35results about How to "Solve serious fever problems" patented technology

The invention discloses a high-reliability constant voltage mode semiconductor laser driver with continuously adjustable output light power, and relates to a semiconductor laser driver. The driver solves the problems of serious amplifier heating and slow current limiting protection response in the high power of a conventional semiconductor laser. A voltage sampling circuit of the driver is used for acquiring the voltage of a laser diode. A current sampling circuit of the driver is used for acquiring the current of the laser diode. Constant current control circuit is used for controlling the intensity of the current flowing through the laser diode. The sampling signal output end of the voltage sampling circuit is connected with the sampling signal input end of a micro control unit (MCU). The sampling signal output end of the current sampling circuit is connected with the sampling signal input end of the constant current control circuit. The control signal input end of the constant current control circuit is connected with the constant current control signal output end of the MCU. A thermal resistor is used for acquiring the temperature of the laser diode. A thermoelectric cooler (TEC) is used for cooling the laser diode. The driver is suitable for use as a novel high-reliability constant voltage mode light source with the continuously adjustable output light power.

The invention discloses a hydraulic control valve unit for a rotating-vane type steering engine, belonging to the field of hydraulic control valve units. The hydraulic control valve unit comprises an electromagnetic reversing vale, a shuttle valve, a pilot-operated relief valve, a first cartridge valve, a second cartridge valve, a third cartridge valve, a fourth cartridge valve, a fifth cartridge valve, a sixth cartridge valve and a seventh cartridge valve; an oil inlet of the hydraulic control valve unit is communicated with a first oil inlet of the seventh cartridge valve and a first oil inlet of the electromagnetic reversing vale; a second oil inlet of the seventh cartridge valve is communicated with the oil outlet of the hydraulic control valve unit; an oil control port of the seventh cartridge valve is communicated with an oil inlet and an oil outlet of the pilot-operated relief valve; and the oil outlet of the pilot-operated relief valve is communicated with the oil outlet of the hydraulic control valve unit. The heating of a hydraulic system is reduced, thus the size of an oil tank of a hydraulic pump station is reduced, and the space in a ship is saved.

The invention provides a mobile power supply capable of controlling the magnitude of output current. The mobile power supply comprises a case, a battery pack and a charging circuit, wherein the battery pack and the charging circuit are arranged in the case; the charging circuit comprises a voltage conversion and current control unit, an MCU (micro control unit) and a signal switching module; the battery pack is connected with the voltage conversion and current control unit; the voltage conversion and current control unit is connected with the MCU; the signal switching module comprises a switching switch and a plurality of current limiting setting resistors; the switching switch is switched between a plurality of current limiting setting resistors; the MCU is connected with the switching switch; a power supply output interface and a control press key are arranged on the case; the voltage conversion and current control unit is connected with a power supply output interface; the control press key is in communication connection with the MCU. The mobile power supply has the advantages that the current output value is manually controlled through the use feeling of a user; the problem of serious heat generation of a charged electronic product is solved; the safety accidents due to heat generation are avoided.

The invention discloses a display device, a backlight module and a field emission light source device thereof. The field emission light source device comprises an anode formed on a substrate, the anode including an anode electrode layer provided on the substrate, and a luminescent material layer disposed on the anode electrode layer wherein the anode electrode layer comprises: a thermally conductive layer on the substrate and a transparent conductive film on the thermally conductive layer. The luminescent material layer is arranged on the transparent conductive film. The thermally conductive layer is made of metal materials and has a grid structure. The invention also provides a backlight module and a display device with the field emission light source device. According to the invention, the problem with severe heating of a field emission light source device can be resolved.

The invention discloses a novel structure motor driver. A capacitor module part comprises capacitors uniformly distributed on capacitor PCBs (printed circuit board) in an l shape; the capacitors are arranged in a way of being embedded in an aluminum case; a power module busbar copper sheet is welded and arranged on the power module PCBs; power tubes are uniformly arranged at the two sides of the power module PCBs in lines; an output copper post is also arranged on the power module PCB; board to board connection plug pins are arranged on board to board connection pin seats; the capacitor PCBs are connected with positive and negative electrode copper strips of a power module on the power module PCBs through screws. The novel structure motor driver also comprises a main control PCB arranged at the upper part of the power module PCBs; the main control PCB and the power module PCBs are communicated through a positive and negative electrode busbar copper strip; a control part circuit is provided with a branch circuit for collecting voltage drop in the work process of the power device and directly collecting output current of the power device by a current sensor. The novel structure motordriver has the advantages that the structure is optimized and more reasonable; the capacitance can achieve the capacitor compensation current features to the maximum degree; partial heating quantityof the power module is reduced; the heat radiation condition is improved.

The embodiment of the invention provides an integrated anti-reverse-connection and high-side switching circuit and a controller. The integrated anti-reverse-connection and high-side switching circuit comprises a high-side driving unit, a power supply unit, a reverse-connection protection unit, a single-chip microcomputer unit and an enabling control unit. The high-side driving unit is electrically connected with the high-side load and is used for supplying power to the high-side load; the power supply unit is electrically connected with the high-side driving unit and supplies power to the high-side driving unit; the reverse-connection protection unit is electrically connected with the power supply unit to prevent the controller from being damaged by reverse connection of the power supply unit; the single-chip microcomputer unit is electrically connected with the enabling control unit and is used for sending a high-side enabling signal to the enabling control unit; and the enabling control unit is electrically connected with the high-side driving unit and is used for processing the high-side enabling signal and then sending the processed high-side enabling signal to the high-side driving unit. The integrated circuit has two functions of reverse connection prevention and high-side driving, the production cost is reduced, the occupied space of the circuit is reduced, and the stability of the circuit is improved.

The invention relates to the technical field of control, in particular to a flash lamp control circuit and a mobile terminal. The flash lamp control circuit comprises a flash lamp and a current amplification structure; The current amplification structure comprises a first transistor and a second transistor. The current output terminal of the first transistor is connected with the current input terminal of the second transistor. Current amplified by the current amplification structure flows into the flash lamp. The invention solves the problem of serious heat generation of the transistor and reduces the heat generation in the flash lamp control circuit.

Disclosed in the embodiment of the invention is a linear charging circuit comprising a charger, a control circuit, a power management chip and a battery. A first output voltage of the charger is connected with an output terminal of the charger by a control resistor; the output terminal of the charger is connected with a first input terminal of the control circuit; a first output terminal of the control circuit is connected with an input terminal of the battery; and a second input terminal of the control circuit is connected with an output terminal of the power management chip. The output terminal of the charger is used for outputting a second output voltage to the first input terminal of the control circuit; the control circuit adjusts the voltage outputted by the first output terminal of the control circuit according to the voltage inputted by the first input terminal of the control circuit and the voltage inputted by the second input terminal of the control circuit, and then the voltage at the input terminal of the battery is adjusted. The voltage inputted into the second input terminal of the control circuit is provided by the output terminal of the power management chip. According to the embodiment of the invention, the charging efficiency of the linear charging can be improved and the heating of terminal equipment can be prevented.

The invention discloses a headlight lens module. The headlight lens module comprises a light source, a reflector, a light changing device, a sleeve, a convex lens, a supporting mechanism, a radiator and an air convection driving device. The light source comprises a plurality of LED lamp beads, and is arranged on the supporting mechanism. The reflector is arranged on the supporting mechanism and located above the light source. The sleeve is connected with the supporting mechanism, the convex lens is arranged at one end, opposite to the supporting mechanism, of the sleeve, and the light changingdevice connected with the supporting mechanism is used for switching between a low beam mode and a high beam mode. The radiator is connected with the supporting mechanism and located below the lightsource, and the air convection driving device is connected with the supporting mechanism and located below the radiator. The radiator is made of pure aluminum, and the supporting mechanism is made ofa rigid material. The headlight lens module has the advantages that through the radiator made of the pure aluminum, the serious heating problem in the illumination process of the LED lamp beads is solved, and the service life of the lamp beads is prolonged; through the supporting mechanism made of the rigid material, the overall strength is ensured.

The embodiment of the invention discloses a charging control method and device and a mobile terminal. The charging control method comprises the steps of detecting a charging mode; judging whether an application runs in the system or not when it is detected that the charging mode is wireless charging; determining a wireless charging current value according to the judgment result; and wirelessly charging a battery of the mobile terminal according to the determined wireless charging current value.

The invention relates to a shielding switching device for a large cable, which comprises a horizontal shielding shell and a vertical shielding shell, one end of the horizontal shielding shell is connected with the top end of the vertical shielding shell to form an L shape, and the horizontal shielding shell and the vertical shielding shell are communicated with each other at the connecting position; the horizontal insulator is arranged in the horizontal shielding shell in a sleeving manner, and a plurality of horizontal grooves are formed in the horizontal insulator in parallel; the vertical insulator is sleeved in the vertical insulation shell, a plurality of vertical grooves are formed in the vertical insulator side by side, each horizontal groove corresponds to one vertical groove, the corresponding horizontal groove and vertical groove are connected at the end part, and a cable lapping port is formed at the joint. According to the shielding switching device for the large cable, large-angle turning of the large-diameter cable in a limited space can be achieved, shielding can be effectively carried out, and crosstalk coupling of electromagnetic signals is avoided.

The invention discloses a variable magnetic flux hybrid excitation permanent magnet vernier motor of an electric automobile, belongs to the technical field of automobile electric appliances and comprises a stator core, an auxiliary winding, an armature winding, a shell, first permanent magnets, a shaft, second permanent magnets and a rotor, wherein the stator core is provided with 3X uniformly distributed main stator teeth and 3X auxiliary stator teeth, the auxiliary stator teeth are connected to the middle of the main stator teeth through a tangential connecting yoke to form h-shaped stator teeth with the main stator teeth, each stator notch is fixedly provided with a tangentially magnetized first permanent magnet, the middle of the outer circumference of the first permanent magnet is connected with the auxiliary stator teeth, and 2X pairs of uniformly distributed second permanent magnets are attached to the circumferential surface of the rotor; and each main stator tooth is wound with an armature winding, and each auxiliary stator tooth is wound with an auxiliary winding. The variable magnetic flux hybrid excitation permanent magnet vernier motor has the advantages that the auxiliary winding can realize controllable magnetic flux, the speed regulation range of the motor is increased to adapt to different operation conditions respectively, and the problem of serious heating ofthe stator core in the operation process of the motor can be effectively solved.

The invention provides a pre-modulation broadband power output device for an intermediate-frequency therapeutic instrument and a method thereof. The output device comprises a therapeutic input unit, alow-frequency signal unit, a pre-modulation power output unit, an intermediate-frequency signal unit and a broadband inversion unit. The low-frequency signal unit is connected with one end of the pre-modulation power output unit, the other end of the pre-modulation power output unit and the intermediate-frequency signal unit are connected with one end of the broadband inversion unit, and the other end of the broadband inversion unit is connected with an external treatment electrode slice. The method comprises the following steps: S1, inputting a treatment requirement; S2, generating a low-frequency signal, a direct-current power signal and an intermediate-frequency signal; S3, pre-modulating the direct-current power signal by using the low-frequency signal; and S4, modulating the pre-modulated direct-current power signal through the intermediate-frequency signal to obtain a modulated intermediate-frequency power signal. According to the output device and method, output signals with the same effect and better high-frequency characteristics can be obtained, the structure is simple, and the working efficiency is high.

The invention provides a current-sharing bypass circuit of a power unit of a high-voltage inverter. The current-sharing bypass circuit comprises a single-phase full-wave diode-bridge rectifier arranged beside an H-bridge inverter, a first thyristor, a second precharging resistor, a first buffer circuit, a second thyristor, a second precharging resistor and a second buffer circuit. The cathodes of two diodes, connected with the direct-current positive output end of a bridge rectifier, in the single-phase full-wave diode-bridge rectifier are connected with the anode of the first thyristor and the anode of the second thyristor respectively, and the anodes of two diodes, connected with the direct-current negative output end of the bridge rectifier, in the single-phase full-wave diode-bridge rectifier are connected with the cathode of the first thyristor and the cathode of the second thyristor respectively. The current-sharing bypass circuit can effectively solve the problem of serious heating of a single thyristor.