The principle of an isolation transformer is the same as that of an ordinary transformer. All use electromagnetic induction. An isolation transformer generally refers to a 1:1 transformer. Because the secondary is not connected to earth. There is no potential difference between any secondary line and ground. Use safety. Often used as a power source for maintenance.
Isolation transformers are not all 1:1 transformers. Power supplies for controlling transformers and tube equipment are also isolation transformers. Power supplies such as tube amplifiers, tube radios, and oscilloscopes and lathe control transformers are isolation transformers. For example, a 1 to 1 isolation transformer is commonly used for the maintenance of color TVs. Isolation transformers are used more often and are also used in air conditioners.
Although there is an isolation circuit between the primary and secondary windings of the transformer, the capacitance between the two windings can still cause static interference between the two circuits at high frequencies. To avoid this interference, the primary and secondary windings of the isolation transformer are generally placed on different stems to reduce the capacitance between the two; the primary and secondary windings are also placed concentrically, but added between the windings. Electrostatic shielding for high anti-interference properties.
Electrostatic shielding is to set a piece of non-closed copper or non-magnetic conductive paper between the original and secondary windings, which is called shielding layer. Copper or non-magnetic conductive paper is connected to the housing with wires. Sometimes, in order to obtain better shielding effect, a shielded enclosure is also covered in the entire transformer. The winding lead terminals are also shielded to prevent other external electromagnetic interference. In this way, the primary and secondary windings can only have magnetic coupling, and the equivalent distributed capacitance between them can be less than 0.01pF, thereby greatly reducing the capacitance current between the primary and secondary windings, effectively suppressing the power supply and other circuits. Various kinds of interference.
Isolation transformers are not all 1:1 transformers. Power supplies for controlling transformers and tube equipment are also isolation transformers. Power supplies such as tube amplifiers, tube radios, and oscilloscopes and lathe control transformers are isolation transformers. For example, a 1 to 1 isolation transformer is commonly used for the maintenance of color TVs. Isolation transformers are used more often and are also used in air conditioners.
Although there is an isolation circuit between the primary and secondary windings of the transformer, the capacitance between the two windings can still cause static interference between the two circuits at high frequencies. To avoid this interference, the primary and secondary windings of the isolation transformer are generally placed on different stems to reduce the capacitance between the two; the primary and secondary windings are also placed concentrically, but added between the windings. Electrostatic shielding for high anti-interference properties.
Electrostatic shielding is to set a piece of non-closed copper or non-magnetic conductive paper between the original and secondary windings, which is called shielding layer. Copper or non-magnetic conductive paper is connected to the housing with wires. Sometimes, in order to obtain better shielding effect, a shielded enclosure is also covered in the entire transformer. The winding lead terminals are also shielded to prevent other external electromagnetic interference. In this way, the primary and secondary windings can only have magnetic coupling, and the equivalent distributed capacitance between them can be less than 0.01pF, thereby greatly reducing the capacitance current between the primary and secondary windings, effectively suppressing the power supply and other circuits. Various kinds of interference.
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