Do you know that the three aspects that need to be paid attention to after the motor repair have been reviewed?After using this chat with you, the next topic electrical editor needs to pay attention to checkMotorWe hope to help you in the three aspects of maintenance.Frequency conversion speed motorA general term for motors driven by frequency converters.In fact, the motor designed for the frequency converter is a special frequency conversion motor. The motor can achieve different speeds and torques under the drive of the frequency converter to adapt to the changes in the demand of the load.Explosion-proof motorsA type of motor that can be used in flammable and explosive plants, and it does not generate sparks during operation.Explosion-proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries.In addition, it is also widely used in sectors such as textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, and medicine.The motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction.First of all: the motor housing includes two inspections. Check the motor housing. (1) Housing: The explosion-proof motor should be checked for the explosion-proof joint gap (the width and the length of the gap) when the explosion-proof motor is scheduled. The product conforms to the original drawing or explosion standard. If the shell is freshly prepared, the mechanical strength of the flameproof enclosure should be checked in accordance with the standard hydraulic test.If the original shell is processed locally, the pressure test is not necessary.The protection of other types of motor housings is the protective housing (IP). For example, after repairing the housing, check the protection level and whether the mechanical strength is reduced. (2) It should be the standard of the fan, fan housing, junction box, used to detect the requirements of the cable entrance.

Second: Check the electrical technology of the system (1) Winding: To repair the motor, we often need to replace the winding. In some different situations, we can't just analyze the drying time of the wet winding method.Winding maintenance service quality management can not only affect the performance evaluation index of a motor's electrical equipment, but also affect the explosion-proof safety performance of the motor.After the winding is replaced, a bridge or other research methods should be used to mainly measure the resistance of each phase, and how the phase resistance or line resistance should be balanced; use a shaker to measure the insulation resistance between the windings and the student to the ground, and the company controls the winding to ground, Phase-to-phase insulation withstand voltage test.For their original windings, the test voltage problem should be continuously reduced during the AC withstand voltage test (80% of the test voltage). (2) Motor no-load test and locked-rotor test under reduced voltage. (3) If required by the teacher, carry out structural type test or part of the type test project.For increased safety motors, temperature rise tests should be carried out in time.Third: Check the overall condition of the motor after maintenance (1) Whether the explosion-proof signs, nameplates, and warning plates are intact; (2) Whether the grounding terminals and marking products are intact; (3) Lubrication and surface coating of rotating parts; (4) ) Maintenance qualification marks, documents (test data reports, instructions) and some related accessories, etc.; (5) Inspection and test results are displayed and recorded and archived for future reference.