TLVR Secondary-Loop Fault Detection Using Phase Switching
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Solution Overview
Problem
Existing trans-inductor voltage regulators (TLVRs) face operational issues due to faults such as open-circuits or short-circuits in their secondary windings and compensation inductors, leading to improper operation and potential damage to components.
Innovation Solution
A phase controller in the TLVR system alternately drives pairs of power stages to detect faults by monitoring current and voltage conditions, identifying over-currents and negative voltages at switching nodes to determine the presence of secondary-loop faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fault detection mechanisms are added to the TLVR, then reliability is improved, but device complexity increases
Solution Approach 1:
The system performs self-diagnosis by automatically detecting faults in its own components. The phase controller monitors current and voltage conditions to identify open-circuit or short-circuit faults in secondary windings and compensation inductors without requiring external testing equipment, enabling the system to detect and report its own defects.
Solution Approach 2:
The fault detection mechanism uses feedback from current and voltage sensors to continuously monitor the operational state of secondary-loop components. When abnormal conditions are detected (such as over-current or negative voltage at switching nodes), the system receives feedback signals that trigger fault identification and appropriate control responses.
2Measurement precision
If alternative driving of power stages is implemented for fault detection, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The phase controller alternately drives different power stages in a periodic manner to test for faults. By systematically switching between driving and non-driving states of power stages, the system periodically checks for abnormal conditions such as over-current or negative voltage, enabling comprehensive fault detection across all secondary-loop components through repeated cyclic testing.
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
Effectively detects and indicates secondary-loop faults, preventing further damage and ensuring proper operation of the TLVR by isolating faulty components.
Implementation Method 1
each power stage is coupled with a corresponding transformer (known as 'trans-inductor') with a respective primary winding and a secondary winding
Data Source
AI summary
Faults in the secondary-loop of a trans-inductor voltage regulator (TLVR) are detected. Each power stage of the TLVR is connected to a primary winding of a respective transformer in the TLVR. The secondary windings of the transformers and a compensation inductor form a secondary-loop. A phase controller in the TLVR operates to both drive a first power stage to an ON state and to place a second power stage in an OFF state in a first duration. In the first duration, if the first power stage draws a current less than a maximum threshold and if a voltage at the switching node of the second power stage is negative, the phase controller determines that no faults exist in the series secondary circuit. Otherwise, the phase controller determines that one or more faults exist in the series secondary circuit.