9results about How to "Increased power output capability" patented technology

The invention discloses a silicon carbide power module dynamic current sharing method and system, and the method comprises the steps: setting a basic layout of a multi-chip parallel silicon carbide power module, and extracting circuit parasitic parameters; setting working conditions of the silicon carbide power module, and setting bus voltage, load current and power chip switching speed; setting the maximum allowable voltage overshoot, and limiting the total capacitance value of the distributed decoupling capacitor bank according to the voltage overshoot; and according to the equivalent impedance of the parallel branches at the set switching speed after the distributed decoupling capacitor bank is added, the capacitance value of the distributed decoupling capacitor is adjusted, so that the equivalent impedance of each branch is the same. By integrating the distributed decoupling capacitors, the problem of non-uniform current distribution in the traditional parallel connection technology is solved, and the method has important theoretical and practical significance for improving the performance of a power electronic system.

The application provides a large vertical machine tool water-cooling oil-immersed direct-drive permanent magnet driving motor, which comprises a base and a work rotary table, an annular cavity is arranged in the base, a rotor assembly and a stator assembly are arranged in the annular cavity, the rotor assembly is installed on the work rotary table, the stator assembly is installed on the base, a cross roller bearing is arranged between the base and the rotor assembly, an inner ring of the cross roller bearing is installed on the base, and an outer ring is installed on the rotor assembly; an encoder is arranged between the base and the work rotary table; the annular cavity is filled with cooling machine oil to form an oil-immersed cooling system, a water cooling assembly is further arranged in the annular cavity, and an oil inlet and outlet interface is arranged at the bottom of the base and is communicated with the annular cavity. Through the above structure, the application has high cooling efficiency, direct driving without gap, high carrying capacity, and is suitable for heavy load high-precision machining above 10T.

The invention relates to the technical field of optical storage power generation systems, and discloses a flexible grid connection method for industrial and commercial optical storage power generation systems. The flexible grid connection method for the industrial and commercial optical storage power generation system comprises the following steps: after the optical storage power generation system starts to operate, information about whether a grid connection condition is met is obtained through communication with an inverter, the maximum power point of a photovoltaic array is tracked, and energy scheduling strategies under various working conditions are judged in real time; the power flow of each power generation unit of the system is coordinated and controlled, the efficient and stable operation of the system is maintained, the working mode of the energy storage controller is divided into a photovoltaic grid-connected mode and a photovoltaic energy storage grid-connected mode, and the modes can be switched through a change-over switch; according to the invention, the grid-connected converter is controlled to carry out flexible grid-connected power generation according to the photovoltaic output power curve, the advantages of the optical storage power generation system are fully exerted, and the expandability is high; the charging and discharging times of the energy storage battery are effectively reduced, and the power output capability of the system is improved.

The utility model discloses a portable super quick charge charger belongs to charger technical field, including lower cover, the one side of lower cover is provided with the folding plug module, and the inside bottom of lower cover is provided with the fin no. 2, and the upper end of fin no. 2 is provided with the heat conduction silica gel piece, and the upper end of heat conduction silica gel piece is provided with the mica sheet, and the one side of mica sheet is provided with a plurality of type C interfaces, and the one side of type C interface is provided with a plurality of USB A interfaces, and the upper end of mica sheet is provided with the fin no. 1, and the upper end of fin no. 1 is provided with the upper cover, the utility model discloses a setting USB A interface and type C interface can satisfy the charging demand of various equipment, guarantee the high compatibility of equipment use, and gallium nitride quick charger has high power output capacity, can shorten the charging time greatly, and the heat loss is lower, makes charging efficiency higher, through adopting gallium nitride material, the volume and weight of charger can be reduced, and it is convenient to carry.

The quadrupole permanent magnet motor comprises a base and a motor shell installed on the upper portion of the base, a grinding cavity is formed in the upper portion of the motor shell, a rotating shaft is installed on the upper portion of the center of the base, and a motor rotor is installed on the outer side of the rotating shaft. Four motor stators are installed in the motor shell in an annular array mode, and the four motor stators are wound on the outer side of the motor rotor. According to the four-pole motor, the four motor stators are arranged to form the four-pole motor, the end degree span of the four-pole rotor is only half of that of a two-pole motor, compared with the two-pole motor with the same power, the height of the end part of the rotor is reduced by nearly half, and the height of the grinding cavity is higher under the same height; in addition, a quadrupole motor generally has higher power output capability than a dipolar motor; the torque is more stable than the torque of a two-pole motor, and the starting torque is higher and the torque range is wider than that of the two-pole motor.

The invention provides a light control system, method and equipment, and relates to the technical field of mining explosion-proof electrical equipment. The light control system comprises a power supply conversion device, a power supply distribution device and an intrinsic safety electrical device which are connected in sequence, the intrinsic safety electrical device comprises a plurality of intrinsic safety electrical units, and each intrinsic safety electrical unit is connected with the power supply distribution device; the power supply conversion device is used for converting non-intrinsic safety direct current into intrinsic safety direct current when receiving the non-intrinsic safety direct current and transmitting the intrinsic safety direct current to the power supply distribution device; the power supply distribution device is used for determining the intrinsically safe electrical subunits needing power supply according to the working mode of the light control system and transmitting the intrinsically safe direct current to the corresponding intrinsically safe electrical subunits; the intrinsic safety electrical unit is used for carrying out light control when receiving the intrinsic safety direct current. According to the invention, the flexibility of the system is improved, and the power distribution is more accurate.

The application provides a lithium iron phosphate positive electrode active material, a preparation method of the lithium iron phosphate positive electrode active material, a positive electrode sheet, a battery, a battery pack and an electric device. 16 spins / g~2.0000×10 16 spins / g. The lithium iron phosphate positive electrode active material provided by the application has a high compaction density and has normal temperature rate discharge and low temperature discharge performance.

The utility model provides a kind of micron linear drive device, including shell, base, reducer box shell and by shell, the internal space being enclosed by reducer box shell and base jointly, internal space is integrated with miniature motor, reducer, screw mechanism and sensor, the motion control single-chip microcomputer drive board of motor and the embedded processing circuit board of sensor signal processing;Single-chip microcomputer drive board is electrically connected with miniature motor, the input end of reducer is connected to the output end of miniature motor, screw mechanism includes screw nut and screw rod, and the output end of reducer is connected to screw rod, and screw nut connection is equipped with screw nut fixing seat, and screw nut fixing seat is connected with external shaft, and external shaft extends base;Embedded processing circuit board is electrically connected with sensor, and single-chip microcomputer drive board is electrically connected with embedded processing circuit board, and sensor is used to detect the position change of external shaft, and male plug is provided on base, and male plug is connected with single-chip microcomputer drive board.

The invention relates to the field of packaging technology, and discloses a packaging structure of a power semiconductor packaging device, comprising: a plastic package body and a heat dissipation base plate partially embedded in the top of the plastic package body, wherein a double-sided copper-clad ceramic substrate 1, a power chip, a metal heat conductive sheet, a double-sided copper-clad ceramic substrate 2 and a lead frame are encapsulated in the plastic package body; the first electrode of the power chip is connected to the bottom of the heat dissipation base plate through the double-sided copper-clad ceramic substrate 1, the second electrode is connected to the double-sided copper-clad ceramic substrate 2 through the metal heat conductive sheet, and the lead frame is connected to the double-sided copper-clad ceramic substrate 1. The invention arranges a heat dissipation component to transfer the heat generated by the power chip when it is working to the heat dissipation base plate in a heat conduction manner through the double-sided copper-clad ceramic substrate 1, and the second electrode is transferred in a heat conduction manner through the double-sided copper-clad ceramic substrate 2, and the heat is insulated and dissipated from both sides of the power chip, thereby effectively reducing the thermal resistance of the power chip and increasing the power output capacity of the power chip.