Yamaha EF4500iSE Theory & Diagnostics Manual page 19

Power Boost Technology
EF3000iSEB is equipped with a DC-DC converter, which supplies supplemental electric current to the inverter
control unit to boost up the generator output by an additional 500 watts for maximum 10 seconds. This feature
is exclusive on the EF3000iSEB.
DC-DC Converter (Power Boost Technology)
The DC-DC converter is an electrical device to step
up DC voltage. The EF3000iSEB DC-DC converter
steps up the battery voltage from 12 volts to 190
volts.
DC-DC converter is automatically activated to
increase generator output when the AC output cur-
rent exceeds 20 amps and the voltage at the con-
denser inside the control unit drops down to below
190 volts.
The power source is a 12-V battery installed in the
generator to operate the starter motor. DC-DC con-
verter works for maximum 10 seconds, only when a
large amount of starting current is needed and
increases maximum output of generator from 3000
VA to 3200 VA temporarily.
Specifications of DC-DC converter
1. DC input
2. DC output
3. Rated DC current
DC-DC converter
12V Battery
DC190V
2.53 A
Control Unit
DC-DC converter
1-15
– 14 –
Generator Information and Theory
Control Unit
– 14 –