248results about How to "No power loss" patented technology

A suction type turbine-driven pool-cleaners utilizing vortex turbines to propel and steer the pool cleaner is disclosed. The cleaner includes a housing for one or more vortex-turbine mechanisms, each with a chamber and a turbine, tracks for movement over submerged surfaces, a differential mechanism for steering purposes, a reverse of inlet flow mechanism, a cam design for engagement of steering and reversing mechanisms, a means of controller inlet flow for steering purposes, and a means of controlling flow for reversing direction of cleaner movement.

The invention relates to an AC to DC converter. The converter comprises an electromagnetic interference filter, a rectifier filter and a discharge circuit, wherein the electromagnetic interference filter receives commercial alternating current; the rectifier filter is coupled between the electromagnetic interference filter and the discharge circuit; the electromagnetic interference filter containing a safety regulation capacitor (or X capacitor) is connected across the live line and zero line of the commercial alternating current; and the discharge circuit contains a discharge resistor, and when detecting that the commercial alternating current is removed, the discharge resistor is controlled to discharge the residual charges on the X capacitor. When the commercial alternating current is not removed, the discharge resistor has no power loss; and as the designed resistance value of the discharge resistor does not need to be very large, the residual charges on the X capacitor can be fast discharged when the commercial alternating current is removed.

The invention has a first series circuit consisting of a capacitor and a diode and a second series circuit consisting of a coil and a diode, the first series circuit is connected in parallel to the commutating diode in a state that the capacitor is connected to a choke coil side in the commutating diode, and the second series circuit is connected between a connecting portion of the capacitor and the diode in the first series circuit and a commutating diode non-connecting side in the choke coil.

A buoyancy vehicle apparatus includes a water or liquid source, such as a water tank, and a buoyant mass in communication with an electrical generator. The buoyant mass is lifted from a lower level to a higher level to store energy. The mass is stored at the predetermined height and released to travel downward when the electricity is needed. After the mass is released and pulled down by gravity, it will drive the generator to produce electricity. The system can store this energy with no loss in power over a long period of time.

The present invention provides a harmonic control based efficient Doherty power amplifier. The harmonic control based efficient Doherty power amplifier includes an equal Wilkinson power splitter, a carrier power amplification circuit, a peak power amplification circuit, and a load modulation network. The equal Wilkinson power splitter is used for equally dividing an input power and then outputting the equally divided input power to the carrier power amplification circuit and the peak power amplification circuit. The output end of the carrier power amplification circuit and the output end of the peak power amplification circuit are connected with the load modulation network. The load modulation network outputs the power to a load. Compared with the prior art, a harmonic control circuit is used in an class E power amplifier to control a high-order harmonic, a load impedance is converted to a required fundamental wave impedance by a harmonic control network, an open circuit is on odd harmonic frequency, and short circuit is on even-number harmonic frequency, so that waveform shaping is realized, theoretically, a power amplification transistor has no power loss, and ideal drain efficiency of the power amplifier can reach 100%.

The invention relates to a variable displacement rotor oil pump which comprises a pump cover, a pump case, a displacement adjusting structure and an intermediate cover plate, wherein the displacement adjusting structure comprises a centrifugal adjusting mechanism, a first inner rotor, a first outer rotor, a second inner rotor, a second outer rotor and a rotating shaft; an upper oil cavity is formed between the pump cover and the intermediate cover plate; the first inner rotor and the first outer rotor are matched with each other and are positioned in the upper oil cavity; a lower oil cavity is formed between the intermediate cover plate and the pump case; the second inner rotor and the second outer rotor are matched with each other and are positioned in the lower oil cavity; the lower oil cavity is divided to form a lower high-pressure oil area and a lower low-pressure oil area; the centrifugal adjusting mechanism, the first inner rotor and the second inner rotor rotate along with the rotating shaft; when the rotating speed of the rotating shaft is lower than the preset value, the oil in the lower high-pressure oil area is separated from the oil in the lower low-pressure oil area; and when the rotating speed of the rotating shaft is higher than the preset value, the rotating shaft and the second inner rotor are driven to rise upwards by the centrifugal force of the centrifugal adjusting mechanism, and the oil in the lower high-pressure oil area is communicated with the oil in the lower low-pressure oil area.

The invention discloses a voltage-regulation switching circuit, comprising a voltage circuit (for conversion of high/low voltage of the imported AC power supply), a controllable silicon rectifying filter circuit (connected to the output end of the voltage-transforming circuit, and rectifying and filtering the secondary alternating current) and a trigger circuit (used to control the rectifying filter circuit to switch on/off). The voltage-transforming circuit comprises a main circuit transformer and also comprises an AC booster connected to the main circuit transformer; the trigger circuit comprises an auxiliary DC power-supply circuit and a signal generator circuit; the trigger and conduction end of the controllable silicon rectifying filter circuit is connected to the signal output end of the signal generator circuit. The invention adopts an AC booster to regulate the output voltage; because no potentiometer is adopted, no extra power loss occurs, and as a result, the normal operation of the electromagnet testing circuit under high power is achieved; besides, controllable silicon rectifying filter circuit can be adopted to realize switching control of 0 up to 30 times/second.

The invention belongs to the technical field of integrated circuit design, and particularly discloses a nondestructive inductor current detection circuit applicable to a high-frequency step-down type voltage converter. Circuits of the high-frequency step-down type voltage converter consist of a power-level circuit and a control-level circuit. The nondestructive inductor current detection circuit comprises a four-input operational amplifier OP, four voltage division resistors Rf1, Rf2, Rf3 and Rf4 and an integrated element consisting of three pairs of Rc and Cc, and is used for detecting current flowing through an inductor L. In the circuit, corresponding inductor current information is obtained by integrating voltage at the two ends of the inductor in the switching step-down type voltage converter, so that nondestructive detection of the inductor current is realized. Compared with the conventional current detection circuit, the circuit has the advantages of realizing no additional power consumption in the high-frequency step-down type voltage converter and low-cost inductor current detection and making the conventional current control method possible to be applied to high switching frequency.

The invention relates to a lifting device of a camera and electronic equipment comprising the same. The lifting device of the camera comprises a mounting frame, an ultrasonic motor and a slide block.The ultrasonic motor is mounted on the mounting frame and drives the camera to move through the slide block. According to the lifting device of the camera, the ultrasonic motor is adopted, and the reaction speed of the ultrasonic motor is about 10 times faster than that of an electronic motor; the driving noise is quite low; the retentivity is high under power-off conditions; since no electromagnetic coil is used, no free electron wave is produced; and under non-action circumstances, no electric power is consumed.

The invention relates to a method for processing images of a liquid crystal display (LCD), comprising the following steps that: backlighting parameters are obtained according to image datum; a backlighting source is adjusted against the backlighting parameters; a gray reference value is obtained against the adjusted backlighting source, wherein the gray reference value between a first gray boundary value and a second boundary value; when the gray value of the image datum is between the gray reference value and the first gray boundary value, the gray value of the image data is converted into a corresponding output gray value against the backlighting parameters; when the gray value of the image data is between the gray reference value and the second gray boundary value, the gray value of the image data is converted into a corresponding output gray value against a linear relation. The invention can improve contrast degree of the image and increase the color levels displayed by the image so as to highlight the image.

In a laser diode arrangement for generating single mode tunable laser radiation wherein the laser diode forms a first resonator and has rear and front facets and a second external resonator is coupled to the first resonator, and an optical transmission component and a wavelength selective optical reflection element are arranged in the laser light path from the laser diode for directing part of the laser light into the external resonator and coupling it back into the first resonator, means are provided for changing the coupling quality of the first resonator to the external, second resonator.

The present invention provides a method for starting a flexible direct current transmission system, which is applied to a flexible direct current transmission system including clamp twin sub-modules. In the second charging stage, the leading IGBT of the converter connected to the grid is turned on, the converter on the rectification side is unlocked, and the converter on the inverter side is unlocked. converter, so that the charging voltage of the converter of the clamping twin sub-module can reach the charging voltage of the converter of the half-bridge module, thus solving the shock when the converter is unlocked caused by the low charging voltage of the flexible direct current transmission system of the C-MMC module For the problem of large current, the flexible direct current transmission system is started by this method, and both the alternating current impact and the direct current impact are relatively small.

The invention provides a lithium ion battery equalization control enablement method and a quitting method for hybrid vehicle, and the control enablement method is as follows: when the vehicle is in an idle state, parking time of the vehicle is determined; if the parking time exceeds a preset threshold, battery voltages of all monomers of a battery pack are collected; if the voltage difference exceeds a certain threshold and a present system does not have fault, an equalization is enabled to carry out for the battery monomer. In the equalization process, if the voltage difference is less than a certain threshold, or the vehicle has a power on request, or the equalization temperature is higher than a certain threshold, or an equalization time exceeds a certain threshold, the equalization function quits from the monomer battery which is carried out with the equalization. According to the invention, the equalization enablement method and the quitting method can be carried out for correct effective equalization start and close control in the prerequisite that the battery and the vehicle are safe, and reduce differences between battery monomers.

The invention discloses an electric vehicle charging completion battery thermal insulation control system, which is characterized in that after charging reaches a full charging state or reaches a designed target charging charge capacity SOC, a heating system is kept in a power-on state; and whether the heating system is started is judged according to the connection state of the charging gun, the temperature Ti of the single battery, the environment temperature T0 and the set target temperature Tt. Multi-state monitoring of the battery is started through judgment of the charging gun, the singlebattery temperature and the environment temperature state, and the situation that the service life of the battery is shortened and the endurance mileage of the battery is reduced due to the fact thatthe battery temperature is reduced after charging is completed is avoided.

The invention relates to a pneumatic diving pump which comprises a shell. The shell is provided with a water inlet, a water outlet, an air inlet and an air outlet, wherein the water outlet is provided with a first drain pipe, and the air outlet is provided with a vent pipe which communicates the air outlet and the first drain pipe so as to discharge compressed air drained from the air outlet and sewage drained from the water outlet along the first drain pipe. The invention basically realizes no power loss and no noise, does not generate an icing block phenomenon, can improve the pump lift at a full flow rate, has simple structure, smart conception, remarkable energy-saving effect and low manufacture cost and greatly improves the practicability of the pneumatic diving pump.

The invention provides a lossless buffer circuit for suppressing GaN half-bridge module voltage spike and current resonance and a test circuit thereof, belongs to the technical field of wide band gapsemiconductor power device driving, and aims at the problem that the voltage and current spike caused by the high switching speed of the power device endangers the stability of the system in the existing half-bridge module using the GaN power device. The lossless buffer circuit is mainly composed in a way that an inductor, a capacitor and a diode are connected in parallel in turn and then connected in series with another capacitor. The lossless buffer circuit is connected between the upper bridge arm power device drain and the lower bridge arm power device source of the GaN half-bridge module.When the parasitic inductance current of the power loop of the bridge circuit topology changes, a low impedance loop can be provided so as to suppress the spike voltage of the two ends of the power device and destroy the current resonance loop in the GaN half-bridge module and thus the current oscillation at the module outlet can be avoided.

The invention provides a method for starting a flexible direct current transmission system, which is applied to a flexible direct current transmission system including a diode clamp module. The flexible DC transmission system of the clamp module, and uncontrolled rectification charging; in the second charging stage, the leading IGBT of the converter connected to the grid is turned on, the converter on the rectification side is unlocked, and the converter on the inverter side is unlocked converter, so that the charging voltage of the converter of the diode clamp module can reach the charging voltage of the converter of the half-bridge module, thus solving the shock when the converter is unlocked caused by the low charging voltage of the flexible direct current transmission system of the D-MMC module For the problem of large current, the flexible direct current transmission system is started by this method, and both the alternating current impact and the direct current impact are relatively small.

The invention discloses a wind energy water storage irrigation system. The wind energy water storage irrigation system comprises a wind blade, a bevel gear connected with a fan, an off-course correcting tail wing, a bevel gear connected with a drive wheel, a double-headed bevel gear, a steering shaft, a drive gear, a driven gear, two synchronous belts, a synchronous wheel, a plurality of waterwheels from top down, a water storage tank, a drip irrigation guide pipe and multiple water storage boxes. The wind blade is driven by utilizing wind energy to rotate, and the waterwheels are driven to rotate through transmission, then the rotating waterwheels can lift up underground water layer by layer and collect the water into the water storage tank in the end, and finally the water flows out through the drip irrigation guide pipe for drip irrigation. According to the wind energy water storage irrigation system, the wind energy is made full use of to constantly lift up the water to the required height, so that the drip irrigation can be facilitated to save the water resources; and meanwhile, a new product which is convenient and quick is provided for life. Therefore, the wind energy water storage irrigation system has the characteristics of economy of water and energy, wide application range, small noise, simple structure, beautiful mechanical structure and the like.

A method is described for changing gear-ratio by displacing at least one part of the engaging surface of a composite gear (21) and aligning it to the engaging surface of another gear (22), thus permitting a complementary third gear (25) engaged to the engaging surface, to shift from one composite gear to a different composite gear, while being constantly engaged. The method can be employed in a device, which can be used to form a gear-based, continuously engaged, variable transmission. Such a transmission, enhanced by—being combined with a differential assembly and the appropriate gearing, can provide rotational motion at various speeds in one direction and the reverse direction as well as zero motion.

The invention provides a gas cooker. The gas cooker is provided with a pot bottom temperature sensor. A gas supply path for supplying the gas to a burner is provided with a control valve and a throttle hole connected with the control valve in parallel. The control valve is closed when the sensor detection temperature is above the upper limit temperature of the specified setting temperature ranges and is opened when the sensor detection temperature is below the lower limit temperature of the specific temperature ranges. The gas cooker can reduce power consumption of the control valve, and the smallest gas volume specified by the throttle hole can be set to be as small as possible to improve the temperature adjusting performance. The control valve is formed by an electrodynamic type diaphragm valve. The electrodynamic type diaphragm valve comprises a valve shell, a diaphragm, a valve body portion, a motor and a feeding lead screw mechanism, wherein the valve shell is internally provided with a valve chamber and a valve seat arranged on an end wall of one end of the valve chamber, the diaphragm is installed on the end face of the other end side of the valve chamber, the valve body portion is arranged on the diaphragm and opposite to the valve seat, and the diaphragm can be deflected by the forward rotation and reverse rotation of the motor to enable the valve body portion to be close to or away from the valve seat.