Product category:
Industrial Drives/Controls
News Release from: Mitsubishi Electric Automation Systems | Subject: HC Active Bridge unit
Edited by the Engineeringtalk Editorial
Team on 18 July 2001
Active Bridge eliminates unwanted drive
harmonics
Mitsubishi Electric has released a High Current Active Bridge unit for its variable speed drives, designed to eliminate unwanted harmonics caused by traditional drive controllers
Mitsubishi Electric has released a High Current (HC) Active Bridge unit for its Variable Speed Drive (VSD) ranges, which is designed to eliminate unwanted harmonics caused by traditional drive controllers The HC Active Bridge unit effectively replaces the usual 6 input diodes normally used on a VSD, and replaces them with 6 power transistors, which switch in phase with the supply voltage sine wave - effectively eliminating harmonic noise
This article was originally published on Engineeringtalk on 8 May 2000 at 8.00am (UK)
Related stories
Industrial robots can sit on a mousemat!
The RP-1AH is the first of a new range of industrial robots from Mitsubishi Electric that defines a new class of flexible automation for general production and precision assembly tasks.
The typical harmonic distortion total from a standard VSD across all the harmonic orders is about 30%.
The performance improvement of the new HC Active bridge unit gives a VSD a harmonic distortion of 1% in driving mode and down to 0.7% in regenerative mode, dramatically reducing unwanted harmonics and increasing energy efficiency.
A bonus in utilising this technology, is that it removes harmonics yet can flow energy equally well from the drive back onto the incoming supply, thus conserving even more energy, especially on overhauling loads.
The development of this new harmonic control unit is a direct response by Mitsubishi Electric to the impact of the recent G5/4 initiative to provide an effective solution to unwanted harmonics.
The arrival of this new technology enables Mitsubishi Electric's VSDs to replace traditional four quadrant controllers, in many applications, removing the need to use DC Drives from most motor control. Request a free brochure from Mitsubishi Electric Automation Systems ...
• Mitsubishi Electric Automation Systems: contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
