XLI. On self-regulating dynamo-electric machines

DESIGN OF ELECTRIC MACHINES: Axial Flux Machines

The Self - Similar Turbulent Dynamo

We consider the problem of magnetic-energy amplification by a turbulent flow of conducting fluid. This effect is known as the small-scale turbulent dynamo, and it is believed to be relevant in application to magnetic fields in astrophysical objects. It is, in fact, a generic property of random (in time and/or space) flows that they can amplify magnetic fluctuations at scales smaller than the sc...

A review on recent applications of brushless DC electric machines and their potential in energy saving

Electric motors are the largest consumer of world electric energy, consuming more than twice as much as lighting, the next largest consumer. Electric motors account for between 43 and 46% of all global electricity consumption approximately. They give rise to about 6 040 Mt of CO2 emissions. End‐users approximately spend USD 565 billion per year on electricity [1]. In recent years...

Comment on “The sunspot as a self-excited dynamo”

A recent paper claims that the well known Cowling ‘anti-dynamo’ theorem is a “misconception”, and that a simple axisymmetric sunspot model constitutes a counter example. We do not believe these claims to have been substantiated.

A review on recent applications of brushless DC electric machines and their potential in energy saving

Electric motors are the largest consumer of world electric energy, consuming more than twice as much as lighting, the next largest consumer. Electric motors account for between 43 and 46% of all global electricity consumption approximately. They give rise to about 6 040 Mt of CO2 emissions. End‐users approximately spend USD 565 billion per year on electricity [1]. In recent years, increase in e...