A charger is a device that charges other electrical appliances. This device adopts high-frequency power supply technology, intelligent dynamic adjustment charging technology, and utilizes power electronic semiconductor devices to convert AC power with fixed voltage and frequency into DC power. It is generally composed of flexible circuit boards, electronic components, and other components. According to the designed working frequency of the circuit, it can be divided into power frequency machines and high-frequency machines. It is widely used in various fields, especially in the field of daily life, and is widely used in mobile phones Common electrical appliances such as cameras. Chargers (chargers) can be divided into power frequency machines and high-frequency machines based on the designed operating frequency of the circuit. Power frequency machines are designed based on traditional analog circuit principles, and the internal power components of the machine (such as transformers, inductors, capacitors, etc.) are relatively large. Generally, there is relatively small noise when operating under high load. However, this model has strong resistance performance, reliability, and stability in harsh power grid environmental conditions compared to high-frequency machines
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