This standard adopts IEC411-4 "Direct DC Converters for Vehicles" (1986 edition) as a reference
Theme and Scope of Application
This standard specifies the main technical parameters and test methods of DC choppers for traction.
This standard applies to DC choppers (hereinafter referred to as choppers) used for the main circuit on traction vehicles, as well as choppers used as auxiliary power sources on these vehicles. For vehicles with multiple power sources, this standard applies to electrical devices powered by direct current This standard does not apply to electric industrial vehicles powered by batteries and choppers for electric vehiclesReference Standards
GB 3859 Semiconductor Power Converters
GB 200.33 Electrotechnical Terminology Converters
GB 2423.4 Basic Environmental Testing Procedures for Electrical and Electronic Products Test Db: Alternating Damp Heat Test Method
ZB K63 003 Basic Technical Conditions for Traction Electrical Appliances
ZB K63 003 Basic Test Methods for Traction Electrical Appliances
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China