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Figure 7. Block Diagram, Elements of DG1 Frequency Inverters
Table 12. Elements of DG1 Frequency Inverters
Item No.
Description
1
Supply L1, L2 L3, PE, input supply voltage U
DG1-32: 230V class, three-phase input connection (3 AC 230V/240V)
DG1-34: 400V class, three-phase input connection (3 AC 400V/480V)
2
Internal interference suppression filter, category C2 to IEC/EN 61800-3
EMC-connection of internal interference suppression filter to PE
3
Rectifier bridge, converts the AC voltage of the electrical network into DC voltage
4
DC link with charging resistor, capacitor and switching mode power supply unit
(SMPS = Switching Mode Power Supply):
DC link voltage U
DC
5
Inverter. The IGBT based inverter converts the DC voltage of the DC link (U
and frequency (f2). Sinusoidal pulse width modulation (PWM) with V/f control can be switched to speed control with slip compensation
6
Motor connection U/T1, V/T2, W/T3 with output voltage U2 (0–100% U
DG1-32: 3.7A to 261A
DG1-34: 2.2A to 261A
100% at an ambient temperature of 122°F (50°C) with an overload capacity of 150% for 60 s every 600 s and a starting current
of 200% for 2 s every 20 s
7
Keypad with control buttons, graphic display, control voltage, control signal terminals, micro-switches, and interface for the
PC interface module (option)
8
Three-phase asynchronous motor, variable speed control of three-phase asynchronous motor for assigned motor shaft power values (P2):
DG1-32: 0.55 kW to 75 kW (230V, 50 Hz) or 0.75 hp to 100 hp (240V, 60 Hz)
DG1-34: 0.75 kW to 150 kW (400V, 50 Hz) or 1 hp to 200 hp (460V, 60 Hz)
9
DC link—chokes, to minimize current harmonics
= U
at 50/60 Hz:
e
LN
with three-phase input connection (3 AC): U
= 1.41 x U
DC
LN
) into a three-phase AC voltage (U2) with variable amplitude
DC
) and output frequency f2 (0–400 Hz) output current (I2):
e
DG1 Series VFD MN040002EN—March 2014 www.eaton.com
Chapter 3—Product Overview
13
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