Adjustable transformer

Abstract

The invention discloses an adjustable transformer consisting of a shell, an annular voltage adjusting coil and a rotary contact, wherein the annular voltage adjusting coil and the rotary contact are arranged in the shell, a rotary driving motor and a power controller are additionally arranged outside the shell, the rotary contact consists of a rotary shaft, a conductive contact and a connecting arm, the conductive contact is reliably connected with the top end of the rotary shaft through the connecting arm, the tail end of the rotary shaft is reliably connected with the shell through a bearing and is also reliably connected with the rotary driving motor, the annular voltage adjusting coil consists of a primary coil and a secondary coil, an electrical connection area is formed at the contact part between the primary coil and the conductive contact, and a power controller is electrically connected with the rotary driving motor and a load circuit. The adjustable transformer can effectively guarantee that the output voltage of the transformer and the load demand can be adjusted automatically and synchronously in a certain range, the adjustment process is smooth and continuous, the output stability and the output precision of the transformer can be ensured, the working efficiency and the operation safety of the transformer are greatly improved, and an alarm can be given in the abnormal condition of the transformer.

Description

technical field [0001] The invention relates to an adjustable transformer, which belongs to the field of electric equipment. Background technique [0002] At present, in various power conversion equipment, most of them use transformers to convert voltage and current. [0003] The output voltage and current are often adjusted due to different needs of the load. The commonly used method is to adjust the taps of the transformer by changing the taps of the switch. The disadvantage of this method is that the output of the transformer is jumping, with intervals of several volts or even tens of volts, and cannot be adjusted smoothly and continuously, making the output not accurate enough. It affects the working effect to a certain extent. At present, there are also sliding regulating transformers used to overcome the problem of discontinuous and inaccurate output during the voltage regulation process. However, at present, this type of equipment requires manual operation by the...

AI Technical Summary

Problems solved by technology

The commonly used method is to adjust the taps of the transformer by changing the taps of the switch. The disadvantage of this method is that the output of the transformer is jumping, with intervals of several volts or even tens of volts, and cannot be adjusted smoothly and continuously, making the output not accurate enough. It affects the working effect to a certain extent. At present, there are also sliding regulating transformers used to overcome the problem of discontinuous and inaccurate output during the voltage regulation process. However, at present, this type of equipment requires manual operation by the operator during the regulation process, which is labor-intensive and labor-intensive. The safety is relatively low, and it is also very easy to cause voltage regulation and load demand to be out of sync, and the output accuracy is not high.

[0004] At present, some use carbon brush contact-type rotating adjustable self-coupling transformer to adjust the mains to control another transformer as output to achieve the purpose of smooth adjustment of output, but this way the number of components increases, the connection is complicated, and the self-coupling transformer carbon brush is worn out. , It is easy to cause a short circuit between the coils of the voltage regulator, causing a burnout failure, and through electronic control means (such as silicon controlled rectifiers, etc.) to achieve smooth adjustment of the output, but in that way, the circuit is complicated, the cost is increased, and the failure rate is high.

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