Omron SYSDRIVE 3G3MV SERIES User Manual

2-30
The following frequencies are harmonics of a 60- or 50-Hz commercial power supply.
Second harmonic: 120 (100) Hz
Third harmonic: 180 (150) Hz
Second harmonic (120 Hz)
Basic frequency (60 Hz)
Third harmonic (180 Hz)
Problems Caused by Harmonics Generation
The waveform of the commercial power supply will be distorted if the commercial power supply contains
excessive harmonics. Machines with such a commercial power supply will malfunction or generate
excessive heat.
Basic frequency (60 Hz) Third harmonic (180 Hz)
Distorted current wave
form
D Causes of Harmonics Generation
• Usually, electric machines have built-in circuitry that converts commercial AC power supply into DC
power.
Such AC power, however, contains harmonics due to the difference in current flow between DC and
AC.
Obtaining DC from AC Using Rectifiers and Capacitors
DC voltage is obtained by converting AC voltage into a pulsating one-side voltage with rectifiers and
smoothing the pulsating one-side voltage with capacitors. Such AC current, however, contains harmon-
ics.
Design Chapter 2

Omron SYSDRIVE 3G3MV SERIES Specifications

General

Model	SYSDRIVE 3G3MV SERIES
Category	Inverter
Input Frequency	50/60 Hz
Output Frequency	0.1 to 400 Hz
Cooling Method	Forced Air Cooling
Input Voltage	200 to 240 VAC, 380 to 480 VAC
Horsepower Range	0.1 to 15 HP
Power Range	0.1 to 11 kW
Overload Capacity	150% for 60 seconds
Braking Unit	Built-in
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Overheat
Communication	RS-485
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 65°C
Humidity	5 to 95% RH (non-condensing)
Vibration	5.9 m/s² or less
Voltage Class	200V, 400V