53results about How to "Reduce output loss" patented technology

Magnetron discharges are pulse-operated to avoid the so-called "arcing". In the case of magnetron discharges from alternating current-fed magnetrons, the process is limited to the minor power of the energy supply because of the load-carrying capacity of the required electric components. When the magnetron discharges are fed by direct current, their effectiveness deteriorates because of the deposition of layers on the anode surfaces. The new process should enable a high supply power and prevent arcing. In magnetron discharges with at least two magnetron electrodes, the energy is supplied in such a way that at least one magnetron electrode is a cathode or anode and a number n1 of direct current pulses of said polarity is supplied. The poles of at least one magnetron electrode are then reversed and a number n2 of direct currents of this polarity are supplied. The process is carried on in this manner, the frequency of the direct current pulses being higher than that of the polarity reversals. The energy supply effectiveness is thus improved. This process and system enable the production of layers having the most different properties, for example for the glass, packaging, electronic, and machine construction industries.

A guide means of a centrifugal force separator or cyclone separator for separating at least one substance from a gaseous or liquid medium under the action of centrifugal forces has two or more baffle plates (2) with a radius which decreases from the center axis of the guide means, viewed in the direction of rotation of the medium. Between these baffle plates (2) entry openings (16) into the guide means are formed for the medium from which the substance has been largely removed into the guide means. There is a bottom plate (3) on the end of the guide means which projects into the interior of the device. To improve incident flow or inflow of the medium into the guide means, the bottom plate (3) in the area of the entry openings (16) has recesses (12).

The solid-state relay contains following parts: a luminous element; light voltaic diode array for generating effect of photoproduction voltage after receiving light signal; a field effect transistor (FET) for responding light voltaic output. The relay also includes a NPN triode and a PNP triode. Being connected to each other in parallel, base pole and emitter of the said triodes are connected between grids of light voltaic diode array and output FET. Base pole and emitter of the NPN triode as well as grid poles and source poles of light voltaic diode array and FET constitute series connection loop. A diode is inserted between collector of NPN triode and drain pole of FET. Cathode of the diode is connected to collector of NPN triode and a capacitor. The capacitor, NPN triode and diode constitute a charging circuit for grid of the FET. Being added in the invention, the charging and discharging circuit for grid of the FET quickens operation for turning on and off the solid-state relay.

A modular gear train mechanism with an internal motor includes a hollow casing with an opening, a flywheel, a motor, a fixing gear, a rotating gear and a top cap sealing the opening. The flywheel is mounted between the interior of the top cap and the interior of the casing. A first and a second planet gears are mounted on the exterior of the flywheel pivotally. The motor received in the flywheel has a rotor shaft on which the flywheel is mounted pivotally. The fixing gear is fixed in the flywheel and engages with the first planet gear. The rotating gear is connected to an inner wall of the top cap and engages with the second planet gear. When the rotor shaft turns, the rotating gear is driven to turn and drive the top cap to turn synchronously. Accordingly, the present invention has a reduced volume and is easily used.

A method, circuit configuration and bridge circuit for charging a capacitance effective on the main current terminals of a semiconductor switch, in particular an intrinsic capacitance, in particular the drain-source capacitance of a MOSFET semiconductor switch or the collector-emitter capacitance of an IGBT semiconductor switch, the precharging, in particular the at least partial charging, of the effective capacitance being forcibly controlled via a charging current path.

A method of controlling the output power from a wind energy installation to a utility grid having a specified nominal frequency is provided, in which the output power is controlled depending on the actual grid frequency in the utility grid such that the output power is reduced when the grid frequency exceeds a predetermined value. The predetermined value is at most two per mill higher than the nominal frequency of the grid and the output power is reduced as soon as any increase of the grid frequency above the predetermined value is detected.

It is an object to obtain a photovoltaic power generation system. A photovoltaic power generation system includes multiple solar cell modules each having a different band gap and step-up voltage transformers (boosters) that receive outputs from load resistors, the load resistors being controlled to maximize outputs of the respective solar cell modules. An output voltage of each step-up voltage transformer (booster) is controlled to be a predetermined output voltage (or output current), and the step-up voltage transformers (boosters) are connected in parallel (or in series) to obtain predetermined electric power.

The utility model relates to an improved transmission mechanism for wheel hub motors of electric vehicles, which comprises an electric motor, a wheel hub casing, a main shaft, a speed reducer and a clutch; wherein, the stator and the stator casing of the electric motor are fixedly connected on the main shaft; the rotor is arranged inside the stator and the stator casing and is connected with the speed reducer; the speed reducer is connected with the wheel hub casing through the clutch. The utility model is characterized in that: the speed reducer comprises two positioning disks, a planetary gear, a bearing, a connecting shaft and a casing. The three planetary gears are symmetrically arranged between the front and the rear positioning discs; both ends of rotating shafts of the planetary gear are fixedly connected on the front and the rear positioning discs; a circle of teeth are arranged inside the casing and meshed with the three planetary gears; the casing is mechanically fixed with the electric stator and stator casing. The utility model has the advantages of small motor output loss, low noise, and long service life.

There is provided a power supply including a direct current (DC) to DC converter supplying main power to a load, and a sub converter connected to the DC to DC converter and reducing output loss, wherein the sub converter is operable based on a hold-up time.

The invention discloses a three-dimensional terahertz wave parametric oscillator, comprising a pump source, a GaAs crystal, a mirror and a paraboloid mirror arranged around the GaAs crystal; The pumpsource is made up of KD*P crystal, Polarizer, Nd: A YAG laser pumping module is composed of a first mirror, a second mirror, a third mirror, a fourth mirror, a fifth mirror and a sixth mirror. The pumping light emitted from the pumping source is resonantly amplified in a resonant cavity composed of a first mirror, a second mirror, a third mirror, a fourth mirror, a fifth mirror and a sixth mirror.In the process of optical parameters, Stokes light and pump light in the cavity can be recycled, and the efficiency of pump light can be improved effectively. Six terahertz waves can be generated byone pump beam, and the optical conversion efficiency is effectively increased.

The invention discloses a push-pull power amplification circuit and a radio frequency front-end module. The push-pull power amplification circuit comprises a first power amplification tube, a second power amplification tube, a first conversion balun and a first capacitor; the first input end of the first conversion balun is connected with the output end of the first power amplification tube through a first inductor, and the first input end of the first conversion balun is connected with the first end of the first capacitor through a second inductor; the second input end of the first conversion balun is connected with the output end of the second power amplifier tube through a third inductor, and the second input end of the first conversion balun is connected with the second end of the first capacitor through a fourth inductor; therefore, the impedance conversion pressure of the first conversion balun for impedance conversion of the push-pull power amplification circuit is relieved, the first conversion balun can realize impedance conversion by adopting a small number of coil turns, and the output loss of the push-pull power amplification circuit is further reduced.

The invention discloses a power supply circuit, which comprises a detection unit for providing a plurality of control signals according to the amplitude of an input power supply voltage; a first path,and a second path, wherein when the amplitude of the input power supply voltage is smaller than a second reference value, the first path and the second path are disconnected, when the amplitude of the input power supply voltage is larger than or equal to the first reference value, the first path is connected, the second path is disconnected, and when the amplitude of the input power supply voltage is larger than or equal to the second reference value and smaller than the first reference value, the second path is connected, and the first path is disconnected. The invention further discloses adisplay device. Different power supplies can be used for supplying power, proper working voltage of the driving module is guaranteed, noise and interference are reduced within a certain voltage range,and adverse effects on product quality are avoided.

The invention discloses a photovoltaic assembly and a preparation method thereof. A high infrared radiance structure containing infrared radiation materials is arranged on the back of the photovoltaic assembly. According to the invention, the heat transferred to a surrounding environment by the photovoltaic assembly through radiation is enlarged, and the operating temperature of the photovoltaic assembly is reduced, therefore, the output loss brought about by the temperature increase of the photovoltaic assembly is reduced; in addition, the service life of the photovoltaic assembly can be prolonged and realistic positive significance is obtained.

A tensioner that can precisely control the vibration amplitude of the second shaft member of the tensioner to which an external input load is applied. In the present invention, the first shaft member (3) and the second shaft member (4) screwed together by the threaded parts (8, 9) and the torsion spring (5) rotating in one direction and compressing the first shaft member (3) Contained in the housing (2). The rotational momentum of the torsion spring (5) is converted into the driving force of the second shaft member (4), and the rotation of the second shaft member (4) is restricted. An elastic member (20) is provided between the first shaft member (3) and the second shaft member (4) to generate a resisting torque corresponding to an external input load applied to the second shaft member (4), thereby precisely suppressing the second shaft member (4). Amplitude of the 2-axis component (4).

This wheel comprises a plurality of vanes (2) arranged on a crown (3) and is equipped with a tip-forming member (10) attached to a central region (32) of the crown or hub of the wheel (1), radially inside the vanes (2), the crown defining a wet surface (31) for guiding a flow (E) passing between the vanes. The tip-forming member (10) is provided with at least one opening (121) for diverting a fraction (E₁) of the flow towards the internal volume (V₁₀) of this member. This member comprises a frustoconical annular skirt (11) and at least one fin (15) arranged in its internal volume (V₁₀) and able to modify the path of the flow fraction (E₁) entering this volume through the opening (121). This fin (15) extends as far as the edge (112) of the skirt (11) which defines an outlet opening (14) of the member (10) for the flow fraction (E₁).

The invention provides an electrohydraulic automatic clutch actuating mechanism which comprises a motor, a worm gear, a ball screw, a housing and a main hydraulic cylinder, wherein the housing is provided with an inner cavity penetrating in an extension direction of the housing; one end of the inner cavity is sealed by a plug lid; the other end of the inner cavity is in sealing connection with themain hydraulic cylinder; a bearing is fixedly arranged in the inner cavity; the ball screw is arranged in the inner cavity; a nut of the ball screw is rotationally connected with the bearing; one end, close to the plug lid, of a threaded rod of the ball screw is free; the other end of the threaded rod extends into the main hydraulic cylinder and is connected with a piston of the main hydraulic cylinder; the motor is in sealing connection with the housing; an output shaft of the motor penetrates through the housing and is located in the inner cavity; the output shaft of the motor is sleeved with the worm gear; the worm gear is located in the inner cavity; a helical gear of the worm gear is rotationally connected with the nut of the ball screw; and the worm gear rotates to drive the nut torotate. The electrohydraulic automatic clutch actuating mechanism solves the problems that a hydraulic automatic clutch is not compact in structure and large in size, and the loss of power transmittedby the motor is large in the prior art.