33results about How to "Reduce the difficulty of heat dissipation" patented technology

The invention discloses a laminated type high-power magneto-rheological fluid clutch. The laminated type high-power magneto-rheological fluid clutch comprises a primary transmission shaft (4), a left rotary magnetic conductance side board (6), a magnet exciting coil (8), a fixing magnetic conductance outer shell (9), a right rotary magnetic conductance side board (14), a secondary transmission shaft (17), a magnetic conductance board (18), a plurality of layer-adjustable inner layer primary friction plate groups (3), outer layer primary friction plate groups (7), outer layer secondary friction plate groups (12) and inner layer secondary friction plate groups (15), inner layer small magnetic isolation ring groups (2), outer layer small magnetic isolation ring groups (5), an inner layer large magnetic isolation ring (13) and an outer layer large magnetic isolation ring (20). Compared with the prior art, the laminated type high-power magneto-rheological fluid clutch adopts a plurality of friction plate groups for transmission, effectively disperses a heat source, reduces the heat dissipation difficulty, utilizes cooling water for cooling, and obviously improves the transmission power and the heat dissipation effect. When the transmitted power is insufficient, a mode of increasing the layers of the friction plate groups can be adopted, and controllable operation of the transmitted power is easy to achieve.

The invention discloses a rotor structure for a high speed permanent magnet synchronous machine. The rotor structure comprises an electric machine rotor and a rotating shaft, wherein a protection layer is arranged at the outermost layer of the electric machine rotor; the rotating shaft is arranged at the center of the electric machine rotor; permanent magnets are arranged between the rotating shaft and the protection layer; the permanent magnets are divided into an inner layer and an outer layer; the permanent magnet at the outer layer is a ferrite permanent magnet; the permanent magnet at the inner layer is a rare earth permanent magnet; the number of poles of the ferrite permanent magnet is p1, the number of poles of the rare earth permanent magnet is p2, and P1 is equal to P2; and the central lines of the same poles of the two layers of permanent magnets are coincident. According to the rotor structure, the advantages of residual magnetism and low conductivity of the ferrite permanent magnet and the advantage of high residual magnetism of the rare earth permanent magnet are fully combined, the ferrite permanent magnet and the rare earth permanent magnet are matched according to a certain thickness ratio, so that the vortex loss of the rotor is reduced and the heat dissipation difficulty of the electric machine is reduced on the premise of guaranteeing the needed magnetic field generation ability, and furthermore, through the reasonable design, a problem of large volume of the electric machine, which is caused by entirely using the ferrite permanent magnet material, or large vortex loss of the electric machine, which is caused by entirely using the rare earth permanent magnet material, is solved.

The invention discloses a novel high-temperature-resistant fire-fighting smoke-discharge fan. The novel high-temperature-resistant fire-fighting smoke-discharge fan comprises an outer barrel, an innerbarrel which is coaxially arranged in the outer barrel and is sealed, a plurality of guide supporting parts for fixing the inner barrel, a through shaft motor which is coaxially mounted in the innerbarrel, smoke discharge fans which are connected with a rotary shaft of the through shaft motor, an air outlet channel and an air inlet channel for enabling the inner space of the inner barrel to communicate with the outer space of the outer barrel, an air exhaust guide ring which is arranged at the front end of the inner wall of the inner barrel and is tapered, a reversing transmission mechanismwhich is connected with the rear end of the rotary shaft, and an air-cooling mechanism which is driven by the reversing transmission mechanism; an air inlet of the air-cooling mechanism communicates with the air inlet channel; and an air outlet of the air-cooling mechanism faces towards the front end of the inner barrel. Through the sealed type fan of the inner barrel, high-temperature smoke is prevented from invading to increase the temperature of a motor operation environment; meanwhile, a ventilating channel which communicates with outside fresh air and the air-cooling mechanism which is synchronously driven by a fan motor are arranged, so that independent circulation of heat dissipation inside the inner barrel is realized, and an air-cooling way replaces a conventional water-cooling way, and therefore, operation stability of the motor is improved from multiple aspects.

The invention relates to the technical field of ultraviolet light application, in particular to an ultraviolet light source assembly, an ultraviolet optical system and an ultraviolet printing device. The ultraviolet light source assembly comprises a plurality of light sources for emitting ultraviolet light and further comprises a light collecting device. The light collecting device is matched with the light sources, so that all or part of the light emitted by the light sources enters the light collecting device, the light collecting device converges the light entering the light collecting device to a plane, and a continuous strip-shaped irradiation area is formed in the plane. The light collecting device is adopted for collecting and converging the light emitted by the light sources, and the continuous strip-shaped irradiation area is formed on the plane. Compared with a traditional ultraviolet light source assembly, identical irradiation intensity is achieved; and by means of the structure, the number of the needed light sources is far smaller than that of light sources needed by adopting a traditional structure, and therefore the structure of equipment is simplified, heat radiation difficulty is reduced, and then the reliability of the equipment is improved.

The invention is suitable for the technical field of permanent magnet synchronous motors, and provides a motor driving method and device, and the method comprises the steps: generating a first drivingpulse signal and a second driving pulse signal according to a conduction sector signal; sequentially acting a first driving pulse signal on the three switching elements in the upper bridge arm of theinverter according to the conduction sector signal, and sequentially acting a second driving pulse signal on the three switching elements in the lower bridge arm of the inverter according to the conduction sector signal. The period of the conduction sector signal is three times of the period of the carrier signal; and the action time of the first driving pulse signal on each switching element inthe upper bridge arm of the inverter and the action time of the second driving pulse signal on each switching element in the lower bridge arm of the inverter are the same as the period of the carriersignal. According to the driving method provided by the invention, each switching element of the inverter is switched on and off only once in each electrical period, so that the switching loss is reduced, the heat productivity and the heat dissipation difficulty of equipment are reduced, and the stability of the equipment is improved.

The invention provides an LED lamp strip whose a plurality of LED tube cores are directly mounted on a circuit substrate. The encapsulating structure comprises a circuit board substrate, a transparent bowl cup strip, the plurality of LED tube cores, fluorescent colloid coated on the tube cores and a transparent external encapsulating material, wherein the transparent bowl cup strip is combined with the circuit board substrate to from a lamp strip foundation support provided with a plurality of mounting depressions; one LED tube core is encapsulated in each mounting depression of the lamp strip foundation support; LED tube cores are fixedly bound on a manufactured circuit bonding pad of the circuit substrate via linkage and weld lines; fluorescent colloid are coated in the mounting depressions and covered with the bond LED tube cores; the bowl cup strip and the tube cores are encapsulated by the transparent external encapsulating material, thus forming an outer covering layer to protect the tube cores and the fluorescent colloid; and the outer covering layer is combined with the lamp strip to form a whole LED lighting strip.

The invention discloses a split type superhigh-expansion-ratio engine and an adjustment and control method and belongs to the field of engines. The split type superhigh-expansion-ratio engine comprises a gas compression device, an expansion acting device and a high-pressure pipe. A high-pressure gas tank is arranged between the gas compression device and the expansion acting device and is in gas circuit connection with the gas compression device and the expansion acting device through the high-pressure pipe. The air cylinder volume of the expansion acting device is greater than the air inlet natural volume. The split type engine is different from a common Otto-cycle internal combustion engine in that the gas compression stroke is moved into the gas compression device out of an acting cylinder and the engine is provided with the high-pressure gas tank for achieving buffering, pressure stabilization and temporary storage of compressed gas. By means of a certain technical scheme and the adjustment and control method, the engine can achieve the Atkinson cycle easily at the low cost in all working conditions; and in addition, the expansion ratio can be far greater than the compression ratio under the working condition of small acceleration, thus, oil consumption is remarkably lowered, and the effect is particularly obvious under the working condition of the small acceleration.

The invention discloses a temperature control device and method of a power device and electrical equipment, and the device comprises a semiconductor thermopile unit which detects the temperature of the power device, and obtains the current temperature of the power device, an acquisition unit used for detecting the current of the power device to obtain the current of the power device, and detectingthe voltage of the power device to obtain the current voltage of the power device, a control unit used for generating a first control signal capable of controlling the refrigerating capacity of a semiconductor thermopile unit according to the current temperature and the current current and the current voltage in two adjacent periods, and the semiconductor thermopile unit used for adjusting the refrigerating capacity of the semiconductor thermopile unit under the control of the first control signal so as to control the current temperature of the power device. According to the scheme, the heatdissipation difficulty of the power device in the electric controller of the electrical equipment can be reduced, and the heat dissipation performance is improved.

A ceramic steam cavity radiator comprises two substrates and side walls, one of the two substrates serves as the top wall of a shell, and the other substrate serves as the bottom wall of the shell. The two substrates and the side walls are integrally welded to form a shell structure comprising a closed cavity, and the shell is filled with a liquid working medium; the substrate is prepared from a ceramic material; and the side wall is made of metal copper. The ceramic steam cavity radiator can meet the technological requirements of the semiconductor production process, and is wider in application range in the aspect of device heat dissipation; the steam cavity radiator can be directly welded with the component, so that the hot spot heat of the component can be quickly diffused; the ceramicsteam cavity replaces a traditional pcb layer, the external heat transfer path of the component is shortened, and the heat dissipation capacity is more outstanding. The surface of the ceramic steam cavity radiator can be patterned, integrated integration of heat dissipation and component functions is achieved, the heat dissipation capacity of components can be greatly improved, and the overall packaging size can be greatly reduced. And meanwhile, a feasible heat dissipation solution is provided for new fields such as manufacturing of three-dimensional stacked chips.

A wireless communication device comprises a digital circuit board, a radio frequency circuit board and an antenna circuit board which are arranged in a stack mode, and the radio frequency circuit board is electrically connected with the digital circuit board and the antenna circuit board. The wireless communication device achieves structure modularization and integration design through stacked architecture so as to reduce the device size.

A processing device comprises a plurality of battery transport channels, a plurality of high heat generating light sources, and a plurality of low heating light sources. The battery transport channels are arranged adjacent to each other, wherein each battery transport channel comprises a transport device and the transport devices are configured to transport a plurality of semiconductor solar cells. The high heat source and the low heat source are arranged in a staggered manner along the transport direction of the transport device to the upper side of the battery transport channel for conducting heat treatment of the semiconductor solar cell. The light emitted by the high-heating light source and the low-emission light source contains visible light and infrared light, and the sum of the visible light accounts for 50 to 90% of the sum of the infrared light and the visible light. By arranging the high-heating light source and the low-emission light source in a staggered manner, it is possible to effectively reduce the temperature in the chamber of the processing apparatus while providing sufficient illuminance of the semiconductor solar cell, the difficulty of radiating the chamber of the processing apparatus can be drastically reduced, and the uniformity of the chamber temperature can be improved.

The invention relates to an AC-DC-AC power unit and the components thereof. And it comprises rectifier bridge, inverter bridge and capacitor group, where the rectifier bridge is used to convert input AC current into ripple DC current, the capacitor group is used to filter the ripple DC curren into stable DC current and the inverter bridge is used to invert the stable DC current into AC current with the required frequency and amplitude. And its sturcutre comprises at least two current transformer modules, their positive and negative ends are interconnected in parallel through positive and negative DC buses, respectively, each current transformer module comprises an inverter bridge arm and an independent radiator group. And it implements disperse radiation and reduces stray inductance, easy to make and reducing maintaining, changing and transporting difficulities.