The terminal head is an important part in the wiring system of the motor product, and its function is to connect with the lead wire and realize the fixation with the terminal board. The material and size of the terminal will directly affect the quality and performance of the entire motor.
The terminal in the motor product, as the electrical connection part, plays the role of connecting with the power supply and carrying the conduction of the connection, so its material performance must meet the requirements.
In the installation process of the terminal head, it is first necessary to ensure that the connection link with the lead wire can be well deformed, especially when the cold pressing process is used, so that the terminal head and the lead wire conductor have good contact. In order to achieve the effect of close contact and firmness between the two, on the one hand, it is the material of the terminal, which is generally industrial red copper with good electrical conductivity and mechanical properties; diameter matching.
In the secondary wiring process, that is, during the connection process between the lead wire and the terminal board, due to the matching relationship between the terminal head and the terminal bolt, the terminal head is likely to be subjected to different degrees of bending force. The material is also very important, and it is necessary to ensure that there is no hidden danger of fracture after assembly. In the inspection cases of faulty motors, it was found that many motors with missing phases were caused by the quality problems of the terminals. The manufacturers of the terminals should use the raw materials that meet the requirements according to the regulations, and the motor manufacturers should pay close attention to the quality of the terminals. quality level.
According to the technical conditions of the connectors, the connectors should be stamped from industrial copper plates with a purity of not less than 99.9%, and the surface anti-corrosion treatment should be carried out according to the actual working conditions. Therefore, the surface color of the connectors we use is not different. Not the true color of copper.
According to the conductive function of the electrical connection of the terminal, its conductive cross-section is very important, and the size of its conductive cross-section is determined to be the area and thickness of the matching ring. During the inspection process of the motor due to the failure of the terminal, it was found that the thickness of the terminal was insufficient and the area of the ring was too small (that is, the hole was large but the diameter of the outer edge was small). Such problems were relatively rare in regular manufacturers. More often in some repair shops, the through hole of the terminal is enlarged at will, only to meet the fit with the terminal bolt, while ignoring the electrical conductivity of the terminal itself; another common problem is due to the Poor contact problems caused by too small head thickness.
From the case of faulty motors, it can be found that the non-compliance of the terminals will lead to the burning of the entire motor winding, and in the process of manufacturing and repairing the motor, if the importance of the terminals in the motor cannot be recognized, such problems will There will be endless streams.
From the analysis of the reliability of the motor connection, the terminal head of the standard motor and the terminal board are connected by a compression connection that is not easy to separate, that is, the joint of the terminal head is in the shape of a ring; in many cases, the customer requires the terminal head to be changed to Open plug-in type, for this requirement, the motor manufacturer should fully communicate with the customer to ensure the reliability of the connection link and the quality and safety of the motor and the driven equipment.
Post time: Feb-21-2023