The principle of 3-phase isolation transformer
Yixing Xingyi Special Transformer Co., Ltd. is a professional manufacturer of isolation transformers. Yixing Xingyi Special Transformer Factory has been rated as a star enterprise by the provincial and municipal governments for many years. The products are of high quality, reasonable price, and excellent service. , Well received by users, the shopping mall covers the major mining areas in the country, and has a good market reputation.
3-phase isolation transformerhow it works
The 3-phase isolation transformer adopts a 3-phase double-winding structure, which has the characteristics of anti-lightning and anti-interference. Each winding of the primary and secondary sides is divided into 2 coils, and the 2 coils are wound with 2 layers of mutually insulated metal foils. Therefore There is a capacitor C (that is, a capacitive isolation transformer) between the two coils.
The principle of the isolation transformer is almost the same as that of the general transformer, both of which use the principle of electromagnetic induction. The isolation transformer generally refers to a 1:1 transformer, because the secondary is not connected to the ground, and any line of the secondary is connected to the ground. There is no potential difference, it is safe to use, and it is often used as a maintenance power supply.
Isolation transformers are not all 1:1 transformers. The power supply of control transformers and tube equipment is also isolation transformers. Power supplies such as tube amplifiers, tube radios, oscilloscopes and lathe control transformers are all isolation transformers. For example, 1:1 isolation is commonly used for safe maintenance of color TVs. Transformers and isolation transformers are used more often, and they are also used in air conditioners.
Generally, although there is an isolation circuit between the original and secondary windings of the transformer, in the case of high frequency, the capacitance between the two windings will still cause electrostatic disturbance between the two circuits. To prevent this disturbance, the isolation transformer The primary and secondary windings are generally placed on different cores to reduce the capacitance between the two; there are also options where the primary and secondary windings are placed concentrically, but electrostatic shielding is added between the windings to obtain high resistance disturbing.
