How does a three-phase autotransformer work?
What is a three-phase autotransformer work?
A transformer is used to increase/decrease or increase voltages in an electric circuit using the principle of electromagnetic induction. This comes useful when the supply voltage or line voltage available to you does not match the input voltage requirements of the device you want to operate.
Regular transformers have two coils – primary and secondary.
The three-phase auto-transformer has a single coil that acts both as the primary and secondary coil. They are used for starting induction motors, in audio systems, in power transmission and distribution, and even in railways.
What is working principle?
The working principle of the autotransformer is that when a coil is connected to an AC power supply (the primary coil), an alternating current flows through the coil. This alternating current generates an alternating magnetic field in the iron core. The alternating main magnetic flux generates its own induced electromotive force in the primary coil, while the other coil (the secondary coil) induces the mutual inductance electromotive force. By changing the relationship between the turns ratio of the primary and secondary coils, the terminal voltages of the primary and secondary coils are changed to realize the voltage conversion.
The autotransformer has only one winding. When it is used as a step-down transformer, part of the wire turns are drawn from the winding as the secondary winding; When used as a step-up transformer, the applied voltage is only applied to a part of the wire turns of the winding. Generally, the part of the winding that belongs to both the primary and secondary windings is called the common winding, and the rest of the autotransformer is called the series winding. Compared with the ordinary transformer, the autotransformer with the same capacity is not only small in size, but also high in efficiency. The larger the transformer capacity, the higher the voltage.
This advantage is even more prominent. Therefore, with the development of power system, the improvement of voltage level and the increase of transmission capacity, autotransformers are widely used because of their large capacity, low loss and low cost.
three-phase autotransformer Features
Three-phase autotransformer is a kind of common power transforme and widely used in power transmission and distribution system. It has the following notable features.
First, the three-phase autotransformer has strong adaptability and reliability. It can adapt to different power load conditions and provide reliable power supply. At the same time, the auto-transformer has the advantages of simple structure, low maintenance cost, high reliability and long-term stable operation.
Second, three-phase autotransformers have lower noise and vibration levels. Due to its special design, the noise and vibration generated by the autotransformer during operation are small, which can reduce the interference to the surrounding environment and equipment and improve the comfort of the working environment.
Third, the three-phase autotransformer has the characteristics of smaller volume and portability. Compared to other types of transformers, three-phase autotransformers are smaller in size and lighter in weight, so they are more convenient during installation and maintenance. This is ideal for place where space is limited or where frequent moving is required.
Fourth, the three-phase autotransformer has a high efficiency. The autotransformer structure can reduce the loss of the iron core and the loss of the resistance, so as to improve the energy transmission efficiency of the transformer. This is particularly important for the operation of the power system can reduce energy consumption and economic costs.
three-phase autotransformer Application
Three-phase autotransformer can be mainly used in the following aspects:
·Power transmission and distribution
·Audio system
·Railways
·Autotransformer starter
If you are looking for three-phase autotransformers, please contact Ztelectransformer for detailed product information and quotations.
A transformer is used to increase/decrease or increase voltages in an electric circuit using the principle of electromagnetic induction. This comes useful when the supply voltage or line voltage available to you does not match the input voltage requirements of the device you want to operate.
Regular transformers have two coils – primary and secondary.
The three-phase auto-transformer has a single coil that acts both as the primary and secondary coil. They are used for starting induction motors, in audio systems, in power transmission and distribution, and even in railways.
What is working principle?
The working principle of the autotransformer is that when a coil is connected to an AC power supply (the primary coil), an alternating current flows through the coil. This alternating current generates an alternating magnetic field in the iron core. The alternating main magnetic flux generates its own induced electromotive force in the primary coil, while the other coil (the secondary coil) induces the mutual inductance electromotive force. By changing the relationship between the turns ratio of the primary and secondary coils, the terminal voltages of the primary and secondary coils are changed to realize the voltage conversion.
The autotransformer has only one winding. When it is used as a step-down transformer, part of the wire turns are drawn from the winding as the secondary winding; When used as a step-up transformer, the applied voltage is only applied to a part of the wire turns of the winding. Generally, the part of the winding that belongs to both the primary and secondary windings is called the common winding, and the rest of the autotransformer is called the series winding. Compared with the ordinary transformer, the autotransformer with the same capacity is not only small in size, but also high in efficiency. The larger the transformer capacity, the higher the voltage.
This advantage is even more prominent. Therefore, with the development of power system, the improvement of voltage level and the increase of transmission capacity, autotransformers are widely used because of their large capacity, low loss and low cost.
three-phase autotransformer Features
Three-phase autotransformer is a kind of common power transforme and widely used in power transmission and distribution system. It has the following notable features.
First, the three-phase autotransformer has strong adaptability and reliability. It can adapt to different power load conditions and provide reliable power supply. At the same time, the auto-transformer has the advantages of simple structure, low maintenance cost, high reliability and long-term stable operation.
Second, three-phase autotransformers have lower noise and vibration levels. Due to its special design, the noise and vibration generated by the autotransformer during operation are small, which can reduce the interference to the surrounding environment and equipment and improve the comfort of the working environment.
Third, the three-phase autotransformer has the characteristics of smaller volume and portability. Compared to other types of transformers, three-phase autotransformers are smaller in size and lighter in weight, so they are more convenient during installation and maintenance. This is ideal for place where space is limited or where frequent moving is required.
Fourth, the three-phase autotransformer has a high efficiency. The autotransformer structure can reduce the loss of the iron core and the loss of the resistance, so as to improve the energy transmission efficiency of the transformer. This is particularly important for the operation of the power system can reduce energy consumption and economic costs.
three-phase autotransformer Application
Three-phase autotransformer can be mainly used in the following aspects:
·Power transmission and distribution
·Audio system
·Railways
·Autotransformer starter
If you are looking for three-phase autotransformers, please contact Ztelectransformer for detailed product information and quotations.