d) The Standard for Audio, Video, and Similar Electronic Apparatus-Safety Requirements, UL 60065; e) The Standard for Household and Commercial Furnishings, UL 962; f) The Standard

32、for Furniture Power Distribution Units, UL 962A; g) The Standard for Office Furnishings, UL 1286; h) The Standard for Household and Similar Electrical Appliances, Part 1: General Requirements, UL 60335-1; or i) The Standard for Safety for Audio/Video, Information and Communication Technology Equipme

33、nt Part 1: Safety Requirements, UL 62368-1. 6.2 In addition to these requirements, an induction receiver shall comply with the construction, performance, production, marking, and instruction requirements of one of the following: a) The Standard for Class 2 Power Units, UL 1310; b) The Standard for P

34、ower Units other than Class 2, UL 1012; c) The Standard for Information Technology Equipment Safety - Part 1: General Requirements, UL 60950-1; d) The Standard for Audio, Video, and Similar Electronic Apparatus-Safety Requirements, UL 60065; e) The Standard for Household and Similar Electrical Appli

35、ances, Part 1: General Requirements, UL 60335-1; or f) The Standard for Safety for Audio/Video, Information and Communication Technology Equipment Part 1: Safety Requirements, UL 62368-1. JANUARY 12, 2018 UL 2738 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOU

36、T PERMISSION FROM UL PERFORMANCE 7 General 7.1 When performing tests at rated load conditions in accordance with a Standard specied in 6.1, the power platform is to be loaded to the maximum power transfer that may occur under normal conditions. A power platform capable of supplying multiple inductio

37、n receivers is to be, under normal conditions, loaded to result in the maximum input power to the induction power transmitter. 8 Induction Power Transmitter Maximum Power Transfer Test Normal Operation 8.1 The maximum power input to any single transmitting coil RF conversion circuit shall not exceed

38、 240 VA when the power platform is supplied by the voltage used during the normal temperature test in accordance with a Standard specied in 6.1. Exception: Greater VA limit is permitted when the combination transmitter, receiver, and supplied equipment comply with the applicable end-product requirem

39、ents. 8.2 In order to determine compliance with 8.1, an adjustable simulated load is to be used which incorporates an induction receiver appropriate to the power platform. The simulated load shall be capable of providing a load demand to the transmitting coil greater than the maximum input specied i

40、n 8.1. The input power to the transmitting coil is to be monitored while the simulated load is adjusted to result in the maximum power to the transmitting coil. 9 Induction Power Transmitter Maximum Power Transfer Test Component Fault Test 9.1 The maximum power input to any single transmitting coil

41、RF conversion circuit, with a single component fault of short or open circuit within the induction power transmitter, shall not exceed 240 VA when the power platform is supplied by the voltage used during the normal temperature test in accordance with a Standard specied in 6.1. Exception: Greater VA

42、 limit is permitted when the combination transmitter, receiver, and supplied equipment comply with the applicable end-product requirements. 9.2 In order to determine compliance with 9.1, an adjustable simulated load is to be used which incorporates an induction receiver appropriate to the power plat

43、form. The simulated load shall be capable of providing a load demand to the transmitting coil greater than the maximum input specied in 9.1. The selected component fault within the induction power transmitter is to be introduced and the input power to the transmitting coil is to be monitored while t

44、he simulated load is adjusted to result in the maximum power to the transmitting coil. JANUARY 12, 2018 UL 2738 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 10 Induction Receiver Limited Power and Current Test 10.1 When supplied from an

45、induction power transmitter coil assembly appropriate to the induction receiver (see also 10.2), the output voltage, current, and power under normal and single component fault conditions within the receiver circuitry shall comply with: a) The Standard for Class 2 Power Units, UL 1310; b) The Standar

46、d for Information Technology Equipment Safety - Part 1: General Requirements, UL 60950-1, limited power source requirements; or c) The Standard for Safety for Audio/Video, Information and Communication Technology Equipment Part 1: Safety Requirements, UL 62368-1. Exception: Greater limits are permit

47、ted when the combination receiver and supplied equipment comply with the applicable end-product requirements. 10.2 For the purposes of the test requirement in 10.1, the induction power transmitter shall have sufficient capacity such that any energy limiting is integral to the induction receiver the transmitter shall not limit the receiver output. This requirement is applicable only in the applicable test conguration. JANUARY 12, 2018 UL 2738 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL