Friday, 14 September 2018

Benefits Of A High Voltage Contactor

By Robert Hughes


When it comes to semiconductor technology, remarkable developments have been made. These developments have led to efficiency in switches and overall running if electronic devices. Solid state switches were built to replace thyratrons and spark gaps. Also use of TTL input has become common and it makes it easy to use switches. There are important factors that should be noted when it comes to a high voltage contactor.

The switches have been developed in a way that there is very low input power loss. Power losses have been a major cause for concern when developing switches. These switches are developed with MOSFET technology. This technology involves the use of small total gate charge. This means that losses due to the gate charge, switching frequency, and the drive voltage are very minimal. This is not the case when switches use bipolar transistors such as BJT.

They are reliable for current applications. They offer steady hard saturation even at short-circuit operation. The ability to switch faster enabling them to use smaller inductors in switch mode supplies. This increases overall efficiency. This reliability makes it possible to use these contactors in medical test equipment.

These contactors can be customized in a number of ways to suit where they are being used. The customization is mostly done with the housing and the footprint. Another area that customization can be done is sensitivity. These innovations help the switches to run effectively with the equipment.

The switches have been designed to prevent cases of overload or voltage reversal. Voltage reversals have been causing adverse effects which makes them safe for use anywhere. The technologies used in these contactors reduce risks that come with handling the current.

These switches are able to handle high loads without heating. Heating has been the main concern with fuses. They are voltage controlled and do not use a lot of currents. Other models require more current to switch which leads to increases in heating especially when handling high loads. Now, the drain current does not affect the voltage at the source gate. This ensures that switches never operate linearly.

These type of switches ensures that there is a faster switching. This is made possible because the switches are able to handle high frequencies. The faster switching also does not leave a chance for much loss. The transistors are insulated with a thin oxide layer which prevents drawing of current during switching. This advantage has a lot of effect on the overall performance of the contactors and the power losses.

These power contactors are effectively used with both high and low power equipment. The few discussed features have been the reasons why they have become common. The factors mentioned above are very important and make considerable impacts on the performance of any equipment.




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