ELECTRICAL MACHINERY AND APPARATUS

PROBLEM TO BE SOLVED: To obtain electrical machinery and apparatus that use electrical energy with reasonable facilities at reasonable operating cost without harmful effects on the environment, by improving the efficiency of all the electrical machinery and apparatus that generate direct current. SOLUTION: The electrical machinery and apparatus contain a propelling assembly. The propelling assembly comprises a first circular supporting body 1 that has a plurality of first electromagnets 3 and is rotatable, and a second circular supporting body 2 that has a plurality of second electromagnets 8 and is fixed. For each of the second electromagnets 8 the optimum length L in meter of its winding is defined by the following equation; L=(s .0.003V)/(2k.I) where, V is the voltage supplied to the electromagnets in volt; k is a constant; s is the cross-sectional area of the winding in mm ; and I is the strength of current in ampere.