d.c. Blocking oscillator charging device for electric vehicles

Details d.c. Blocking oscillator charging device for electric vehicles d.c. Blocking oscillator charging device for electric vehicles

1981-03-12

1983-12-27

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

320 59, 363 71, H02M 3335

Patent

active

044234767

ABSTRACT:
A charging device for traction batteries of an electric vehicle consists of a converter module with at least two d.c. blocking converters, each including a control power transistor, a cutoff relief circuit, and a power transformer. The secondary winding of the transformer is connected in series with a rectifier diode and a smoothing capacitor is connected in parallel to the series circuit. The parallel-connected secondary sides of the two blocking converters are connected in such a way that the one secondary winding on the one hand is connected to the negative output terminal and on the other hand by way of one rectifier diode to the positive output terminal. Another secondary winding is connected on the one hand to the positive output terminal and, on the other hand, by way of another rectifier diode to the negative output terminal. A relief circuit composed of diodes is provided on the secondary side of the transformer. All diodes on the secondary side are pulled in such a way that they are current-conductive away from one secondary winding and/or toward the other secondary winding. A smoothing capacitor common to all is provided between the output terminals.

REFERENCES:
patent: 3621363 (1971-11-01), Ginnman
patent: 3697852 (1972-10-01), Gerbitz
patent: 4195333 (1980-03-01), Hedel
patent: 4276588 (1981-06-01), McLyman
patent: 4313155 (1982-01-01), Bock et al.

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