Patent application number | Description | Published |
20090128154 | ULTRA LOW OUTPUT IMPEDANCE RF POWER AMPLIFIER FOR PARALLEL EXCITATION - An ultra low output impedance RF power amplifier for driving a multiple transmit coil Magnetic Resonance Imaging (MRI) system is described, comprising an output matching network with high power MOSFET operatively coupled to at least one transmit coil in the MRI system for a desired output power and impedance. This invention also describes a method for achieving decoupling using the RF power amplifier to drive at least one transmit coil. | 05-21-2009 |
20090159460 | ELECTRODIALYSIS DEVICE AND PROCESS - A device includes a first electrode and a second electrode spaced from the first electrode to define a volume. An anion exchange membrane and a cation exchange membrane are disposed within the volume. A controller controls a supply of electrical current from an electrical source to the first electrode and to the second electrode. The electrical current supply is controlled to switch from a first mode of operation to a second mode of operation providing electrical current having a reverse polarity during each cycle. The electrical current is supplied at a controlled cycle rate and for a controlled duration. The cycle rate is greater than about 100 hertz and less than about 10 kilohertz. | 06-25-2009 |
20100141168 | CLASS-E AMPLIFIER AND LIGHTING BALLAST USING THE AMPLIFIER - An amplifier comprises a power source, a load network comprising a load and a resonance circuit, an input branch having a first end electrically coupled to the power source and a second end electrically coupled to the load network, and an active switch having one terminal electrically coupled to the second end of the input branch. The input branch including at least one parallel-LC-circuit configured to provide an infinitely large impedance at harmonics of a determined order. | 06-10-2010 |
20100301985 | HIGH-VOLTAGE POWER GENERATION SYSTEM AND PACKAGE - A power generation system comprises a power source, a transformer module for converting a low voltage from the power source into a higher voltage, and a voltage-multiplier module for amplifying higher voltage from the transformer module. The transformer module comprises a number N of transformer units. Each transformer unit comprises at least one transformer, and each transformer comprises a magnetic core, a primary winding, and a secondary winding. Primary windings of the transformers in the transformer module are electrically coupled in parallel to the power source, secondary windings of the transformers of each transformer unit comprise a pair of output terminal, and N is equal to or greater than two. The voltage-multiplier module comprises the number N of multipliers. Each multiplier module comprises a positive and a negative input terminal, and a positive and a negative output terminal. Positive and negative terminals of each multiplier are electrically coupled to the positive and negative output terminals of a corresponding transformer unit, and positive and negative output terminals of the multipliers are connected in series. | 12-02-2010 |
20110073487 | ELECTROCHEMICAL DESALINATION SYSTEM AND METHOD - An electrochemical desalination system includes a first and a second electrochemical device and a controller. The first and second electrochemical devices each comprises a electrochemical desalination module comprising at least one pair of electrodes and a compartment between each pair of electrodes for receiving an electrolyte solution. Each of the first and second electrochemical desalination devices comprises a plurality of successive operation cycles. Each cycle comprises a charging mode of operation for charging each pair of electrodes and for adsorbing ions in the electrolyte solution on the electrodes, and a discharging mode of operation for discharging the pair of electrodes and for desorbing ions from the pair of electrodes. The controller is configured to control the system that the first and second electrochemical desalination devices have interleaved charging and discharging modes of operation. One of the first and second electrochemical desalination devices is in a discharging mode and the at least one pair of electrodes release electrical current, while the other of the first and second electrochemical desalination devices is in a charging mode of operation and receives the electrical current released from said one of the first and second electrochemical desalination device. | 03-31-2011 |
20130119882 | SYSTEM AND METHOD FOR DRIVING LIGHT EMITTING DIODES - A system having an alternating current (AC) driven LED unit, an AC voltage regulator, and a controller is provided. The AC driven LED unit includes a first LED and a second LED coupled in reverse parallel. The AC voltage regulator is operable to receive AC voltage originating from an AC voltage source, regulate the AC voltage according to control signals from the controller, and apply regulated AC voltage to the AC driven LED unit, so as to enable the first LED and the second LED to emit light according to the regulated AC voltage. In addition, a method is provided for driving the LED by regulating the AC voltage. By regulating the AC voltage using the AC voltage regulator, benefits of restraining voltage fluctuations, reducing THD, improving power factor, providing dimming control, and mitigating flicker phenomenon can be achieved. | 05-16-2013 |
20130128632 | NEUTRAL POINT CLAMPED CONVERTER CONTROL SYSTEM AND CONTROL METHOD AND COMPENSATION UNIT - A control system includes a fundamental control unit, first and second compensation control units, a switch control unit, and a switch implementation unit. The fundamental control unit generates fundamental commands to implement fundamental power conversion operation for a converter. The first compensation control unit generates a first compensation signal for injection into the fundamental command to balance neutral point voltage when the converter is in operation in a first state. The second compensation control unit generates a second compensation signal for injection into the fundamental command to balance neutral point voltage when the converter is in operation in a second state. The switch control unit detects first and second states of the converter and provides first and second switch signals respectively. The switch implementation unit switches the fundamental control unit to communicate with the first and second compensation control units according to the first and second switch signals respectively. | 05-23-2013 |
20130134710 | SYSTEM AND METHOD FOR CONVERTER SWITCHING FREQUENCY CONTROL - A system for power conversion includes a power converter having switching elements, a detector, and a controller is provided. The detector detects a parameter and provides electrical signals indicative of the parameter. The controller receives the electrical signals transmitted from the detector, and sends commands to instruct the power converter to perform power conversion by operating the switching elements in accordance with switching signals at a different frequency in response to a detection of the system condition. A method for operating the system is also provided. | 05-30-2013 |
20130270116 | SYSTEM AND METHOD FOR POWER CHARGING OR DISCHARGING - A system comprising a plurality of stacks and a plurality of converters, each of the plurality of converters is operable to charge a corresponding stack for adsorbing ions in a liquid, wherein when one of the plurality of stacks is charged or discharged at a first state, one of the plurality of converters associating with the stack operates in a first mode, and is configured to indirectly convert a first voltage to a second voltage at least by an intermediate stage, one of the plurality of stacks is charged or discharged at a second state, one of the plurality of converters associating with the stack operates in a second mode, and is configured to directly convert the first voltage to the second voltage. | 10-17-2013 |
20150062984 | POWER CONVERSION CIRCUIT AND POWER CONVERSION SYSTEM - A power converter, includes a first terminal and a second terminal which are connected to a direct current; a third terminal connected to an alternating current; N multi-level bridge arms connected in parallel to the first terminal and the second terminal, where the N multi-level bridge arms work in a parallel-interleaved manner, each multi-level bridge arm of the N multi-level bridge arms includes an alternating current node, and multiple time-varying levels are generated at the alternating current node, where the multiple levels are more than two levels; and a coupling inductor, including N windings coupled by one common magnetic core, where one end of each winding of the N windings is connected to an alternating current node of one multi-level bridge arm of the N multi-level bridge arms, and the other end of each winding of the N windings is connected to the third terminal. | 03-05-2015 |
20150085541 | MULTI-LEVEL INVERTER AND POWER SUPPLY SYSTEM - A multi-level inverter includes two N-level inverter units with pulse width modulation waves staggered by a phase of 180 degrees, and N is an integer greater than or equal to 3; a direct current power source module, where an output end thereof is connected to input ends of the two N-level inverter units; a transformer, where the transformer includes a primary side and a secondary side, an inductor of the primary side and an inductor of the secondary side are coupled, and one end of the inductor of the primary side and one end of the inductor of the secondary side are connected to output ends of the two N-level inverter units respectively. The two N-level inverter units are reversely coupled, and the other end of the inductor of the primary side and the other end of the inductor of the secondary side are connected. | 03-26-2015 |
Patent application number | Description | Published |
20100204984 | VIRTUAL PET SYSTEM, METHOD AND APPARATUS FOR VIRTUAL PET CHATTING - A virtual pet system includes: a virtual pet client, adapted to receive a sentence in natural language and send the sentence to a Q&A server; the Q&A server, adapted to receive the sentence, process the sentence through natural language comprehension, generate an answer in natural language based on a result of natural language comprehension and reasoning knowledge, and send the answer in natural language to the virtual pet client. A method for virtual pet chatting includes: receiving a sentence in natural language, perform natural language comprehension for the sentence, and generating an answer in natural language based on a result of natural language comprehension and reasoning knowledge. A Q&A server includes: a sentence comprehension engine unit, adapted to process a received sentence in natural language through natural language comprehension, and send a result of natural language comprehension to a reasoning engine unit; the reasoning engine unit, adapted to generate an answer in natural language based on reasoning knowledge and the result of natural language comprehension, and send the answer in natural language; a knowledge base, adapted to store the reasoning knowledge. | 08-12-2010 |
20140152413 | Coupled Inductor Structure - An embodiment apparatus comprises a magnetic core comprising a first side and a second side opposite the first side, a first winding comprising a first portion wound around the first side and a second portion wound around the second side, a second winding comprising a third portion wound around the first side and a fourth portion wound around the second side, wherein the second portion and the fourth portion are coupled to each other. | 06-05-2014 |
20140326042 | SAMPLING PUMPS AND GAS ANALYZERS - Provided are sampling pumps and gas analyzers using the sampling pumps. The sampling pump may include at least one reciprocating pump set and a control system. Each reciprocating pump set can include two reciprocating pumps. The control system can output drive signals for controlling reciprocating drawing and compressing operations of the reciprocating pumps, where the control system may be designed to output the drive signals that cause the two reciprocating pumps within the same set to provide opposing impact directions at the same time. | 11-06-2014 |
20140338669 | AIR CIRCUIT ADAPTER - The invention discloses an air circuit adapter that includes an external conduit, an air collector and an internal conduit. The external conduit includes a first interface and a second interface. An exterior surface of the external conduit includes a sampling interface. The interior conduit can affix inside the external conduit. The air collector can be connected with the sampling interface by a sampling air routing. The sampling air path can radially pass through the internal conduit and the external conduit. | 11-20-2014 |
Patent application number | Description | Published |
20100106789 | Chatting System, Method And Apparatus For Virtual Pet - Embodiments of the present invention provides a chatting system for a virtual pet, including a pet client, configured to receive a natural language sentence of a pet master, and send the natural language sentence to a virtual pet server; the virtual pet server, configured to forward the natural language sentence to a questioning and answering server, and return a natural language response to the pet client; the questioning and answering server, configured to perform processing of natural language understanding on the natural language sentence, obtain language characteristics of the pet master, generate the natural language response according to a natural language understanding result and the language characteristics of the pet master, and return the natural language response to the virtual pet server. Embodiments of the present invention further provide a chatting method for a virtual pet and a questioning and answering server. | 04-29-2010 |
20100153095 | Virtual Pet Chatting System, Method, and Virtual Pet Question and Answer Server - A virtual pet chatting system includes a virtual pet client unit, a virtual pet data maintaining unit as well as a questioning and answering unit. A virtual pet chatting method includes: sending, by a first virtual pet, a natural language question to a second virtual pet; and generating, by the second virtual pet, a natural language response sentence according to the natural language question, after understanding the natural language and performing reasoning taking into account attributes of a virtual pet. A virtual pet questioning and answering server includes a natural language understanding module and a response sentence generating module. | 06-17-2010 |