Recently introduced: Generalised Electrical Machine Sets for Teaching

Two teaching machines based on Kron's theory of the primitive electrical machine have recently appeared on the market. Gabriel Kron suggested some 25 years ago that all electrical machines are specialised applications of a completely general ‘primitive’ machine. Applying this theory now, it is found possible to adopt a very general approach from the beginning to the teaching of electrical machines. In this, all the operating modes of every type of a.c. or d.c. motor or generator can be taught as special cases of a general machine, and the simplicity and flexibility of the machines described here allow scope for initiative and a very wide range of experiments