Power supplies

Details Power supplies Power supplies

1992-03-20

1993-11-09

Ro, Bentsu

Electricity: power supply or regulation systems

Input level responsive

318254, G05F 500

Patent

active

052606457

ABSTRACT:
The power supply of a brushless d.c. motor has a trigger circuit that controls the frequency of a ramp generator which receives an output Vs from an unregulated voltage supply. The amplitude of the output V.sub.R of the ramp generator is dependent on the amplitude of its input. A comparator receives the ramp output V.sub.R at one input and a steady voltage V.sub.D at the other input. The comparator produces a pulse output Vc, with each pulse being initiated and terminated at transitions of the ramp signal and the steady signal so that the width of each pulse increases when the unregulated voltage source decreases. The pulse output Vc is supplied to the control input of the motor's commutation circuit. The commutation circuit switches the supply voltage Vs to the coils of the motor under control of the input Vc so that its mean d.c. output is independent of variation in the supply voltage.

REFERENCES:
patent: 3946302 (1976-03-01), Kovalick et al.
patent: 4168476 (1979-09-01), Petrizio
patent: 4230970 (1980-10-01), Potter et al.
patent: 4241278 (1980-12-01), Walther
patent: 4510422 (1985-04-01), Ogura
patent: 4580090 (1986-04-01), Bailey et al.
patent: 4634892 (1987-01-01), Isbell et al.
patent: 4658204 (1987-04-01), Goodwin
patent: 4763347 (1988-08-01), Erdman
patent: 4845605 (1989-07-01), Steigerwald
patent: 4973876 (1990-11-01), Roberts

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