An inverter is a power electronic device that can generate any form of current including, for example, an alternating current, from a direct current2,3,4.
A hybrid inverter makes it possible to supply either an alternating current or a direct current from a current source. This is particularly useful with solar panels which provide electricity when it is not always needed and which must then be stored in batteries for example. This direct current must then be converted into alternating current to be used.
A micro-inverter makes it possible, in a small space, to convert direct voltage into alternating current. There are up to 1000 W, or even more, from a voltage of 12 Va, resistant to temperatures of 65°C, cooled by natural air convection and whose efficiency reaches 95.7%5 .
Inverters are based on an H-bridge structure, usually made up of electronic switches such as IGBTs, power transistors or thyristors. By a set of switchings controlled in an appropriate manner (generally a pulse width modulation), the source is modulated in order to obtain an alternating signal of the desired frequency6.
There are different types of inverters:
voltage inverters and current inverters;
stand-alone inverters and non-stand-alone inverters7.
Stand-alone inverters
A stand-alone inverter delivers voltage with either a fixed or user-adjustable frequency7. It does not always need an electrical network to operate; for example, a travel converter that is plugged into the cigarette lighter socket of a car uses the vehicle's 12 V DC to generate 120 or 230 V, alternating at 50 or 60 Hz.
These inverters are used in particular for the television reception in nomadic mode (satellite receiver in a motorhome for example) without a low voltage power supply input (~12 V).
Non-autonomous inverters
A non-autonomous inverter is an all-thyristor rectifier assembly (Graetz bridge) which, in natural switching assisted by the network to which it is connected, allows operation as an inverter (for example by recovering energy during braking periods in electric motors).
At the base of the development of variable speed static drives for direct and alternating current motors, cycloconverters, current inverters for synchronous and asynchronous machines, up to powers of several MW, this type of assembly is gradually supplanted, in favor of IGBT or GTO converters.
An inverter is a power electronic device that can generate any form of current including, for example, an alternating current, from a direct current2,3,4.
A hybrid inverter makes it possible to supply either an alternating current or a direct current from a current source. This is particularly useful with solar panels which provide electricity when it is not always needed and which must then be stored in batteries for example. This direct current must then be converted into alternating current to be used.
A micro-inverter makes it possible, in a small space, to convert direct voltage into alternating current. There are up to 1000 W, or even more, from a voltage of 12 Va, resistant to temperatures of 65°C, cooled by natural air convection and whose efficiency reaches 95.7%5 .
Inverters are based on an H-bridge structure, usually made up of electronic switches such as IGBTs, power transistors or thyristors. By a set of switchings controlled in an appropriate manner (generally a pulse width modulation), the source is modulated in order to obtain an alternating signal of the desired frequency6.
There are different types of inverters:
voltage inverters and current inverters;
stand-alone inverters and non-stand-alone inverters7.
Stand-alone inverters
A stand-alone inverter delivers voltage with either a fixed or user-adjustable frequency7. It does not always need an electrical network to operate; for example, a travel converter that is plugged into the cigarette lighter socket of a car uses the vehicle's 12 V DC to generate 120 or 230 V, alternating at 50 or 60 Hz.
These inverters are used in particular for the television reception in nomadic mode (satellite receiver in a motorhome for example) without a low voltage power supply input (~12 V).
Non-autonomous inverters
A non-autonomous inverter is an all-thyristor rectifier assembly (Graetz bridge) which, in natural switching assisted by the network to which it is connected, allows operation as an inverter (for example by recovering energy during braking periods in electric motors).
At the base of the development of variable speed static drives for direct and alternating current motors, cycloconverters, current inverters for synchronous and asynchronous machines, up to powers of several MW, this type of assembly is gradually supplanted, in favor of IGBT or GTO converters.
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