Power electronic interface circuits for batteries and ultracapac

Details Power electronic interface circuits for batteries and ultracapac Power electronic interface circuits for batteries and ultracapac

1996-05-28

1998-01-20

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

323271, 318139, H02M 75387

Patent

active

057106991

ABSTRACT:
A method and apparatus for load leveling of a battery in an electrical power system includes a power regulator coupled to transfer power between a load and a DC link, a battery coupled to the DC link through a first DC-to-DC converter and an auxiliary passive energy storage device coupled to the DC link through a second DC-to-DC converter. The battery is coupled to the passive energy storage device through a unidirectional conducting device whereby the battery can supply power to the DC link through each of the first and second converters when battery voltage exceeds voltage on the passive storage device. When the load comprises a motor capable of operating in a regenerative mode, the converters are adapted for transferring power to the battery and passive storage device. In this form, resistance can be coupled in circuit with the second DC-to-DC converter to dissipate excess regenerative power.

REFERENCES:
patent: 4904918 (1990-02-01), Bailey et al.
patent: 5047913 (1991-09-01), DeDoncker et al.
patent: 5170105 (1992-12-01), Kumar
patent: 5373195 (1994-12-01), DeDoncker et al.
patent: 5552681 (1996-09-01), Suzuki et al.
Design Methodologies For Soft Switched Inverters; D.M. Divan, G. Venkataramanan, R.W. DeDoncker; 1988 IEEE; pp. 758-766.

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