Virtual temperature sensor, temperature measurement method, motor over-temperature protection system and automobile

A temperature sensor, over-temperature technology, applied in the automotive field, can solve problems such as affecting the motor insulation life of passengers' personal safety, increasing raw material research and development, manufacturing and maintenance costs, etc.

Pending Publication Date: 2020-12-29
UNITED AUTOMOTIVE ELECTRONICS SYST
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, only arranging a temperature sensor in a certain phase winding will cause a large error between the collected temperature signal data and the real maximum temperature of the winding, which will seriously affect

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
  • Virtual temperature sensor, temperature measurement method, motor over-temperature protection system and automobile
  • Virtual temperature sensor, temperature measurement method, motor over-temperature protection system and automobile
  • Virtual temperature sensor, temperature measurement method, motor over-temperature protection system and automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. The advantages and features of the present invention will be more apparent from the following description. It should be noted that all the drawings are in very simplified form and use imprecise scales, which are only used to facilitate and clearly assist the purpose of the embodiments of the present invention.

[0059] At present, motors used in vehicles are usually multi-phase motors, and the temperature of the motor windings is monitored by arranging a temperature sensor on a certain phase winding. However, under conditions such as low-speed climbing conditions and locked-rotor conditions, the torque and load current requirements are large, which will affect the temperature rise between the windings of the multi-phase motor, so that only relying on the windings arranged on one of the phase windings Temperature sensors are not accura...

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 provides a virtual temperature sensor, a temperature measurement method, a motor over-temperature protection system and an automobile. The virtual temperature sensor is used for acquiring the temperature of a multi-phase winding of a motor, and comprises a plurality of winding temperature nodes arranged on phases of the winding correspondingly, a temperature test node arranged on a certain phase of the winding or an iron core of the motor, a motor cooling node arranged at the cooling position of the motor, and a plurality of equivalent thermal resistors arranged among the nodes;and the virtual temperature sensor calculates and obtains the temperature of each winding temperature node by using a thermal network method, and outputs the maximum value in the temperature of phasesof the winding as the temperature of the motor winding. The virtual temperature sensor can accurately output the highest temperature of the motor winding when the motor is in some special working conditions (such as a low-speed climbing working condition and a locked-rotor working condition) so that over-temperature protection can be timely carried out on the motor, and the influence of over-temperature of each phase of the winding on the service life of the motor is avoided.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a virtual temperature sensor and a temperature measuring method, a readable storage medium, a motor over-temperature protection system and protection method, and an automobile. Background technique [0002] During the load operation of the permanent magnet synchronous motor, the current and resistance in the winding will cause copper loss, resulting in temperature rise of the motor. Especially under the action of some short-term peak currents, the copper loss cannot be conducted due to the slot insulation paper wrapping and the existence of air gaps, causing the winding temperature to rise sharply. In order to obtain the real-time temperature of the winding in time and avoid over-temperature damage to the motor, it is necessary to measure the winding temperature in real time. [0003] At present, motors used in vehicles are usually multi-phase motors, and the temperature of ...

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
IPC IPC(8): G01N25/20G01R31/34
CPCG01N25/20G01R31/343Y02T10/64
Inventor 徐鲁永陈益辉黄宜坤朱文举陈驾宇郑力夫
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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