Multi-Voltage Distribution Transformer for Existing Service Cables
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Solution Overview
Problem
The existing service cables at residential sites are often insufficient to meet the increasing demand for electrical energy, requiring frequent replacements and resulting in high costs due to the complexity and expense of underground infrastructure modifications.
Innovation Solution
A distribution transformer system that provides multiple secondary voltages to different residential sites, allowing for the use of existing service cables to deliver higher amounts of electricity by stepping down higher grid voltages to appropriate residential voltages, such as 120V and 480V.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If larger service cables are installed to meet increasing electrical demand, then the electrical energy transfer capacity is improved, but the device complexity and installation cost increase significantly
Solution Approach 1:
The patent changes the voltage parameter in the electrical distribution system by introducing a secondary transformer at the customer premises that steps up the voltage from standard 120V/240V to higher voltages (e.g., 480V, 600V, or higher). This allows existing service cables to transmit greater electrical power (P=VI) without increasing cable size, thereby maintaining electrical energy transfer capacity while avoiding the complexity and cost of cable replacement infrastructure work.
2Power
If service cables are replaced with larger cables to provide higher current service, then the current capacity is improved, but the installation cost and time increase
Solution Approach 1:
The invention transforms the power delivery approach by changing the voltage parameter rather than the current parameter. The secondary transformer steps up the voltage to deliver higher power through the existing cables at reduced current levels, or maintains current while increasing voltage for higher power capacity. This avoids the time-consuming process of excavating, removing, and installing new service cables.
3Ease of manufacture
If existing service cables are used to deliver higher amounts of electricity, then the installation cost is reduced, but the electrical energy transfer capacity is limited
Solution Approach 1:
The patent introduces a secondary transformer as an intermediary device at the customer premises that enables existing service cables to deliver higher electrical energy. The transformer converts standard distribution voltage to higher voltages, allowing the cables to transmit more power without physical modification. This intermediary device bridges the gap between limited cable capacity and high power demand.
Solution Approach 2:
By changing the voltage parameter through the secondary transformer, the system allows existing cables to operate at higher power levels. The transformer enables voltage escalation from standard residential levels to commercial/industrial levels, dramatically increasing the electrical energy transfer capacity of the same physical infrastructure.
4Adaptability or versatility
If multiple transformers are installed to provide different voltages to different sites, then the voltage adaptability is improved, but the device complexity increases
Solution Approach 1:
The secondary transformer is designed as a multi-functional device that can provide multiple output voltages (e.g., 120V, 240V, 480V, 600V, and higher) from a single unit. This universal transformer replaces the need for multiple specialized transformers, reducing overall system complexity while maintaining the ability to serve different voltage requirements at various customer premises.
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 enables a greater quantity of electricity to be delivered to residential sites using existing service cables, reducing the need for frequent replacements and associated costs, while maintaining efficient and safe electrical distribution.
Implementation Method 1
A distribution transformer is utilized near residential sites, for example, for connecting to the source grid and providing electrical energy to the nearby residential sites at lower voltage than that found in the source grid
Implementation Method 2
The distribution transformer includes a ferromagnetic core; a primary winding configured to be connected to a source grid at source grid voltage
Data Source
AI summary
A distribution transformer for use in a providing electrical power to sites, includes a ferromagnetic core; a primary winding configured to be connected to a source grid at source grid voltage; and a secondary winding configured to be coupled to service cables to supply electrical energy to at least one of the sites at a first line voltage and at least another of the sites at a second line voltage, wherein the second line voltage is higher than the first line voltage.