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Analysis of core hysteresis loss in switching transformer: Due to the magnetic coercivity of the transformer core, when the magnetic field repeatedly magnetizes the transformer core, an additional part of the magnetic field energy is always needed to overcome the magnetic coercivity and eliminate the residual magnetic flux. This part of the magnetic field energy used to overcome the magnetic coercivity and eliminate the residual magnetic flux does not enhance the magnetic flux density of the transformer core....; Keywords： Switching transformer core hysteresis
Publish Time：2013-12-23

Switching transformer core hysteresis loop measurement: The hysteresis loss and eddy current loss of the transformer core material are the most important factors that determine the technical performance of the transformer core material. Therefore, it is necessary to measure the hysteresis loop of the transformer core material. By testing the hysteresis loop of the transformer core, it is easy to see the main......; Keywords： Switching transformer core hysteresis
Publish Time：2013-12-23

Analysis of Distributed Capacitance of Switching Transformer: The distributed capacitance of the filter inductor in the switching power supply voltage input circuit has a great influence on the EMC index, so it is also necessary to have a full understanding of the distributed capacitance composition and principle of the filter inductor coil. In principle, the distributed capacitance of the filter inductor coil is basically the same as the distributed capacitance of the switching transformer coil......; Keywords： Switching transformer distributed capacitance
Publish Time：2013-12-23

Detailed explanation on how to handle electromagnetic interference faults: As we all know, shielding, filtering, reasonable grounding, reasonable layout and other measures to suppress interference are very effective and are widely used in engineering practice. You can also use avoidance and diversion techniques, such as spatial orientation separation, frequency division and avoidance, filtering, absorption and bypassing, etc. Sometimes these avoidance and diversion techniques are simple and clever......; Keywords： Electromagnetic Interference
Publish Time：2013-12-23

Summary of Internal Loss Analysis of Single Excitation Transformer: The hysteresis loss of the transformer core is actually part of the energy loss generated in the core by the magnetic field generated by the excitation current flowing through the primary coil of the transformer; however, not all the energy of the excitation current is converted into hysteresis loss, and part of the energy of the excitation current needs to be converted into back electromotive force output. The back electromotive force generated by the primary coil of the transformer......; Keywords： Single-excitation transformer with internal losses
Publish Time：2013-12-23

Improving the efficiency of switching power supply starts with selecting the transformer core: In recent years, the prices of core materials and conductive materials used in electronic transformers in power supplies have continued to rise, and upstream raw materials have formed a seller's market. As downstream power users of electronic transformers, they can choose and purchase globally, forming a buyer's market. The electronic transformer industry, which is in the middle position, can only take the path of technological innovation to......; Keywords： Switching power supply transformer magnetic core
Publish Time：2013-12-23

Measures for restoring the insulation hardness after transformer assembly: Oil treatment Before vacuum oil filling, use an oil filter to treat the oil and submit the oil test report. If two types of oil are mixed, it is recommended to do a mixed oil test, and the oil can be used only after the test is qualified. The general performance analysis of the oil is based on the original data and can no longer be performed on site. However, the following indicators must provide the actual measured data of the oil in each oil tank: a. Breakdown strength......; Keywords： Transformer insulation hardness
Publish Time：2013-12-23

Design volt-second capacity and primary coil turns calculation of double-excitation switching transformer: Calculation of the volt-second capacity and primary coil turns of the dual-excitation switching power supply transformer In Figure 2-7, for the dual-excitation switching power supply transformer, each time an AC pulse voltage is input, except for the first input pulse whose magnetic flux density changes from 0 to the maximum value Bm, the remaining input pulses have a magnetic flux density change range from the negative maximum to the negative maximum....; Keywords： Double-excitation switching transformer
Publish Time：2013-12-23

Diagram of the structure principle of differential transformer: There are two types of transformers: air-gap type and differential transformer. Currently, the solenoid type differential transformer is mostly used. Its basic components include armature, primary coil, secondary coil and coil frame. The primary coil is used as the excitation of the differential transformer, which is equivalent to the primary side of the transformer, while the secondary coil is composed of two coils with the same structure size and parameters connected in series in reverse phase......; Keywords： Differential transformer
Publish Time：2013-12-23

Practical operation method of portable high voltage test transformer: The iron core of the portable high-voltage test transformer is a single-frame type. The coil adopts a co-core cylindrical multi-layer tower structure. The primary low-voltage winding is wound on the iron core, and the secondary high-voltage winding is wound on the outside of the low-voltage winding. This coaxial arrangement reduces the coupling loss between the windings. The high-voltage silicon stack is encapsulated in the casing with a special process, and the shell of the product is made to match the cor...; Keywords： Portable Transformer
Publish Time：2013-12-23

Smart Grid Transformer Maintenance Knowledge Q&A: (001): What are the normal inspection items for transformers? Answer: (1) Is the sound of the transformer normal? (2) Is the oil color and oil level in the oil pillow and oil-filled bushing normal? Is there any oil leakage? (3) Is there any damage to the bushings on each side? Are there any discharge marks or other abnormal phenomena? (4) Is the cooling device operating normally? (5) Is the upper oil......; Keywords： Smart Grid Transformer
Publish Time：2013-12-23

Some thoughts on amorphous power transformers: Since the early 1990s, when the American Allied Signal Company began to seek a way out for their Mat-glass products in my country, more than a dozen domestic power transformer manufacturers have successively launched industrial frequency power transformers (hereinafter referred to as "non-transformers") using iron-based amorphous alloy cores to replace traditional silicon steel......; Keywords： Power Transformer
Publish Time：2013-12-23

Failures and solutions of oil-immersed transformers: With the development of the power industry, how to improve the performance of power equipment and ensure the reliable operation of the power system is an urgent problem to be solved in power production. Therefore, whether the oil leakage problem of transformers can be dealt with in a timely and thorough manner has gradually become an important technical indicator for measuring the development of the power industry. 1 Analysis of the causes of transformer oil leakage......; Keywords： Oil immersed transformer
Publish Time：2013-12-23

Analysis of unbalanced current problem of public distribution transformer: 1. The impact of transformer load imbalance on the system 1.1 Increased line loss When the three-phase load of the distribution transformer is unbalanced, the increase in line loss is manifested in two parts: one is the increase in distribution transformer loss; the other is the increase in line loss. 1.2 Reduce the utilization rate of the transformer and threaten safe operation The rated capacity of the distribution transformer is designed according to each phase winding. When......; Keywords： Transformer unbalanced current
Publish Time：2013-12-22

Basic working principle, structure and rated data of transformer: 　　1. The operating principle of an ideal transformer: · Transformer electromotive force: A coil chain with N turns, when it changes, the magnitude of the induced electromotive force e at both ends of the coil is proportional to N and the direction is determined by Lenz's law. · Lenz's law: In a changing magnetic field, the direction of the induced electromotive force of the coil always makes the current it pushes produce......; Keywords： Transformer working principle structure rated data
Publish Time：2013-12-22

Design of Flyback Transformer: Basic steps: 1. Determine Dmax and Vor. 2. Calculate the turns ratio n. 3. Calculate the primary inductance Lp. 4. Select the magnetic core. 5. Calculate the minimum number of primary turns. 6. The relationship between the number of turns of the primary, secondary and feedback windings. 7. Select the wire diameter and determine the number of turns of the primary, secondary and feedback windings. 8. Make samples and adjust parameters. ......; Keywords： Flyback Transformer
Publish Time：2013-12-22

Design of forward transformer: 本文以一个13.8V 20A的汽车铅酸电池充电器变压器计算过程为例，来说明正激变压器的计算过程1、相關規格参数（SPEC）: INPUT: AC 180V~260V 50Hz OUTPUT: DC 13.8V (Uomax=14.7V) 20A Pout: 274W (Pomax=294 ......; Keywords： Forward Transformer
Publish Time：2013-12-22

The basic principles of transformers, let you start from the basics: Transformers are used in almost all electronic products. The principle is simple, but the winding process of transformers will have different requirements according to different usage occasions (different uses). The main functions of transformers are: voltage conversion; impedance conversion; isolation; voltage stabilization (magnetic saturation transformer), etc. The commonly used iron core shapes of transformers are generally E-type and C-type......; Keywords： Transformer basic principles
Publish Time：2013-12-22

Brief analysis of the hazards caused by partial discharge and the main forms of discharge: If partial discharge occurs in the transformer, it is very likely to cause premature damage to the transformer, affecting the service life of the transformer. At the same time, partial discharge also directly affects the normal power supply in the area. Therefore, the detection of partial discharge of transformers is an important measure to ensure the safe and reliable operation of the equipment. This article discusses the partial discharge of power transformers......; Keywords： Partial Discharge
Publish Time：2013-12-22

Design of fire control system positioning function based on rotary transformer signal generation circuit: The main function of the rotation signal processing circuit module is to use the shaft angle position measurement element - the rotary transformer, control the sine wave signal with a frequency of 400 Hz, and make the phase angle correspond to the specific voltage value through demodulation processing, generate two signals with a phase difference of 90°, and send them to the system main control computer to calculate the position of the loading system, and......; Keywords： Resolver circuit design
Publish Time：2013-12-22

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