A frequency-variable power machine is composed of motor, boosting transmission unit, electric generator, transformer electrically connected to electric generator, frequency variator whose input is connected to output of transformer and whose output is connected with input of motor, charger, and accumulator connected to output of transformer via chager. Said boosting transmission unit has the class-one crank-connecting rod boosting unit and gear speed-reducing unit at its front part and the class-two same units at its back part. Its advantages are high power output efficiency, saving energy and no environmental pollution. |