DC to DC Boost Converter Using Parallel Inductor Charging
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Solution Overview
Problem
Existing DC to DC boost converters rely on the inductive emf of an inductor to directly charge a capacitor and then supply power to a load, limiting the role of the DC source and inductor, whereas the proposed system uses a DC power source to charge storage capacitors independently, ensuring the inductor is never in a current loop with the load, allowing for more efficient voltage regulation and power distribution.
Innovation Solution
The system employs a controller to manage the charging and discharging of multiple storage capacitors, using an emf switch to intermittently charge capacitors to voltages higher than the output voltage, and output devices to regulate the discharge to the load, ensuring efficient power transfer without the inductor being in a current loop with the load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the inductor is used in a current loop with the load to directly charge the output capacitor, then the voltage can be boosted using inductive emf, but the DC source and inductor remain continuously connected to the load causing increased stress and reduced efficiency
Solution Approach 1:
The patent extracts the DC source and inductor from the continuous current loop with the load. Instead of direct connection, the inductor charges storage capacitors independently, and these capacitors then supply power to the load. This separation removes the harmful continuous stress from the DC source and inductor while maintaining the voltage boosting function.
Solution Approach 2:
Storage capacitors are introduced as intermediary energy storage elements between the inductor and the load. The inductor charges these capacitors to voltages above the output voltage, and the capacitors then discharge to provide power to the load. This intermediary approach enables efficient power transfer without direct continuous connection.
2Stability of the object's composition
If the DC source continuously charges the inductor which then charges the output capacitor, then the output voltage can be maintained, but the system complexity increases due to continuous switching and current loop management
Solution Approach 1:
The inductor pre-charges the storage capacitors to voltages above the required output voltage before the load needs the power. This preliminary charging action simplifies the control scheme because the capacitors are already prepared to supply power to the load without requiring complex real-time switching control to maintain output voltage stability.
Solution Approach 2:
The system uses periodic intermittent charging of the storage capacitors by the inductor, followed by periodic discharge to the load. This periodic action pattern simplifies the control logic compared to continuous switching, as the controller only needs to manage discrete charging and discharging cycles rather than continuous current regulation.
3Productivity
If the inductor operates at high frequency to quickly charge the output capacitor, then the power delivery speed increases, but the inductor experiences increased losses and the DC source is continuously engaged
Solution Approach 1:
The patent extracts the high-frequency switching operation from the DC source connection. The inductor operates at high frequency to quickly charge the storage capacitors, but the DC source is only engaged during these intermittent charging phases, not continuously during power delivery to the load. This reduces inductor losses and DC source engagement time while maintaining fast power delivery capability.
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 allows for efficient voltage regulation and power distribution, minimizing output voltage ripple and enabling the DC power source to provide power to control circuitry, while preventing the DC voltage source or inductor from being in a current loop with the load, thus enhancing the operational efficiency of the DC to DC boost converter.
Implementation Method 1
The DC power source is used to establish a current in the inductor in the inductive emf circuit. This inductor current is then reduced or 'turned off' quickly to produce an emf in the inductor.
Data Source
AI summary
A high frequency inductive emf circuit charges storage capacitors, one at a time, from a DC source to a voltage that is higher than the DC output voltage. After each storage capacitor is charged, it is disconnected from the charging circuit and then connected to an output device/regulator that uses the energy in each storage capacitor to provide the desired DC output voltage to a load. While one storage capacitor is being charged, a previously charged storage capacitor is being discharged through an output device/regulator. After being discharged, each storage capacitor is disconnected from its output device/regulator and reconnected to the charging circuit and is charged again. While being charged, the storage capacitors are in a parallel circuit to the inductor in the charging circuit. The inductor in the charging circuit and the DC source are never in a current loop with the load.