Hybrid Transformer Zigzag Winding Harmonics Reduction
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Solution Overview
Problem
Existing electrical transformers face inefficiencies due to harmonics and current unbalance issues, requiring separate devices for harmonics reduction and current unbalance compensation, which increases investment and space costs.
Innovation Solution
A hybrid transformer design with a zig-zag winding configuration around a core with multiple legs, integrating harmonics reduction and current unbalance cancellation functions, eliminating the need for separate devices by efficiently reducing harmonics and unbalance while minimizing transformer volume and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices (K-factor transformer, harmonics reduction device, current unbalance compensation device) are installed to reduce damage caused by harmonics and current unbalance, then the harmonics reduction function and current unbalance compensation function are improved, but the device complexity and investment costs increase
Solution Approach 1:
The patent combines the harmonics reduction function and current unbalance compensation function into a single hybrid transformer device. The transformer includes a primary coil, secondary coil, and core with specific winding configurations that simultaneously achieve both functions, eliminating the need for separate K-factor transformer, harmonics reduction device, and current unbalance compensation device
Solution Approach 2:
The hybrid transformer is designed as a multi-functional device that performs transformation function, harmonics reduction, and current unbalance compensation all in one unit. The transformer can handle both balanced and unbalanced loads while reducing harmonics, making it a universal solution for power quality issues
2Reliability
If separate devices (K-factor transformer, harmonics reduction device, current unbalance compensation device) are installed to reduce damage caused by harmonics and current unbalance, then the harmonics reduction function and current unbalance compensation function are improved, but the investment costs increase
Solution Approach 1:
The patent combines the harmonics reduction function and current unbalance compensation function into a single hybrid transformer device. The transformer includes a primary coil, secondary coil, and core with specific winding configurations that simultaneously achieve both functions, eliminating the need for separate K-factor transformer, harmonics reduction device, and current unbalance compensation device
Solution Approach 2:
The hybrid transformer is designed as a multi-functional device that performs transformation function, harmonics reduction, and current unbalance compensation all in one unit. The transformer can handle both balanced and unbalanced loads while reducing harmonics, making it a universal solution for power quality issues
3Reliability
If separate devices (K-factor transformer, harmonics reduction device, current unbalance compensation device) are installed to reduce damage caused by harmonics and current unbalance, then the harmonics reduction function and current unbalance compensation function are improved, but the installation space requirements increase
Solution Approach 1:
The patent combines the harmonics reduction function and current unbalance compensation function into a single hybrid transformer device. The transformer includes a primary coil, secondary coil, and core with specific winding configurations that simultaneously achieve both functions, eliminating the need for separate K-factor transformer, harmonics reduction device, and current unbalance compensation device
4Ease of manufacture
If traditional transformer winding configuration is used, then the manufacturing simplicity is maintained, but the harmonics reduction and current unbalance compensation functions are insufficient
Solution Approach 1:
The patent applies specific winding configurations to specific parts of the transformer. The secondary coil windings are connected in a zig-zag pattern around the core legs, with specific connections between windings on different legs. This localized structural differentiation enables harmonics reduction and current unbalance compensation while maintaining overall manufacturing feasibility
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 hybrid transformer effectively reduces harmonics and cancels current unbalance, saving investment costs and power losses, with a more efficient structure that simplifies manufacturing and maintains transformer performance.
Implementation Method 1
electrical transformers are devices that are connected in series to a transmission and distribution system to transform alternating voltage or current from one level to another using a electromagnetic induction phenomenon
Implementation Method 2
two types of windings selected from the group consisting of the first winding, the second winding and the third winding of the secondary coil are wound alternately around the first leg, the second leg and the third leg, respectively, in such a fashion as to be wound in an overlapping manner around the core in the winding order
Data Source
AI summary
The present invention provides a hybrid transformer. In a transformer comprising a primary core and a secondary coil, the hybrid transformer includes a core with a 1st leg, a 2nd leg, and a 3rd leg; and a secondary coil with a 1st winding, a 2nd winding and a 3rd winding, which are wound zigzag on said 1st leg, said 2nd leg, and said 3rd leg. Two types of windings selected from the group consisting of said 1st winding, said 2nd winding and said 3rd winding are wound alternatively on said 1st leg, said 2nd leg, and said 3rd leg, respectively. However, the two types of windings wound on said 1st leg, said 2nd leg, and said 3rd leg, respectively, are wound in an overlapping manner around said core in the winding order.