Method for driving pulse-width-controlled inductive loads,...

Details Method for driving pulse-width-controlled inductive loads,... Method for driving pulse-width-controlled inductive loads,...

2007-02-20

2007-02-20

Patel, Rajnikant B. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S222000, C327S540000, C363S123000, C363S079000

Reexamination Certificate

active

11127047

ABSTRACT:
When a switch (20) that is in series with the inductive load (10) is turned on, the rise behavior of the current (I) is first of all detected until a nominal value (Iref) is reached, and a pulse duty factor (Te/Ta) of a pulse width modulator device (30) is determined from said rise behavior. Immediately after the nominal value (Iref) of the current (I) has been reached, the switch (20) is driven in a conventional manner by the pulse width modulator device (30), using the pulse duty factor (Te/Ta) that has been determined, in order to finely adjust the pulse duty factor (Te/Ta). The invention largely avoids overshoots during control and the adjustment time is thus considerably shorter than in conventional drive circuits.

REFERENCES:
patent: 5077652 (1991-12-01), Faley
patent: 6031707 (2000-02-01), Meyer
patent: 6850426 (2005-02-01), Kojori et al.
patent: 6992468 (2006-01-01), Kranz
patent: 2002/0050579 (2002-05-01), Near
patent: 198 24 761 (1999-07-01), None
patent: 199 07 505 (1999-09-01), None

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