Inverter DC-AC Sample Clauses

Inverter DC-AC. Inverters are DC-AC converters, which use switching devices (IGBT’s) to create a pulse width modulated (PMW) output signal. The fundamental frequency of the PWM signal equals the AC systems frequency. For some applications, a PWM power signal can be used. However, there are also applications, which require a nearly perfect sine function. In this case the PWM signal will be filtered. The output power of the inverter can be given as: In this equation, Pout is the output power, Pin equals the input power, Psl equals semiconductor resistance losses, Psw equals the switching losses and Pf equals the losses in the filter. The semiconductor resistance and the losses in the filter depend on the current; the switching losses depend on the switching frequency. A higher switching frequency results in higher losses. Figure 46 shows a schematic of a two level, three-phase inverter. SA DA SB DB SC DC SA' DA' SB' DB' SC' DC' vAB vBC A iA B iB vCA C iC vAN vBN vCN Vi N Figure 46: Schematic of a two level three-phase inverter Figure 47 shows the GES model block of a three-phase inverter. Figure 47: The GES model block of a three-phase inverter Table 28 shows the input and output parameters need for the DC-AC three-phase inverter model block. Type Name Gates Parameter s INV_DC_A C 2 5 INOMAN. Hel Electric components Version 1 p Created Fuel type 0 IMTECH 314 SWBS 4 31-10-2013 gate # Index Power [In,Out] effort cal uni t flow cal unit paramete r # name valu e unit fun [kW 0 0 In ui [V] ii c [A] 0 nominal power 550 ]
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