Low cost electronic ultracapacitor interface technique to provid

Details Low cost electronic ultracapacitor interface technique to provid Low cost electronic ultracapacitor interface technique to provid

1996-05-28

1998-03-03

Ro, Bentsu

Electricity: motive power systems

Battery-fed motor systems

318440, 318500, 307 44, 307 72, 323223, 323230, 323282, H02M 753, H02P 701

Patent

active

057239568

ABSTRACT:
A battery load leveling arrangement for an electrically powered system in which battery loading is subject to intermittent high current loading utilizes a passive energy storage device and a diode connected in series with the storage device to conduct current from the storage device to the load when current demand forces a drop in battery voltage. A current limiting circuit is connected in parallel with the diode for recharging the passive energy storage device. The current limiting circuit functions to limit the average magnitude of recharge current supplied to the storage device. Various forms of current limiting circuits are disclosed, including a PTC resistor coupled in parallel with a fixed resistor. The current limit circuit may also include an SCR for switching regenerative braking current to the device when the system is connected to power an electric motor.

REFERENCES:
patent: 5047913 (1991-09-01), DeDoncker et al.
patent: 5260637 (1993-11-01), Pizzi
patent: 5373195 (1994-12-01), DeDoncker et al.
patent: 5591212 (1997-01-01), Keimel
Design Methodologies For Soft Switched Inverters; D.M. Divan, G. Venkataramanan, R.W. DeDoncker; 1988 IEEE pp. 758-766, 88CH2565.

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