Partial Power Converter for DC-DC Voltage Boosting
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Solution Overview
Problem
Existing DC-DC converters do not effectively increase input voltage while handling a reduced portion of power delivered by an energy system, leading to inefficiencies and increased stress on semiconductors and transformers.
Innovation Solution
A partial power converter (PPC) with a transformer having a primary winding and two secondary windings, connected in series with a MOSFET transistor and diodes, which reduces the power processed and increases output voltage, thereby reducing semiconductor and transformer stress, and improving voltage and current quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a conventional DC-DC converter processes the full power delivered by the energy system, then the voltage can be increased, but the stress on semiconductors and transformers increases and efficiency decreases
Solution Approach 1:
The patent applies partial action by introducing a bypass path that allows only a portion of the input power to be processed by the converter circuitry. The bypass capacitor conducts a fraction of the input current directly to the output, while the converter processes only the remaining portion. This reduces the stress on semiconductors and transformers by limiting the power they must handle, while still achieving the required voltage conversion.
2Loss of energy
If a conventional DC-DC converter processes full power, then voltage conversion is achieved, but semiconductor losses and transformer losses increase
Solution Approach 1:
The bypass architecture enables partial power processing where only a portion of the total power undergoes conversion through the converter circuitry. The bypass capacitor handles the remaining power directly, minimizing the power that must be processed by loss-generating components. This significantly reduces semiconductor and transformer losses while maintaining full power conversion capability.
Solution Approach 2:
The patent merges two power paths: a bypass path through the capacitor and a conversion path through the converter circuitry. These paths operate simultaneously and are combined at the output, allowing the system to achieve both efficient power transfer (via bypass) and voltage conversion (via converter) with minimal total losses.
3Productivity
If the converter handles reduced power portion, then efficiency is improved and stress is reduced, but the voltage increase capability must be optimized
Solution Approach 1:
The bypass capacitor handles a controlled portion of the power directly, allowing the converter to operate at optimized power levels for maximum efficiency. The converter is sized and designed to handle only the necessary portion of power conversion, achieving high efficiency while maintaining the required voltage conversion ratio through optimized component selection and control.
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
The PPC efficiently increases input voltage, reduces power processing, and enhances efficiency by minimizing semiconductor and transformer losses, while maintaining stable voltage and current, thus improving overall energy system performance.
Implementation Method 1
a transformer with a primary winding (Np) and two secondary windings (Ns1, Ns2)
Implementation Method 2
the primary winding (Np) is connected in series to the transistor (M1) of the Metal Oxide Semiconductor Field Effect Transistor type
Implementation Method 3
the two secondary windings (Ns1, Ns2), both with the same number of turns, are connected, each one, in series by means of a terminal, with the diodes (D1, D2), respectively
Implementation Method 4
an input capacitor (Cpv)... the other terminal of the secondary winding (Ns2) is connected to one of the terminals of the transistor (M1), the output capacitor (c dc ) serves as a link to connect to a next stage
Data Source
Figure 1~3
Figure 4~6
Figure 7(a)~7(g)
AI summary
A partial power converter (PPC) in an electrical power system, comprising an input capacitor connected in parallel to a power source vpv and connected to a primary winding of a transformer, wherein the primary winding is connected in series to a M1 transistor of the MOSFET (Metal Oxide Semiconductor Field Effect Transistor) type, wherein two secondary windings Ns1 and Ns2 - both with the same number of turns, are connected, each one, in series by means of a terminal, with diodes D1 and D2, respectively, and said diodes D1 and D2 are connected to the respective ends of a capacitor Cdc output; the other terminal of the secondary winding Ns1 of the transformer is connected to one of the terminals of the primary winding, whereas the other terminal of the secondary winding Ns2 is connected to one of the terminals of transistor M1, and wherein the output capacitor Cdc serves as a link to connect to a next stage.