Claims:1. A method of controlling voltage supply to a headlamp (102) and a battery (104) of a vehicle, the method comprising:
generating, by a generator (106) coupled to an engine of the vehicle, alternate current (AC) voltage signals;
when speed of generator is below a first predetermined generator speed, providing the AC voltage signals to the headlamp (102) and zero voltage signal to the battery (104);
when speed of generator is at or above the first predetermined generator speed and below a second predetermined generator speed, providing negative half-wave portions of the AC voltage signals to the headlamp (102) and zero voltage signal to the battery (104); and
when speed of generator is at or above the second predetermined generator speed, providing the negative half-wave portions of the AC voltage signals to the headlamp (102) and positive half-wave portions of the AC voltage signals to the battery (104).

2. The method as claimed in claim 1, wherein the AC voltage signals, generated by the generator (106), have a maximum amplitude proportional to the speed of generator.

3. The method as claimed in claim 2, comprising:
maintaining, by a negative control circuit (118), the maximum amplitude of the negative half-wave portions of the AC voltage signals across the headlamp (102) to a required headlamp voltage, when the speed of generator is at or above the first predetermined generator speed, wherein the negative control circuit (118) includes a surrogate load (128) and surrogate voltage regulator (130).

4. The method as claimed in claim 3, wherein the required headlamp voltage is 14 Volts.

5. The method as claimed in claim 1, wherein the first predetermined generator speed is 1100 RPM.

6. The method as claimed in claim 1, wherein the second predetermined generator speed is 1300 RPM.

7. A system (100) for controlling voltage supply to a headlamp (102) and a battery (104) of a vehicle, the system (100) comprising:
a generator (106), coupled to an engine of the vehicle, to generate alternate current (AC) voltage signals;
the headlamp (102) coupled to the generator (106) through a first switching device (110) and through a second switching device (112), wherein the first switching device (110) provides negative half wave portions of the AC voltage signals to the headlamp (102) from the generator (106), and wherein the second switching device (112) provides positive half wave portions of the AC voltage signals to the headlamp (102) from the generator (106);
the battery (104) coupled to the generator (106) through a third switching device (114), wherein the third switching device (114) provides positive half wave portions of the AC voltage signals to the battery (104) from the generator (106); and
a control circuit (108), coupled to the generator (106), the first switching device (110), the second switching device (112), and the third switching device (114), to:
receive the AC voltage signals from the generator (106);
switch ON the first switching device (110) for providing the negative half-wave portions of the AC voltage signals to the headlamp (102);
switch ON the second switching device (112) for providing the positive half-wave portions of the AC voltage signals to the headlamp (102), when speed of generator is below a first predetermined generator speed;
switch OFF the second switching device (112) for blocking the positive half-wave portions of the AC voltage to the headlamp (102), when the speed of generator is at or above the first predetermined generator speed;
switch OFF the third switching device (114) for providing zero voltage signal to the battery (104), when the speed of generator is below a second predetermined generator speed; and
switch ON the third switching device (114) for providing the positive half-wave portions of the AC voltage signals to the battery (104), when the speed of generator is at or above the second predetermined generator speed.

8. The system (100) as claimed in claim 7, wherein the control circuit (108) is coupled in series with the generator (106).

9. The system (100) as claimed in claim 7, wherein the AC voltage signals, generated by the generator (106), have a maximum amplitude proportional to the speed of generator.

10. The system (100) as claimed in claim 7, wherein the control circuit (108) comprises:
a negative control circuit (118) to maintain the maximum amplitude of the negative half-wave portions of the AC voltage signals across the headlamp (102) to a required headlamp voltage, when the speed of the generator (106) is at or above the first predetermined generator speed, wherein the negative control circuit (118) comprises a surrogate load (128) and a surrogate voltage regulator (130).

11. The system (100) as claimed in claim 10, wherein the required headlamp voltage is 14 Volts.

12. The system (100) as claimed in claim 7, wherein the first predetermined generator speed is 1100 RPM.

13. The system (100) as claimed in claim 7, wherein the second predetermined generator speed is 1300 RPM.

14. The system (100) as claimed in claim 7, wherein the first switching device (110), the second switching device (112), and the third switching device (114) are silicon controlled rectifiers (SCR).
, Description:N/A