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| Number | Title | Issue Date |
| 7961486 | Capacitive power supply system The invention relates to a power supply system (3) intended to supply power to an electrical load (C), the system comprising: two input terminals, namely a negative terminal and a positive terminal, connected to a supply mai... | 06/14/2011 |
| 7420827 | Self oscillating inrush current limiting converter There is disclosed a power converter having limited inrush current and an inrush current limiter circuit. The inrush limiting circuit may be a self-oscillating switching-mode average current regulator tp provide a relatively constant average charging current to a bu... | 09/02/2008 |
| 7411378 | Power factor controller that computes currents without measuring them A power factor controller for a switching power supply, that in one embodiment couples a power factor control circuit between an AC input and an output wherein a digital controller computes circuit currents for regulating the power supply without direct current meas... | 08/12/2008 |
| RE40320 | Permanent magnet alternator and voltage regulator circuit for the permanent magnet alternator A permanent magnet alternator including a stationary stator including a plurality of spaced stator poles projecting inwardly from the stator, a winding circuit wound through the spaces between the stator poles, a rotor assembly mounted for rotation within the stator... | 05/20/2008 |
| 7362598 | Synchronous rectifier gate drive shutdown circuit A power converter that includes a transformer, a bridge input circuit, a self-driven synchronous rectifier circuit, a gate drive circuit, and a gate drive shutdown circuit. The transformer includes a primary winding connected to the bridge input circuit, a first sec... | 04/22/2008 |
| 7294976 | Split power supply subsystem with isolated voltage supplies to satisfy a predetermined power limit A power subsystem including a mechanism for satisfying a predetermined power limit in a computer system. The power subsystem may include a split power supply and a voltage regulator. The split power supply may include at least a first voltage supply line and a secon... | 11/13/2007 |
| 7292377 | Image processing apparatus capable of reducing power consumption while connected to an external device A power control circuit (120) is driven by electric power supplied from a controller (200) as an external device via a cable (150), and controls opening/closure of a switch (104) in accordance with instructions from the controller (200... | 11/06/2007 |
| 7254048 | Power supply capable of AC and DC input utilizing winding of transformer as boost inductor A programmable AC/DC power converter receives a plurality of input voltages and outputs a single voltage from an input voltage system. A transformer receives the single voltage. One of the plurality of input voltages is provided at a center tap of a secondary windin... | 08/07/2007 |
| 7230838 | Active damping control for a switch mode power supply Methods and apparatus are disclosed for suppressing circuit noise due to parasitic elements in switch mode power supplies. The presented embodiments use actively controlled damping devices such as controllable resistors, current sources, and tri-state power devices ... | 06/12/2007 |
| 7199562 | Line frequency switching regulator In a switch mode power supply, a mains supply voltage source is coupled to a rectifier for producing an input supply voltage. The rectified input supply voltage is coupled unfiltered to an input of the SMPS. A switching power transistor having a controllable duty cy... | 04/03/2007 |
| 7196918 | Capacitive drop power supply with low power consumption An improved capacitive drop power supply is provided for use in home appliances. The power supply circuit includes: a rectifier for converting an AC power source to a DC voltage; a current limiting capacitance interposed between the AC power source and the rectifier... | 03/27/2007 |
| 7148659 | Programmable AC/DC power supply A programmable AC/DC power converter receives a plurality of input voltages and outputs a single voltage from an input voltage system. A transformer receives the single voltage. One of the plurality of input voltages is provided at a center tap of a secondary windin... | 12/12/2006 |
| 7112897 | Capacitor and switch components cooperation to maintain input voltage to target circuit at or above cut-off voltage until power circuit is able to maintain the input voltage An apparatus in one example comprises a first capacitor component, a second capacitor component, and a switch component. The first capacitor component, the second capacitor component, and the switch component cooperate to maintain an input voltage to a target circui... | 09/26/2006 |
| 7088596 | Switching power supply with novel common mode filter arrangement The present invention is to provide a switching power supply device for preventing the change of characteristic of the line filter due to filler such as resin which covers the circuits. A switching power supply device is disclosed which comprise a rectifier 1... | 08/08/2006 |
| 7075805 | Voltage converter with current limiting portion A voltage converter includes two input terminals, at least a current limiting portion, an electronic switch in the form of a transistor controlled by a control device in synchronization with the supply voltage, and a storage capacitor. Two output terminals taken fro... | 07/11/2006 |
| 7016468 | X-ray tube preheat control A current feedback circuit in a dental imaging apparatus, which measures the x-ray tube current produced by the x-ray filament. During preheat, when the tube current is sensed to be appropriate for production of a constant rate of electrons, preheat is stopped, and ... | 03/21/2006 |
| 7012825 | Combined AC-DC to DC converter The invention relates to a combined AC-DC to DC converter. The converter provides the option of coupling to an AC supply source with at least one phase and the further option of coupling to at least one DC supply source. The converter obtains supply from at least on... | 03/14/2006 |
| 6987678 | Switching voltage regulator for switch mode power supply with planar transformer A power supply has an output circuit for a secondary stage of a converter that switches on and off a switching device such that the output voltage of the converter is regulated across a capacitor without use of an inductor in the output circuit. For example, the swi... | 01/17/2006 |
| 6975098 | Factorized power architecture with point of load sine amplitude converters A Factorized Power Architecture (“FPA”) method and apparatus for supplying power to highly transient loads such as microprocessors includes a front end power regulator (“PRM) which provides a controlled DC bus voltage which is converted to the desired load vol... | 12/13/2005 |
| 6967559 | Transformer for high-voltage X-ray generator A power supply for a device which has a load, comprising a first resonant generator and a second resonant generator, coupled in parallel, each generator having a phase output. The power supply further comprises a control circuit coupled to the first and second gener... | 11/22/2005 |
| 6933626 | Ferroelectric transformer-free uninterruptible power supply (UPS) systems and methods for communications signal distribution systems Uninterruptible Power Supply (UPS) systems and methods for a communications signal distribution system, such as a cable television (CATV) signal distribution system that distributes a communication signal and an Alternating Current (AC) power over a coaxial cable ha... | 08/23/2005 |
| 6927751 | Plasma display apparatus having a driver protecting portion A plasma display apparatus which can surely prevent an overcurrent flowing in a driver for driving electrodes of a plasma display panel. A power source is shut off when an internal short-circuit state of a column electrode driver is detected based on a current or an... | 08/09/2005 |
| 6856526 | Power system with phased controlled inrush limiter A phase controlled drive circuit includes a drive circuit operable to provide gate signals to an SCR bridge circuit and a phase control circuit. The phase control circuit includes a first phase generator operable to generate a first phase signal, and a second phase ... | 02/15/2005 |
| 6690145 | Permanent magnet alternator and voltage regulator circuit for the permanent magnet alternator A permanent magnet alternator including a stationary stator including a plurality of spaced stator poles projecting inwardly from the stator, a winding circuit wound through the spaces between the stator poles, a rotor assembly mounted for rotation within... | 02/10/2004 |
| 6465992 | Preconditioner generating feedback signal having reduced ripple A preconditioner comprises a rectifier, a switch mode power supply, and a feedback path for feedback of a preconditioner output voltage to a control block. The rectifier is arranged to receive an AC voltage from a voltage supply and to rectify the AC volt... | 10/15/2002 |
| 6434029 | Boost topology having an auxiliary winding on the snubber inductor A boost converter topology is disclosed that includes a resonant network comprising a snubber inductive element having a primary winding connected in series to a first resonant diode that is connected, at a first node, to two series connected additional r... | 08/13/2002 |
| 6388906 | Backslope regulator system A regulator system includes a circuit regulating the output of a power supply such as a capacitive input filter power supply and preferably also a transformer and full-wave diode bridge. Included are a ramp generator, a zero crossing detector synchronizin... | 05/14/2002 |
| 6337802 | Device for energizing a voltage-source converter A voltage-source converter is connected on its ac-voltage side to a three-phase electric power network via a transformer and on its dc-voltage side to capacitor equipment. The transformer has on its secondary side a first, a second, and a third phase wind... | 01/08/2002 |
| 6297979 | In-rush current controller with continuous cycle-by-cycle control An in-rush current controller for a mains power rectification circuit including a fill wave rectifier and a capacitor. A serial resistor suppresses in-rush currents. The controller includes a sensing circuit that controls a pair of silicon controlled rect... | 10/02/2001 |
| 6288918 | Switched power converter with hold-up time and harmonics reduction Switched power converter with hold-up time and harmonics reduction connected to an AC power mains through a first rectifier means (13) and connected to conversion means (19) supplying a regulated voltage. An energy storage means (16) connected in parallel with... | 09/11/2001 |
| 6269012 | Energy efficient power supply with light-load detection An output voltage of a rectification smoothing circuit is compared with a reference voltage. When a reduction in the output has been detected, an A/D converting circuit converts a result of the comparison which is negatively fed back by an output voltage ... | 07/31/2001 |
| 6246218 | Method and control device for stabilizing a power supply network In a method for stabilizing a power supply network against fluctuations of the reactive power of an electrical system, in particular of an arc furnace (5), having at least one transformer (3), the at least one transformer (3) is switched on and off on the... | 06/12/2001 |
| 6205041 | Power supply for electronic thermostat A power supply circuit for an electronic thermostat includes a half wave rectifier, at least one voltage dropping resistor and a gated rectifier. The gated rectifier preferably conducts only when the voltage at its output drops below the voltage at its ga... | 03/20/2001 |
| 6072708 | Phase controlled switching regulator power supply A switching regulator device for charging applications includes a transformer (18) which receives an AC input signal from an AC source (12) which is then rectified with a bridge rectifier (24). A regulation control circuit (26) is provided for regulating ... | 06/06/2000 |
| 6023419 | Capacitor regulated controllable voltage and current power supply The active capacitor regulating type controllable voltage and current power supply circuit is disclosed with a voltage reducing and current limiting rectifying circuit which is constituted by capacitors and a bridge type current rectifier device, wherein ... | 02/08/2000 |
| 6014324 | Voltage regulator for a permanent magnet alternator A voltage regulator (12) for controlling and limiting the output voltage of an alternator (10) includes a control circuit having a full wave rectifier (28) for impressing a series of half wave pulses (32) onto a first circuit (34) in correspondence to the... | 01/11/2000 |
| 5838555 | Two-wire power supply electronic switch A two-wire power supply switch connected in series with a load between two poles of an alternating current mains electrical power supply conventionally includes a main triac between two terminals of the switch which is turned on by the conduction of an op... | 11/17/1998 |
| 5818704 | Synchronizing/driving circuit for a forward synchronous rectifier An isolated forward switching power converter includes a primary side circuit and a secondary side circuit having an output inductor, a first MOS gated transistor coupled in series with the output inductor, a second MOS gated transistor coupled in shunt r... | 10/06/1998 |
| 5812386 | Power supply control method and corresponding circuit A power supply control circuit generates DC power output intermittently at predetermined intervals during a power saving mode of operation, so as to save power. The power supply control circuit includes an AC power circuit for receiving AC power and for o... | 09/22/1998 |
| 5745357 | Regulator circuit and multi-output switching power unit using the regulator circuit A multi-output switching power unit which can substantially prevent an output power supply of an auxiliary output power circuit from dropping significantly when a load a is light and which has a reduced loss in the output path. A voltage up capacitor 20, ... | 04/28/1998 |
