Vito J Marchione

US Patent:

47331585, Mar 22, 1988

Filed:

Aug 21, 1986

Appl. No.:

6/898713

Inventors:

Vito J. Marchione - Panorama City CA
James W. Brunelle - Granada Hills CA

Assignee:

Datametrics Corporation - Chatsworth CA

International Classification:

G05F 116

US Classification:

323258

Abstract:

A tap-switching circuit for automatically controlling the output voltage of a multi-tap transformer in response to a varying input line voltage and/or system load current demand, includes voltage sensing circuitry in parallel with both the transformer voltage outputs and a voltage comparator for sensing changes in the system load demand requirements. A voltage reference is provided for automatically generating a pre-selected voltage reference level signal for the line and/or system load requirements. Voltage comparison circuitry is operatively connected with the voltage sensing circuitry for generating an enable signal whenever the input line voltage and/or system load current demand requirements sensed by the voltage sensing circuitry falls below the pre-selected voltage reference level signal. A switching circuit is operatively connected to the voltage comparison circuitry, a linear regulator and to at least two taps of the multi-tap transformer for connecting the higher voltage tap to supply a pre-regulator voltage to the linear regulator whenever the enable signal is present, and for disconnecting the higher voltage tap from supplying its pre-regulator output voltage whenever the enable signal is absent.

US Patent:

61041610, Aug 15, 2000

Filed:

May 10, 1999

Appl. No.:

9/307855

Inventors:

Sung Chung - Fullerton CA
Joseph Lansford - Los Angeles CA
John G. Hayes - Redondo Beach CA
Vito J. Marchione - Panorama City CA
Kwang Yi - Los Angeles CA

Assignee:

General Motors Corporation - Detroit MI

International Classification:

H02J 700
H01G 435

US Classification:

320109

Abstract:

AC isolation apparatus, such as is provided by an AC isolation capacitor disposed between unexposed and exposed portions of the chassis of a charging system or an electric vehicle. The AC isolation apparatus or capacitor provides a high impedance at 50/60 Hertz between the electric vehicle and the charging system, thus isolating their respective chassis grounds.