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FAQ Converter of tension

 

How to choose its converter of tension

A converter (or inverter) makes it possible to transform the produced D.C. current stored in a battery or product by a generator of current (photovoltaic solar panels, wind mill, hydro-turbine), in alternative course which can then be used or reinjected on the electric distribution network. That makes it possible to standardize produced solar electricity.

 

How to determine the power of the converter (or inverter)?

If the installation uses apparatuses functioning in alternative course (AC), it is then necessary to convert the D.C. current which the generator (e.g. solar panels) produces, in alternative course compatible and usable by these apparatuses.
Since the number of apparatuses becomes important, it is advantageous to choose a converter (or inverter) powerful. The choice of the converter (or inverter) is function of its nominal nominal output, its output (or effectiveness) and of its shape of signal (or of wave).

 

Characteristics of a converter (or inverter)

How to choose the nominal nominal output?

It is necessary to know the total power necessary to the operation of the apparatuses using the alternative course to be able to choose the size and the nominal nominal output of the converter of tension (or inverter); It is advised always to slightly oversize the nominal nominal output of the converter (or inverter) compared to the total power of the apparatuses.

 

Of what does consist the maximum power or power peak?

The majority of the aircraft been driven by an engine (like the electric refrigerators, tools, etc) need a very important current during their starting, equivalent to a very high power, also called power peak. The converter (or inverter) must be able to support this power during this short moment during starting.

 

What means tension of entry?

To choose a tension of entry in D.C. current which can support the tension of the battery and/or that of the generator (e.g. solar panels). This tension corresponds to the tension of the source of food.

 

What means output voltage?

It must correspond to the tension of the apparatuses which will be used (in general 220/230 Volts alternate) and must be regulated to remain stable some is the level of tension in the battery (as long as the battery remains in an acceptable beach of tension)

 

How is the Output expressed?

The output is expressed in % and corresponds to the relationship between the useful output and the absorptive power of the converter. The higher the output is minus the losses will be important and more the apparatus will be regarded as powerful (from this point of view there all at least)

 

Which and the best forms signal (or wave)?

The apparatuses supplied starting from the converter (or inverter) must be able to support the form of the signal (or wave) of exit of the converter (or inverter)
The Councils: Not to place not the converter (or inverter) at the same place as the battery, because the acid fumes released can corrode the electronic elements of the converter; Moreover, the commutation of the converter (or inverter) can, in certain cases, to prove to be dangerous. It is thus, when that is possible, to better air the place which shelters the battery.

 

Which are the types of converter (or inverter)?

Converter (or inverter) with signal (or wave) sinusoidal pure or “pure sine”: It is recommended for all the types of installation because it produces an electric current similar to that of the electric distribution network. However, it generally does not have a system of synchronization network.

Converter (or inverter) with signal (or wave) square: It is inexpensive because the quality of its signal (or wave) is often poor and is used for small loads. Certain apparatuses such as the refrigerator do not function with this kind of converter (or inverter). This kind of converter is less and less used.

Converter (or inverter) with signal (or wave) trapezoidal or “sine modified” or “pseudo sine” or “quasi sine”: It is appropriate for the more share of the apparatuses (lighting, electronics component, engines), and generally presents a quality positive ratio/price

Converter (or inverter) for coupling network: It is indicated for the applications connected to the electric distribution network (injection network), because it produces few harmonics, agrees on the frequency of the network, has an automatic disconnection and measures the maximum point of power (MPPT) of generator (solar panels, wind mills, etc)


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