Switched-Mode Power Supply Current Limiting for Smooth Overload Transitions
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Solution Overview
Problem
Existing electrical energy supply devices lack a flexible and adaptive current limiting mechanism that can smoothly transition between different output current levels in response to varying load demands and overload conditions, potentially leading to abrupt changes and safety risks.
Innovation Solution
Implement a current limiting function with a temporal dependency that allows for arbitrary function profiles, enabling smooth transitions between output current levels through a limiting current function that can be user-defined and includes a transition function to manage overload conditions, reducing abrupt changes and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed nominal current limit is used in the current limiting apparatus, then the device structure is simple, but the adaptability to different load conditions is poor
Solution Approach 1:
The patent applies the dynamics principle by implementing a temporal dependency in the limiting current function, allowing the current limit to dynamically change over time based on predefined profiles. The limiting current is no longer fixed but varies according to a temporal function that can be configured for different operating conditions, enabling the system to adapt to varying load demands without requiring complex hardware modifications
Solution Approach 2:
The patent applies parameter changes by modifying the limiting current parameter through a temporal dependency function. The limiting current value changes over time according to predefined profiles, allowing the system to adapt to different load conditions by adjusting this key parameter dynamically rather than through structural changes
2Reliability
If the limiting current is abruptly changed in response to overload conditions, then the response speed is fast, but safety risks such as overheating and fire increase
Solution Approach 1:
The patent applies beforehand cushioning by implementing a temporal dependency function that predefines how the limiting current should change over time during overload conditions. Instead of abrupt current changes, the system uses predefined temporal profiles that smoothly transition the current limit, cushioning against sudden stress on the system while maintaining safety
Solution Approach 2:
The patent applies the intermediary principle by introducing a temporal dependency function as a mediator between the overload detection and the current limiting action. This intermediary function smoothly transitions the limiting current over time according to predefined profiles, preventing abrupt changes while maintaining effective overload protection
3Adaptability or versatility
If multiple limiting current functions are provided for user selection, then the versatility and adaptability improve, but the device complexity increases
Solution Approach 1:
The patent applies universality by enabling a single current limiting apparatus to perform multiple functions through selectable limiting current functions. The system can be configured with different temporal dependency profiles to handle various operating scenarios, making the device universally applicable to different load conditions without requiring separate hardware for each scenario
Data Source
AI summary
A method for operating an electrical energy supply device, in particular a switched-mode power supply device for supplying electrical energy to electrical components from an energy source. A computer program is also provided for carrying out a method of this type, as well as an electrical energy supply device, which is configured to carry out a method of this type.