Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Condition monitoring and fault early warning method of ship generator stator core

A technology of generator stator and stator core, which is applied in the direction of motor generator testing, etc., can solve the problems of unscientific setting of thresholds, no consideration of changes in structural parameters, and differences.

Active Publication Date: 2016-03-30
NAVAL UNIV OF ENG PLA
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned idea has three deficiencies. One is: the threshold value set by the temperature rise is set arbitrarily, and the threshold value of different generators and different motor parts is not the same, and the setting of the threshold value is not scientific.
The second is: the temperature rise of the stator core is related to many structural parameters of the generator. The influence of fluctuations in different parameters on the temperature rise of the core can offset each other. Simply comparing the temperature measured by the sensor with the calculated standard value can only preliminarily determine the power generation. machine state
Does not consider the change of structural parameters of the generator in this state

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
  • Condition monitoring and fault early warning method of ship generator stator core
  • Condition monitoring and fault early warning method of ship generator stator core
  • Condition monitoring and fault early warning method of ship generator stator core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] figure 1 Shown is an embodiment of a schematic diagram of a radially ventilated medium-sized AC motor stator, and its thermal circuit diagram is shown in figure 2 . The motor is an electromechanical energy conversion mechanism. In the process of electromechanical energy conversion, losses are inevitable. Most of these losses eventually turn into heat, which increases the temperature of various parts of the motor. The temperature rise of the motor stator core is mainly determined by the loss of the stator core and the loss of the stator winding. Remember P Cu is the generator stator winding loss, P Fe is the generator stator core loss. R c1 is the thermal resistance of heat from the surface of the winding end to the air; R c2 is the thermal resistance of heat from the winding surface in the ventilation channel to the air...

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 discloses a method for state monitoring and early fault warning of a stator core of a ship generator. The method comprises the steps of (1) establishing a ransient state temperature rise mathematic model based on temperature rise, a generator structure and operation parameters of the stator core of the ship generator; (2) acquiring data of the generator in operation and using the data as sample data when the working condition of the ship generator changes, and applying a least square method to perform parameter identification on the established transient state temperature rise mathematic model; and (3) comprehensively judging a generator state by means of dynamic judgment and static judgment methods and achieving early warning of generator faults. Parameters of the transient state temperature rise mathematic model in the method reflect a technical state of the generator, the system parameter change situation is obtained by identifying a core temperature model in real time and is comprehensively judged with a rated temperature rise difference, the generator state can be accurately judged, and the early fault warning of the stator core of the generator is achieved.

Description

technical field [0001] The invention relates to the monitoring of the state of a generator, in particular to a method for state monitoring and fault early warning of a stator core of a marine generator. Background technique [0002] The generator is a kind of electromechanical energy conversion mechanism. In the process of energy conversion, losses are inevitably generated. Most of these losses eventually turn into heat. The cooling medium will take part of them away, and the rest will increase the temperature of various parts of the motor. . Generator losses can be divided into three categories: core loss, winding loss and mechanical loss according to the generated parts. The stator core loss and winding loss account for a considerable proportion of the entire motor loss. Motor overload operation, asymmetrical operation, cooling system failure, iron core failure, insulation failure, etc. will cause overheating of the stator core of the motor and increase its temperature r...

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): G01R31/34
Inventor 刘宁波向东熊浩于飞吴强孟光伟
Owner NAVAL UNIV OF ENG PLA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com