Patent ID: 7652440

Claim:
A switching system for controlling the starting of an electrical motor comprising: a first winding subsystem (M) for generating a first voltage signal; a second winding subsystem (AUX) for generating a second voltage signal and getting deactivated after the attainment of starting speed by said electrical motor; a first control means (I 1 , I 2 , C 2 , R 3 , C 1 , R 5 , U 1 , D 1 , C 3 , R 8 ) receiving said first and second voltage signal for computing the resultant of said first and second voltage signal to thereby produce at least two pulse signals corresponding to said resultant and to generate a first enabling signal to incorporate a delay in deactivation of said second winding subsystem, said delay corresponding to the configuration of said first control means; a charge storage means (C 5 ) coupled to said second winding subsystem responsive to the additional phase shift generated by second winding subsystem; a signal detection means (I 6 , C 6 ) for generating a second enabling signal; a second control means (U 3 , U 4 ) for generating an output signal responsive to said first and second enabling signals; a third control means (I 3 , C 4 , I 4 , R 11 , R 10 , D 5 , R 12 ) coupled to said second control means for generating a triggering signal; a triggering means (R 16 , C 7 , T 1 ) coupled to said third control means for triggering a regulating device to thereby generate an output for facilitating the commencement and completion of the start operation of said electrical motor; a time delayed hysteresis inducement means (R 9 , C 8 , I 5 ) responsive to the output signal for establishing a threshold value corresponding to the commencement and completion of the start operation, aid threshold value being established to overcome redundancy caused due to hysteresis; and a power supply means (T 2 , C 9 , Z 4 ) coupled to said first winding subsystem for generating power for said switching system.