Inventors list |
Assignees list |
Classification tree browser |
Top 100 Inventors |
Top 100 Assignees |
Chunhui Zhu
Chunhui Zhu, Guangdong Province CN
| Patent application number | Description | Published |
|---|---|---|
| 20090218994 | Resonance DC/DC Converter and Control Method Thereof - The present invention refers to a method for controlling a resonance DC/DC converter, which adjusts an output voltage by changing a turn-on frequency of input switch devices of a resonance circuit of the converter, and extends the range of the output voltage of the resonance circuit by adjusting the duty ratio of the switch devices based on the feedback signal of the load circuit. The present invention also provides the resonance DC/DC converter structure using the controlling method. The advantage of the present invention lies in the use of two modes of frequency modulation and frequency modulation plus pulse width modulation to control the resonance DC/DC converter; the use of the frequency modulation controlling mode when the operating frequency of the power supply is low, and introducing the frequency modulation plus pulse width modulation controlling mode when the operating frequency of the power supply is too high. As a result, the problem of the resonance converter, that is, the high operating frequency and the big loss of the circuit when the circuit operates at a light load and non-load, can be solved, and thus the regulation ability for the output voltage of the resonance circuit is enormously improved, and the output range of the voltage is effectively expanded. | 09-03-2009 |
| 20110103340 | Method and System for Realizing Network Switching, and a Mobile Node - A method and system for realizing network switching, and a mobile node are provided. The method comprises: a Local Mobility Anchor receives a Proxy Binding Update message from a second mobile access gateway, wherein the Proxy Binding Update message carries identifier information of the mobile node, the IP address of a first interface, and the IP address of the second mobile access gateway (S | 05-05-2011 |
Chunhui Zhu, Shenzhen CN
| Patent application number | Description | Published |
|---|---|---|
| 20110009160 | Method And Apparatus For Discovering A Home Link In Mobile IP - The present invention provides a method and apparatus for discovering a home link in mobile IP, wherein the method includes: an access network assigns an address for a UE when the UE is attached to the network; the UE acquires a home address from the network; the UE compares the address assigned by the access network with the home address, and confirms that the UE is attached to the home link in the case that the address assigned by the access network and the home address are the same. Therefore, with the present invention, it is not necessary to configure the UE in advance, and the participation of the user is also not required. Thus improved application flexibility is provided. | 01-13-2011 |
Chunhui Zhu, San Jose, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20090161594 | HYBRID MULTICAST ROUTING PROTOCOL FOR WIRELESS MESH NETWORKS - A method of multicast routing in a wireless mesh network is provided. One implementation involves maintaining a multicast logical tree having a structure establishing parent-child connectivity relationships between wireless station nodes, wherein each node has access to local connectivity information for its local nodes; and a wireless station node joining a multicast group in the network and becoming the group coordinator. Each multicast group member may join and leave the group at any time utilizing both tree structure and local link state information. | 06-25-2009 |
| 20100142423 | METHOD AND SYSTEM OF RADIO FREQUENCY (RF) POWER TRANSMISSION IN A WIRELESS NETWORK - A method and system of radio frequency (RF) power transmission among multiple wireless stations is provided. Control signals for switching a receiving station between a power reception mode and a data reception mode are generated. The control signals provide switching information about which of the modes to switch to, and timing of the switching. In the data reception mode, the receiving station processes an RF transmission from a sending station as a data communication. In the power reception mode the receiving station processes the RF transmission as energy radiation for powering the receiving station. One type of control signal for power mode switching is generated at the MAC layer of a receiving station and sent to the PHY layer of that station for power mode switching. Another type is RTS/CTS control signal exchanged between the sending and receiving stations. | 06-10-2010 |
| 20100142509 | METHOD AND SYSTEM FOR INTEGRATED WIRELESS POWER AND DATA COMMUNICATION - A method and system of integrated wireless power and data transmission in a wireless device having a data communication circuit for wireless data communication and a power reception circuit including a charge storage unit. The wireless device is tuned to receive wireless RF signals in a certain frequency band via an antenna. Switching between power reception mode and data communication mode is detected. Received RF signal electrical charge is selectively distributed to the power reception circuit and/or the data communication circuit based on the switching mode and/or strength of the RF signal. | 06-10-2010 |
Chunhui Zhu, Guangdong CN
| Patent application number | Description | Published |
|---|---|---|
| 20090174977 | HARDWARE OVERVOLTAGE DISCONNECTING CIRCUIT - The invention relates to a voltage detection control technology, especially relate to a hardware overvoltage disconnecting circuit wherein a DC power supply module is disconnected from a power network when the AC power network is in the state of overvoltage. The hardware overvoltage disconnecting circuit comprises a disconnecting relay and a voltage detection circuit. The disconnecting relay is connected in series between an AC power network and a power factor correction circuit of a power supply module. A first sampling terminal of the voltage detection circuit samples the voltage of the AC power network between the AC power network and the disconnecting relay, and an output of the voltage detection circuit is connected to a control terminal of the disconnecting relay. When the AC power network is in the state of overvoltage, the disconnecting relay is disconnected and the power supply module is disconnected from the AC power network. When the voltage of the AC power network is normal, the disconnecting relay is connected. The circuit of the present invention is started up before the busbar voltage reaches its extreme value, and the relay can still work even if only the auxiliary power supply is working among all the components of the power supply module. The auxiliary power supply of the module is still in the work state. The cost of the system is reduced. | 07-09-2009 |
| 20090303750 | METHOD AND SYSTEM OF SYNTONIC CIRCUIT MODULATION CONTROLLING - A modulation control method and system for a resonance circuit that generally relate to electrical communication technique. In the system, a controlling chip of the resonance circuit is connected to associated controlling means providing voltage matching and resistance control. The controlling means provides controlling parameters to the chip in accordance with input voltage. The controlling chip modulates the resonance circuit accordingly. A phase-shifting pulse width modulation controlling chip or a pulse width modulation controlling chip is connected to a voltage matching module and a resistance controlling module, wherein the voltage matching module matches the voltage ranges and the resistance controlling module adjusts the equivalent resistance of RT terminal to the external as the voltage of loop circuit changes accordingly. In the method, a controlling chip is used to realize a controlling mode of frequency modulation, pulse width modulation, and combination thereof with respect to the resonance circuit through the voltage matching module and the resistance controlling module. The present invention is advantageous in low cost and high efficiency. | 12-10-2009 |