Three Phase Inverter For the FEC 2005 Induction Motor. December 2, 2004 Duke Gray Nathan Brown Quasar Hamirani. What is the Future Energy Challenge?.
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December 2, 2004
(.28)(230 billion kWh)($0.07/kWh) = $4.5 billion/hr.
We chose to go with FQP17N40 MOSFETS.
Qq=Gate charge of high side FET
Icbs(leak)=Bootstrap capacitor leakage current
Vf=Forward voltage drop across bootstrap diode
f=frequency of operation
VLS=Voltage drop across low-side FET
Therefore, a common capacitor value of 1 µF (50V rating) was selected
(0.46)^2/0.05 = 4.232 Watts ~ 5.0 Watts
Thus, the current sensing resistor was rated for 5 watts.
Ton = 656ns, toff = 420ns, fsw = 10kHz
Pswtotal = 9.13W
Rds = 0.27
Pcond-total = 3.24W
>Efficiency 97.5% at full load (ignoring gate drive losses)