Laboratory power supply, what is it and how to buy it?

November 2, 2021

Power supplies are devices designed for the industrial area, laboratories and telecommunications. These have adjustable or fixed current or voltage outputs, thanks to this capacity the energy can be limited or increased so as to avoid interruptions in the test circuits.

The source in turn has a rotary potentiometer that regulates these parameters with a double function; This refers to the fact that it has a finer or thinner adjustment and another thicker or wider, in this way it is easier to adjust or regulate the precision of the current and voltage in the power supplies. Power supplies made specifically for laboratories also have a third preset setting, with this alternative you can easily retrieve frequently used current and voltage values ​​by just pressing a few buttons.

Main Features of the Laboratory Power Supply

Power supplies used in laboratories have certain distinctive characteristics that are worth pointing out and clarifying in order to better understand how they work and how they are used.

The first feature that distinguishes them are 3 different types of regulatory adjustments , while the others only have the slim fit and the wide fit. The laboratory power supply also has a preset option , as already mentioned, which makes it one of the most useful tools when it comes to electrical circuits .

On the other hand, they are also practical because of the way they are presented, that is, the way they are made makes them an excellent laboratory instrument; This is due to the fact that they are small and, thanks to this, they do not pose a problem when deciding the best place to place it, in addition to the fact that, thanks to their design, they are light and easy to handle and transport.

Power supplies are mainly intended to be used for regulation and control of electricity and energy, that is, they are used in the electronics sector as an indispensable tool and applicable in a considerable amount of tests.

Types of laboratory power supplies

There are two types of laboratory power supplies; One can talk about adjustable power supplies and switchable power supplies. The first has larger dimensions and therefore both have different specifications regarding their characteristics, but to be clear about their differences, these are the two classes of power supplies:

  • Adjustable power supplies. These have large transformers and equal voltage regulators; They are also made up of a filter and a rectifier. Thanks to their complex structure, they are considered to have a yield of just 50%. Due to their larger dimensions, these power supplies are used less frequently and only for specific applications. One of the disadvantages of these sources is that in general the no-load voltage tends to have higher energy than the nominal voltage.
  • Nominal power supply. This type of power supply is much more recommended than those with large transformers due to its more compact and lightweight design that is more practical in every way. They usually contain built-in network adapters and computer adapters. This type of source is considered more innovative and useful than conventional sources, all because they have a much more stable system and can be used as tabletop sources without complications.

Parts of a laboratory power supply

In general, it has four specific parts that allow its optimal operation, these are the regulator, the transformer, the filter and the rectifier. Each of these parts have different functions that allow the power supply to work.

The transformers are the main part of a power supply and thanks to them source can work with stability. It is recommended that isolating transformers be used since it has two electrically separated decants and allows for the slim fit and the wide fit without inconvenience. On the other hand there are auto-transformers, which do not have the same efficiency and therefore are not advisable.

Then there is the rectifier, this is in charge of rectifying the type of voltage that you want to obtain, that is, the rectifier is in charge of complying with the transformer settings, causing the power supply to work in an ideal way. It is recommended to use diodes suitable for the type of voltage to be generated (Example: for a simple secondary voltage of 40 watts, an 80 watt diode must be used).

The filter, also called an electrolytic capacitor, works mainly with the current from the source and allows it to flow correctly. The filter works with current just like the rectifier does with voltage.

Finally, there is the regulator, which allows the power supply not to overload or exceed the voltage or current levels that may be required; This makes the regulator a fundamental part of the power supplies as it prevents damage and that it may break down unexpectedly.

Advantages and disadvantages

Firstly, the advantages of these devices so widely used in the laboratory area should be discussed; The main thing is its ease of giving it a specific space where you can work with it, thanks to its compact and practical size. In addition to this, they allow efficient and hassle-free testing.

Another advantage of power supplies is the quality with which it is manufactured and its interior designed in an effective way that allows it to achieve ideal operation.

On the other hand, with regard to the disadvantages, the most notable thing is a bad handling that ends in a failed result, that is, the only thing that can be a disadvantage about power supplies is when it is not used correctly and therefore ends without providing the expected results.

Power supplies are an excellent tool to be used in laboratories, they allow working with electrical voltages and currents without complications and in a practical way, thanks to this, they become an instrument that is essential for those who work with electrical circuits and require an efficient way. to carry out their internships.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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