18425008. JUNCTION TEMPERATURE ESTIMATION simplified abstract (ROLLS-ROYCE plc)
Contents
JUNCTION TEMPERATURE ESTIMATION
Organization Name
Inventor(s)
Peter J Cox-smith of Derby (GB)
Jonathan C Nicholls of Derby (GB)
Mark Sweet of Chesterfield (GB)
JUNCTION TEMPERATURE ESTIMATION - A simplified explanation of the abstract
This abstract first appeared for US patent application 18425008 titled 'JUNCTION TEMPERATURE ESTIMATION
The disclosure pertains to estimating junction temperatures of transistors in power electronics converters. Example embodiments include a method to estimate the junction temperature of a transistor in a converter that converts between different supply voltages.
- Providing a gate switching signal to the transistor
- Measuring the rate of change of current through the converter during a switching period
- Outputting an estimated junction temperature based on the measured rate of change of current
This innovation allows for accurate estimation of transistor junction temperatures in power electronics converters, enhancing performance and reliability.
Potential Applications: - Power electronics systems - Renewable energy converters - Electric vehicles
Problems Solved: - Ensuring optimal performance of transistors - Preventing overheating and damage
Benefits: - Improved efficiency and reliability - Enhanced lifespan of power electronics components
Commercial Applications: Title: "Advanced Junction Temperature Estimation Technology for Power Electronics" This technology can be utilized in various industries such as renewable energy, electric vehicles, and industrial automation, leading to more efficient and reliable systems.
Questions about Junction Temperature Estimation: 1. How does accurate junction temperature estimation impact the overall performance of power electronics converters? Accurate junction temperature estimation ensures optimal performance and prevents overheating, leading to increased efficiency and reliability.
2. What are the key factors that affect the accuracy of junction temperature estimation in power electronics converters? Factors such as gate switching signals, current measurement during switching periods, and voltage thresholds play a crucial role in accurately estimating junction temperatures.
Original Abstract Submitted
The disclosure relates to estimation of junction temperatures of transistors in a power electronics converter. Example embodiments include a method of estimating a junction temperature of a transistor in a power electronics converter configured to convert between first and second supply voltages, the method comprising: providing a gate switching signal to the transistor; measuring a rate of change of current through the converter during a switching period of the transistor; and outputting an estimated junction temperature of the transistor based on the measured rate of change of current, wherein the rate of change of current is measured while a gate voltage of the transistor is above a gate threshold voltage and a drain-source voltage across the transistor is above a predetermined fraction of the first or second supply voltage whereby the rate of change of current is measured in a linear region.
