Joseph L Parisella

US Patent:

6906474, Jun 14, 2005

Filed:

Sep 29, 2003

Appl. No.:

10/674143

Inventors:

Grigoriy A. Trestman - Salem MA, US
Joseph L. Parisella - Beverly MA, US
Richard H. Koeppl - Topsfield MA, US

Assignee:

Osram Sylvania, Inc. - Danvers MA

International Classification:

H05B037/00

US Classification:

315224, 315251, 315DIG 5, 363 44

Abstract:

A ballast () for powering at least one gas discharge lamp () from a three-phase AC voltage source () comprises a three-phase rectifier circuit (), a high frequency filter capacitor (), and a high frequency inverter (). Preferably, three-phase rectifier circuit () is implemented by a six-diode bridge, and high frequency filter capacitor () can be realized by a film capacitor or a ceramic capacitor. Ballast () provides a high power factor and low total harmonic distortion without requiring a dedicated power factor correction circuit. Other benefits of ballast () include enhanced efficiency, longer life, and lower inrush current.

US Patent:

7068136, Jun 27, 2006

Filed:

Mar 24, 2004

Appl. No.:

10/807797

Inventors:

John H. Selverian - North Reading MA, US
William D. Koenigsberg - Concord MA, US
Joseph L. Parisella - Beverly MA, US

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H01F 27/29

US Classification:

336192, 336198

Abstract:

A coil bobbin () has a housing () having a floor () with at least one electrical lead-in () projecting therethrough for attachment to a printed circuit board (). The at least one electrical lead-in () is provided with thermal-strain relief () between said floor () and the printed circuit board (). In a preferred embodiment of the invention the strain relief takes the form of a loop formed in the lead-in.

US Patent:

7102297, Sep 5, 2006

Filed:

Mar 31, 2005

Appl. No.:

11/096008

Inventors:

Grigoriy A. Trestman - Salem MA, US
Joseph L. Parisella - Beverly MA, US

Assignee:

Osram Sylvania, Inc. - Danvers MA

International Classification:

H05B 41/16

US Classification:

315282, 315274, 315291, 315312, 315209 R

Abstract:

An electronic ballast () for powering a lamp load comprising an even number of gas discharge lamps () includes an inverter (), an output circuit (), and a protection circuit (). During operation, protection circuit () disables the inverter () in response to an end-of-lamp-life condition that is characterized by a predetermined imbalance in the operating current provided to each of the even number of lamps. Preferably, the output circuit () includes a current-sensing transformer () for detecting the predetermined imbalance, and the protection circuit () includes a silicon-controlled rectifier () for disabling the inverter ().

US Patent:

7154229, Dec 26, 2006

Filed:

Nov 4, 2004

Appl. No.:

10/982379

Inventors:

Felix I. Alexandrov - Bedford MA, US
Joseph L. Parisella - Beverly MA, US
Thomas J. Schalton - Beverly MA, US

Assignee:

Osram Sylvania, Inc. - Danvers MA

International Classification:

H05B 39/04

US Classification:

315209R, 315307, 315294, 315291, 315324

Abstract:

An electronic ballast () for powering at least one gas discharge lamp () includes a current-fed resonant inverter () and a load shed circuit (). Inverter () ordinarily powers the lamp at a first level. When a load shed command is sent by the electric utility and received by an associated load shed receiver within the ballast (), load shed circuit () causes the inverter to reduce the lamp power from the first level to a second level. Preferably, load shed circuit () includes an isolation circuit () and a bidirectional switch () that is coupled in parallel with a return ballasting capacitor () within inverter (). In the absence of a load shed command, bidirectional switch () effectively shunts return ballasting capacitor (), which causes the lamp to be powered at the first level. In response to a load shed command, bidirectional switch () ceases to shunt return ballasting capacitor (), thereby causing the lamp power to be reduced to the second level.

US Patent:

7288901, Oct 30, 2007

Filed:

Sep 15, 2006

Appl. No.:

11/532277

Inventors:

Qinghong Yu - Reading MA, US
Grigoriy A. Trestman - Salem MA, US
John Konopka - Deer Park IL, US
Joseph L. Parisella - Beverly MA, US

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

G05F 1/00

US Classification:

315291, 315274, 315312, 315247, 315307

Abstract:

A ballast () for powering one or more gas discharge lamps () comprises an inverter (), an output circuit (), and an arc protection circuit (). Arc protection circuit () monitors an electrical signal within the output circuit (). When an arcing condition occurs at the ballast output connections (), the electrical signal includes a high frequency component having a fundamental frequency that is much greater than the normal operating frequency of the inverter (). In response to the high frequency component exceeding a predetermined threshold, arc protection circuit () disables the inverter () for a predetermined shutdown period. Arc protection circuit () also provides a restart function for periodically attempting to ignite and operate the lamps. Arc protection circuit () is preferably realized using a microcontroller integrated circuit () with associated discrete circuitry, and is especially well-suited for use in ballasts for powering multiple lamps via a current-fed self-oscillating inverter and an isolated parallel resonant output circuit.

US Patent:

7312588, Dec 25, 2007

Filed:

Sep 15, 2006

Appl. No.:

11/532235

Inventors:

Qinghong Yu - Reading MA, US
Joseph L. Parisella - Beverly MA, US

Assignee:

Osram Sylvania, Inc. - Danvers MA

International Classification:

G05F 1/00

US Classification:

315291, 315224, 315225, 315209 R, 315324, 315360, 315DIG 5, 315DIG 7

Abstract:

A ballast () for powering one or more gas discharge lamps () comprises an inverter () and a lamp fault protection circuit (). Inverter () has an operating frequency that is load-dependent. Lamp fault protection circuit () monitors an electrical signal within inverter (). In response to a change in the fundamental frequency of the electrical signal, such as what occurs when a lamp is removed, when a lamp approaches the end of its operating life, or when an arcing condition occurs at one or more of the ballast output connections (), lamp fault protection circuit () disables the inverter () for a predetermined shutdown period. Lamp fault protection circuit () also provides a restart function for periodically attempting to ignite and operate the lamps. Additionally, in response to a sustained fault condition, lamp fault protection circuit () increases the predetermined shutdown period so as to minimize any undesirable effects due to the restart function. Lamp fault protection circuit () is preferably realized using a suitable microcontroller integrated circuit () with associated discrete circuitry, and is especially well-suited for use in ballasts for powering multiple lamps via a current-fed self-oscillating inverter and an isolated parallel resonant output circuit.

US Patent:

7468586, Dec 23, 2008

Filed:

Oct 5, 2007

Appl. No.:

11/867905

Inventors:

Qinghong Yu - Salem, CN
Grigoriy A Trestman - Salem MA, US
John Konopka - Deer Park IL, US
Joseph L. Parisella - Beverly MA, US

Assignee:

Osram Sylvania, Inc. - Danvers MA

International Classification:

G05F 1/00

US Classification:

315307, 315291, 315224, 315274, 315247

Abstract:

A ballast () for powering one or more gas discharge lamps () comprises an inverter (), an output circuit (), and an arc protection circuit (). Arc protection circuit () monitors an electrical signal within the output circuit (). When an arcing condition occurs at the ballast output connections (), the electrical signal includes a high frequency component having a fundamental frequency that is much greater than the normal operating frequency of the inverter (). In response to the high frequency component exceeding a predetermined threshold, arc protection circuit () disables the inverter () for a predetermined shutdown period. Arc protection circuit () also provides a restart function for periodically attempting to ignite and operate the lamps. Arc protection circuit () is preferably realized using a microcontroller integrated circuit () with associated discrete circuitry, and is especially well-suited for use in ballasts for powering multiple lamps via a current-fed self-oscillating inverter and an isolated parallel resonant output circuit.

US Patent:

7528558, May 5, 2009

Filed:

May 11, 2007

Appl. No.:

11/747298

Inventors:

Qinghong Yu - Reading MA, US
Joseph L. Parisella - Beverly MA, US

Assignee:

Osram Sylvania, Inc. - Danvers MA

International Classification:

H05B 37/02

US Classification:

315308, 315209 R, 315225

Abstract:

A ballast () for powering a lamp load () comprising one or more gas discharge lamps () includes an inverter (), a resonant output circuit (), and a control circuit (). During operation of ballast (), control circuit () monitors at least one voltage within one or more series resonant circuits of output circuit (). When the monitored voltage reaches a specified level, control circuit () directs inverter () to maintain its operating frequency at a present value for a predetermined period of time, so as to allow output circuit () to provide a suitably high voltage for igniting the lamp(s). If the lamp(s) ignite within the predetermined period of time, control circuit () ceases controlling inverter () to maintain its operating frequency at the present value, so as to allow for normal operation of the lamp(s). Control circuit () also provides a lamp stabilization function, in which the inverter operating frequency is prevented from falling below a specified minimum value, and a protective function, in which inverter () is deactivated in response to failure of the lamp(s) to ignite within the predetermined period of time.