– 2 –
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
Inverter system of EF3000iSE
In the EF3000iSE, the control unit and multi-pole alternator cooperate to generate AC output. The inverter,
controlled by a 16-bit microcomputer, is a PWM sine wave inverter.
* PWM: Pulse Width Modulation
1. The generator’s output frequency remains unchanged even when the engine speed varies.
2. The output voltage is stable.
3. The output waveform is sine wave with distortion ratio of less than 2.5%, equivalent to household elec-
tricity.
Principles of power generation with an inverter portable generator
* An alternator that uses highly efficient ferrite magnets generates three-phase AC.
8
120V model: AC 135 to 255V, 300 to 550Hz
8
230V model: AC 260 to 488V, 300 to 550Hz
Control unit
*
EF3000iSE new model guide 3/14/03 4:20 PM Page 2
