Inductively Coupled Interconnections for Power Balancing
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Solution Overview
Problem
Power modules with parallel components face challenges in balancing current/power due to parameter variations among switchable current paths, leading to unbalanced current distribution and reduced system reliability.
Innovation Solution
The implementation of a power circuit with inductively coupled interconnections between switch circuits to balance current flowing through parallel switch modules, utilizing mutual inductance coupling to improve current/power balance during switching operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If parallel power components are used to increase power capacity, then power capacity is improved, but current/power balance among components deteriorates due to parameter variations
Solution Approach 1:
The patent employs feedback mechanisms through sense resistors that monitor current flow through each parallel power component. The control circuit receives feedback signals from these sense resistors and adjusts gate driver signals accordingly to equalize current distribution among parallel components, resolving the contradiction between maintaining high power capacity and ensuring current balance.
Solution Approach 2:
The patent dynamically adjusts operating parameters (gate voltages, switching timings) of parallel power components based on detected current levels. By changing these parameters in real-time, the system maintains current balance among parallel components while operating at high power capacity, preventing any single component from being overloaded.
2Reliability
If driver circuits are added to equalize current among parallel components, then current balance is improved, but device complexity increases
Solution Approach 1:
The patent merges the current equalization function with the existing gate driver circuitry for parallel power components. Rather than adding separate complex equalization circuits, the control circuit integrates sensing and control functions into a unified structure that shares common elements with the power component control, reducing overall device complexity while maintaining current balance.
Solution Approach 2:
The control circuit performs multiple functions: it drives the gate of power components, senses current through sense resistors, compares current levels, and generates corrective signals. This multi-functional approach eliminates the need for separate dedicated equalization circuits, reducing device complexity while achieving current balance.
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
This approach effectively balances transient and steady-state currents among switch modules, enhancing the reliability and efficiency of power distribution in systems like hybrid vehicles and wind energy systems by reducing current differences and overshoot peaks.
Implementation Method 1
a first interconnection and a second interconnection of the interconnections are inductively coupled to balance the current flowing through the first switch circuit and the second switch circuit
Data Source
AI summary
Aspects of the disclosure provide a power circuit that includes a first switch circuit in parallel with a second switch circuit. The first switch circuit and the second switch circuit are coupled to a first driving node, a second driving node, a source node and a drain node via interconnections. The power circuit receives a control signal between the first driving node and the second driving node to control a current flowing from the drain node to the source node through the first switch circuit and the second switch circuit. In the power circuit, a first interconnection and a second interconnection of the interconnections are inductively coupled to balance the current flowing through the first switch circuit and the second switch circuit.