Class / Patent application number | Description | Number of patent applications / Date published |
323305000 | Using a transformer or inductor as the final control device | 19 |
20090051340 | LINEAR TRANSCONDUCTOR FOR A ONE-CYCLE CONTROLLER, NOTABLY FOR A DC-DC SWITCHING CONVERTER - A linear transconductor (LT), for instance for a one-cycle controller (OC), comprises i) an operational amplifier (OA) having non-inverting (+) and inverting (−) inputs, a power supply input intended to be connected to a DC voltage (V | 02-26-2009 |
20090160417 | Current limiting device for plasma power supply - The current (I | 06-25-2009 |
20090243581 | ELECTRICAL OUTLET DEVICE - An electrical outlet device is provided, the device operable to produce a step-down voltage to an electrically powered system. The electrical outlet device can include a housing, a power inlet electrical plug that extends from the housing and at least one power outlet electrical socket that is connected in parallel to the power inlet electrical plug. A load is also included within the housing and connected in parallel to the at least one power outlet socket, the load providing a step-down voltage. Also included can be a pair of power outlet electrical contacts that extend from the load, the pair of electrical contacts being connected to the load and providing the step-down voltage to the electrically powered system. | 10-01-2009 |
20100019752 | SYSTEM AND METHOD FOR ENABLING POWER APPLICATIONS OVER A SINGLE COMMUNICATION WIRE PAIR - A system and method for enabling power applications over a single communication wire pair. In one embodiment, a data transformer is provided that has three separate windings. Two of the windings are tied to each other via high frequency pass DC-blocking capacitors, or another suitable element that creates an AC path while providing a DC block, such that the voltage forms on either ends of the DC-blocking capacitors and the signal is sent on the outer legs of each winding. A circuit measures the current draw (I) and injects a current proportional to, but smaller than, I into a third bias cancellation winding. | 01-28-2010 |
20100033156 | NON-CONTACT POWER FEEDER - [Problems] To provide a non-contact power feeder that is high efficient and high power factor and has no load dependence. | 02-11-2010 |
20100066340 | Non-Contact Rotary Power Transfer System - A power delivery system includes a rotary transformer having a primary winding and a secondary winding and configured to transfer power between stationary coupling elements on a stationary side and rotational coupling elements on a rotational side. The rotational coupling elements share a central axis with the stationary coupling elements, and are adapted to rotate with respect to the stationary coupling elements. The power delivery system includes an isolation transformer that drives the primary winding of the rotary transformer, and a plurality of power inverter stages whose outputs are adapted to be summed and coupled to the rotary transformer. A plurality of output power converters receive transmitted power from the rotary transformer. A plurality of control elements, disposed on the rotating side, are configured to close a feedback loop on desired and actual performance of the output power converters, and to control the power inverter stages. | 03-18-2010 |
20100102793 | APPARATUS, SYSTEM, AND METHOD FOR AN INTEGRATED BIAS AND STANDBY POWER SUPPLY CIRCUIT - An apparatus, system, and method are disclosed for efficiently providing bias voltages. A first switching regulator stage that includes an inductor receives an input voltage and provides as an output an intermediate regulated output voltage. A second switching regulator stage receives as input the intermediate regulated output voltage and outputs a regulated main output voltage. The second switching regulator stage includes at least one switch controller that provides one or more signals to one or more switches in the second switching regulator stage to regulate the main output voltage of the second regulator stage. A secondary bias module utilizes a secondary winding coupled with the inductor of the first regulator stage to provide a secondary bias output voltage to the switch controller of the second switching regulator stage. The secondary bias output voltage is referenced to the main output voltage of the second switching regulator stage. | 04-29-2010 |
20100141232 | Power Station for Power Transmission to Remotely Located Load - The invention relates to distribution of electrical power, supervision and security. The invention comprises a power feeding station PFS for delivering electrical power. The PFS comprises a low voltage side LVS, a high voltage side HVS and a transformer TF which is configured to deliver high voltage single phase alternating current on the high voltage side, The power can be distributed, via a cable, to one or more power receiving stations PRS. The cable is configured to distribute current-symmetrical single phase current delivered by the power feeding station. The cable can preferable be a coaxial cable with the shield as current return path. The invention also comprises a current sensor unit CSU which is situated on the high voltage side. The means for measuring characteristics of the current CD can comprise a coil without galvanic contact with the high voltage side. A circuit break unit CBU suitable for breaking the current is situated on the low voltage side. A control function CF is configured to activate the circuit break unit based on the safety rules and the characteristics of the current CD. Characteristics of the current and other system information SI can also be delivered to an information unit IU. | 06-10-2010 |
20100201338 | HYBRID DISTRIBUTION TRANSFORMER WITH AC & DC POWER CAPABILITIES - A hybrid transformer is provided that includes an electromagnetic transformer and an AC-AC converter with a DC bridge. The AC-AC converter is operable to keep the input voltage and current of the hybrid transformer substantially in phase and to reduce fluctuation in the output voltage of the hybrid transformer in the event of an increase or decrease in the input voltage. | 08-12-2010 |
20100237846 | CONTROLLING INLINE POWER AT AT POWERED DEVICE - A powered device includes a first switch, a second switch, and a controller. The first switch is disposed between a center tap of the first transformer and a center tap of the third transformer. The second switch is disposed between a center tap of the second transformer and a center tap of the fourth transformer. The controller is coupled to the first switch and the second switch. The controller is constructed and arranged to output a control signal to the first and second switches to electrically connect the center taps of the first and third transformers together and concurrently electrically connect the center taps of the second and fourth transformers together. The powered device is constructed and arranged to operate in 4-pair mode when the center taps of the first and third transformers are connected together and the center taps of the second and fourth transformers are connected together. | 09-23-2010 |
20110084680 | Transformer based voltage combiner with inductive shunt - In accordance with the invention there is also provided a voltage combiner ( | 04-14-2011 |
20110101951 | Zero-Voltage-Switching Self-Driven Full-Bridge Voltage Regulator - non-isolated full bridge (FB) converters have self-driven synchronous rectifier (SR) MOSFETs in the current doubler rectifier (CDR). The gate terminals of the SR MOSFETs are connected to the bridge leg midpoints of the FB converter. The primary side of the FB converter shares the same ground of the secondary side, which provides the gate drive path for the SRs. The asymmetrical control featuring zero-voltage-switching (ZVS) capability is applied to the two bridge legs of the FB converter respectively. This creates the right gate drive voltage waveforms for the SRs. The energy of the leakage inductance of the transformer is used to achieve SR gate energy recovery. High gate drive voltages can be used to reduce the on-resistance of SRs and the conduction loss. In this way, no additional gate driver circuitry is needed for the SRs compared to the conventional external drive circuitry for SRs. In this invention, the above features provide high conversion efficiency with high switching frequency. This can help to achieve high power density and fast dynamic response accordingly. The invented power circuits are suitable to low voltage and high current application. | 05-05-2011 |
20120056608 | STABILIZING NETWORK FOR ELECTRONIC TRANSFORMER DRIVEN LED DEVICES - A stabilization circuit is provided at an output of an electronic transformer driving circuit having a rectifier fed into a feedback-controlled oscillator circuit that drives an isolation transformer at an output of the electronic transformer driving circuit. The stabilization circuit includes: a current limiting portion that limits an amount of current delivered by the electronic transformer driving circuit. | 03-08-2012 |
20120268098 | POWER CONVERTER WITH HOLD UP - A power converter providing required hold up for a primary converter, particularly a cycloconverter, without the required hold up capacity by an auxiliary converter including storage capacitors having the requisite capacity. The auxiliary converter may be isolated from the primary converter during normal operation and switched in during power supply discontinuities. The storage capacitors may be charged via a voltage step up circuit to achieve improved charge utilization. The storage capacitors may be charged via a charge path independent of the auxiliary converter output path so that the storage capacitor charging rate may be set independently. | 10-25-2012 |
20120274303 | SUBSTATION AUTOMATIC CONTROL SYSTEM - According to one embodiment, there is provided a substation automatic control system. An automatic power adjusting apparatus activates an automatic voltage adjusting apparatus when a phase tap is controlled. The automatic voltage adjusting apparatus activates the automatic power adjusting apparatus when a voltage tap is controlled. The automatic power adjusting apparatus suppresses the effective power on a transmission line to the value smaller than the prescribed value while the automatic voltage adjusting apparatus is performing an automatic control, thereby maintaining transmission-side system voltage within a tolerant system voltage range. | 11-01-2012 |
20140015508 | INDUCTOR THAT SWITCHES BETWEEN COUPLED AND DECOUPLED STATES - An apparatus includes first core spaced from a second core. The second core has a first section with a first winding, a second section with a second winding, and a third section between the first and second sections. At least one filler is included between the first core and the third section of the second core. The operational state of the apparatus changes based on the amount of magnetic flux through the filler. When the flux is at an unsaturated level, the first and second windings operate as decoupled inductors. When the flux is at a saturated level, the first and second windings operate as a coupled inductor. The amount of magnetic flux through the filler may be determined based on the size of the current through one or more of the windings and/or the magnetic permeability of the filler material. | 01-16-2014 |
20150123642 | CURRENT GENERATOR DEVICE AND METHOD OF GENERATING A CURRENT WAVE - Current generator device comprising a processing unit ( | 05-07-2015 |
323306000 | Ferroresonant | 1 |
323308000 | With core having an air gap or magnetic shunt | 1 |
20090033309 | Reconfigurable topology for switching and linear voltage regulators - A configurable voltage regulator ( | 02-05-2009 |
323310000 | Controllably saturable | 1 |
20120153927 | FAULT CURRENT LIMITER WITH SATURATED CORE - A three-phase current limiter ( | 06-21-2012 |