Fluctuations in the power supply can trouble tools that deal with electricity. The input voltage can change up and down depending on the load, the conditions of the supply, and the availability of the electric networks. In the cases of instruments that demand a reliable source of alternating current, the various changes will alter their quality of functioning. To address this issue, a Constant Voltage Transformer is designed. A constant voltage transformer is defined as a type of transformer that operates through the implementation of a ferro-resonant magnetic design, which keeps the output voltage steady no matter the changes in the input voltage.
How Does a Constant Voltage Transformer Work?
While a regular transformer only changes voltage, the constant voltage transformer (CVT) ensures constant voltage is delivered to the load. The crucial difference of the constant voltage transformer lies in the magnetic construction.
A capacitor and a specially designed transformer core are the construction features of a CVT. The operation of the transformer is based on the use of the controlled saturation zone that builds the ferro resonant circuit, allowing it to maintain a stable output voltage despite the input voltage fluctuations.
What Makes a CVT Different From Other Transformers
Voltage Regulation Without Mechanical Adjustment
Its voltage regulation occurs due to the effect of the magnetic core on the resonating capacitor. Thus, there are no moving elements in the regulation process, which means that no mechanical devices like brushes or tap-changing devices are being used.
Fast Response to Voltage Changes
Since voltage regulation is achieved by means of magnetic devices, it is not required to move anything in order to enhance voltage, which means that the response to voltage changes is very quick.
This is a very important factor for any equipment that cannot stand fluctuations in voltage or frequent interruptions of its work.
Isolation and Power Conditioning
In spite of being a transformer, the CVT still has the principle of magnetic coupling as far as the main and secondary windings perform their functions independently. Considering its design, it can function as isolation together with voltage regulation. The ferroresonance makes the CVT able to filter the electrical disturbances introduced by some kinds of equipment and ensure a higher-quality power supply.
Where are Constant Voltage Transformers Used?
CVTs are very valuable for electrical devices where inconsistent voltage can interrupt their performance, cause them to fail to work properly, or generate interruptions in work.
- Medical and laboratory equipment
- Industrial control systems
- CNC and precision machinery
- Instrumentation
- CCTV and security equipment
- Automation systems
- Sensitive electronic equipment
Conclusion
A Constant Voltage Transformer works in accordance with the following principle: it controls the voltage provided to the machinery whenever the supply voltage is unstable. Using the ferro-resonance technology, a CVT can manage the voltage without any mechanical regulation, as well as provide transformer insulation and beneficial power conditioning. Thus, it becomes clear that for sensitive electric devices, a CVT can replace any transformer in the proper circumstances. Servokon is a manufacturer of modern constant voltage transformers. We supply it for a broad range of power conditioning applications.
