9results about How to "Improve fever" patented technology

The utility model provides a blood pump which comprises a rotor assembly, a stator assembly and a shell, the rotor assembly and the stator assembly are arranged in the shell in a spaced mode in the rotation axis direction of the rotor assembly, the rotor assembly comprises an impeller, a power magnetic ring and a center shaft, and the blood pump further comprises a first magnetic bearing assembly. The first magnetic bearing assembly comprises a first inner magnetic bearing and a first outer magnetic bearing which are matched with each other, the first outer magnetic bearing is arranged on the inner wall of the shell, and the impeller, the first inner magnetic bearing and the power magnetic ring are all fixedly arranged on the center shaft; the rotor assembly can rotate around the axis of the rotor assembly so as to drive fluid to flow into and out of the shell, and in the power-on state, the rotor assembly can be spaced from the stator assembly by a first preset distance in the rotating process. All the components of the rotor assembly are fixed on the central shaft, so that the stability of relative positions of all the components is guaranteed, the overall structural strength of the rotor assembly is improved, the stability of operation of the blood pump is guaranteed, and the service life of the blood pump is prolonged.

The embodiment of the utility model provides a charging circuit and a mobile power supply device, and belongs to the technical field of charging, the charging circuit comprises a wireless charging coil, a charging module, a power supply management module and a battery module, the wireless charging coil is used for supplying power to equipment to be charged; a first port of the charging module is connected with the wireless charging coil, and the charging module is used for being in communication connection with the to-be-charged equipment and obtaining charging voltage required by the to-be-charged equipment; a first port of the power management module is in communication connection with a second port of the charging module, and a second port of the power management module is connected with a third port of the charging module; the battery module is connected with the power management module; wherein the power management module is used for boosting the output voltage of the battery module according to the charging voltage, and according to the embodiment of the invention, the cost can be reduced while the charging efficiency is guaranteed, and the use experience of a user can also be improved.

The application discloses a single-phase photovoltaic energy storage converter and a control method thereof, relates to the technical field of photovoltaic charging and discharging control, and comprises a front-stage bidirectional power conversion unit, a rear-stage single-phase inversion unit, an integrated main control unit and a wide-voltage adaptation control unit. The input end of the front-stage bidirectional power conversion unit is used for being connected with a direct-current power supply, and the output end is connected with the direct-current bus end of the rear-stage single-phase inversion unit. The output end of the rear-stage single-phase inversion unit is used for being connected with a power grid or a load. The integrated main control unit is electrically connected with the front-stage bidirectional power conversion unit, the rear-stage single-phase inversion unit and the wide-voltage adaptation control unit respectively, and is configured to perform integrated collaborative control of double-mode switching, power conversion, battery management and energy scheduling. The wide-voltage adaptation control unit is connected with the front-stage bidirectional power conversion unit, and the front-stage bidirectional power conversion unit is configured to work in full-condition soft switching within a wide direct-current input voltage range.

This invention discloses a method and a motor for remanufacturing an asynchronous motor into a synchronous reluctance motor, relating to the field of motor remanufacturing and solving the problem of high-efficiency remanufacturing of asynchronous motors. This invention disassembles and recycles most of the materials from old, low-efficiency asynchronous motors, retaining the stator assembly and several accessories. New synchronous reluctance rotor laminations are manufactured and reassembled with the original asynchronous motor's stator assembly and accessories. The newly manufactured synchronous reluctance rotor laminations are equipped with several air grilles. This invention can improve the energy efficiency level of the original motor, achieving the performance of a high-efficiency motor. This technical method can improve the operating efficiency of old motors and make full use of existing materials, significantly reducing costs compared to purchasing a new high-efficiency motor, thus lowering the investment costs for users upgrading to high-efficiency motors.

The invention provides a semiconductor structure and a preparation method thereof, a chip packaging structure and a storage system, relates to the technical field of semiconductors, and aims to reduce the overall power consumption of the semiconductor structure, improve the heating problem of the semiconductor structure and improve the performance of the semiconductor structure. The semiconductor structure includes a plurality of dies disposed in a stacked manner. At least one of the dies includes a first portion and a second portion. In a cross section of the bare chip perpendicular to a first direction, the first portion and the second portion are adjacent to each other, and the first direction is a thickness direction of the bare chip. Wherein the first part comprises a storage unit array, and the second part comprises a storage and calculation integrated unit array. Comprising the semiconductor structure can be applied to a storage system to realize data reading and writing operations.

This utility model discloses an external device circuit for output control of a charging pile, specifically relating to the field of charging piles. It includes a PCB board on which a microcontroller unit, a Q14 input module, an optocoupler chip, a Q5 output module, and terminal blocks are integrated. This utility model outputs a high-level signal through the microcontroller unit and inputs it to the base of transistor Q14 through resistor R10. Under the action of resistor R342, the current flowing through the collector of transistor Q14 is approximately 20mA. At this time, the input current of the optocoupler is also 20mA. To ensure normal operation even under extreme conditions, the current transfer ratio of the optocoupler is minimized, resulting in an output current of approximately 10mA. In this case, transistor Q5 and the optocoupler combine to form a composite transistor to enhance the output current, preventing insufficient output drive capability when high current output is required. This circuit, which can be implemented with simple components such as optocouplers, transistors, and resistors, is low in cost.

The application relates to the technical field of mechatronic systems, and particularly discloses a low-temperature cold start control method based on high-frequency injection, which comprises the following steps: analyzing the motor state, observing and feedforward compensating the disturbance caused by the load torque and the viscous coefficient to the motor state through a sliding mode observer algorithm; obtaining a state equation according to the motor state, constructing an extended sliding mode observer equation, deriving an observer error equation, and observing the load torque; analyzing the obtained load torque, and reflecting the oil viscosity through the motor load torque; injecting high-frequency current under the low-temperature state according to the oil viscosity result, controlling the injection frequency, enhancing the skin effect, controlling the current amplitude, utilizing the copper loss and the high-frequency magnetic field eddy current effect to assist heat generation, gradually reducing the injection voltage amplitude according to the final oil viscosity result, the electromagnetic heat generation viscosity and the load reduction, and switching to normal id=0 control after reaching the normal start condition.

The utility model is suitable for the technical field of solar cells, and provides a back contact cell module and a photovoltaic system. The back contact battery assembly comprises a first battery string and a second battery string; the first battery string comprises a first battery piece, a second battery piece and a series welding strip, the series welding strip is electrically connected with an electric connection structure of a first polarity of the second battery piece and an electric connection structure of a second polarity of the first battery piece, the second battery string comprises a third battery piece, and the first battery piece is located between the second battery piece and the third battery piece; the bus bar is arranged on the first battery piece or the second battery piece; the insulating strip is used for electrically isolating the bus bar from the series welding strip; the parallel welding strip is electrically connected with the bus bar and electrically connected with the first polarity electric connection structure of the first battery piece and the third battery piece; the parallel solder strip comprises a first section, the first section is located between the bus bar and the first structure, and the resistance per unit length of the first section is smaller than the resistance per unit length of the series solder strip.

The application relates to a battery current probe multi-point synchronous detection structure and a rapid testing method thereof, and belongs to the technical field of battery current probe detection. Two current probes correspond to first and second current connection terminals respectively, and the two terminals are electrically isolated. The axial movable cooperation of the current probe and the probe fixing part and the elastic compression of the elastic part enable the compression process to have stroke compensation capability. The axial through hole of the current probe is integrated with the voltage probe combination part, so that voltage sampling can be arranged in the same body as the large-current probe and a stable sampling channel can be established under the same compression action, sampling errors caused by large-current wire voltage drop and connection state changes are reduced, and the temperature measuring part is arranged close to the contact end face, so that the problems that the single connection interface of the existing single-screw-column large-current probe in the hundreds-of-ampere battery test causes contact resistance fluctuation, is prone to heat and has poor adaptability, and it is difficult to simultaneously consider voltage sampling and contact area temperature acquisition under one-time compression are solved.