1、 Reference number ISO 7176-21:2009(E) ISO 2009INTERNATIONAL STANDARD ISO 7176-21 Second edition 2009-04-01 Wheelchairs Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers Fauteuils roulants Partie 21: Exigenc
2、es et mthodes dessai pour la compatibilit des fauteuils roulants lectriques et scooters motoriss ISO 7176-21:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typeface
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7、.iso.org Published in Switzerland ii ISO 2009 All rights reservedISO 7176-21:2009(E) ISO 2009 All rights reserved iii Contents Page Foreword iv Introduction . vi 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Classification of electrically powered wheelchairs. 4 5 Requirements 4
8、 5.1 General. 4 5.2 Wheelchair drives . 4 5.3 Wheelchairs with an on-board battery charger . 6 5.4 Off-board and carry-on battery chargers . 8 6 Test apparatus 9 7 Preparation 10 7.1 Wheelchairs driving. 10 7.2 Wheelchairs non-driving. 11 7.3 Wheelchairs with on-board battery chargers 11 7.4 Off-boa
9、rd and carry-on battery chargers .11 8 Sequence of tests . 11 9 Test methods for emissions 11 9.1 Mains terminal disturbances . 11 9.2 Radiated emissions 12 9.3 Harmonic current emissions . 12 9.4 Voltage fluctuations and flicker 12 10 Test methods for immunity 13 10.1 Electrostatic discharge immuni
10、ty . 13 10.2 Radiated r.f. field immunity 14 10.3 Fast transient/burst immunity . 17 10.4 Surge immunity. 17 10.5 Conducted disturbance immunity. 18 10.6 Power frequency magnetic field immunity. 18 10.7 Voltage dips and short interruptions immunity. 18 11 Wheel speed change calculations 19 12 Test r
11、eport . 20 13 Disclosure 20 14 User manual 20 ISO 7176-21:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally car
12、ried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
13、 ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare Interna
14、tional Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the
15、elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7176-21 was prepared by Technical Committee ISO/TC 173, Assistive products for persons with disability, Subcommittee SC 1, Wheelchairs. This second edit
16、ion cancels and replaces the first edition (ISO 7176-21:2003), which has been technically revised. ISO 7176 consists of the following parts, under the general title Wheelchairs: Part 1: Determination of static stability Part 2: Determination of dynamic stability of electric wheelchairs Part 3: Deter
17、mination of effectiveness of brakes Part 4: Energy consumption of electric wheelchairs and scooters for determination of theoretical distance range Part 5: Determination of dimensions, mass and manoeuvring space Part 6: Determination of maximum speed, acceleration and deceleration of electric wheelc
18、hairs Part 7: Measurement of seating and wheel dimensions Part 8: Requirements and test methods for static, impact and fatigue strengths Part 9: Climatic tests for electric wheelchairs Part 10: Determination of obstacle-climbing ability of electrically powered wheelchairs Part 11: Test dummies Part
19、13: Determination of coefficient of friction of test surfaces Part 14: Power and control systems for electrically powered wheelchairs and scooters Requirements and test methods ISO 7176-21:2009(E) ISO 2009 All rights reserved v Part 15: Requirements for information disclosure, documentation and labe
20、lling Part 16: Resistance to ignition of upholstered parts Requirements and test methods Part 19: Wheeled mobility devices for use as seats in motor vehicles Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery charger
21、s Part 22: Set-up procedures Part 23: Requirements and test methods for attendant-operated stair-climbing devices Part 24: Requirements and test methods for user-operated stair-climbing devices Part 26: Vocabulary A Technical Report (ISO/TR 13570-1, Wheelchairs Part 1: Guidelines for the application
22、 of the ISO 7176 series on wheelchairs) is also available, giving information on how to use the ISO 7176 standards when selecting a wheelchair and helping readers to understand the purpose for, and content of, the International Standards on wheelchairs. ISO 7176-21:2009(E) vi ISO 2009 All rights res
23、ervedIntroduction Electrically powered wheelchairs and their battery chargers are meant to operate without introducing significant electromagnetic disturbances into the environment and without significant degradation of operational performance in the presence of electromagnetic disturbances expected
24、 in normal use. Wheelchairs are often used near roads and therefore should be immune to radio frequency fields from both static and mobile communications equipment, as well as from other sources of electromagnetic disturbance. Injury could occur in the event of unintentional movement or change in di
25、rection of movement of a wheelchair. This part of ISO 7176 specifies requirements and test methods for wheelchairs and their battery chargers to minimize the risks associated with their exposure to reasonably foreseeable electromagnetic interference and electrostatic discharge and with their product
26、ion of electromagnetic fields that could impair the operation of other devices or equipment in their usual environment. The upper frequency limit and test level for radiated r.f. immunity requirements are selected according to the environment in which the wheelchair is used and the related risk. Hen
27、ce the requirements for a wheelchair while it is driving are consistent with its use as a medical device, but the requirements for charging are consistent with use of the wheelchair and charger as domestic electrical equipment. INTERNATIONAL STANDARD ISO 7176-21:2009(E) ISO 2009 All rights reserved
28、1 Wheelchairs Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers WARNING This part of ISO 7176 calls for the use of procedures that can be hazardous if adequate precautions are not taken. It refers only to t
29、echnical suitability and does not absolve the manufacturer or test house from any legal obligations relating to health and safety. 1 Scope This part of ISO 7176 specifies requirements and test methods for electromagnetic emissions and for electromagnetic immunity of electrically powered wheelchairs
30、and scooters with a maximum speed of not more than 15 km/h intended for indoor and/or outdoor use by people with disabilities. It is also applicable to manual wheelchairs with an add-on power kit. It is not applicable to vehicles designed to carry more than one person. This part of ISO 7176 also spe
31、cifies requirements and test methods for the electromagnetic compatibility of battery chargers intended for use with electrically powered wheelchairs and scooters. A reference configuration is specified for adjustable wheelchairs and scooters in order to enable test results to be used for comparison
32、 of performance. NOTE The term “wheelchair” is used in this part of ISO 7176 to cover electrically powered wheelchairs, scooters and manual wheelchairs with an add-on power kit. 2 Normative references The following referenced documents are indispensable for the application of this document. For date
33、d references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7176-5, Wheelchairs Part 5: Determination of dimensions, mass and manoeuvring space ISO 7176-9, Wheelchairs Part 9: Climatic tests for electric
34、wheelchairs ISO 7176-15, Wheelchairs Part 15: Requirements for information disclosure, documentation and labelling ISO 7176-22, Wheelchairs Part 22: Set-up procedures IEC 61000-3-2, Electromagnetic compatibility (EMC) Part 3-2: Limits Limits for harmonic current emissions (equipment input current u
35、16 A per phase) IEC 61000-3-3, Electromagnetic compatibility (EMC) Part 3-3: Limits Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current u 16 A per phase and not subject to conditional connection IEC 61000-4-2, Electro
36、magnetic compatibility (EMC) Part 4-2: Testing and measurement techniques Electrostatic discharge immunity test ISO 7176-21:2009(E) 2 ISO 2009 All rights reservedIEC 61000-4-3, Electromagnetic compatibility (EMC) Part 4-3: Testing and measurement techniques Radiated, radio-frequency, electromagnetic
37、 field immunity test IEC 61000-4-4, Electromagnetic compatibility (EMC) Part 4-4: Testing and measurement techniques Electrical fast transient/burst immunity test IEC 61000-4-5, Electromagnetic compatibility (EMC) Part 4-5: Testing and measurement techniques Surge immunity test IEC 61000-4-6, Electr
38、omagnetic compatibility (EMC) Part 4-6: Testing and measurement techniques Immunity to conducted disturbances, induced by radio-frequency fields IEC 61000-4-8, Electromagnetic compatibility (EMC) Part 4-8: Testing and measurement techniques Power frequency magnetic field immunity test IEC 61000-4-11
39、, Electromagnetic compatibility (EMC) Part 4-11: Testing and measurement techniques Voltage dips, short interruptions and voltage variations immunity tests CISPR 11, Industrial, scientific and medical (ISM) radio-frequency equipment Electromagnetic disturbance characteristics Limits and methods of m
40、easurement 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 drive wheel wheel, or one of a set of wheels, that propels the wheelchair 3.2 front vertical plane plane normal to the forward direction of travel and tangential to the front edge of
41、the furthest forward wheel See Figure 1. 3.3 rear vertical plane plane normal to the forward direction of travel and tangential to the back edge of the rearmost wheel See Figure 1. 3.4 side vertical plane plane parallel to the forward direction of travel and tangential to the outer edge of the outer
42、most wheel on the side of the wheelchair See Figure 1. 3.5 off-board battery charger free-standing, self-contained battery charger separate from the wheelchair 3.6 carry-on battery charger off-board battery charger intended for transportation on the wheelchair 3.7 on-board battery charger battery ch
43、arger that is built into the wheelchair and cannot be removed without the use of tools ISO 7176-21:2009(E) ISO 2009 All rights reserved 3Key 1 rear vertical plane 2 front vertical plane 3 side vertical plane Figure 1 Reference planes ISO 7176-21:2009(E) 4 ISO 2009 All rights reserved4 Classification
44、 of electrically powered wheelchairs Electrically powered wheelchairs are classified as follows: category A: wheelchairs with electronic differential steering and electronic brake control; category B: wheelchairs with electronic speed control, electronic servo steering and electronic brake control;
45、category C: wheelchairs with electronic speed control, manual steering and electronic brake control; category D: wheelchairs with electronic differential steering and manual brake control; category E: wheelchairs with electronic speed control, electronic servo steering and manual brake control; cate
46、gory F: wheelchairs with electronic speed control, manual steering and manual brake control; category G: wheelchairs with a simple on-off motor, manual steering and manual brake control. NOTE A wheelchair can fall into more than one category. 5 Requirements 5.1 General All wheelchairs shall meet the
47、 requirements of 5.2. Wheelchairs with an on-board battery charger shall also meet the requirements of 5.3. Off-board and carry-on battery chargers shall meet the requirements of 5.4. NOTE An observation period of 2 s is specified in many of the requirements of 5.2, 5.3 and 5.4. This is not intended
48、 to imply that it is acceptable for the wheelchair or charger under test to fail after the observation period has elapsed. An indefinite observation period is impractical and it is assumed that if the wheelchair or charger does fail during a test, it will fail within 2 s of a test event. 5.2 Wheelch
49、air drives 5.2.1 Radiated emissions When tested in accordance with 9.2.1, the wheelchair shall meet the radiated emissions limits specified in CISPR 11 for group 1, class B equipment. 5.2.2 Electrostatic discharge immunity Prior to and at the conclusion of testing in accordance with 10.1.1.1 and 10.1.1.2, the wheelchair shall meet the functional requirement specified in ISO 7176-9 (see also Clause 8). When the wheelchair i
