Phase Balancer Using DC Transformer for Unity Power Factor
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Solution Overview
Problem
Existing phase balancing systems for multi-phase power sources often reduce power efficiency and power factor due to the need for capacitors to create a pseudo neutral node, which draw leading current.
Innovation Solution
The use of power conversion circuits operatively coupled between phase-nodes and a direct current transformer, eliminating the need for capacitors to form a pseudo neutral node, allowing for phase balancing without leading current draw and operating at unity power factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If capacitors are used to create a pseudo neutral node for phase balancing, then phase balancing is achieved, but power efficiency and power factor deteriorate due to leading current draw
Solution Approach 1:
The patent removes the capacitor-based pseudo neutral node from the system and replaces it with a transformer-based virtual neutral point. This extraction eliminates the harmful leading current draw while preserving the phase balancing function. The transformer couples the power conversion circuits without requiring capacitive elements, thereby solving the contradiction between achieving phase balance and maintaining power efficiency.
Solution Approach 2:
The patent introduces a transformer as an intermediary element to create a virtual neutral point that mediates between the phase conversion circuits. This transformer-based intermediary provides the necessary reference point for phase balancing without the adverse effects of capacitor-based pseudo neutral nodes, enabling phase balance while avoiding leading current draw and maintaining unity power factor.
2Stability of the object's composition
If capacitors are used to create a pseudo neutral node, then phase balancing is achieved, but power factor deteriorates due to leading current
Solution Approach 1:
The patent extracts and removes the capacitor elements that generate leading current from the phase balancing system. By replacing the capacitor-based pseudo neutral node with a transformer-based virtual neutral point, the harmful leading current is eliminated while the phase balancing functionality is preserved through the transformer's ability to provide a stable reference point.
Solution Approach 2:
The patent converts the harmful leading current effect into a beneficial unity power factor operation. By using the transformer to create the virtual neutral point instead of capacitors, the system achieves phase balancing while the current drawn is in phase with the voltage, transforming the harmful leading current characteristic into a beneficial unity power factor characteristic.
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 solution achieves phase balancing with high efficiency and unity power factor by moving energy and current between power conversion circuits using a direct current transformer, effectively correcting phase imbalances and harmonic distortions without reducing power factor.
Implementation Method 1
a direct current transformer operatively coupled to a direct current bus of each of the plurality of power conversion circuits to move energy between the plurality of power conversion circuits
Data Source
AI summary
A phase balancer includes a plurality of power conversion circuits, a direct current transformer, and a plurality of phase-nodes. Each of the power conversion circuits may include a throughput, a capacitor bank, and a direct current bus. The direct current transformer may be coupled to each of the direct current buses to move energy between the power conversion circuits. Each throughput may be operatively coupled to the capacitor bank of one power conversion circuit and the throughput of another power conversion circuit to move current between the plurality of power conversion circuits.