Electricity + Control August 2015

TRANSFORMERS + SUBSTATIONS

ROUND UP

Induction motor with highest power density in its class When it comes to technology, there seems to be no denying that smaller is better. The more advanced the world becomes in its capabilities, the more we rely on technologies to help us realise our maximum potential. More than ever, heavy industry is experiencing the same pres- sure to process more without compromising operational performance. Today, GE Power Con- version announces its latest induction motor leading the way in facing the challenge. With over one hundred years of experience in developing induction motor technology, the N37 induction motor is an upgrade to the well-established N3 motor line. It builds on a time-proven design with cutting-edge mechanics in order to meet heightened customer demands on footprint and performance. Working to decrease the component weight, GE Power Conversion achieved an induction motor design with a dramatically increased power per kilogram ratio. At a lower frame size than conventional induction motors, this compact design translates to space savings and lower weight, essential both in onshore and offshore applications.The N37 squirrel-cage induc- tion motors operate at 50 Hz and will soon be available in 60Hz. The N37 is among the most efficient motors in its class. GE’s solution works to reduce energy waste while simultaneously reducing the operator’s environmental footprint. “We’re constantly facing tougher demands in the power conversion industries – customers want products that are simplified, streamlined and compact but nevertheless meet increasing performance expectations,” said Luc de Camas, product leader, GE Power Conversion. “GE is responding to this call with the N37, which retains all the benefits of tried and tested technology but has been adapted to bring increased convenience to the operator”.The N37 launch marks the first of GE Power Conversion’s induction motors to be standardised for a wide range of industrial applications. Enquiries: Email paul.floren@ge.com

Energy consumption reduced by up to 50 % “ Voith Turbo’s advanced new closed loop differential pump (CLDP) servo drive design is simple. The heart of the unit is an integrated servo pump consisting of a servo motor and an internal gear pump. Its flow rate is per-fectly matched to the cylinder surfaces of a differential cylinder,” says Grant Robinson,VoithTurbo vice-president – EMEA Division, Mining and Metals SouthernAfrica. The unit also includes intelligent control via fieldbus connection, a pressure limiter, and a small compensating tank. This control system design renders

other components, such as expensive valve engineering, unnecessary. “Energy losses caused by throttle effects do not occur with the CLDP.This increases the machine energy savings by up to 50 %, compared to machinery using conventional drive systems,” adds Robinson. Enquiries:Terry-Lynn McIntosh.Tel. 011 418 4000 or emailTerry.Mcintosh@voith.com