Plastic motor
A technology of plastic-encapsulated motors and conductive strips, applied in the direction of connection with grounding devices, can solve problems such as electrical corrosion of plastic-encapsulated motor bearings, and achieve the effects of changing electrostatic capacity, reducing electrical corrosion, and reducing potential difference
Active Publication Date: 2020-09-01
GUANGDONG WELLING ELECTRIC MACHINE MFG
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Problems solved by technology
[0004] The main purpose of the present invention is to propose a plastic-sealed motor, aiming at solving the problem of electrical corrosion of the plastic-sealed motor bearing
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0024] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.
[0025] In addition, if there are descriptions involving "first", "second" and ...
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The invention discloses a plastic packaging motor comprising a stator assembly, a first end cap, a second end cap, a plastic packaging housing, a first conductive member and a second conductive member. The first end cap is arranged at one axial end of the stator assembly and is provided with a first bearing; the second end cap is arranged at the other axial end of the stator assembly and is provided with a second bearing; and the plastic packaging housing is packaged at the outer side of the stator assembly. The first end cap is connected with the first bearing are in conductive connection; the second end cap and the second bearing are in conductive connection; the first conductive member is in conductive connection with the first end cap and the second end cap; the second conductive member is in conductive connection with the first end cap and a stator iron core. According to the plastic packaging motor, with the first conductive member and the second conductive member, the stator iron core is in conductive connection with the first end cap and the second end cap to reduce a potential difference between an inner ring and an outer ring of the bearing, so that the electrocorrosion phenomenon of the first bearing and the second bearing is reduced.
Description
technical field [0001] The invention relates to the field of motors, in particular to a plastic-encapsulated motor. Background technique [0002] DC motors are generally driven by pulse width modulation (PWM) inverters. Since the high-frequency changing current will cause a voltage difference between the inner and outer rings of the bearing, when the voltage difference reaches the voltage that can break down the oil film of the bearing, a small current will pass through the bearing raceway and the bearing ball , resulting in electrical corrosion of the bearing, making the bearing emit abnormal noise, and reducing the service life of the bearing. [0003] In order to solve the above technical problems, the existing technology usually connects the outer ring of the bearing with the stator core. There are two common ways to connect the outer ring of the bearing with the stator core. Leave a hole to insert the conductive pin, and then connect the conductive pin to the end cove...
Claims
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IPC IPC(8): H02K11/40
CPCH02K11/40
Inventor 甘峰李虎迟闯
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG