Boost Converter Design to Eliminate Reverse Currents
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Summary
Problems
Conventional boost converters experience inefficiency due to reverse inductive currents caused by resonance between the boost inductor and parasitic capacitors, leading to heat consumption and reduced output efficiency.
Innovation solutions
A boost converter design incorporating a resonant circuit and a discharging circuit, where the resonant circuit is selectively enabled to resonate with the inductor and parasitic capacitor, and the discharging circuit controls energy release to minimize reverse currents, thereby optimizing inductive current flow and reducing heat consumption.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the boost inductor resonates with the parasitic capacitor of the power switch element, then the circuit operates naturally, but reverse inductive current is generated causing heat consumption and reduced output efficiency
Why choose this principle:
The patent applies the principle of converting harm into benefit by introducing a resonant circuit that deliberately resonates with the parasitic capacitor at the same frequency as the reverse inductive current. This converts the harmful resonance effect into a useful one, where the resonant circuit generates a compensating current that cancels out the reverse inductive current, thereby eliminating heat consumption and improving output efficiency.
Principle concept:
If the boost inductor resonates with the parasitic capacitor of the power switch element, then the circuit operates naturally, but reverse inductive current is generated causing heat consumption and reduced output efficiency
Why choose this principle:
The resonant circuit acts as an intermediary element between the boost inductor and the parasitic capacitor. By introducing this intermediate resonant circuit with carefully selected inductance and capacitance values, the patent mediates the interaction between the inductor and parasitic capacitor, controlling the resonance behavior to prevent harmful reverse currents while maintaining efficient energy transfer.
Application Domain
Data Source
AI summary:
A boost converter design incorporating a resonant circuit and a discharging circuit, where the resonant circuit is selectively enabled to resonate with the inductor and parasitic capacitor, and the discharging circuit controls energy release to minimize reverse currents, thereby optimizing inductive current flow and reducing heat consumption.
Abstract
A boost converter includes a first inductor, a power switch element, an output stage circuit, a controller, a resonant circuit, and a discharging circuit. The first inductor receives an input voltage. The power switch element includes a parasitic capacitor. The output stage circuit includes a first resistor. The output stage circuit generates an output voltage. The controller detects the resistive voltage of the first resistor, and generates a clock voltage, a first control voltage, and a second control voltage according to the resistive voltage. The resonant circuit is coupled to the first inductor, and is selectively enabled or disabled according to the first control voltage. When the resonant circuit is enabled, the resonant circuit resonates with the first inductor and the parasitic capacitor, so as to fine-tune an inductive current flowing through the first inductor.