Plastic package motor

Abstract

The invention provides a plastic package motor. The plastic package motor comprises a front cover (1), The stator iron core (3), the rear end cover (2) and the anti-electric erosion structure electrically connect the front end cover (1), the stator iron core (3) and the rear end cover (2) together. The anti-electric erosion structure comprises an electrically conductive connector. The front end cover (1) is provided with a self-locking structure (4), and the electrically conductive connector is locked by the self-locking structure (4) and electrically connected to the front end cover (1). Theplastic encapsulated motor according to the invention can improve the reliability of the electric erosion prevention structure of the motor, so that the electric erosion prevention structure of the motor is firm and is not easy to fall off.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a plastic-encapsulated motor. Background technique [0002] At present, the anti-corrosion methods adopted by the motor industry mainly include: 1. Paste conductive tape on the plastic casing to connect the front and rear end covers of the motor, so that the potentials of the metal covers at both ends of the motor are equal. However, the conductive tape is not resistant to high temperature and high humidity environments. It is easy to fall off during transportation, installation and operation, and the reliability is low; 2. Make the steel ball of the bearing into a ceramic ball, so that the inner and outer rings of the bearing are insulated, but the cost is high; 3. Make the grease of the bearing conductive , so that the inner ring and the outer ring of the bearing are in a conduction state. With the extension of the service time of the bearing, the conductive grease w...

AI Technical Summary

Problems solved by technology

[0002] At present, the anti-corrosion methods adopted by the motor industry mainly include: 1. Paste conductive tape on the plastic casing to connect the front and rear end covers of the motor, so that the potentials of the metal covers at both ends of the motor are equal. However, the conductive tape is not resistant to high temperature and high humidity environments. It is easy to fall off during transportation, installation and operation, and the reliability is low; 2. Make the steel ball of the bearing into a ceramic ball, so that the inner and outer rings of the bearing are insulated, but the cost is high; 3. Make the grease of the bearing conductive , so that the inner ring and the outer ring of the bearing are in a conduction state. With the extension of the service time of the bearing, the conductive grease will gradually decrease, which seriously affects the lubricity and service life of the bearing; 4. Reduce the shaft voltage. Install a conductor on the motor shaft to make the conductor close to the bearing frame, or connect the conductor stator core to the metal cover to change the voltage difference between the inner and outer rings of the bearing. This method has poor operability, and the ground voltage of the inner and outer rings of the bearing is also very high high state

[0003] These methods can reduce the electrical corrosion of plastic-encapsulated motor bearings, but there are corresponding problems, such as the connection of the anti-electrical corrosion structure is not firm, it is easy to fall off, and the reliability is low

Images