High voltage charger

Details High voltage charger High voltage charger

1996-06-07

1998-03-03

Tso, Edward

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 5, 607 5, H01M 1044, H01M 1046

Patent

active

057239690

ABSTRACT:
A high voltage charger operates in a three-phase cycle. In a first phase, the high voltage charger operates at a fixed frequency. In a second phase, the high voltage charger operates at a variable frequency designed to draw a substantially constant average current from a power source. In the third phase, the high voltage charger returns to fixed frequency operation. The variable frequency is the reciprocal of the sum of an on-time and an off-time of the switch. In one embodiment, the on-time is provided by the time required for the switch to reach a predetermined maximum and the off-time is provided by the time over which a magnetic field in a transformer collapses.

REFERENCES:
patent: 3938018 (1976-02-01), Dahl
patent: 4031449 (1977-06-01), Trombly
patent: 4080558 (1978-03-01), Sullivan
patent: 4082097 (1978-04-01), Mann et al.
patent: 4548209 (1985-10-01), Wielders et al.
patent: 4830006 (1989-05-01), Haluska et al.
patent: 5048521 (1991-09-01), Pless et al.
patent: 5251624 (1993-10-01), Bocek et al.
patent: 5265588 (1993-11-01), Nelson et al.

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