40results about How to "Self-starting" patented technology

The invention relates to a permanent magnet synchronous motor of sinusoidal pole width modulation, belonging to the technical field of motors. The motor comprises a rotation shaft (1), a bearing (2) which is matched with the rotation shaft (1), an end cover (3), a stator core (5) and a rotor core (6) which is matched with the rotation shaft (1); the motor is characterized in that n distribution-typed permanent magnetic pole (7), with unequal widths and intermittent spacings, are fixed at the circumference of the rotor core (6); the central line of the distribution-typed permanent magnet of No. i (i is equal to 1, 2, 3,..., n) and the central line of a magnetic pole have an electric angle of Theta which is equal to (2i-1)*pi/(2n); the width arc angle Alpha of the distribution-typed magnetic pole of No. i is equal to cos((i-1)*pi/n-cos(i*pi/n)); a squirrel cage rotor (8) is arranged outside the rotor core (6) and carries out circumference separation and circumferential positioning on the distribution-typed permanent magnetic pole (7). The invention has the advantages of high work efficiency, stable and reliable operation and obvious energy-saving characteristic.

The invention discloses a permanent magnet synchronous motor (PMSM) with two stators, a composite rotor structure and radial and axial mixed magnetic paths and a method thereof. The PMSM comprises a radial stator, an axial stator and a rotor, wherein the rotor is inserted in the radial stator and coaxially arranged with the radial stator, the axial stator is arranged on one end or two ends of the rotor, the axial stator and the rotor are concentric, a radial winding is arranged in the stator groove of the radial stator, an axial winding is arranged in the stator groove of the axial stator, a rotor groove is arranged in the rotor, a permanent magnet is placed in the rotor groove, the permanent magnet enables the rotor to generate a radial magnetic pole and an axial magnetic pole, the radial magnetic pole faces the radial stator of the motor, the axial magnetic pole faces the axial stator of the motor, and the motor generates radial and axial torques to form mixed magnetic paths. The radial magnetic flux and axial magnetic flux generated by the permanent magnet of the motor can be utilized, end portion magnetic leakage can be eliminated, the utilization rate of motor material is improved, and the weight of the motor is reduced.

The invention provides a single-phase brushless direct current motor and electrical equipment. The single-phase brushless direct current motor comprises a stator and a rotor, wherein the stator comprises a stator iron core, the stator iron core comprises a stator magnet yoke and an even number of stator teeth connected with the stator magnet yoke, any stator tooth comprises a tooth body extending in the radial direction and a tooth crown connected with the tail end of the tooth body, the tooth crown comprises two pole shoes, and the two pole shoes extend towards the two sides of the corresponding tooth body in the rotating direction of the rotor; and the number of poles of the rotor is three times of the number of stator teeth. Through the above design, the number of pole pairs of the stator and the rotor is unequal, and the rotor magnetic field acts with the stator magnetic field after modulation to generate more working harmonics, thereby realizing the torque amplification of a vernier permanent magnet motor, increasing the output torque of the motor, and improving the operation efficiency of the motor. Meanwhile, the harmonic content in the counter electromotive force of the motor is lower, the waveform is more sinusoidal, the motor runs more stably, the torque ripple is smaller, and the vibration noise performance of the motor is improved.

The invention discloses a secure power saving system and a secure power saving method for a mobile terminal. The secure power saving system comprises a secure power saving key, an application whitelisting unit, an application running state control unit, an application cache clearing unit and an extreme engine module, wherein after receiving a trigger from a user, the secure power saving key sends key information to the extreme engine module; the extreme engine module judges whether the received key information is valid information, and then enters the secure power saving system if the received key information is the valid key information and the running state of the mobile terminal is in a common mode; and if the mobile terminal is in a secure power saving state, the extreme engine module quits the secure power saving system and enables the mobile terminal to return to the common mode. Due to the system and the method, the user can trigger one key to fulfill the aim of securely saving the power instead of closing power-consuming applications and services, so that the operation complexity and the requirement on professional knowledge are greatly reduced, and the good feeling for use experience of the user is enhanced.

The invention relates to a bullet cabinet, in particular to an intelligent bullet cabinet with an anti-theft device. The intelligent bullet cabinet with the anti-theft device can give an alarm in time. An intelligent bullet cabinet with an anti-theft device comprises an outer frame body, an inner frame body, a display screen, fixing rods, a first cover plate, a coded lock, a second cover plate and the like, the inner frame body is arranged in the outer frame body, the display screen is arranged on the upper portion of the left front side of the inner frame body, the fixing rods are arranged on the left side and the right side of the front side of the inner frame body, and the first cover plate is rotationally arranged on the fixing rod on the left side; a coded lock is arranged on the upper portion of the right front side of the first cover plate and electrically connected with the display screen, and a second cover plate is rotationally arranged on the fixing rod on the right side. The first electric conductor moves backwards to be in contact with the second electric conductor for electric conduction, then the alarm is started through the electric wire on the front side, the alarm makes a sound to warn criminals, and meanwhile the alarm controls electronic alarm equipment in an external monitoring room to give an alarm through wireless signals.

The invention discloses monitoring security and protection equipment with a mirror fog prevention function. The monitoring security and protection equipment structurally comprises a mounting buckle plate, a protective cover, a mirror fog prevention device and a camera. Beneficial effects are as follows: a ventilation ring and a ventilation hole are matched with each other, invaded mosquitoes and dust around the camera can be automatically removed in an air blowing manner at any time; therefore, the view of the camera can be kept clear all the time; therefore, the situation that the camera doesnot monitor in place due to external factors is avoided; the self-inductance structure and the protection mechanism are matched with each other, so that the monitoring equipment can be automaticallystarted under the action of external natural factors (wind and rain), the supporting plate surrounding the upper part of the camera is in an unfolded state, and the camera is prevented from being eroded by rainwater or wind power by utilizing a fan-shaped unfolding structure of the supporting plate.

The invention discloses an active and passive hybrid mode-locked optical fiber laser with a temperature compensation function, and belongs to the technical field of optical communication devices. The main structure comprises an active mode-locked optical fiber layer resonant cavity, a temperature compensation system, a passive mode-locked optical fiber laser system and a pulse optimizing system, wherein the active mode-locked optical fiber layer resonant cavity is formed by a pumping light source (1), a wavelength-division multiplexer (2), a first optical coupler (3), an adjustable optical fiber filter (4); the temperature compensation system is formed by absolute ethyl alcohol filled photonic crystal fiber (27), a third optical probe (28) and a second amplifying circuit (29); the passive mode-locked optical fiber laser system is formed by dispersion compensation optical fiber (22) and a black phosphorus saturable absorber (21); the pulse optimizing system is formed by two feedback control rings. Active and passive hybrid mode locking is adopted, a feedback technology is used for conducting automatic feedback control over active and passive hybrid mode-locked optical fiber laser systems, the optical fiber laser has the temperature compensation function, and optical pulses in the system can be optimized better and stable.

The invention discloses a hypersonic-speed and large-internal-contraction-ratio air inlet channel with a stepless adjustable deflation valve. The hypersonic-speed and large-internal-contraction-ratio air inlet channel with the stepless adjustable deflation valve comprises an air inlet channel front body, a deflation seam cover plate, a side wall, a lip cover, a deflation cavity, valve blades, a partition plate, a rotating shaft, a diffusion section and driving mechanisms. According to the actual working condition of the air inlet channel, the valve blades are rotated through the driving mechanism, the minimum section of a deflation flow path is changed, and stepless dynamic adjustment of the deflation flow of the air inlet channel can be achieved, so that the starting performance of the air inlet channel is improved, the pneumatic performance of the air inlet channel is improved, and the deflation resistance of an aircraft is reduced. According to the hypersonic-speed and large-internal-contraction-ratio air inlet channel with the stepless adjustable deflation valve provided by the invention, the valve blades on each of the two sides of the air inlet channel share one set of driving mechanism, and the driving mechanisms on the two sides are consistent in control rule, so that motor control is convenient to use; and the whole device is simple in structure, and the deflation flow can be adjusted without adopting a complex air inlet channel body adjusting device, so that the contradiction between the aerodynamic performance and the starting performance of the hypersonic-speed air inlet channel is solved.

The invention discloses a self-starting three-phase synchronous reluctance motor, and relates to the field of reluctance motors. The motor comprises a rotor structure, which comprises a rotating shaft, wherein a rotor iron core is wound on the periphery of the middle of the rotating shaft, a stator coil is wound on the periphery of the rotor iron core, a base is arranged on the periphery of the stator coil, a front end cover is fittingly mounted at the front end of the base, a rear end cover is fittingly mounted at the rear end of the base, the front end cover and the rear end cover are assembled on the rotating shaft through bearings, the front end cover and the rear end cover are connected with the base through bolts, the rotor structure further comprises a rotor fan and cast aluminum guide bars, the rotor fan is installed on the rotating shaft and located on the rear side of the rotor iron core, pressing plates are fixed to the front end and the rear end of the rotor iron core, rectangular magnetic barriers and tooth grooves are formed in magnetic shoe part of the rotor iron core, the cast aluminum guide bars are arranged in the rectangular magnetic barriers and the tooth grooves, and balance blocks are further fixedly arranged at the two ends of the rotor iron core. According to the invention, the motor has self-starting capability and can reach a stable state under the condition of power supply of a three-phase alternating-current sinusoidal power supply.

The invention discloses a road surface humidity adjustment system including a road pier and a base. A water storage space is opened in the road pier, a solar cell panel is fixedly connected with the top of the road pier, a water inlet pipeline penetrating through the water storage space is arranged in the solar cell plate, the water inlet pipe and an outside connecting position are connected witha filter screen in a sealing mode, a circulation structure absorbing dew is connected with the side wall of the road pier, the circulation structure includes a first air inlet formed in the side wallof the road pier, a sliding chamber opened in the inner wall of the road pier communicates with the first air inlet, a sliding plate is arranged in the sliding chamber in a sealing and sliding mode, and a plurality of springs are fixedly connected with the sliding plate. The system has the advantages that lateral wind driven by traffic stream achieves the circulation process of air in a hydraulicchamber, so that wetting and cooling air is cooled after heated in primary circulation, the liquefaction amount of the air can be increased, water in the air can be achieved, and is used for humidification and dust removal work of a road during the day, and the environment-friendly and energy-saving effect can be achieved.

The invention belongs to micro flow pump technology field in precision machinery, which refers to micro film pump, which is made up of an upper and a subjacent bracket, a piece of cover, a film and a double-swage beam; the two brackets are integrated together, the cover piece, film and cushion are pressed and overlapped between the two brackets; there has a ventilation hole in the middle part of the upper bracket to make the piece extrude out, the cover piece has two ventilation holes acted on liquid inlet and outlet; the middle part of the film forms liquid storing, and flow area, the area includes liquid inlet, the first micro valve, pump cavity, the second micro valve whose direction is the same to the first micro valve direction, liquid outlet, the bottom of the area is pump film, the cover combines with the film and forms the pump. The structure of the invention is simple, it is reliable.

The invention discloses a secondary air pump driven by a brushless motor. The secondary air pump comprises a pump shell, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are fixed on the upper end part and the lower end part of the pump shell respectively, thus the pump shell forms a closed space, the pump shell is sequentially divided into an impeller chamber, a brushless motor bearing chamber and a controller mounting chamber from top to bottom, an isolation subplate is arranged between the brushless motor bearing chamber and the controller mountingchamber, an air inlet pipe is arranged on the front end cover, the front end cover is provided with a raised annular air flow channel, the annular air flow channel is connected with the air inlet pipeline, the impeller chamber is positioned directly below the annular air flow channel, an impeller body is arranged in the impeller chamber, and a brushless motor structure is arranged in a brushless motor bearing chamber. The air pump has compact structure and reasonable design, can realize the effect of bearing the brushless motor, realizes the effects of low noise, high power density and elimination of friction resistance of an electric brush, has good sealing effect, is convenient to assemble and has good application prospect.

The invention provides a rotor structure, a motor and a rotor processing method. The rotor structure is provided with at least one pair of rotor poles, wherein each rotor pole is provided with a plurality of magnetic barrier layers. The rotor structure further comprises magnetic barrier layers, wherein each magnetic barrier layer comprises a slit groove, and two ends of the slit groove of at least part of the magnetic barrier layers are provided with filling grooves; and the slit grooves are symmetrically arranged relative to the quadrature axis of the rotor structure, and the filling grooves of the magnetic barrier layers are arranged along the direction of the direct axis of the rotor structure. The rotor structure provided by the invention solves the problem of poor starting capability of a self-starting synchronous reluctance motor in the prior art.

The invention relates to a permanent magnetic synchronous motor of single magnetic steel, belonging to the technical field of motors. The motor comprises a rotation shaft (1), a bearing (2) which is matched with the rotation shaft (1), an end cover (3), a stator core (5) and a rotor core (6) which is matched with the rotation shaft (1); the motor is characterized in that the rotor core (6) is provided with a trough space (7) which is internally provided with permanent magnetic steels with the same polarity; the quantity of the permanent magnetic steels are identical to the pole pair number of the motor; the spatial angle between the trough spaces (7) is 360/p degree; wherein, p is the pole pair number of the motor; the rotor core (6) is provided with a rotor trough (13) which is internally cast by aluminium and/or copper which are connected with an end ring (9). The permanent magnetic synchronous motor has high mechanical strength, stable and reliable running operation and obvious energy-saving advantage.

The invention discloses a pulse separation laser oscillator. According to the pulse separation laser oscillator provided by the invention, the left end of an optical path adopts a bi-pass amplification structure formed by a combination of an erbium-ytterbium co-doped optical fiber and a Faraday rotator mirror, and the right end of the optical path adopts an SESAM optical path with a full polarization maintaining structure, so the birefringence effect of optical fiber transmission and amplification is counteracted; and a spatial light path part in the oscillator adopts a full-curing structure,so the stability and the efficiency of light transmission are ensured. According to the invention, pulsed light is effectively amplified, the requirement of a high-power laser for the seed light is met, the seed light with various repetition frequencies can be generated by changing the length of a resonant cavity of the pulsed light, and the pulsed light amplifying device has a great application value in laser building and repetition frequency locking.

The invention discloses a power generation system and a power generation method for a multi-source system railway freight vehicle. The power generation system comprises a first power generation device which is an axle end power generator mounted at the end part of an axle, and further comprises more than one auxiliary power generation device mounted on a vehicle body and used for generating power; and a power supply conversion and management device used for converting and managing the electric power generated by the first power generation device and the auxiliary power generation device and completing power supply output to an application object. The power generation method is a method based on the power generation system. The system has the advantages of simple structure, easy realization, continuous and stable output, multi-mode compatibility and the like.