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

Junction Temperature Estimation Method and Motor Controller

A motor controller, junction temperature technology, applied in the field of electronic control, can solve problems such as inaccurate measurement results and abnormal cooling system

Active Publication Date: 2021-02-23
SUZHOU INOSA UNITED POWER SYST CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a junction temperature estimation method, aiming to solve the technical problem that the existing power device junction temperature measurement method is easily affected by the abnormality of the cooling system, which makes the measurement results inaccurate

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
  • Junction Temperature Estimation Method and Motor Controller
  • Junction Temperature Estimation Method and Motor Controller
  • Junction Temperature Estimation Method and Motor Controller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating description of the present invention and has no specific meaning by itself. Therefore, 'module', 'part' or 'unit' may be used in combination.

[0034] In the embodiment of the present invention, the junction temperature estimation terminal (also called terminal, device or terminal device) can be a device with data computing capabilities such as a PC and a smart phone, or a component that can collect information such as temperature, and the two can communicate with each other , to complete the scheme of junction temperature estimation for this application.

[0035] Such as figure 1 As shown, the terminal may include: a processor 1001 , such as a CPU, a network interface 1004 , a user ...

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 estimating junction temperature. The method includes: when the motor corresponding to the motor controller is in a locked-rotor state, acquiring the flow rate of the cooling liquid; if the flow rate of the cooling liquid is within the first preset range, then calculate the self-temperature of the temperature sensor according to the temperature value of the cooling liquid, the heating power of the power device, and the first thermal resistance parameter between the cooling liquid and the temperature sensor; The temperature of the temperature sensor itself, the heating power of the power device and the second thermal resistance parameter between the temperature sensor and the power device determine the junction temperature of the power device. The invention also discloses a motor controller. The invention makes the estimated junction temperature of the power device more accurate by flexibly adjusting the thermal resistance parameter, and is not easily disturbed by the external environment.

Description

technical field [0001] The invention relates to the field of electric control, in particular to a junction temperature estimation method and a motor controller. Background technique [0002] As the core unit of the vehicle, the controller provides an appropriate output torque for the vehicle by converting direct current into alternating current. The IGBT (Insulated Gate Bipolar Transistor) in the controller generates a lot of heat when it is working. Therefore, it is necessary to carry out reasonable thermal design for protection, such as cooling system, junction temperature estimation and protection strategy. It is known that the junction temperature refers to the actual operating temperature, because the IGBT is integrated in the controller, and currently only through wafer sticky thermocouples, The infrared thermometer tests the blackened power device to measure the IGBT junction temperature, but the measurement result is the average temperature, which is not accurate eno...

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): H05K7/20B60L15/00
CPCB60L15/00H05K7/20945
Inventor 李锡鹏郑威王才兵
Owner SUZHOU INOSA UNITED POWER SYST CO LTD
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