Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1990-12-24
1993-10-19
Peckman, Kristine L.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 32, 320 39, H02J 704
Patent
active
052549321
ABSTRACT:
Charging voltage and current control circuits for battery chargers provide for a constant output voltage above a first predetermined value of charging current and an increasing output voltage below the first predetermined value of charging current. The charger makes use of a pulse-width modulated control circuit utilizing a variable duty cycle proportional to charging current and couples a signal proportional to charging current via a diode-resistor network to the pulse-width modulator for values below the first predetermined value of charging current. A current limit control circuit provides a current limit function by driving the pulse-width modulator to a minimum duty cycle during overcurrent conditions.
REFERENCES:
patent: 3816806 (1974-06-01), Mas
patent: 3864617 (1975-02-01), Smith et al.
patent: 4233553 (1980-11-01), Prince, Jr. et al.
patent: 4243929 (1981-01-01), Lenart
patent: 4876495 (1989-10-01), Palanisamy
patent: 4924169 (1990-05-01), Shifflet et al.
Unitrode Linear Integrated Circuits Databook, 1987, pp. 9-87-9-92, Modeling Analysis and Compensation of the Current-Mode Converter, Application Note 7-97.
Unitrode Applications Handbook 1987-1988, pp. 220-233, Application Note U-100, UC3842 Provides Low-Cost Current-Mode Control.
Modern DC-to-DC Switchmode Power Converter Circuits, Rudolf P. Serverns and Gordon (Ed) Bloom, Van Nostrand Reinhyold Company, New York, 1985, chapters 1 and 5, pp. 1-10 and 112, 130-135.
Official Proceedings of the Nineteenth International Power Conversion Conference, Oct. 15-20, 1989, Intertec Communications, Inc., 1989 A New, Continuous-Time Model for Current-Mode Control by Raymond B. Ridley, pp. 455-463.
High-Frequency Switching Power Supplies: Theory and Design, by George Chryssis, McGraw-Hill, 1984, Chapter 2, pp. 5-10; Chapter 3, pp. 11-23; Chapter 8, pp. 149-163.
Bittar Hussein I.
Karlin Richard A.
MagneTek, Inc.
Peckman Kristine L.
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