Control of current in an inductance with pulse width...

Details Control of current in an inductance with pulse width... Control of current in an inductance with pulse width...

2007-09-18

2007-09-18

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

C318S293000, C318S599000

Reexamination Certificate

active

10899653

ABSTRACT:
A PWM controller for a bridge driver circuit for controlling current in an inductive load such as a motor, can set the driver into a forward mode, a slow decay mode or a fast decay mode, and can switch from slow decay mode into forward mode or into fast decay mode for the duration of pulses at controlled time intervals to provide pulse width modulated control of the current. This is a simpler control scheme avoiding complex switching schemes related to mixed mode decay. By using a controlled PWM frequency, it is easier to avoid the problems of variable frequency such as increased heat dissipation or acoustic noise generation. It can have a selector for selecting top or bottom sense switching, enabling a wider range of stable PWM duty-cycles to be used (e.g. 0% to 100%), which is useful to compensate for Back emf influence on coil-drive.

REFERENCES:
patent: 4475086 (1984-10-01), Allen
patent: 4710686 (1987-12-01), Guzik
patent: 4757241 (1988-07-01), Young
patent: 5428522 (1995-06-01), Millner et al.
patent: 6342822 (2002-01-01), So
patent: 2003/0080710 (2003-05-01), Tierling
patent: 19742370 (1998-04-01), None
patent: 19704089 (1998-08-01), None
patent: 2002204150 (2002-07-01), None
Four-Quadrant Sensorless Brushless ECM Drive; R.C. Becerra, T.M. Jahns, M. Ehsani, 1991 IEEE pp. 202-209 (Article 1).
Dual-Stepping Motor Driver IC Using PWM Chopper, XP - 002433646, Mar. 09, 1999 (Article 2 ).
XP-002433648, TLE 472x Stepper Motor Drivers Current Control Method and Accuracy, pp. 1-4, V1.1, May 2001 (Article 3).
XP-002433647, Microstepping DMOS Driver With Translator, pp. 1-18 (Article 4).
European Search Report; Reference No.: A2887-EP, Application No.: 04077147.9-2207.

Affiliated with

Also associated with

Rating

Control of current in an inductance with pulse width... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control of current in an inductance with pulse width..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control of current in an inductance with pulse width... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3790667