What does transformer mean?
A transformer is an electrical device that uses the principle of electromagnetic induction to change AC voltage. It is widely used in power systems, electronic equipment and industrial fields. It increases or decreases the voltage through the turns ratio of the primary coil and the secondary coil. It is one of the core components of modern power transmission and distribution.
The following is a compilation of hot topics related to transformers in the hot topics on the Internet in the past 10 days:
| Date | hot topics | Main content |
|---|---|---|
| 2023-10-25 | New solid-state transformer technology breakthrough | A U.S. laboratory announced the development of a high-efficiency solid-state transformer, reducing its size by 50% and reducing energy loss by 30%. |
| 2023-10-23 | Global transformer shortage crisis | Due to rising raw material prices and supply chain issues, power projects in many countries have been delayed due to transformer shortages |
| 2023-10-20 | China's UHV transformer export growth | In the first three quarters of 2023, China's UHV transformer exports increased by 45% year-on-year, mainly to countries along the Belt and Road |
| 2023-10-18 | Transformer fire accident draws attention | A fire in a transformer in a certain city's substation caused widespread power outages. Experts called for strengthening inspections of old equipment. |
Basic working principle of transformer
The working principle of the transformer is based on Faraday's law of electromagnetic induction and mainly consists of the following three parts:
| components | Function |
|---|---|
| iron core | Provides a magnetic circuit to enhance magnetic coupling between coils |
| primary coil | Connect the input voltage to generate an alternating magnetic field |
| secondary coil | Generating output voltage through electromagnetic induction |
The voltage transformation follows the formula: V1/V2=N1/N2, where V is the voltage and N is the number of coil turns.
Main types of transformers
Transformers can be divided into the following categories based on their purpose and structure:
| Type | Features | Application scenarios |
|---|---|---|
| power transformer | Large capacity, high voltage level | Power plants and substations |
| Distribution transformer | Small and medium capacity, medium and low pressure | Commercial buildings, residential areas |
| Special transformer | Specially designed to meet specific needs | Electric furnace, rectifier equipment |
| Electronic transformer | Miniaturization, high frequency | Power adapter, electronic equipment |
Transformer technology development trends
The current development of transformer technology shows the following trends:
1.Intelligent: Integrate sensors and communication modules to achieve remote monitoring and fault warning
2.High efficiency and energy saving: Using new materials such as amorphous alloy to reduce no-load loss
3.Environmentally friendly: Use biodegradable insulating oil instead of traditional mineral oil
4.Modular design: Easy to transport and install quickly, shortening the project construction cycle
Things to note when purchasing a transformer
Here are some key factors to consider when selecting a transformer:
| Considerations | Description |
|---|---|
| Rated capacity | Select according to load requirements and reserve appropriate margin. |
| Voltage level | Match input and output voltage requirements |
| Insulation level | Select according to the ambient temperature of use |
| Cooling method | Oil-immersed or dry, depending on installation location |
| Energy efficiency level | Prioritize high-efficiency products to reduce long-term operating costs |
With the development of renewable energy and smart grids, transformer technology will continue to innovate and play an even more critical role in the energy transition. Understanding the basic principles and application scenarios of transformers will help to better grasp the development trends of the power industry.
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