Patents by Inventor William J. Raddi
William J. Raddi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7082040Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: GrantFiled: March 25, 2004Date of Patent: July 25, 2006Assignee: Eaton Power Quality CorporationInventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson, Jr.
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Patent number: 6944035Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: GrantFiled: March 3, 2003Date of Patent: September 13, 2005Assignee: Eaton Power Quality CorporationInventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson, Jr.
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Patent number: 6856524Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: GrantFiled: March 3, 2003Date of Patent: February 15, 2005Assignee: Powerware CorporationInventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson, Jr.
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Publication number: 20040213022Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: ApplicationFiled: March 25, 2004Publication date: October 28, 2004Inventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson
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Patent number: 6661678Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: GrantFiled: May 20, 2002Date of Patent: December 9, 2003Assignee: Powerware CorporationInventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson, Jr.
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Publication number: 20030137197Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: ApplicationFiled: March 3, 2003Publication date: July 24, 2003Inventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson
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Publication number: 20020130648Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: ApplicationFiled: May 20, 2002Publication date: September 19, 2002Inventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson
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Patent number: 6400586Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: GrantFiled: March 20, 2001Date of Patent: June 4, 2002Assignee: Powerware CorporationInventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson, Jr.
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Patent number: 6314007Abstract: A power converter includes first and second voltage busses and a neutral bus. A first switching circuit, e.g., a rectifier circuit, is operative to selectively couple an input node thereof to the first and second voltage busses. A balancer circuit is operative to selectively couple the neutral bus to the first and second voltage busses such that relative magnitudes of respective first and second voltages on the first and second voltage busses are controlled responsive to respective first and second rates at which the balancer circuit couples the first and second voltage busses to the neutral bus. A second switching circuit, e.g., an inverter circuit, is operative to selectively couple the first and second voltage busses to a load connected at an output node thereof.Type: GrantFiled: January 8, 2001Date of Patent: November 6, 2001Assignee: Powerware CorporationInventors: Robert W. Johnson, Jr., William J. Raddi
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Publication number: 20010012209Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: ApplicationFiled: March 20, 2001Publication date: August 9, 2001Inventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson
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Patent number: 6262899Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: GrantFiled: May 2, 2000Date of Patent: July 17, 2001Assignee: Powerware CorporationInventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson, Jr.
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Publication number: 20010001535Abstract: A power converter includes first and second voltage busses and a neutral bus. A first switching circuit, e.g., a rectifier circuit, is operative to selectively couple an input node thereof to the first and second voltage busses. A balancer circuit is operative to selectively couple the neutral bus to the first and second voltage busses such that relative magnitudes of respective first and second voltages on the first and second voltage busses are controlled responsive to respective first and second rates at which the balancer circuit couples the first and second voltage busses to the neutral bus. A second switching circuit, e.g., an inverter circuit, is operative to selectively couple the first and second voltage busses to a load connected at an output node thereof.Type: ApplicationFiled: January 8, 2001Publication date: May 24, 2001Inventors: Robert W. Johnson, William J. Raddi
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Patent number: 6181581Abstract: A power converter includes first and second voltage busses and a neutral bus. A first switching circuit, e.g., a rectifier circuit, is operative to selectively couple an input node thereof to the first and second voltage busses. A balancer circuit is operative to selectively couple the neutral bus to the first and second voltage busses such that relative magnitudes of respective first and second voltages on the first and second voltage busses are controlled responsive to respective first and second rates at which the balancer circuit couples the first and second voltage busses to the neutral bus. A second switching circuit, e.g., an inverter circuit, is operative to selectively couple the first and second voltage busses to a load connected at an output node thereof.Type: GrantFiled: May 19, 2000Date of Patent: January 30, 2001Assignee: Samsung Electronics Co., Ltd.Inventors: Robert W. Johnson, Jr., William J. Raddi
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Patent number: 6160722Abstract: An uninterruptible power supply (UPS) includes an AC source port configured to connect to an AC power source, a DC source port configured to connect to a DC power source and a load port configured to connect to a load. A rectifier circuit is operative to selectively couple the AC source port to first and second voltage busses through a first inductance. An inverter circuit is operative to selectively couple the load port to the first and second voltage busses through a second inductance. A bidirectional DC source coupling circuit is operative to couple the DC source port to the first and second voltage busses to provide bidirectional power transfer therebetween, preferably such that a voltage at the DC source port is maintained in a substantially fixed proportion to first and second DC voltages at respective ones of the first and second voltage busses.Type: GrantFiled: September 22, 1999Date of Patent: December 12, 2000Assignee: Powerware CorporationInventors: James Thommes, Robert W. Johnson, Jr., William J. Raddi
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Patent number: 6069412Abstract: An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting the battery to the conversion components of the PFC circuit without adverse affect on the performance of the PFC circuit, and while holding the battery substantially connected to neutral. In a first embodiment, the circuit comprises a simple combination of four diodes and a pair of high pass capacitors arranged so that in both power line and battery supply modes the battery is balanced around neutral. In a second, preferred embodiment, one terminal of the battery is connected directly to neutral.Type: GrantFiled: March 29, 1993Date of Patent: May 30, 2000Assignee: Powerware CorporationInventors: William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson, Jr.
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Patent number: 5436512Abstract: A UPS device adapted for parallel connection to a load along with one or more other UPS devices, having circuitry for sharing of the load, including load harmonics. A feedback network has an error signal circuit which generates an error signal representative of the difference between the actual current provided by the device and the designated share of current it should provide. The error signal is transformed by a value representative of the effective output impedance of the UPS inverter, whereby the inverter is controlled to share the fundamental of the load current as well as the harmonics.Type: GrantFiled: September 24, 1992Date of Patent: July 25, 1995Assignee: Exide Electronics CorporationInventors: Haroon Inam, Robert W. Johnson, Jr., William J. Raddi
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Patent number: 4935861Abstract: An uninterrupted power supply (UPS) systems is provided comprising a rectifier circuit, an inverter circuit and a battery boost circuit. One of the input terminals of the rectifier circuit is for connection to the ungrounded conductor of an AC power source and the other input terminal of the rectifier circuit is for connection to the grounded conductor of the AC power source. The UPS has a pair of load terminals for connection to a load. The input terminal of the rectifier circuit for connection to the grounded conductor is connected to one of the pair of load terminals by an electrical conductor whose electrical continuity is maintained from this input terminal to the one of the pair of load terminals without any isolation device such as a 50 or 60 Hz transformer being disposed between the input terminal and the one of the pair of load terminals.Type: GrantFiled: June 13, 1989Date of Patent: June 19, 1990Assignee: Exide ElectronicsInventors: Robert W. Johnson, Jr., William J. Raddi, George W. Oughton
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Patent number: 4673825Abstract: An uninterruptible power supply including a transformer having a first input winding normally coupling an inverter AC source with a critical AC load, which transformer also includes a second input winding operable to supply power from a bypass source to the load in the event of malfunction of the inverter circuit. The inverter is of the four-quadrant pulse-width-modulated type, thereby to permit recharging of the battery which serves as the DC source to the inverter. An inductance is provided for varying the phase relationship between a utility voltage source and the inverter voltage to produce minimum real inverter current and the "break-even" operating conduction, and a step-up device is provided for increasing the utility voltage to further minimize the break-even inverter current required during normal operation, and to maximize the through-put efficiency.Type: GrantFiled: February 15, 1985Date of Patent: June 16, 1987Assignee: Exide Electronics CorporationInventors: William J. Raddi, Robert W. Johnson, Jr., John G. Tracy, Blazej W. Sonnenberg
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Patent number: 4255746Abstract: A home safety unit having an emergency light system for providing light in the event of a power failure or the detection of a fire condition, and a fire detection system for providing an alarm indicating the existence of a fire. The safety unit is designed to have an aesthetically pleasing appearance and to be installed inconspicuously between the base of an existing light fixture and a wall or ceiling. Installation of the safety unit is a simple process, whether installing it when constructing a new building or by retro-fitting it into an existing building.A modified light switch having parallel impedance across the light switch terminals is installed to provide continuous power to the safety unit when the switch is in its off position. Also included is a low voltage dropout system for disconnecting the auxiliary lights when the battery voltage falls below a certain level and for providing an audible alarm indicating this low voltage condition.Type: GrantFiled: November 21, 1977Date of Patent: March 10, 1981Assignee: ESB Inc.Inventors: Robert W. Johnson, William J. Raddi
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Patent number: 4199754Abstract: A circuit for a home safety unit having an emergency light system for providing light in the event of a power failure or when a fire is detected, and a fire detection system for providing an audible alarm indicating the existence of a fire. The circuit includes a battery which is constantly being charged and a low voltage responsive system for indicating a low voltage condition on the battery. A latching system causes the emergency light to be turned off when this low voltage condition is reached, and to remain off until the battery is recharged.Type: GrantFiled: November 21, 1977Date of Patent: April 22, 1980Assignee: ESB IncorporatedInventors: Robert W. Johnson, William J. Raddi