42results about How to "Uniform output power" patented technology

The invention relates to the electric power electronic technical field, and discloses a DC-DC converting circuit which comprises N unit converting circuits, M inductance units, a circuit input positive terminal, a circuit input negative terminal, a circuit output positive terminal and a circuit output negative terminal. The input positive terminal of the first unit converting circuit is in connection with the circuit input positive terminal through an inductance unit, and is directly in connection with the circuit input positive terminal; the input negative terminal of a Kth unit converting circuit is in connection with the input positive terminal of a (K+1)th unit converting circuit through the inductance unit or is directly in connection with the input positive terminal of a (K+1)th unit converting circuit; K, M and N are all natural numbers, KN, and 1=M=(N+1). The input negative terminal of an Nth unit converting circuit is in connection with the circuit input negative terminal through the inductance unit or is directly in connection with the circuit input negative terminal; the outputs of the N unit converting circuits are in parallel connection or in series connection, and are in connection with the circuit output positive terminal and the circuit output negative terminal. The DC-DC converting circuit reduces the cost, eliminates or reduces common mode interference, realizes interleaving control, decrease input and output current ripples, and is in favor of reducing filters and implementation difficulty.

The present invention belongs to the field of integrated photoelectronic technology, and is especially one kind of 1xN light power shunt with low loss, small size and homogeneous power output. The 1xN light power shunt includes N cascade T-shaped shunts, and each of the T-shaped shunts includes one multimode interference waveguide, one monomode incident waveguide serving as the input of T-shaped shunt, one output waveguide divided with one V-groove into two sections serving as two outputs of the T-shaped shunt, and one light power modulating module.

A tunable distributed feedback (DFB) semiconductor laser based on a series mode or a series and parallel hybrid mode. A grating structure of the laser is a sampling Bragg grating based on the reconstruction-equivalent chirp technology. DFB lasers with different operating wavelengths based on the reconstruction-equivalent chirp technology are integrated together by a sampling series combination mode or a series/parallel hybrid mode, one of the lasers is selected to operate via a current, and the operating wavelength of the laser can be controlled by adjusting the current or the temperature, so that the continuous tuning of the operating wavelengths of the lasers can be realized. Various wavelength signals in parallel channels are coupled and then output from the same waveguide. An electrical isolation area (1-11) is adopted between lasers connected in series or lasers connected in series and connected in parallel to reduce the crosstalk between adjacent lasers.

The invention discloses a wind power blade. The wind power blade is formed by three layers of materials. The first layer is a glass fiber fabric layer. The second layer is a carbon fiber layer. The third layer is a glass fiber fabric layer. A +/-45-degree angle is formed by the glass fiber fabric layer in the first layer and the glass fiber fabric layer in the third layer, and the carbon fiber layer in the second layer is clamped between the glass fiber fabric layer in the first layer and the glass fiber fabric layer in the third layer. Carbon fibers are used, therefore, the weight of the wind power blade is reduced, the rigidity is improved, the aerodynamic performance of the wind power blade is improved, and loads on a tower and a blade shaft are reduced. Therefore, the output power of a fan is smooth and balanced, and the energy efficiency is improved. Meanwhile, the carbon-fiber blade is thin, the appearance design is effective, the wind power blade is thin and long, and the energy output efficiency is also improved.

The invention relates to a balanced modulation method suitable for a cascaded H-bridge multi-level inverter, and belongs to the technical field of PWM (Pulse Width Modulation) of a multi-level converter. According to the method, based on a double triangular carrier period, a triangular carrier is periodically circulated between different carrier layers, and compared with a sinusoidal modulation wave, an optimized pulse signal is generated. According to the method, the power balance control of each cascade unit can be realized, the direct current side power supply discharge is kept consistent, and the quality of the output voltage of the inverter is further improved; the time required for power equalization can be reduced; and meanwhile, the optimal line voltage harmonic elimination performance can also be realized. In addition, the method can be expanded to n cascade units, so that the practicability of the inverter is improved.

The invention provides a voltage adjustment method, a direct-current microgrid and a computer readable storage medium. The method comprises the steps of determining an energy storage unit in a charging state as an energy storage target unit, and obtaining a voltage reference value, a current state-of-charge value, an influence coefficient and an average state-of-charge value corresponding to the energy storage target unit; determining a voltage adjustment value according to the influence coefficient, the voltage reference value, the state average value and the current state-of-charge value; obtaining output power corresponding to the energy storage target unit and a preset droop coefficient; constructing a corresponding relationship among the voltage adjustment value, the output power, thedroop coefficient and the bus voltage of the direct-current microgrid; and if it is determined that the current state-of-charge value is not in the preset range, adjusting the voltage reference valuebased on the corresponding relationship to adjust the bus voltage so as to enable the bus voltage to be within the preset voltage range. The service life of a battery corresponding to the energy storage unit in the direct-current microgrid is prolonged, and the stability and robustness of the direct-current microgrid are improved.

The invention discloses a frequency stabilizer for a multi-wavelength fiber laser. The frequency stabilizer is characterized in that an adjustable light source (1), a first optical coupler (2), a first optical circulator (4), a wavelength division multiplexer (7), a second optical circulator (9), a high-nonlinearity optical fiber (10) and a pumping light source (11) are included, the adjustable light source (1), the first optical coupler (2), the first optical circulator (4), the wavelength division multiplexer (7), the second optical circulator (9) and the high-nonlinearity optical fiber (10)are sequentially connected, and the pumping light source (11) is connected with the wavelength division multiplexer (7). According to the frequency stabilizer, fiber system integration is easy, the output power of the multi-wavelength fiber laser is effectively balanced, and the output bandwidth of the multi-wavelength fiber laser is increased.

The invention discloses a solar heat energy power system based on an eccentric turbine. The solar heat energy power system comprises a heat collection device, a gasifying device, the turbine, a condensation device and a one-way hydraulic pump, all of which are in circular communication sequentially through a circulation pipeline; circular working media are contained in the circulation pipeline, the heat collection device and the gasifying device are mounted in a solar light condensing cover, the condensation device is arranged outside the solar light condensation cover, the eccentric turbine comprises a turbine main case, a rotating turbine structure, an air inlet and an exhaust opening, a rotating shaft of the rotating turbine structure is eccentrically mounted in the turbine main case, and the air inlet and the exhaust opening are distributed in the two radial sides of the turbine main case. The solar heat energy power system based on the eccentric turbine has the beneficial effects of being high in heat energy conversion efficiency, large in turbine torque, adjustable in power and the like.

The invention discloses a method and system for regulating power balance of a remote adhesive tape conveying machine. The remote adhesive tape conveying machine adopts a hydraulic motor head-tail cooperation drive mode. The method for regulating the power balance comprises the steps of: respectively obtaining operation parameters of a machine head motor and a machine tail motor, wherein the operation parameters comprise oil pressure values and rotating speeds of the machine head motor and the machine tail motor; determining the oil pressure proportion of the machine head motor and the machine tail motor; when the oil pressure is not in a preset range, determining the expect rotating speed of the machine tail motor according to the oil pressure proportion and the rotating speed of the machine head motor; and regulating the rotating speed of the machine tail motor to the expect rotating speed by using a proportion integral derivative regulating mode. Compared with the prior art, the invention can improve the operation stability and reliability of the remote adhesive tape conveying machine and enhance the production efficiency.

The invention relates to a concave-convex rotor motor, which can supply a motor with better sealing, fully burned fuel, simple structure and stable operation. Two ends of cylinder individually comprises the outer end cover, inner end cover, main axle and auxiliary axle; the inner space of cylinder via the middle baffle plate is divided into at least chambers in same structure, while each chamber is in reverse-8 shape and concentric with the main and auxiliary axles; the main axle of each chamber is connected to a convex-teeth rotor with U-shape sheath; the auxiliary axle is connected to a concave-teeth rotor whose teeth root has a rolling sealing sheet; the tops of said concave-teeth rotor and convex-teeth rotor are slide connected to the inner wall of said chamber; the phase difference between two concave-teeth rotors in two chambers and the phase difference are 180 degree/teeth number; and the middle baffle plate has a spark plug and a fire guide hole. The invention has stable operation, lower noise, improved abrasion degree, prolonged service life, reduced fire delay and better safety.

The invention provides a power supply unit, a power supply device and a power supply system, wherein the power supply unit is a first power supply unit in the power supply device, and the first power supply unit is used for obtaining an actual output voltage of each power supply unit in the power supply device when a load demand current value is higher than an output current limit value of the first power supply unit; determining an output voltage average value according to the actual output voltages of the power supply units; and sending the output voltage average value to each second power supply unit, wherein the output voltage average value is used for each second power supply unit to execute the following operations: determining an output voltage setting value of the second power supply units according to the output voltage average value, wherein the output voltage setting values determined by the second power supply units according to the output voltage average value are the same. The power supply unit provided by the invention is applied to the power supply device with serially connected outputs, so that the balance of output power of different power supply units in the power supply device is favorably maintained, the service life of all the power supply units and the whole power supply device is prolonged, and the reliability of the power supply device is improved.

The invention discloses an improved hybrid modulation method suitable for a hybrid cascaded H-bridge multi-level inverter with a voltage ratio of 1: 1: 2, and belongs to the technical field of PWM of multi-level converters. According to the method, a high-voltage unit and a low-voltage unit are independently controlled, a high-voltage part adopts the step wave modulation to obtain a pulse signal of the high-voltage unit, and a low-voltage part adopts the hybrid modulation combining step wave modulation and PWM modulation, wherein the PWM modulation adopts a single-carrier modulation mode similar to unipolar frequency multiplication. The two modulation methods are sequenced, and the low-voltage unit is modulated in a 1/4 period cycle manner to obtain an optimized pulse signal of the low-voltage unit. According to the method, the equivalent switching frequency of the output voltage of the inverter is improved, the power loss consistency of in-phase and inter-phase switching tubes of the low-voltage units is realized, meanwhile, the output power balance control among the low-voltage units is realized, and the practicability of the inverter is improved.

The invention discloses an internal combustion engine tail gas utilization heat energy power system based on honeycomb cavity gasification. The system comprises a gasifying device, a turbine, a condensing device and a one-way hydraulic pump, wherein the gasifying device, the turbine, the condensing device and the one-way hydraulic pump communicate in a circulating mode in sequence through circulating pipes; the circulating pipes are filled with circulating working mediums; a heat collecting device is mounted at the external of the gasifying device, and is communicated with an internal combustion engine tail gas pipe; the gasifying device includes a gasification cavity; the gasification cavity is a cavity for realizing gasification of a working medium in the gasifying device; the gasifying device is positioned in a heat collecting cavity; and the gasification cavity takes the shape of a honeycomb cavity. The internal combustion engine tail gas utilization heat energy power system based on honeycomb cavity gasification has such advantages as high gasification efficiency, high heat energy conversion efficiency and power adjustability.

The invention discloses a gas heat energy power system based on honeycomb cavity gasification. The gas heat energy power system based on honeycomb cavity gasification comprises a gasifying device, a turbine, a condensing device and a one-way hydraulic pump for realizing circulating communication through circulating pipes; circulating working mediums are filled in the circulating pipes; the heat collecting device is mounted at the external of the gasifying device, and is communicated with a gas heating furnace; the gas heating furnace includes a gas inlet, an air inlet, a mixed gas combustion cavity and an igniter; the gasifying device includes a gasification cavity; the gasification cavity is a cavity for realizing gasification of a working medium in the gasifying device; the gasifying device is positioned in a heat collecting cavity; and the gasification cavity takes the shape of a honeycomb cavity. The gas heat energy power system based on honeycomb cavity gasification has such advantages as high gasification efficiency, high heat energy conversion efficiency and power adjustability.

The invention discloses a novel power balance modulation strategy suitable for a cascaded H-bridge multi-level converter, and belongs to the technical field of multi-level PWM converters. The method is based on the idea of carrier reconstruction and carrier degree-of-freedom recombination, and comprises the following steps: firstly, reconstructing three triangular carriers so that the three triangular carriers are uniformly distributed among different layers for periodic circulation; secondly, adjusting the vertical degree of freedom of the sinusoidal modulation wave; and comparing the modulated wave with a carrier wave to obtain an optimized PWM pulse signal. According to the method, power balance among the output units can be realized, so that direct-current voltage discharge is kept consistent, and the output voltage quality of the converter is improved; the time required for balancing is shortened to the maximum extent; and meanwhile, the consistency of the average switching frequency is also realized. In addition, the method can be expanded to n cascade units, so that the practicability of the converter is improved.