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| Number | Title | Issue Date |
| 7161816 | System and method for input current shaping in a power converter A power converter delivers electrical power from an electrical power source to a load according to a plurality of operation modes corresponding to different levels of input voltage or output current. The power converter comprises a power stage for delivering the ele... | 01/09/2007 |
| 7161818 | High frequency excitation system A power module is adapted to be connected to a voltage source and to supply power to a load. The power module includes a switching bridge that includes a first power transistor and a second power transistor, a first gate controller for driving the first power transi... | 01/09/2007 |
| 7161819 | Zero-crossing correction in sinusoidally commutated motors An apparatus and method for controlling sinusoidal currents in inductive loads during zero-crossing to reduce distortion. The apparatus and method utilizes first and second PWM signals during a single PWM cycle to apply opposite voltage signals to obtain a net desir... | 01/09/2007 |
| 7157886 | Power converter method and apparatus having high input power factor and low harmonic distortion A single stage, single switch, input-output isolated converter configuration which uses a hybrid combination of forward and flyback converters is disclosed. The converter operates at a high input power factor with a regulated DC output voltage. It makes use of a nov... | 01/02/2007 |
| 7158390 | Phase shift full bridge converter A converter is presented, including first and second switches coupled to an input power source to define a first conductive path, and third and fourth switches coupled to the input power source to define a second conductive path. A PWM unit turns on the switches in ... | 01/02/2007 |
| 7158392 | Switching power supply device and the semiconductor integrated circuit for power supply control It is aimed at decreasing losses not only in a synchronous rectifier circuit provided at a secondary side of a DC-DC converter, but also in a full-bridge switching circuit provided at a primary side thereof. The DC-DC converter comprises a transformer for voltage co... | 01/02/2007 |
| 7157887 | Direct amplitude modulation for switch mode power supplies In one aspect, a switch mode power supply comprises a first inductive element; a first switching element, wherein a first end of the first switching element is connected to a second end of the first inductive element; a second inductive element; a second switching e... | 01/02/2007 |
| 7156082 | Controlling spark for an engine with controllable valves A system and method to control spark in a cylinder of a multi-cylinder engine. Spark can be controlled in a cylinder while reducing the possibility of producing a spark at a spark plug coupled to an ignition coil. ... | 01/02/2007 |
| 7158395 | Method and apparatus for tracking maximum power point for inverters, for example, in photovoltaic applications A power system employs an outer voltage feedback loop and an inner current feedback loop to control a power converter, such as a DC to AC inverter for transferring electrical power between a power source, for example a photovoltaic array, and a load, for example a p... | 01/02/2007 |
| 7158389 | Switching power supply circuit A switching power supply circuit having a power factor improving function that makes it possible to improve power conversion efficiency and reduce size and weight of the circuit. A complex resonant converter is formed by at least combining a current resonant convert... | 01/02/2007 |
| 7154763 | Push-pull switching power converter A push-pull switching power converter includes, between high and low output terminals of a DC power source, a series circuit having a first switching device, a primary winding of a first transformer, a primary winding of a second transformer, and a second switching ... | 12/26/2006 |
| 7149098 | Over-power protection apparatus with programmable over-current threshold An over-power protection apparatus with programmable over-current threshold for a power converter is provided. The over-power protection apparatus further provides an over-temperature threshold for protection purposes. The over-power protection apparatus is able to ... | 12/12/2006 |
| 7145786 | Point of load sine amplitude converters and methods In a preferred embodiment, a Sine Amplitude Converter (“SAC”) method and apparatus for VTMs converts a DC input voltage to a DC output voltage using a fixed transformation ratio at a frequency locked to a resonance. The SAC uses a resonant circuit including a tr... | 12/05/2006 |
| 7145293 | Electronic ballast having resonance excitation for generating a transfer voltage The invention relates to an electronic ballast, to an illumination device including the electronic ballast and an associated high-pressure discharge lamp, and to a corresponding operating method for a high-pressure discharge lamp, in which resonance excitation is us... | 12/05/2006 |
| 7141759 | Generator for unitary power factor arc welders A generator for unitary power factor arc welders, comprising a current transformer that supplies, at a secondary winding thereof, a welding arc and is in turn supplied, at a primary winding thereof, by an input leveling and rectifying unit, between the rectifier uni... | 11/28/2006 |
| 7143381 | Resonance reduction arrangements Resonance reduction arrangements to reduce the impact of power supply resonance on circuits, comprising a resonance sensor and a charge dumper, wherein upon the detection of the predetermined resonance by the resonance sensor at a circuit location, the charge dumper... | 11/28/2006 |
| 7142436 | Reliable bi-directional driving circuit for wide supply voltage and output range A bi-directionally load current driving circuit is disclosed. The bi-directionally load current driving circuit comprises a voltage source; a bridge circuit comprising a first switch, a second switch, a third switch, a fourth switch, a first output terminal, and a s... | 11/28/2006 |
| 7140742 | Surface-mount semiconductor lighting apparatus A lighting effects system comprises an arrangement of lamp elements, such as light-emitting diodes (LEDs) or other light elements, on a panel or frame. The panel or frame may be relatively lightweight, and may include one or more circuit boards for direct mounting o... | 11/28/2006 |
| 7141894 | Apparatus for providing high quality power The system disclosed herein is primarily utilized in the 23–48 volt DC telco, data center and industrial production industry. It will effectively replace today's requirement of purchasing, installing, maintaining and replacing chemical storage batteries. The solut... | 11/28/2006 |
| 7142085 | Insulation and integrated heat sink for high frequency, low output voltage toroidal inductors and transformers Toroidal transformer and inductor configurations are described that allow for greater heat transfer away from internal device components. The inventive transformer allows for higher thermal and electrical efficiency, as well as for more efficient use of expensive co... | 11/28/2006 |
| 7138791 | Logic controlled high voltage resonant switching power supply Methods and apparatuses for a low EMI power supply. The power supply may include a control circuit, a power switch connected to the control circuit, an anti-parallel diode connected to the power switch, an inductor coupled to the anti-parallel diode, an output diode... | 11/21/2006 |
| 7138614 | Non-contact feeder system A non-contact feeder system to supply an induced current to an electrical load includes at least three feeding cables arranged approximately parallel with one another along a moving direction of the electrical load; a plurality of AC power supplies to supply AC curr... | 11/21/2006 |
| 7136293 | Full wave series resonant type DC to DC power converter with integrated magnetics A full wave DC/DC converter magnetically integrates into the transformer assembly the functions of the resonant inductor, magnetizing inductor and the output filter inductor. The primary and the secondary windings are assembled on a gapped center leg of an E-core, w... | 11/14/2006 |
| 7136294 | Soft switched zero voltage transition full bridge converter A soft switched zero voltage transition full bridge converter for reducing power loss at very light loads for zero voltage switching (ZVS) converters operating at high frequency. The converter has four switches in two switching legs, each having two switches connect... | 11/14/2006 |
| 7136269 | Inverted circuit overcurrent protection device and hybrid integrated circuit device with the same incorporated An inverter circuit overcurrent protection device in which an overcurrent detection resistor (Rs) is incorporated in a hybrid integrated circuit, in which a detection voltage from the overcurrent detection resistor (Rs) is divided by voltage dividing resistors (R | 11/14/2006 |
| 7136270 | Surge protector including data pass-through A surge suppressor includes a high-pass filter configured to pass signals in the range suitable for use in a powerline network. ... | 11/14/2006 |
| 7133300 | Over-voltage protection circuit for power converter The present invention proposes an over-voltage protection apparatus for a power converter. The over-voltage protection apparatus has an oscillator outputting a clock signal. Simultaneously, by comparing a sense signal with a threshold signal, an over-voltage compara... | 11/07/2006 |
| 7133298 | High frequency voltage regulating transformer based converter A switching regulator and method of fabricating a switching regulator is disclosed. In one embodiment a switching regulator comprises a transformer having a primary winding and a secondary winding, an inductor (L) connected to an input of the primary winding, and a ... | 11/07/2006 |
| 7129872 | Audio signal analog-to-digital converter utilizing a transformed-based input circuit An apparatus for converting an input analog audio signal into digital form including an analog-to-digital converter. An amplifier circuit and step-down transformer provide an interface for the input analog audio signal to the analog-to-digital converter. The step-do... | 10/31/2006 |
| 7126304 | Motor controller and electric power steering apparatus A microcomputer includes a rotation angular velocity computation section, a feedback gain determination section, and a dead time compensation amount determination section. The rotation angular velocity determination section computes the rotation angular velocity of ... | 10/24/2006 |
| 7123099 | Two-stage amplifier with series L-R coupling network A two-stage amplifier that includes a first stage and a second stage and a first component and a second component coupled in series between the first and second stages. The first component is selected to provide AC decoupling of the first and second stages and the s... | 10/17/2006 |
| 7123490 | Synchronous rectifying switching power source circuit In a synchronous rectification switching power supply circuit, a primary winding of a transformer and a main switching device are serially connected to a direct current input power supply. A secondary winding and a synchronous rectification device on the secondary s... | 10/17/2006 |
| 7123123 | High-frequency power transformer A high-frequency transformer. The transformer comprises a high-voltage winding. A first bus bar is positioned proximate the high voltage winding and extends to a first portion of a plurality of power switching devices. The first bus bar is electrically coupled to th... | 10/17/2006 |
| 7119496 | Inverter for liquid crystal display, and power supply arrangement comprising such an inverter A power supply arrangement is provided for supplying power to a plurality of back and/or edge illumination devices (5) in a liquid crystal display unit (1), comprising a mains connection (7), a power converter (6) and at least one inverte... | 10/10/2006 |
| 7119454 | System and method for powering accessories in a hybrid vehicle A system and method for providing power to vehicle accessories having operational power requirements in excess of 1 kilowatt. The system is employed in conjunction with a vehicle comprising a main power unit and an electric motor, the main power unit providing more ... | 10/10/2006 |
| 7120036 | Switching-mode power supply having a synchronous rectifier A DC-to-DC converter incorporates a transformer having a primary winding connected to a pair of DC input terminals via an active switch, which turns on and off under the control of a feedback circuit, and a secondary winding connected to a pair of DC output terminal... | 10/10/2006 |
| 7116012 | Stable power conversion circuits A power conversion circuit includes a current section, a transformer, and a voltage section. The current section includes inductors configured to produce a boosted output voltage from a voltage sourse when then current section is operating in a forward direction. Th... | 10/03/2006 |
| 7116238 | Electronic apparatus and fan module replacing method An electronic apparatus capable of replacing a fan module during operation, includes a unit for instructing a replacement of a fan module, and a unit for controlling a fan drive voltage not to be supplied to a fan module to be replaced when the replacement is instru... | 10/03/2006 |
| 7116568 | Series connected buck-boost regulator A Series Connected Buck-Boost Regulator (SCBBR) that switches only a fraction of the input power, resulting in relatively high efficiencies. The SCBBR has multiple operating modes including a buck, a boost, and a current limiting mode, so that an output voltage of t... | 10/03/2006 |
| 7112943 | Enabling circuit for avoiding negative voltage transients An enabling circuit for enabling a DC—DC converter having a capacitor coupled to an output terminal of the DC—DC converter to be controlled by a control signal. The enabling circuit may include a comparison circuit configured to compare a feedback signal represe... | 09/26/2006 |
