induction generator is operating combinational logic circuit 41 provides the signals which close the switches p1 p9 to effect the desired circuit connections as described above in connection with fig5 and 6 to this end the combinational logic circuit receives a first series of control signals from a first counter 43 which in effect regulates the generator frequency by those signals passed over line 44 to the combinational logic circuit signals from the second counter 45 are passed over line 46 to the combinational logic circuit and these signals in effect determine the frequency of the output voltage passed by the converter over the output conductors such as 16 17 and 18 in fig1 to any suitable a c load the control signals provided by first counter 43 are in turn determined by timing signals issued by a first oscillator circuit 47 and the frequency of these timing signals is determined by some adjusting means represented by adjustable knob 48 the output or timing signals from oscillator 47 are provided on line 50 the second oscillator 51 also includes some means designated 52 for adjusting the frequency of the timing signals provided on its output line 53 those skilled in the art will appreciate that the output signals on lines 50 53 could be applied directly to the counters 43.