Power Semiconductor Telemetry for Remaining Lifetime Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Power electronic devices lack real-time monitoring and predictive maintenance capabilities, leading to premature replacement, unnecessary downtime, and environmental waste due to unpredictable failures and unknown degradation states.
Innovation Solution
An electronic system with a data acquisition and processing unit that receives telemetry information from sensors to estimate the remaining lifetime of power semiconductor devices and adjust operating parameters, implementing critical condition detection and handling capabilities such as limiting current or switching frequency to prevent failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power electronic devices are replaced early based on conservative lifetime estimates, then system reliability is improved, but device lifetime and cost efficiency deteriorate
Solution Approach 1:
The system implements continuous monitoring of degradation indicators (temperature, current, voltage, switching frequency) and uses this feedback to dynamically update remaining lifetime estimates. This allows the system to adapt replacement decisions based on actual device condition rather than conservative fixed schedules, resolving the contradiction between maintaining high reliability and extending device lifetime.
Solution Approach 2:
The system performs preliminary detection of degradation trends and predicts remaining lifetime before critical failure occurs. By identifying degradation early and taking preventive actions (adjusting operating parameters, scheduling maintenance), the system avoids catastrophic failures while preventing premature replacement, thus extending device lifetime without compromising reliability.
2Reliability
If large safety margins are designed into power electronic devices, then reliability is improved, but productivity and efficiency deteriorate
Solution Approach 1:
The system transitions from static safety margins to dynamic operating parameters. Operating conditions (current, voltage, switching frequency, temperature limits) are continuously adjusted based on real-time degradation state. When devices are healthy, they operate at higher efficiency points; when degradation is detected, parameters are adjusted to maintain reliability. This dynamic approach eliminates the need for permanently reduced operating margins.
Solution Approach 2:
The system changes operating parameters (current, voltage, switching frequency, duty cycle) based on detected degradation levels. Healthy devices operate at optimal efficiency parameters, while degraded devices have parameters adjusted to compensate for wear. This allows the system to maintain reliability without permanently sacrificing productivity, as parameters are optimized for each device's actual condition.
3Reliability
If conservative operating areas are used, then reliability is improved, but energy efficiency and productivity deteriorate
Solution Approach 1:
The system dynamically adjusts operating points based on real-time degradation monitoring. Devices operate at high-efficiency conservative areas only when degradation indicators suggest they are healthy. When degradation is detected, the system transitions to protective operating modes that maintain reliability while minimizing energy waste from premature replacement. This dynamic adjustment eliminates the need for permanently conservative operation.
Solution Approach 2:
The monitoring system enables devices to self-adjust their operating parameters based on their own degradation state. Healthy devices automatically operate at optimal efficiency points, while degraded devices self-regulate to protective modes. This self-service capability eliminates the need for external conservative constraints, allowing each device to optimize its own energy efficiency while maintaining reliability.
4Device complexity
If no real-time monitoring is implemented, then device complexity is reduced, but loss of information about degradation state increases
Solution Approach 1:
The monitoring system uses existing sensors (temperature, current, voltage) for multiple purposes: their primary function plus degradation detection. By extracting additional information from existing measurements through advanced algorithms, the system gains degradation state awareness without adding dedicated complex sensing hardware, thus minimizing the increase in device complexity while reducing information loss.
Data Source
AI summary
An electronic device includes: an interface configured to receive telemetry information for one or more power semiconductor devices; and a data acquisition and processing unit. The data acquisition and processing unit may be configured to periodically update an estimate of a remaining lifetime of the one or more power semiconductor devices, based on the telemetry information collected during use of the one or more power semiconductor devices and received at the interface. The data acquisition and processing unit may be configured to adjust one or more operating parameters for each of the one or more power semiconductor devices that has reached a predetermined level of degradation as determined by the telemetry information. An electronic system that includes the electronic device is also described.