ELBRIDGE Converter

IGBT (Insulated gate bipolar transistor) converter, with PWM

General description:
D.C. motor converter ELBRIDGE realizes the double conversion AC to DC and DC to DC. Thanks to the method of ñPWMî which modulates the DC energy stored in the capacitor bank (DC-BUS), very high performance can be achieved in terms of dynamics and efficiency.
The advantages of "PWM" technology can be summarized as follows:
- extremely quick dynamic response
- the braking energy recovered and stored into the DC_BUS can be used to feed other drives which share the same DC_BUS feeding with dissipative unit NO NEED and with efficiency increasing.
- Quasi-unitary power factor in any operating condition.
The painstaking care involved to manufacture Marcegaglia ELLETRE products combines in ELBRIDGE sturdiness and reliability with the technological advantages typical of this kind of drives. ELBRIDGE is consequently the ideal tool for the automation of medium and high-power dynamic machines.

ELBRIDGE features:
- double-conversion “H” bridge
- PWM modulation with 8 kHz output frequency
- IGBT Intelligent Power Modules
- ultrafast fuses included
- available rates from 40KW up to 240KW
- instantaneous over-current and overheating protection cut-off integrated in the power modules
- electronic thermal protection
- integrated current loop
- integrated speed loop
- selectable internal or external current sensors

Input:
- Speed and current analogue differential inputs
(range is ± 10 V, ± 10 V and ± 20 mA)
- input for external current feedback
- input for tachogenerator
- 24Vdc opto-insulated digital commands for enabling: speed reference / speed regulator / current reference /current regulator /IGBT power modules / alarms reset
- all parameters can be set up by DIP switches or by 24Vdc
opto-insulated serial input
Outputs:

Outputs:
Converter status is constantly displayed by means of LEDs mounted on the main board:
- minimum speed output
- maximum speed output
- d.c. motor current analogue output
- n.8 24Vdc digital outputs meaning the operating status: half-bridge_1 alarm / half-bridge_1 overheating / half-bridge_2 alarm / half-bridge_2 overheating / minimum speed / maximum speed / current overload / instantaneous over-current