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By Vodovozov V.

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Larger industrial applications require three-phase ac. Lowsignal half wave inverters pass the electrical energy during one alternation. These inverters are used when the power of the load is 100 – 200W. Offline and online inverters. The second classification refers to offline inverting and online inverting. If the only source of the load ac line is the inverter, the inverter is called an offline inverter or autonomous inverter. Some popular offline inverters have the same topology as the controlled rectifiers discussed above.

When regeneration occurs, the roles of the switch and diode reverse. The diode now returns the regenerated power to the dc supply while the switch carries the reactive voltage. + T1 T2 Ud Uout T3 T4 – Fig. 6 With the block control, the two transistors in each leg may be switched in such a way that when one of them is in its off state, the other is on (Fig. 7,a). Therefore, the two switches are nether on simultaneously. In practice, they are both off for a short time interval, known as a blanking time, to avoid short-circuiting of the dc input.

If the only source of the load ac line is the inverter, the inverter is called an offline inverter or autonomous inverter. Some popular offline inverters have the same topology as the controlled rectifiers discussed above. On the other hand, if the inverter is the part of the common power line supplies, the inverter is called an online inverter or a line-fed inverter. 32 Voltage source and current source inverters. In accordance with the circuit electromagnetic processes, voltage source inverters and current source inverters are distinguished.

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