Photovoltaic Inverter Transformer for Integrated Signal Transmission
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Solution Overview
Problem
Conventional photovoltaic inverters have dispersed communication and arc detection circuits that occupy large space, increase design costs, and have poor adaptability, leading to potential power supply safety issues due to noise signals and arc faults.
Innovation Solution
Integrating a communication circuit and an arc detection circuit within a photovoltaic inverter using a transformer with a magnetic core, primary-side and secondary-side coils, allowing for centralized signal transmission and detection, with distinct frequencies to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If communication circuit and arc detection circuit are dispersedly disposed, then signal detection and communication functions are achieved, but device space occupation increases and design costs increase
Solution Approach 1:
The patent combines the communication circuit and arc detection circuit into a single integrated module on the inverter circuit board. The communication circuit includes a communication processor and communication interface, while the arc detection circuit includes an arc detection processor and detection interface. Both circuits share common components such as crystal oscillators, capacitors, and the circuit board space, thereby reducing overall space occupation while maintaining independent functionality of both communication and arc detection operations.
2Ease of manufacture
If communication circuit and arc detection circuit are dispersedly disposed, then independent circuit design is achieved, but design costs increase and adaptability decreases
Solution Approach 1:
The integrated circuit module is designed to perform multiple functions simultaneously. The communication processor can handle both data communication and arc detection signal processing, while the detection interface serves dual purposes for both communication protocols and arc fault detection. This multi-functional design reduces the number of separate circuits needed, simplifying overall device configuration while maintaining ease of manufacture through standardized integrated module production.
3Device complexity
If transformer includes only one secondary-side coil, then structure is simple, but both power line communication and arc detection cannot be implemented simultaneously
Solution Approach 1:
The transformer is divided into multiple independent secondary-side coils, with each coil dedicated to a specific function. The first secondary-side coil is configured for power line communication signals, while the second secondary-side coil is configured for arc detection signals. This segmentation allows each coil to be optimized for its specific function, enabling simultaneous operation of both communication and arc detection without mutual interference, while maintaining a relatively simple overall transformer structure.
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
Reduces space and design costs while enhancing power supply safety, improving integration and adaptability by minimizing signal interference and increasing detection sensitivity.
Implementation Method 1
The transformer may include one magnetic core, at least one primary-side coil, and at least two secondary-side coils. The at least one primary-side coil and the at least two secondary-side coils are wound around the magnetic core.
Data Source
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AI summary
This application provides a photovoltaic inverter and a control method thereof. The photovoltaic inverter includes an inverter circuit, a communication circuit, an arc detection circuit, and a transformer. The transformer includes one magnetic core, at least one primary-side coil, and at least two secondary-side coils. The primary-side coil and the secondary-side coils of the transformer are wound around the magnetic core. One end of a first primary-side coil of the transformer is configured to connect to a power supply, the other end of the first primary-side coil is configured to connect to an input end of the inverter circuit, a first secondary-side coil of the transformer is configured to connect to the communication circuit, and a second secondary-side coil of the transformer is configured to connect to the arc detection circuit, to implement both power line communication and arc detection on the basis that the transformer includes the magnetic core. According to this application, the communication circuit and the arc detection circuit may be disposed in the inverter in a centralized manner, so that disposing space is reduced while power supply safety is ensured, design costs of the photovoltaic inverter are reduced, a structure is simple, the method is simple, and applicability is strong.