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03-14

Influence of China's Entry into WTO on China's Electronic Transformer Industry

Influence of China's Entry into WTO on China's Electronic Transformer Industry
03-14

Eleventh Five-Year Plan for Electronic Transformer Industry

Eleventh Five-Year Plan for Electronic Transformer Industry
03-14

my country's first new 220kV three-phase railway balanced traction transformer was successfully developed

China Economic Net Baoding On January 17, Tianwei Baobian Electric Co., Ltd. (hereinafter referred to as "Tianwei Baobian") independently developed the PQYS-S-63000kVA/220kV three-phase railway balanced traction transformer with completely independent intellectual property rights. Passed the assessment of all test items including the sudden short-circuit test of the National Transformer Testing Center, and the test results fully met the technical specifications for the electrification design of high-speed railways and the requirements of scientific research and trial production, marking the development of my country's first new 220kV three-phase railway balanced traction transformer success.
03-14

Analysis of the advantages and disadvantages of autotransformers

Analysis of the advantages and disadvantages of autotransformers, compared with ordinary double-winding transformers, autotransformers have the following advantages: 1) Less consumption of materials and low cost. Because of the amount of silicon steel sheets and copper wires used in the transformer.
03-14

alternating current vs direct current

Compared with the HVDC transmission mode, the HVDC transmission mode has obvious advantages. Historically, it was only due to technical reasons that AC transmission replaced DC transmission. The main advantages and disadvantages of alternating current and direct current are compared first, so as to explain their respective value in application.
03-14

Transformer Design Details

The design process of the transformer includes five steps: 1. Determine the turns ratio of the primary and secondary sides; 2. Determine the number of turns of the primary and secondary sides; 3. Determine the wire diameter of the winding; 4. Determine the number of wire strands of the winding; 5. Calculate the window area.
03-14

Features of Toroidal Transformers

As the name implies, a transformer with a toroidal core is called a toroidal transformer. Compared with transformers using other types of iron cores, toroidal transformers have the following advantages:
03-14

Analysis of characteristic difference index of transformer winding frequency response fingerprint

Transformer is the key equipment for power transmission and transformation in the power system, and its safe and stable operation is of great significance to ensure the reliability of the power system. After the transformer suffers from a sudden short-circuit in the near area, the winding may be deformed. It is necessary to do a winding deformation test to determine that the transformer is free of faults before it can be put into operation. The detection of transformer winding deformation by frequency response analysis has the advantages of high sensitivity and convenient on-site use, and has been widely used in the power industry. But for a long time, the use of frequency response analysis method to diagnose transformer winding deformation is mainly based on the basis of comparing frequency response fingerprints through experience, lacking in-depth data analysis methods.
03-14

Pay attention to electromagnetic interference caused by power supply

Electromagnetic interference is an unavoidable problem in the design of electronic equipment and systems. The power supply is the part that connects the electronic equipment with the power supply network, so the electromagnetic interference caused by the power supply is an issue that deserves serious attention in the electronic equipment. In fact, electronic equipment is required to reduce the electromagnetic interference (EMI) of the power supply to the specified limits and maintain the electromagnetic compatibility (EMC). Ignoring this requirement will make it impossible for electronic equipment to pass mandatory standard tests and delay the time when electronic equipment is put on the market.
03-14

The price rise of raw materials tests the viability of transformer enterprises

Electronic transformers and inductors are one of the important components of electronic equipment and are widely used in digital cameras, digital TVs, notebook computers, automotive electronics and other fields. Their performance and level directly affect the quality of electronic equipment. Since the beginning of this year, the rise in raw material prices has seriously threatened the development of the transformer industry. According to industry insiders, if domestic transformer companies do not adjust their market strategies in a timely manner, increase new product development efforts, and strive to reduce costs, it will be difficult for some companies to pass this hurdle.
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