AC drive-controlled turbo blowers save energy
July 04th 2010

Aeration blowers have an important task in wastewater treatment, but their handicap is high energy consumption. Houston, Texas based company, HSI, introduced in early 2008 the air bearing HT series blower, which can reduce energy costs by 20-40%.

HSI has chosen the Vacon NXP liquid-cooled drive to vary the speed on their High Speed Turbo blower. The liquid-cooled Vacon NXP drive has the capability to control the speed on a special permanent magnet 2 pole motor that can exceed speeds of 520 Hz. Another major benefit is the small footprint, typically 33% that of an air-cooled drive. This allows the drive to be installed in the blower enclosure, maintaining the compact size and low noise features of the High Speed Turbo blower.

HSI is also a leading manufacturer of Multistage blowers that use a standard induction motor. HSI’s choice of drive is the air-cooled Vacon NXS drive. One item that separates Vacon from other drive companies is their built-in AC line choke in the air-cooled Vacon NXS drives.

The HSI HT series are shipped as a pre-engineered working system with integrated controls, Vacon variable frequency drive, filter inlet, and electrical disconnect to keep installation costs to a minimum.

Two key advantages with the Vacon drive are continuity between the programming for the liquid-cooled and the air-cooled NXS drives and the possibility to use 10 kHz output carrier frequency that results in reduced audible noise.

More articles from Vacon Plc: