40results about How to "Output balance" patented technology

A high output level is maintained in power supplies having multiple cells in each leg. Failed cells in any leg are bypassed to provide a current path through the respective leg. All of the unfailed cells are utilized while maintaining equal magnitude between phases and a balance phase relationship in the line-to-line output voltage. The invention may be utilized in conjunction with a peak voltage reduction circuit, and a by-pass switch.

The invention relates to a control system and a control method for a three-phase four-bridge-arm permanent magnet synchronous motor. When a conventional three-phase three-bridge-arm main circuit topological structure is short of phase or has a single-phase broken fault, the safe and reliable running of a system is difficult to maintain, and the occasions with strict requirements on redundancy and reliability of a control system in aviation, navigation, explosion protection and the like are limited. The control system structurally comprises a main circuit, wherein the 220V single-phase alternating-current input (1) of the main circuit is connected with a single-phase rectification circuit (2); the single-phase rectification circuit is connected with a four-bridge-arm inverter (3); the four-bridge-arm inverter is connected with the permanent magnet synchronous motor (8) through a bridge arm A (4), a bridge arm B (5), a bridge arm C (6) and a bridge arm D (7); the bridge arm A, the bridge arm B and the bridge arm C are connected with a current sampling circuit (10); and the permanent magnet synchronous motor is connected with a photoelectric coded disc (11). The control system and the control method are used for controlling the three-phase four-bridge-arm permanent magnet synchronous motor.

The invention discloses a distributed photovoltaic and energy storage coordinated planning method and system based on second-order cone relaxation. The method includes the steps of S1, performing siting and sizing for a distributed power supply model to be constructed, and obtaining constraint conditions and a cost objective function; S2, performing relaxation and optimization on the constraint conditions and the cost objective function of the distributed power supply model by using a second-order cone algorithm, and obtaining transformed constraint conditions and a transformed cost objectivefunction; and S3, solving the transformed objective function in the step S2, and performing coordinated planning of photovoltaic and energy storage data by using the solving result. The method and system of the invention has the beneficial effects of being capable of storing or discharging energy according to the load demand, adjusting the photovoltaic output, and balancing the load; being capableof suppressing the fluctuation of the photovoltaic output within a certain range, and improving the quality of the photovoltaic output electric energy; and effectively simplifying the model and solving the objective function faster by relaxation and transformation of the model using the second-order cone algorithm.

The invention provides a broadband low-noise amplifier with single-end-to-difference capacity and a filtering function. The amplifier comprises three Gm stages, a feedback network and loads. The first Gm stage is connected with the second Gm stage in parallel, the two Gm stages connected in parallel are used as input, output of the first Gm stage enables differential signals to be converted into single-end signals through the feedback network, the single-end signals are fed back to a voltage input end to form a loop, and meanwhile, the output of the first Gm stage is overlapped with output of the second Gm stage through output of the third Gm stage. According to the broadband low-noise amplifier, broadband low noise amplification and LC narrowband filtering are realized, meanwhile, buffer stages or Gm stages do not need to be inserted between the first Gm stage and the second Gm stage, and therefore the linearity and the noise performance of the circuit are effectively improved. The broadband low-noise amplifier realizes the single-end-to-difference function and two routes of balanced output, and guarantees good IIP2 performance; a noise eliminating technology is used, and therefore transistor noise led in by impedance matching is eliminated.

A track-bound vehicle converter comprises a block-wave generator (20) configured to be connected to a direct voltage source (21) and connected to a series resonance link (34), or to an inductive link, for providing the input of a direct converter (41) with semi sinusoidal current pulses. The direct converter has at least one phase leg (42-44) having on one hand one switch (45-47) connected to the link (34) and able to block voltages in both directions thereacross and conduct current in both directions therethrough and on the other a capacitor (48-50) connected in series therewith. The voltage across the capacitor (48-50) of the direct converter is used to provide a converter output with an alternating voltage.

The invention provides a GAL gene regulation and control system. In the GAL gene regulation and control system, pCTR3 or pCTR1 is operably linked with a GAL80 gene, and pCUP1 is operably linked to a GAL4 gene. In experiments, the inventor unexpectedly finds that a copper ion inhibition type CTR3 gene promoter (pCTR3) or a CTR1 gene promoter (pCTR1) is adopted to replace a pGAL80 promoter (pGAL80),and a copper ion induction type CUP1 gene promoter (pCUP1) is adopted to replace a pGAL4 promoter (pGAL4), so that the GAL gene regulation and control system can realize expression control of a geneunder induction of copper ions, the yield of metabolic products of engineering bacteria carrying the GAL gene regulation and control system is remarkably improved, and the GAL gene regulation and control are not influenced by glucose concentration in the system.

The invention belongs to the technical field of microorganisms and discloses a compound microorganism culture for preparing carotenoid. The compound microorganism culture comprises bacillus subtilis,rhodopseudomonas capsulate and rhodotorula glutinis. The compound microorganism culture increases yield of carotenoid and lowers culture cost.

The invention provides a distribution valve, a material pumping system, a concrete pump and a fire pump truck. The distribution valve is used for pumping materials and comprises a wear-resisting plate, a material outlet pipe and at least two material inlet pipes, wherein the wear-resisting plate is provided with a plurality of holes; one end of each material inlet pipe is cooperated with one hole of the wear-resisting plate; the other end of each material inlet pipe is communicated with one end of the material outlet pipe; and the material outlet pipe and the material inlet pipes are swung under the driving of a driving mechanism. The invention also provides the material pumping system, the concrete pump and the fire pump truck. According to the technical scheme provided by the invention, the displacement of the pumping system is greatly improved by the distribution valve comprising the multiple material inlet pipes and one material outlet pipe, and the material pumping efficiency is improved. Meanwhile, an independent stirring system is omitted, the production cost is lowered, and good economic benefit is brought for production enterprises.

The present invention relates to a micro-grid power balance control method using a large power grid as virtual energy storage. According to the method, the large power grid connected with micro-grids is used as a virtual energy storage system; when the power of a distributed power supply in the micro-grids is insufficient, power in the large power grid is absorbed for powering the load in the micro-grids; and when the power of the distributed power supply in the micro-grids exceeds the required power of the load in the micro-grids, the output of the distributed power supply is controlled by a micro-grid power adjusting system so as to be strictly matched with the load in the micro-grids, such that the output power of the distributed power supply in the micro-grids flowing to the large power grid is lower than a preset threshold. By using the method, the output of the distributed power supply and the size of the load in the micro-grids can be balanced in real time, and the permeability of the distributed power supply in the large power grid is reduced at the maximum, thereby inhibiting the pollution of the energy quality of the large grid caused by the distributed power supply, and providing a basis for popularizing the application of the distributed power supply.

The invention relates to a VSG optical electricity-storage energy grid-connected power generation system. The system comprises a photovoltaic panel, a first direct current converter, an inverter and a power grid which are connected in sequence; a second direct current converter is connected between connecting lines of the direct current converter and the inverter in a lap joint mode; the second direct current converter is connected with a first energy storage device; and a load is connected between the connecting lines of the inverter and the power grid in a lap joint manner. The system is characterized in that an alternating current inverter is connected between the connecting lines of the inverter and the load in a lap joint manner; and the alternating current inverter is connected with a second energy storage device. Compared with the prior art, a photovoltaic module can always output at the maximum power on the basis of ensuring the output required power, and the working efficiency of the photovoltaic module is improved.

The invention relates to a storage battery cutting and recycle device, and belongs to the technical field of storage battery recycle equipment. The storage battery cutting and recycle device comprises a cutting device, a vibration device and a recycle and transmission device, wherein the cutting device comprises a power source, a push and press part and a cutter, the push and press part is connected with the power source by a belt, the cutter is fixed by an installation seat, the vibration device comprises a side plate, a skew bridge and vibration assemblies, the skew bridge is arranged at a middle part of the side plate, the vibration assembles are fixed above the skew bridge, the recycle and transmission device comprises a shell cover recycle transmitter, a welding plate conveying belt, a welding plate recycle transmitter and a shell recycle transmitter, the shell cover recycle transmitter is arranged below the cutter, the welding plate conveying belt is arranged on a support and is arranged below the side plate, the welding plate recycle transmitter is arranged below a tail end of the welding plate conveying belt, and the shell recycle transmitter is arranged below a tail end of the skew bridge. The storage battery cutting and recycle device is simple and compact in structure, relatively low in cost and high in automation, a storage battery can be rapidly cut, separated and recycled, lead plates about 120 tons can be cut and separated by the device working in a single line for 8 hours, and the efficiency of the device is 40 times of that of manual operation.

An optical sensor includes an array of pixels configured to convert photons into electrons for forming an image or to measure spectral content without forming an image. A filter assembly is operatively associated with the array of pixels for passing predetermined bandwidths of photons to the array of pixels. A mask is operatively associated with the array of pixels and the filter assembly. The mask includes a plurality of apertures each for limiting photons passing through the filter assembly to a respective pixel in the array of pixels.

The invention discloses a method for balancing camellia oleifera tree growth and fruit growth, which is characterized in that cytokinin CPPU and gibberellin with specific concentration and specific times are respectively sprayed on the camellia oleifera trees in a full bearing period in different time from June to August, the number of young shoots of the camellia oleifera is increased by 0.30-0.24 times, the biomass of the young shoots is increased by 0.34-0.49 times, the weight of single fruit seeds is increased by 1.79-2.26 times, and the oil yield is increased by 0.19-2.55 times. By adopting the method, tree growth, fruit growth and grease transformation can be promoted at the same time, and camellia oleifera tree growth and camellia oil yield are balanced.

The invention discloses a power station boiler air pre-heater anti-blocking device which comprises an air pre-heater, a variable frequency speed governing module is connected to the air pre-heater, an exhaust gas temperature monitoring module is arranged on the air pre-heater in a matched mode, the variable frequency speed governing module is connected with an anti-blocking control module, and the anti-blocking control module is connected with the exhaust gas temperature monitoring module. The problem that in the prior art, the engineering reconstruction amount is large is solved.

The invention discloses an electric motor coach dual-power driving system and a torque distribution method, and relates to the technical field of pure electric motor coaches. The electric motor coachdual-power driving system comprises a first power battery, a first high-voltage power distribution cabinet, a first motor controller and a first motor which are connected in sequence, and further comprises a second power battery, a second high-voltage power distribution cabinet, a second motor controller and a second motor which are connected in sequence; the first motor and the second motor rotate coaxially and transmit driving force to a front axle or a rear axle through a transmission shaft. According to the invention, two sets of driving systems which operate independently are configured,the two motors in the driving systems rotate coaxially, and the torques are superposed to jointly drive the front axle or the rear axle, so that the phenomenon of single-motor overheating caused by continuous large-torque output can be avoided, the output balance of the two batteries can be ensured, the condition of single-battery overload is avoided, therefore, the service lives of the motor andthe batteries are effectively prolonged, and the stability and reliability of the driving system are improved.

A power conversion system is to be used with an energy source. A plurality of conversion units are used in series via their output with the energy source output. A positive pin of a first converter and the negative pin of a last converter of the series are for connection to an output (14, 16) of the energy source, and for each two neighboring converters in this series a negative pin of an upstream converter is connected to a positive pin of a downstream converter which both pins are decoupled from the energy source except for the positive pin of the first converter and the negative pin of the last converter. A master monitor unit is adapted to monitor the output power of the energy source and to control the input voltage of each conversion unit synchronously in dependence on the monitored output power. In this way, a set of conversion units are configured, with the conversion units sharing the output from the energy source. This provides a scalable system.

The invention belongs to the technical field of microorganisms and discloses a compound microorganism culture for preparing carotenoid. The compound microorganism culture comprises bacillus subtilis,rhodopseudomonas capsulate and rhodotorula glutinis. The compound microorganism culture increases yield of carotenoid and lowers culture cost.

The invention discloses a bolt special for an internally and externally shielded cable material, comprising a feeding section and a compression section as well as a homogenization section arranged at the front end of the bolt. A threaded section for preventing materials from refluxing is also arranged at the end part of the feeding section, the bolt diameter of the compression section is gradually increased along the axial direction of the bolt, the bolt groove depth of the compression section is gradually reduced along the axial direction of the bolt, the bolt diameter of the feeding sectionis smaller than that of the homogenization section, the feeding section, the compression section and the homogenization section have identical thread pitch, the bolt length of the homogenization section is smaller than that of of the compression section, and the bolt length of the compression section is smaller than that of the feeding section. The bolt special for the internally and externally shielded cable material ensures that the internally and externally shielded cable material is fully, tightly and evenly compressed during the conveying and ensures the product quality; and the bolt diameter of the homogenization section is larger than that of the feeding section so that the internally and externally shielded cable material is stably fed, the homogenization section outputs in balance, the melting and extruding speeds are increased, and the production efficiency of enterprises are increased.

A condenser microphone that provides a balanced output of audio signals from initial steps of a diaphragm and a fixed electrode is provided. The condenser microphone includes: a condenser microphone unit including a diaphragm being arranged opposite a fixed electrode; a first impedance converter being connected to the fixed electrode of the condenser microphone unit and outputting a first electric signal generated in the fixed electrode; and a second impedance converter being connected to the diaphragm of the condenser microphone unit and outputting a second electric signal generated in the diaphragm. By this structure, balanced outputs of the audio signals having phases reverse to each other are provided by the first and second impedance converters immediately after the condenser microphone unit.

The invention provides a method for controlling biennial bearing of a fruit tree. The method includes applying a micromolecule inducer to conduct reasonable control on the high-yield year and low-yield year of the fruit tree to balance the yield of the fruit tree in the high-yield year and the lower-yield year and ensure the fruit quality. By means of the method, good economic benefit is achieved.

The invention relates to an embedded dual-layer rolling harmonious reducer which comprises an input end assembly and is characterized in that a connecting shaft is sleeved on the periphery of the input end assembly, and inner layer external gears are connected to the periphery of the connecting shaft through an inner layer internal gear assembly. Meanwhile, a bearing assembly is sleeved on the peripheries of the inner layer external gears, an accommodating space is arranged at the middle section of the bearing assembly, an outer layer internal gear assembly is sleeved on the periphery of the accommodating space, and outer layer external gears are sleeved on the periphery of the outer layer internal gear assembly. Therefore, through meshing of two gears with a position difference of 180 DEG, the embedded dual-layer rolling harmonious reducer obtains the output of two times of torque compared with that of the single-layer rolling harmonious reducer, has more balance of couple and more stable output of the integral structure, and works more stably. Meanwhile, the inner layer external gears are used for dual cylinders to be meshed with the outer layer external gears, so that embedded dual-layer rolling harmonious reducer has more compact structure, higher precision, higher rigidity and difficulty in damage.

The invention provides an electromagnetic control remote pilot control valve. The electromagnetic control remote pilot control valve comprises a valve body, an oil return cavity, an oil inlet cavity,a control oil channel and a valve core cavity are formed in the valve body, a valve core mechanism and a ejector rod bush are arranged in the valve core cavity, the ejector rod bush is internally provided with a hollow ejector rod, a damping core is arranged in the hollow ejector rod, a convex block is arranged at the lower part of the damping core, damping springs are arranged on the periphery ofthe damping core, the lower ends of the damping springs are in contact with the damping core, a spring seat is arranged at the lower part of the hollow ejector rod, a through hole is formed in the spring seat, a valve core is arranged in the through hole, the upper end of the valve core extends into the hollow ejector rod to be in contact with the damping core, the middle part of the valve core is provided with a first boss, a second boss is arranged at the lower part of the valve core, an upper u-shaped groove is formed in the side wall of the first boss, a lower u-shaped groove is formed inthe side wall of the second boss, a pressure plate is arranged on the valve body, and a proportional electromagnetic valve is arranged on the pressure plate. The valve has the advantages that the operation performance is excellent, remote control can be realized, the balance of the output of the force of the proportional electromagnetic valve is realized, and the operation is gentle.