Product category:
DC/AC Inverters
News Release from: ABB | Subject: ACS 600 drives
Edited by the Electronicstalk Editorial
Team on 14 May 2001
AC drives range to new applications
ABB has extended the range of one of the key elements in its ACS 600 drives family, by introducing new IGBT supply unit frame sizes.
ABB has extended the range of one of the key elements in its ACS 600 drives family, by introducing new IGBT supply unit frame sizes These permit operation with many demanding applications and in locations where network conditions are poor
This article was originally published on Electronicstalk on 10 Apr 2001 at 8.00am (UK)
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The power range of the IGBT supply unit now covers 70 to 5000kVA, from 380 to 690V.
This extends the earlier the range, which was from 265 to 5000kVA.
The IGBT supply unit also complements the ACS 611 range of drives, which cover powers down to 11kW.
The supply unit is an essential element of ABB's ACS 600 MultiDrive and is used for input power control.
It is a four-quadrant active rectifier and its main circuit consists of an incoming switch with charging circuit, a filter and a convertor.
The convertor is mechanically and electrically identical to a conventional motor side inverter, but features specially developed software.
The convertor's IGBTs are controlled to keep the DC voltage constant and the line current sinusoidal.
It can boost DC voltage to nominal, thereby allowing motors to give full power even if the line voltage is low.
Among the benefits of the IGBT supply unit is a power factor near unity and an extremely low harmonic current content, which eliminates the need for costly filtering.
Because of the low current harmonics and the robust design, the supply unit is also an ideal solution to meet stringent supply authority requirements.
The supply unit features a special identification routine that automatically determines the frequency, the phase order and the voltage level in the network when the power is switched on.
Thus commissioning time is reduced to a minimum.
The control and modulation of the supply unit is based on the direct torque control (DTC) principle, used in all of ABB's high performance drives.
This optimises the IGBT switching pattern to varying network and load conditions.
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