Motors and electrical equipment

A technology for a rotor shaft and a bearing bracket is applied in the field of motors and electrical equipment having the motors, which can solve the problems of difficult implementation, high cost, and reduced reliability, and achieves the effects of simple structure, low cost, and reduced shaft current.

Active Publication Date: 2021-11-30
GUANGDONG WELLING ELECTRIC MACHINE MFG
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a motor to solve the technical problems of high cost, difficult implementation and reduced reliability of the solutions for preventing electric corrosion of motor bearings in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Motors and electrical equipment
  • Motors and electrical equipment
  • Motors and electrical equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0051] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical ", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to mu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of motors, and relates to motors and electrical equipment with the motors. A shaft sleeve structure is provided on the motor, and the shaft sleeve part of the shaft sleeve structure is sleeved on the rotor shaft, and the shaft sleeve part is electrically connected to the bearing bracket, which is equivalent to adding an adjustment parallel to the bearing capacitance on the bearing outer ring and bearing inner ring. capacitance. On the one hand, the adjustment capacitance will increase the equivalent bearing capacitance between the bearing outer ring and the bearing inner ring, thereby reducing the shaft voltage between the bearing outer ring and the bearing inner ring; on the other hand, the shaft current can be shunted, The current between the bearing bracket and the rotor shaft is shunted from the branch of the above-mentioned regulating capacitor, which effectively reduces the shaft current flowing through the bearing outer ring and the bearing inner ring, so that the occurrence of electrical corrosion damage to the bearing is very effectively suppressed. The motor has the characteristics of simple structure, convenient assembly, high reliability and low cost.

Description

technical field [0001] The invention belongs to the technical field of electric motors, and in particular relates to an improved electric motor for preventing electric corrosion of bearings and electric equipment with the same. Background technique [0002] In recent years, due to the energy-saving trend of electrical equipment, the motors used are usually replaced by high-efficiency brushless DC motors for induction motors, such as air-conditioning units, which use high-efficiency brushless DC motors to drive fans. And these brushless DC motors are driven with an inverter, which employs a pulse width modulation method (hereinafter referred to as PWM) as a driving method. In this PWM driving method, the neutral point potential of the winding is not zero and a common-mode voltage occurs. In the case of high frequency, coupling capacitance is generated between the motor structure, and the common-mode voltage passes through the stator, rotor, permanent magnet, The coupling cap...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H02K11/00H02K5/16
CPCH02K5/161H02K11/0094H02K5/16H02K11/00H02K15/00
Inventor 李国雄陈丹曾路强黄成栋吕玉婵李虎陈国勇
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap