Yamaha Generator Inverter System - Yamaha EF4500iSE Theory & Diagnostics Manual

Yamaha Generator Inverter System

The control unit and multi-pole alternator cooperate to generate AC output. The inverter, controlled by a 16-bit
microcomputer, is a Pulse Width Modulation (PWM) sine wave inverter.
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 a sine wave with a distortion ratio of less than 2.5%, equivalent to household
electricity.
PRINCIPLES OF POWER GENERATION WITH AN INVERTER PORTABLE GENERATOR
Synchronous Generator — Theory & Troubleshooting
*
*An alternator that uses highly efficient ferrite magnets generates three-phase AC.
• 120V Model: AC 135 to 225V, 300 to 550 Hz
• 230V Model: AC 260 to 488V, 300 to 550Hz
Condenser Winding Sine Wave
CONVENTIONAL SINE WAVE
Control unit
1-5
Condenser Winding Sine Wave
Inverter Sine Wave
INVERTER SINE WAVE
Section