|
Induction motor efficiency analysis: direct torque, flux control
by Dr. Rupert Gouws, North-West University
An efficiency analysis of an induction motor with direct torque and flux control at a hot rolling mill. In this study, two scenarios were evaluated: where the induction motor was controlled at a constant speed with a variable thickness slab, and where the speed of the induction motor was controlled according to the thickness of the slab... ( more) |
|
The DC motor revival
by Christer Söderberg, ABB
DC motors have, in the past, been regarded as "extinct", but thyristor converters have come to the rescue. Many of the motor's key attributes were previously considered mutually exclusive; it was not possible to combine them in the same machine... (more) |
Network-connected Modbus devices
Information from Extech Safety SystemsModbus is the most widely used communications protocol in process industries today and the de facto field-level connectivity solution. MTL Instruments' wireless solutions can connect a range of Modbus devices over a standalone network, or transfer the data to a host computer for remote monitoring and control... ( more) |
Corporate energy management
by Deon van Aardt, WonderwareEnergy management at the enterprise level is not only the responsibility of plant managers and engineers; it has now become the responsibility of corporate management as well... ( more) |
Diagnostic insulation testing
Information from MeggerInsulation defects are the most common cause of electrical failure or damage and regular testing of the quality of the insulation is a decisive part of every maintenance programme... ( more) |
|
New technologies, standards influence
RE applications
by Dr. Wilfred Fritz, Cape Peninsula University of TechnologyWith dwindling fossil fuel reserves and pollution as by-products with the consumption of these types of fuels, it has become imperative to develop new carbon credit-friendly distributed electrical systems to increase capacity in the ever-increasing electrical load... ( more) |
Users unaware of dangers of fluorescent lamp conversions 
Experts Q&A
