Yamaha EF4500iSE - Inverter Generator, Theory & Diagnostics Manual

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Yamaha Generator Theory & Diagnostics Guide
AC OUTPUTS
There are two levels of output available from Yamaha
generators:
1.
Peak Output
(short period of time).
2.
Rated Output
(continuous duty).
In normal operation of course, these levels would
merge. The built-in Thermal or Nonfuse Breakers
(NFB) are designed to protect against harmful over-
loads, while allowing for these different levels. The
length of time the breaker allows the generator to
produce a particular level without interrupting the
current flow varies. This flexibility permits the gen-
erator to be used for a wide variety of applications:
1. The stated
peak output
is the amount of cur-
rent that can be utilized for short time periods
before the NFB disconnects the output. This
output level allows for jobs of short duration,
requiring maximum output (tool startup).
2. The
rated output
is the amount of current the
generator can supply for continuous operation.
12 Volt DC Output
The DC output is intended only to charge a 12-volt
battery. If any 12-volt devices should be connected
to a 12V battery and never to the 12V plug on the
generator. It is possible that a device could be dam-
aged if it is connected directly to a generator.
The DC output is controlled only by the capability,
condition, and state of charge of the battery.
Voltage and Frequency Standards
In the U.S., standard commercial electricity is deliv-
ered at 110~120 V AC, and 220~240 V AC. The
electrical frequency standard is 60 cycles per sec-
ond (60 Hz).
Multi-pole Alternator Features
Used in Inverter Generators
The combination of ferrite magnets in the rotor and
multi-pole stator provides a compact and high per-
formance alternator.
High-frequency multi-pole alternator features:
16-pole rotor
24-pole stator coil
3-phase AC power generation
Exhaust pipe
Engine
Alternator
Muffler
Fuel tank
Control unit
Recoil starter
Battery
EF3000iSE/EF3000iSEB
Control unit
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EF3000iSE new model guide 3/14/03 4:20 PM Page 2
EF3000iSE/EF3000iSEB
CONTROL UNIT
Reference information:
Ferrite magnets are magnetically stable and have a
strong coercive force and so do not become demag-
netized. While they have excellent corrosion resis-
tance, they are also brittle due to the way they are
produced.
Great care must be taken when assem-
bling them as jarring or shocks of force can
adversely affect their efficiency and/or cause
breakage .
Control Unit
The control unit is a sealed unit.
Functions:
AC power generation
Electronic governor (throttle control)
Economy control program
Self-protective function
Over current
Over voltage
High temperature