60results about How to "Maximize conversion efficiency" patented technology

The invention provides a hybrid multi-output power supply and a regulating method thereof. The hybrid multi-output power supply is used for generating a constant-voltage output to drive a load and generating a constant-current output to drive a light-emitting diode (LED) and comprises a primary voltage regulating circuit, a secondary voltage regulating circuit and a driving circuit. Only a primary voltage converting circuit is required to acquire driving voltage which is required to support a sequent LED, so that an implementing circuit and a control scheme of the hybrid multi-output power supply are relatively simple, the structure of the circuit is simplified, and the implementing cost is reduced; and furthermore, first regulating voltage can be regulated according to change of the current of the LED, so that the numerical value of the first regulating voltage can be always kept the minimum voltage value capable of driving all the circuits of the LED along with the change of the current of the LED, and the power converting efficiency is improved to the maximum extent.

The present invention discloses an integrated voltage regulator comprising a switching regulation and an additional regulation mechanism. The additional regulation mechanism permits better control of the voltage regulator to enable improved performance. The present invention integrated voltage regulator provides an output voltage Vout in the form

Vout=(Vin−Vamp)*(Duty Cycle)−Vslew

where the additional regulation mechanism comprises an amplitude modulation Vamp to modulate the input voltage Vin, a slew rate modulation Vslew to modulate the output voltage Vout, or a combination of amplitude modulation and slew rate modulation.

Proposed is a wavelength converting device (100) comprising a non-linear optical crystal (10) having periodically poled regions (20,30) with alternating polarity. The device (100) is characterized in that the period (41,42) of the poled regions along an axis (X) of the device vary in a direction (Y) perpendicular to the axis. The invention is based on the insight that a poling period corresponds to a given temperature. Thus, providing different poling periods along a direction in the wavelength converting device advantageously allows correlating the position of the device along that direction with a temperature.

Provided are a variable gain amplifier and a receiver including the same. The variable gain amplifier includes: a gain controller generating a gain control voltage; a variable gain amplifier amplifying an input signal and a feedback signal by using a voltage gain that is linearly proportional to the gain control voltage, and converting the amplified signal into a predetermined magnitude of a signal; and an offset canceller removing an offset from an output signal of the variable gain amplifier and outputting the offset removed result as the feedback signal. The variable gain amplifier includes a plurality of operational transconductance amplifiers.

A wavelength conversion member includes: a first wavelength converter containing a first wavelength converting material; a second wavelength converter containing a second wavelength converting material different from the first wavelength converting material; a first container member providing a space for accommodating the first wavelength converter; and a second container member facing the first container member and providing a space for accommodating the second wavelength converter. The first container member and the second container member may be at least partially fusion-bonded with each other.

The application provides a resonant frequency tracking system and method for a giant magnetostrictive transducer. A compensation circuit and an electrical signal sampling circuit are connected in series in a loop of the resonant frequency tracking system of the giant magnetostrictive transducer. The electrical signal sampling circuit measures and collects an electrical signal as sampling data andreturns the sampling data to the computer for processing through a data interface. According to the resonant frequency tracking system, real-time tracking of resonant frequencies of the giant magnetostrictive transducer is realized by setting relevant parameters such as a tracking increment, a tracking decrement, and an acquisition threshold. When a frequency drift of the resonant frequency tracking system of the giant magnetostrictive transducer is caused by a load change or a temperature rise change, tracking is carried out within a parameter range of tracking accuracy and tracking sensitivity by using the resonant frequency tracking system and method, so that energy conversion efficiency maximization is realized.

According to one aspect of the present disclosure, there is provided an apparatus that includes first, second, and third power converter stages connected to a transformer module. At least one of the first, second, and third power converter stages is a multi-level power converter stage that has multiple configurations to generate different output voltages from an input voltage.

An energy harvest terminal includes a distribution circuit that distributes input radio wave power to at least two branch paths, a main rectification circuit that converts first radio wave power supplied to one of the at least two branch paths from the distribution circuit into DC output power, a DC-DC converter that performs voltage conversion on the DC output power of the main rectification circuit, a sub-rectification circuit that converts second radio wave power supplied to another of the at least two branch paths from the distribution circuit into DC output power, and an electricity storage device connected to an output of the DC-DC converter. The DC-DC converter performs a feedback control for equalizing an output voltage of the main rectification circuit and an output voltage of the sub-rectification circuit.

The present invention relates to a photovoltaic power generation system performing maximum power point tracking for each unit group which performs separate maximum power point tracking for each photovoltaic string, maximizes the inversion efficiency of an inverter by maintaining uniform input voltage from the inverter regardless of the difference between generated energy and generated voltage for each photovoltaic string, and thus improves the photovoltaic power generation efficiency. A photovoltaic power generation system performing maximum power point tracking for each unit group according to the present invention comprises: a plurality of photovoltaic strings formed by connecting a plurality of photovoltaic modules; a string optima for converting voltage generated from each of the plurality of photovoltaic strings into an output voltage of a uniform size, and controlling, for the conversion of the generated voltage, the maximum power point tracking for each photovoltaic string; and an inverter for converting the output voltage from the string optima into alternating voltage and supplying the power system therewith.

The invention relates to an environment-friendly steam energy hot water production system. The environment-friendly steam energy hot water production system comprises a heating tank; a steam heating device is arranged in the heating tank; the steam heating device is used for ejecting the steam and pushing the water to form vortexes in the heating tank. According to the environment-friendly steam energy hot water production system, the steam is effectively recycled and accordingly the air pollution is avoided to a certain extent; the vortexes are formed through the steam when the steam is effectively recycled and accordingly the water can be significantly heated, meanwhile the steam is saved, and the conversion efficiency of the heat energy is maximized; the scale in the heating tank is reduced and the output hot water can directly meet the standard of the domestic water through a water quality purification device, the water is heated through the steam, and the steam energy is converted into the hot water.

A sound reproducing screen for an ultrasonic converting and reproducing method wherein a sound signal is carried on the ultrasonic wave which is transmitted via the screen which has a lattice structure in which a plurality of cells is continuously arranged. Using the screen, the sound signal can be divided from the ultrasonic wave, so that the sound signal can be reproduced. A cell structure of the screen is thus provided for converting the ultrasonic wave into the sound signal by ultrasonic conversion and reproduction which is simple to make and which has a maximum conversion efficiency. Accordingly, an efficiency of reproducing the sound source in a low frequency band as well as a high frequency band is superior, and a realistic three-dimensional sound system can be implemented.

The invention relates to an all-wind-direction combined multi-power permanent magnetic wind power generator which solves the problem that a set of a traditional impeller type wind generator cannot normally run, and the electric energy conversion efficiency is low due to influences of random changes of wind directions and speeds. An axial magnetic coupling reducer of the all-wind-direction combined multi-power permanent magnetic wind power generator is fixed at the top of a basic tower, a rotary shaft of a kinetic energy conversion device is sleeved on a moment input shaft of the axial magnetic coupling reducer, and a moment output shaft of the axial magnetic coupling reducer is fixedly connected with moment input shafts of a plurality of power permanent magnetic generators. The plurality of power permanent magnetic generators are arranged in the basic tower and connected in series. The kinetic energy conversion device comprises three semi-circle spherical surface blades, three connection rods and a rotary shaft sleeve, wherein the three semi-circle spherical surface blades are respectively connected with the rotary shaft sleeve through the three connection rods which are in the same plane and are distributed evenly along the peripheral direction. The all-wind-direction combined multi-power permanent magnetic wind power generator is suitable for the field of wind power generation.

Provided is a maximum power tracking device. The device includes: a battery outputting a first power; a switching unit changing the first power into a second power in response to a switching control signal; and a pulse modulation generation unit adjusting a pulse width of the switching control signal on the basis of the first power and adjusting a frequency of the switching control signal on the basis of the first power and the second power.

Devices and methods for safely using acid/chlorite ClO₂ generator chemistry for water treatment, whereby a valve prevents chemical draw unless there is both vacuum within the reaction chamber as well as suitable water volume in the flow chamber for dilution, are described. The float-dependent valve can also allow for direct venting from the reaction chamber to the flow chamber in the event of elevated pressure in the reaction chamber. This approach delivers an inherently safer ClO₂ generator design for systems that utilize high strength reactor zones with ClO₂ concentration above 3,000 ppm.

The present invention provides for an organic compound comprising electron deficient unit covalently linked to two or more electron rich units. The present invention also provides for a device comprising the organic compound, such as a light-emitting diode, thin-film transistor, chemical biosensor, non-emissive electrochromic, memory device, photovoltaic cells, or the like.