1、 AC three-phase motor 1. Shake the meter and a 500V meter is sufficient. If the insulation resistance of the wires on the three terminals to the motor casing is above 0.5M Ω, it indicates that there is no short circuit to ground. 2. Test with a multimeter to see if the resistance between A/B/C three-phase is equal, and it should be approximately the same. 3. Check the bearings and fans, sometimes if the bearings lock, the motor may burn out. 4. The no-load current of the motor is usually 10% to 50% of the rated current! 5. When the motor is running at rated current, it operates at full load and the output power is basically 100%. A small operating current indicates that the output power of the motor has decreased, indicating a light load operation. 2、 DC motor 1. Firstly, check for any open circuit and check if the resistance is normal. If it is a brushless DC motor, the rotor can be rotated and a multimeter can be used to check whether the output DC is normal. If it is a brushless DC motor with three-phase leads, the rotor can be rotated and the output AC voltage can be measured using a multimeter. 4. The output voltage is proportional to the speed
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