Single-Pin Over-Current Protection for Power Generators
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Solution Overview
Problem
Existing over-current protection devices for power generators require specific control pins to set functions, making it impossible to determine if the load current is too high without these pins, limiting their effectiveness.
Innovation Solution
An over-current protection device with a detection and control module that receives signals through a single pin, detecting voltage and current conditions to output control signals and execute auto-trim measurements, eliminating the need for extra control pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If specific control pins are used to set over-current protection functions, then the power generator can detect load current and implement protection, but the device complexity increases and requires additional control pins
Solution Approach 1:
The patent combines multiple functions (over-current protection detection, function setting, and status control) into a single control pin. The detection and control module receives signals through this unified pin to determine both the need for protection and the protection threshold, eliminating the need for separate control pins while maintaining full protection capability
Solution Approach 2:
The single control pin serves multiple purposes: it receives signals for setting over-current protection functions, determines protection thresholds, and controls the protection activation. This multi-functional design replaces what would traditionally require multiple dedicated pins, reducing device complexity while preserving reliability
2Device complexity
If control pins are removed to simplify the device, then device complexity decreases, but the ability to determine whether load current is too high is lost
Solution Approach 1:
The detection and control module autonomously determines protection thresholds and activates protection based on signals received through the single control pin. The system self-configures its protection parameters without requiring external control pins, maintaining detection capability while simplifying the device interface
Solution Approach 2:
The system uses feedback signals received through the control pin to automatically adjust and determine protection thresholds. The detection module continuously monitors load current and compares it against dynamically determined thresholds, enabling accurate detection without additional control pins
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables effective over-current protection by detecting voltage and current conditions without additional control pins, allowing for automatic adjustments and data storage, thereby enhancing the power generator's protection capabilities.
Implementation Method 1
the detection and control module detects a current signal according to a voltage difference between the first signal and the second signal
Data Source
AI summary
An over-current protection device for a power generator includes a first pin, configured to receive a signal; a detection and control module, coupled to the first pin, and configured to detect the signal to determine whether the signal conforms to a pre-determined condition or not, and to output a control signal when the signal conforms to the pre-determined condition; and an auto-trim and memory module, coupled to the detection and control module, configured to receive the control signal from the detection and control module, wherein the auto-trim and memory module is configured to execute a plurality of auto-trim measurements and to store adjustment data corresponding to the plurality of auto-trim measurements; a second pin, coupled to the detection and control module, configured to receive a second signal.