326results about How to "Uniform energy" patented technology

A variety of techniques may be employed, alone or in combination, to enhance contact between a processed substrate and applied megasonic energy. In accordance with one embodiment of the new invention, the vibration plate is brought into intimate contact with one surface of the substrate, while cleaning or processing fluid contacts the other. In accordance with an alternative embodiment of the present invention, a reflecting surface may be provided to cause emanated energy to be reflected back into the near field and make it more uniform. In accordance with another alternative embodiment of the present invention, energy may be transferred across a substrate bounded on both sides by liquid with incidence of megasonic energy that is either normal to the substrate surface or within a critical range of incident angles. In yet another embodiment, generated dilatational waves may be converted to surface waves prior to contacting the substrate.

The invention discloses a charge-discharge battery pack equilibrium management system which comprises N batteries, N-1 lossless equilibrium charge-discharge circuits, a signal acquisition circuit, a master control unit and a drive circuit, wherein each lossless equilibrium charge-discharge circuit comprises an energy storage inductor, an energy storage capacitor, a first semiconductor switch device and a second semiconductor switch device and is characterized in that the energy storage capacitor is connected in series between a switch back end of the first semiconductor switch device and a switch front end of the second semiconductor switch device. The charge-discharge battery pack equilibrium management system has the obvious effects that the capacitor in the equilibrium mode plays a role of energy transfer, which reduces the power consumption, has more advantages in volume and weight, and has stronger mechanical impact resistance. The charge-discharge battery pack equilibrium management system realizes the energy equilibrium of batteries, dispensing with a complicated energy transfer device, and has the advantages of simple structure, easy realization and convenient maintenance and expansion.

The present invention is directed to a method and device to desorb an analyte using heat to allow desorption of the analyte molecules, where the desorbed analyte molecules are ionized with ambient temperature ionizing species. In various embodiments of the invention a current is passed through a mesh upon which the analyte molecules are present. The current heats the mesh and results in desorption of the analyte molecules which then interact with gas phase metastable neutral molecules or atoms to form analyte ions characteristic of the analyte molecules.

The invention discloses a modular multilevel converter modulation method based on double queues. The method includes: grouping submodules according to on-off status, and sequentially storing the same in an input queue or a remove queue from low voltage to high voltage; selecting number of the to-be-input or to-be-removed submodules according to bridge arm level variation, bridge arm current direction and maximum voltage deviation of the submodules, performing corresponding input and remove operations the selected submodules, and adjusting the two queues. By the method, only the on-off status of the submodules with the largest number or the smallest number in the two queues needs to be changed, switching frequency is kept low, voltage ordering is not required by all submodules, the queues can be adjusted by simple comparison, times and time of comparison required by ordering are reduced, system response speed is increased, and huge engineering application value is achieved.

The invention discloses a hybrid MMC capacitor voltage balance control method which comprises the following steps that (1) a positive input record library, a negative input record library and a removal record library are built, (2) the maximum voltage deviation value of a sub-module capacitor in a bridge arm is determined, (3) according to the maximum voltage deviation value of the sub-module capacitor in the bridge arm, repeated input operation of the sub-module of the bridge arm is analyzed through judgment logic, and the record libraries are updated, (4) according to the bridge arm level difference before a moment and after the moment, sub-module switching operation is carried out in the bridge arm through a logic judgment and control strategy, and the record libraries are updated. By means of the method, switch frequency of the sub-module is effectively lowered on the situation that capacitor voltage keeps stable, converter loss is reduced, and meanwhile the problem that system operation performance deteriorates due to sequencing problems can be reduced.

The invention relates to a multipath routing reliable transmission method based on network coding. The method comprises the steps as follows: a converged node periodically broadcasts routing update information, and each node acquires hop counts from self to the converged node and a neighbor table which contains all neighbor nodes and residual energy thereof; a source node calculates the needed path number; the source node encodes data packets needing to be transmitted, selects the next hop of node and sends the data; after the next hop of node receives the encoded packets, the data packets with the same group of marks are encoded, and the needed path number is recalculated; and the process above is repeated until the last node arrives at the converged node, and then the original data packet is decoded by the converged node. By adopting the method provided by the invention, reliable transmission of the network and the balance of the energy of the network can be guaranteed.

The invention belongs to the technical field of a wireless sensor network protocol, which concretely relates to an energy efficiency opportunity routing protocol in a wireless sensor network. The invention modifies the traditional opportunity routing aiming at the property that the energy of the sensor network can not be regenerated, adjusts the priority level of standby forwarding nodes in the opportunity routing according to the residual energy of the forwarding nodes, reduces the priority level of nodes with lower residual energy, and enhances the priority level of transfer nodes with higher residual energy. By the adjustment of the sequence of the priority level of the forwarding nodes, the probability that the nodes with lower residual energy undertakes an actual forwarding task is reduced, so that the energy consumption of the forwarding nodes is slowed down; contrarily, the nodes with higher residual energy has larger probability to undertake the forwarding task. By applying the mechanism, the data forwarding task carries out dynamic adjustment according to the quantity of the residual energy of the nodes, so that the purpose of energy balance in the whole network is achieved.

The invention discloses a zero DC voltage fault ride-through control method of a multilevel modular converter (MMC) under an asymmetric state of bridge arm parameters. Sub-modules in the MMC all employ full-bridge sub-modules, an auxiliary loop is added among bridge arms of the same DC bus side to build a new topology, energy equalization of three upper bridge arms and energy equalization of three lower bridge arms are maintained when the auxiliary circuit among the bridge arm works during the zero DC voltage fault ride-through process, all modular voltages are integratedly equalized by adjusting voltage deviation among the upper bridge arms and the lower bridge arms, a fault current is enabled to be eliminated during the zero DC voltage fault ride-through process of the MMC, reactive power support is continued to be provided for an AC system, and the energy equalization of the sub-modules is maintained particularly when the bridge arm parameters of the MMC are asymmetric. By the topology and the control method thereof, the voltage deviation caused by asymmetric bridge arm parameters can be jointly borne by the six bridge arms, the integral energy equalization is maintained, a short-circuit current is limited to a low level, and zero DC voltage fault ride-through is achieved.

A recording head having a plurality of recording elements comprises a plurality of switching elements, each provided in correspondence to each of the plurality of recording elements, constant current sources, each provided in correspondence to each of the plurality of recording elements, for flowing a constant current, and a constant current control circuit for controlling the constant current supplied from the constant current sources, and the recording elements are driven by N constant currents from the constant current sources.

The invention discloses a method and device for automatically equalizing voltages of power battery groups. Each single battery of the serially connected power battery groups is connected with an electronic switch, the serially connected power battery groups are connected with a charge-discharge circuit through the electronic switches, and the voltages of the serially connected power battery groups are compared by detecting voltages at two ends of each single battery in real time; a first electronic switch connected with the first single battery is switched on when the voltage of the first single battery is larger than that of a second single battery, and the first electronic switch of the first single battery is switched off after the first single battery charges the charge-discharge circuit; and a second electronic switch connected with the second single battery is switched on, and the charge-discharge circuit charges the second single battery, thus the voltages of the first single battery and the second single battery are equalized, and all the processes are sequentially repeated till the voltages of all the single batteries of the serially connected power battery groups are equalized. According to the method and device for automatically equalizing the voltages of the power batter groups, disclosed by the invention, direct equalization between the high-voltage single batteries and the low-voltage single batteries is realized in the serially connected power battery groups in short time.

A backlight module including a printed circuit board, multiple light emitting diodes, and a light guide plate is disclosed. The multiple light emitting diodes can be arranged in an array or arbitrarily on the printed circuit board to provide the necessary light source for the back light module. The light guide plate with a light input surface and a light output surface is disposed on the multiple light emitting diodes. The light guide surface of the light guide plate may be flat or curved. A plurality of recesses on the light output surface of the light guide plate are configured to have the light from the light emitting diodes achieve total internal reflection effectively so that the lights are uniformly mixed in the light guide plate prior to emitting from the light guide plate. Therefore, light emitted from the light output surface of the light guide plate has higher brightness and more uniform energy.

A uniform light spot surface scanning device of a laser cleaning machine comprises a laser output module (10), a gauss-flat top system, a gradually-changing rotating polygonal mirror (50), a drive motor (60) and a collimation focusing lens (70). The gauss-flat top system redistributes the energy of a gaussian laser beam emitted by the laser output module (10) and compresses the diameter of the laser beam at the same time, so that a laser beam with uniform energy is formed; the laser beam irradiates the gradually-changing rotating polygonal mirror (50); the gradually-changing rotating polygonal mirror (50) is driven by the drive motor (60) to rotate so as to make the laser beam form a space angle scanning beam; the space angle scanning beam is refracted by the collimation focusing lens (70) and then forms surface light spots on an object (80) to be cleaned.

COMPENSATED MOTOR TORQUE WIND TURBINE, constituted by a single blade (12) rotor (1) attached to a low speed shaft (3) with spindle (2) sustained in a nacelle (9), on gear bearing (7), at the end of the tower (8), being the power train elements: multiplier (5), generator (6) and brake (13) suspended from the nacelle (9) through a first bearing (4) aligned with the low speed shaft (3), forming a pendulum set (28) that allows them to rotate, compensating in its angular motion the rotor (1) torque, said pendulum set (28) accumulates potential energy when rising in its angular motion and releases it when the gust stops by descending and turning in the opposite direction of the rotation of the turbine's rotor (1) restituting turns to the generator's (6) rotor, being this effect a power regulator.