34results about How to "Reduce system efficiency" patented technology

The invention belongs to the technical field of integrated circuits, in particular relates to a clock frequency selection circuit suitable for a switching power converter. The clock frequency selection circuit comprises two comparators, a finite state machine (FSM) and two multiplexers. The clock frequency selection circuit is applied to a switching power direct-current (DC) / DC converter, and hasthe advantages that the comparators are not required to increase and the encoding of the FSM is modified only so that multiple alternative frequencies can be selected freely, thus reducing the statical power consumption of a system and improving the system efficiency of the switching power converter.

The invention belongs to the technical field of water treatment and discloses a suspension type distillation device based on a nanomaterial and solar energy. The distillation device comprises an uncovered water tank, a water tank cover, nano cloth and a water collection component, wherein a liquid storage tank is arranged below the uncovered water tank; the water tank cover is arranged on the uncovered water tank; part of the nano cloth is fit with the lower side of the water tank cover; part of the nano cloth is immersed in liquid in the liquid storage tank; the water collection component comprises a condensate tank; the condensate tank is an open hollow structure and is suspended on the liquid in the liquid storage tank; and a capillary structure is arranged on the surface on one side, facing towards the water tank cover, of the condensate tank. The device can achieve heat exchange of steam and water to be evaporated on the basis that a solar energy resource is made full use of; condensate water is absorbed and transported quickly by a capillary action at the same time; the scattering of sunlight by the condensate water is effectively avoided; and a utilization ratio of the solarenergy is further increased on the basis that the efficiency of water purification treatment is significantly improved.

The invention discloses a timer event processing method and device, used for solving the problems of being low in system efficiency and high in power consumption due to frequent Timer events of a system. The method comprises the following steps: determining the expectant expiration time and the maximum allowance delay time of a first timer event, and determining a time interval determined by the expectant expiration time and the maximum allowance delay time; if determining that the timer event, the expiration time of which is within the time interval, exists in an event list, selecting a second timer event, the expiration time of which is within the time interval, in the event list, and setting the expiration time of the first timer event as the expiration time of the second timer event; and adding the first timer event into the event list according to the set expiration time.

The invention provides a self-excitation-reinforcing high-voltage conversion system of a switch reluctance generator. The system is composed of three conversion branches and an isolation and voltage-down DC / DC converter. The input ends of the three conversion branches are connected in parallel, the output ends of the three conversion branches are connected in series, thus, higher voltage output isobtained, excitation reinforced parts are distributed in all the conversion branches where all phases of windings are located respectively, independent excitation power sources are omitted, the system reliability is improved, and the advantages of a switch reluctance motor are effectively utilized. As input end voltages are far lower than output end series total voltages, voltage withstanding ofinternal devices is low, meanwhile, the switching frequency of all switching tubes is within a low-and-medium frequency range, and losses are low. The system is very suitable for converters of all switch reluctance generators, and especially is oriented to high-voltage loads or grid-connection requirements.

The invention discloses a semi-solid lithium cathode suspension based on nickel-cobalt lithium manganese oxide / carbon nanotube composite material, which is used to improve the contradiction between the conductivity and fluidity of the suspension in a semi-solid lithium ion flow battery, and Improving the electrochemical performance of semi-solid lithium-ion flow batteries. As a high-performance conductive agent, carbon nanotubes are easier to form a conductive network than traditional carbon black conductive agents, but when directly added to the suspension, the viscosity of the suspension will increase significantly, increasing the pump work and reducing the efficiency of the battery system. Combining carbon nanotubes with lithium ion active materials can enhance the conductivity of the suspension while reducing the increase in viscosity, and can bring about many improvements in electrochemical performance.