37results about How to "Reduce heat source" patented technology

Disclosed are an electric motor and an electric vehicle having the same. The electric motor includes a stator including a stator core and a stator coil wound around the stator core, a rotor disposed to be rotatable with respect to the stator, and a cooling unit configured to allow a cooling fluid to flow therein and disposed to be in contact with the stator to cool the stator, wherein an outer surface of the stator core includes grooves in which the cooling unit is inserted. Cooling performance can be enhanced by shortening a heat transmission path, and the cooling unit can be easily fabricated and coupled.

The invention discloses a load driving device, comprising a voltage-stabilizing and current-stabilizing main circuit, a sampling unit and an output current controller, wherein the voltage-stabilizing and current-stabilizing main circuit is used for converting input voltage and providing electric energy for a post-stage load unit under the control of the output current controller, the sampling unit is connected with the output terminal of the voltage-stabilizing and current-stabilizing main circuit and is used for sampling output characteristic parameter of the voltage-stabilizing and current-stabilizing main circuit; and the output current controller is used for controlling a current-limiting point of the voltage-stabilizing and current-stabilizing main circuit, a steady state operating point of the voltage-stabilizing and current-stabilizing main circuit is determined according to regulating direction of the current-limiting point and variation of the output characteristic parameter of the voltage-stabilizing and current-stabilizing main circuit before and after being regulated, and the voltage-stabilizing and current-stabilizing main circuit is controlled to operate at the steady state operating point. The load driving device disclosed by the invention can improve reliability of a driver; meanwhile, complexity of the circuit can be reduced. The invention also discloses a control method and device.

Disclosed are an electric motor and an electric vehicle having the same. The electric motor includes a stator including a stator core and a stator coil wound around the stator core, a rotor disposed to be rotatable with respect to the stator, and a cooling unit configured to allow a cooling fluid to flow therein and disposed to be in contact with the stator to cool the stator, wherein an outer surface of the stator core includes grooves in which the cooling unit is inserted. Cooling performance can be enhanced by shortening a heat transmission path, and the cooling unit can be easily fabricated and coupled.

The invention discloses a cutting frequency conversion control device for a cantilever-type coal mine heading machine and a control method of the cutting frequency conversion control device. The device comprises a pre-charging and switching unit, an input reactor, a rectifier, an intermediate DC loop, an inverter, a controller and a sensor unit, wherein the output end of the pre-charging and switching unit is used for supplying power to a heading motor of the cantilever-type coal mine heading machine sequentially through the input reactor, the rectifier, the intermediate DC loop and the inverter, and the output end of the controller is connected with a controlled end of the inverter. The method comprises the following steps of: judging whether regenerative braking is required or not, generating a negative torque closed-loop control quantity by taking the voltage of the intermediate DC loop as a feedback quantity when the regenerative braking is required, and outputting the negative torque closed-loop control quantity to the inverter so as to control a motor to consume regenerative energy. The cutting frequency conversion control device and the control method thereof have the advantages that the regenerative energy can be consumed in no need of a chopper circuit, the material cost can be saved, the installation space is reduced, the cooling of an electrical cabinet of a frequency converter is improved, and convenient construction is achieved.

The invention discloses a semi-continuous microwave catalytic thermal cracking reactor. The semi-continuous microwave catalytic thermal cracking reactor of a vertical structure comprises a heating chamber, a microwave heating source and a catalytic static bed device. The cross section of the heating chamber is orthohexagonal. An inner quartz reaction cavity is formed in the heating chamber. Materials react in the inner quartz reaction cavity. Two groups of umbrella-shaped partition boards are arranged in the inner quartz reaction cavity. The upper umbrella-shaped structure is smaller than the lower umbrella-shaped structure in each group so as to enable the materials to slide down from top to bottom, and accordingly, motion paths of the materials are increased. The umbrella-shaped partition boards can be rotated according to needs. Three groups of microwave heating sources extending to the heating chamber are provided. The axes of each group of microwave heating sources do not coincide so as to reduce mutual interference. The catalytic static bed device can be mounted in the reactor, the reactor is provided with two temperature measurement openings, and one of the temperature measurement openings is used according to needs. The semi-continuous microwave catalytic thermal cracking reactor has the advantages that biomass conversion rate can be increased, heating stability can be improved and heating and catalyzing are integrated, and can be applied to the fields such as energy and chemical industry.

The invention relates to a power supply source control device for an airplane, and belongs to the field of aviation electronics. The power supply source control device comprises a shell, a generator arranged in the shell, an excitation control module, an excitation storage battery, a current-limiting insurance 5A and a master control device arranged outside the shell, wherein the master control device comprises a storage battery interface, a ground power interface, a relay J1, a relay J2 and a relay J3 and a bus bar; coils of the relay J1 and the relay J2 are connected between the storage battery interface and the ground in parallel; a normally open contact J1-1 of the relay J1 is connected to the bus bar; the bus bar is connected with the coil of the relay J3 and one of power supply ends of the bus bar is connected to the excitation control module through an excitation control protection switch K1; the excitation control module is connected with a corresponding pin of the generator; the excitation storage battery, a work indicating lamp L and the current-limiting insurance 5A are connected in series and then connected to the power supply end of the excitation control module; and a positive electrode of a power supply of the generator is connected with a normally open contact J3-1 of the relay J3 through a switch S1. The power supply source control device for the airplane has the advantages of being low in cost, high in reliability, good in heat dissipation performance, safe and stable.

The invention relates to the technical field of intelligent wearing, in particular to intelligent wearable equipment. The intelligent wearable equipment comprises a shell, a PCBA assembly, a battery and a display screen module, wherein the PCBA assembly is arranged in the shell, the battery is arranged at the bottom of the shell and is arranged blew the PCBA assembly, and the display screen moduleis arranged at the top of the shell and is arranged above the PCBA assembly. By the intelligent wearable equipment, the heat dissipation performance of the intelligent wearable equipment can be optimized.

A double-sided rotary refrigerator comprises a cabinet, an evaporator, a condenser, a compressor and a control circuit board, wherein a fridge and an ice bar are arranged on the front side and the back side of the cabinet respectively; a non-transparent heat-insulating door is arranged on the fridge side; a transparent door is arranged on the ice bar side; the fridge and the ice bar are partitioned by a central partition board; a freezing chamber and a cold storage chamber are formed in the fridge side; the evaporator is arranged inside an evaporation chamber beside the freezing chamber; a cold air fan is arranged inside the evaporation chamber; cold air is communicated with the cold storage chamber and the ice bar through an inner cold air pipe; multiple layers of partition boards are arranged inside the ice bar; a rotating shaft is arranged at the center of the double-sided rotary refrigerator; the rotating shaft is connected with a rotating motor; a rotating base is arranged at the bottom of the refrigerator; the cabinet of the refrigerator rotates by taking the rotating shaft as a center. The double-sided rotary refrigerator has the functions of the fridge and the ice bar at the same time, and integrates a storage space, heat insulation performance and a display effect; the cabinet can automatically rotate around the central shaft, and through key control and programmed automatic operation, positions of the fridge and the ice bar are exchanged, so that storage and fetching in a kitchen and a dining room can be facilitated, and a fresh visual sense is brought to users.

The invention discloses a multifunctional power-off acquisition protection device, which comprises a shell, a working copper bar conductor, a cut-off piston, an ignition trigger and a pair of first signal acquisition terminals, and is characterized in that the shell is internally provided with a cut-off working chamber; the working copper bar electric conductor is inserted into the shell in a penetrating manner, at least one cutting reed is arranged in the cutting working cavity, and the cutting reed is an alloy resistor part made of an alloy material; the cut-off piston is arranged in the cut-off working chamber in a manner of moving up and down and is positioned right above the cut-off reed; the ignition trigger is arranged on the shell and used for driving the cut-off piston to move so as to cut off the cut-off reed when the ignition trigger is triggered to be started. The pair of first signal acquisition terminals is electrically connected to the two ends of the working copper bar conductor respectively. The multifunctional power-off acquisition protection device can realize the functions of current monitoring, overload protection, loop breaking and temperature monitoring.

A load driving device and system, and a limiting point control method and device. The load driving device comprising: a voltage / current regulative main circuit placed under the control of an output current controller, for use in conducting a voltage conversion on an input voltage, and in supplying electric power to a subsequent load unit; a sampling unit connected to an output terminal of the main circuit, for use in sampling an output feature parameter of the main circuit; the output current controller, for use in controlling a limiting point of the main circuit, and on the basis of the adjustment direction of the limiting point and on changes of the output feature parameters of the main circuit before and after an adjustment, determining a steady working point for the main circuit, and controlling the main circuit to work at the steady working point. The load driving device and system enable an increase in driver reliability and a reduction in circuit complexity.

The invention provides a wall lamp, and belongs to the technical field of lamps. According to the wall lamp, a single light source is adopted, an upper panel and a lower panel of a lamp body transmit light, a light-emitting face of a lamp panel is installed on the side, away from an installation base, of the lamp body, a reflecting cover adopts three groups of paraboloid-shaped reflecting faces, and one group of paraboloid-shaped reflecting faces enable light emitted by the lamp panel to be emitted out from an upper light-transmitting plate and a lower light-transmitting plate respectively; a cavity is formed on the back surface of the group of paraboloid-shaped reflecting surfaces; and a power supply assembly is arranged in the cavity. According to wall lamp, the single light source and the two paraboloid-shaped connected reflecting surface are adopted, light of the lamp panel is fully emitted from the upper light-transmitting plate and the lower light-transmitting plate, and the single-light-source up-and-down light-emitting wall lamp which is low in cost, few in heating source, high in light utilization rate and further in irradiation is achieved; the light-emitting face of the lamp panel faces the mounting base and is installed at the end, away from the mounting base, of the lamp body in a hidden mode, and the light of the lamp panel faces the wall and is not dazzling. The power supply assembly is installed in the back cavity, facing the mounting base, of the reflection cover, the space is saved, and the size of the lamp can be made small.

The invention relates to a preparation method of a spraying composition of influenza vaccine. The composition contains influenza virus antigens and drug-acceptable carriers which are chosen from interferon, ion exchange resins, human serum albumin or phosphate buffer.

A high-frequency half-wave rectifier system of low-harmonicity and high-efficiency, which mainly comprises: a current output device having an output end and a first flow-return end respectively at both ends, a rectifying module, a resonant tuning unit, a first node, a voltage regulator module, at least one load element, a grounding portion, and at least one flow-return path. By means of the above structure, a simple circuit configuration and appropriate capacitance value setting are used to control the duty cycle of the rectifying module to approximately 74 nanoseconds and adjust the output power and improve the AC to DC conversion efficiency for the rectifying module under the low electromagnetic interference condition.

The invention relates to a power supply source control device for aircraft, which belongs to the field of aviation electrics, and includes a casing, a generator arranged in the casing, an excitation control module, an excitation storage battery, a current-limiting insurance 5A, and a main control device arranged outside the casing ;The main control device includes battery interface, ground power interface, relay J1~relay J3 and bus bar; the coils of relay J1 and relay J2 are connected in parallel between the battery interface and ground, and the normally open contact J1‑1 of relay J1 is connected to the bus The bus bar is connected to the coil of the relay J3 and one of the power terminals of the bus bar is connected to the excitation control module through the excitation control protection switch K1; the excitation control module is connected to the corresponding pin of the generator, the excitation battery and the working indicator light L It is connected in series with the current-limiting fuse 5A and then connected to the power supply terminal of the excitation control module; the positive pole of the power supply of the generator is connected to the normally open contact J3-1 of the relay J3 through the switch S1. The invention has the advantages of low cost, high reliability, good heat dissipation and safety and stability.

The invention discloses a photocuring 3D printer base heat dissipation structure. The structure comprises a supporting piece and a first cooling component, and the cooling component comprises a driving assembly, a plurality of first cooling fins and a plurality of second cooling fins; the driving assembly is used for driving the first cooling fins and the second cooling fins to move synchronously; the first cooling fins and the second cooling fins are arranged on the same side of the light-emitting source, the first cooling fins and the second cooling fins are arranged at intervals, and the first cooling fins are attached to the light-emitting source; when the temperature in the base is lower than or equal to the room temperature, a gap is formed between the second cooling fins and the light-emitting source; and when the temperature in the base is higher than the room temperature, the second cooling fins are attached to the light-emitting source. According to the photocuring 3D printer base heat dissipation structure, through the first cooling fins and the second cooling fins, the contact area of the light-emitting source and the cooling fins is increased, then the heat dissipation efficiency of the light-emitting source is improved, the time of the 3D printer in a high-temperature state is shortened, and then the service life of the 3D printer is prolonged.

The invention discloses glycopyrronium bromide injection and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps of: (1), adding 50-90% of injection water into a preparation tank, adding sodium chloride, adding a pH adjusting agent after dissolving to adjust the pH value to 1.0-4.0, and then, diluting to total weight by adding injection water to obtain solution A; (2), adding glycopyrronium bromide into the solution A at the constant temperature of 30-40 DEG C, stirring till dissolving completely, crudely filtering in a filtrate tank through a milliporous filtration membrane which is 0.45 mu m, and finally filtering through a milliporous filtration membrane which is 0.22 mu m to obtain an intermediate product; (3), filling the filtrate tank into a neutral boron-silicon container, sealing, and sterilizing through steam at 115-121 DEG C for 8-30 min to obtain the glycopyrronium bromide injection. The glycopyrronium bromide injection disclosed by the invention has the characteristics of being good in stability, high in safety and the like.

The invention discloses a cutting frequency conversion control device for a cantilever-type coal mine heading machine and a control method of the cutting frequency conversion control device. The device comprises a pre-charging and switching unit, an input reactor, a rectifier, an intermediate DC loop, an inverter, a controller and a sensor unit, wherein the output end of the pre-charging and switching unit is used for supplying power to a heading motor of the cantilever-type coal mine heading machine sequentially through the input reactor, the rectifier, the intermediate DC loop and the inverter, and the output end of the controller is connected with a controlled end of the inverter. The method comprises the following steps of: judging whether regenerative braking is required or not, generating a negative torque closed-loop control quantity by taking the voltage of the intermediate DC loop as a feedback quantity when the regenerative braking is required, and outputting the negative torque closed-loop control quantity to the inverter so as to control a motor to consume regenerative energy. The cutting frequency conversion control device and the control method thereof have the advantages that the regenerative energy can be consumed in no need of a chopper circuit, the material cost can be saved, the installation space is reduced, the cooling of an electrical cabinet of a frequency converter is improved, and convenient construction is achieved.