15results about How to "Improve starting performance" patented technology

The invention relates to the field of induction motors, and provides a squirrel-cage adjustable magnetic ring induction motor, which comprises a stator, a squirrel-cage adjustable magnetic ring and a double-squirrel-cage rotor, the stator is provided with a stator slot and an armature winding and is used for cooperating with a rotating magnetic field to generate electromagnetic torque; the mouse cage magnetism adjusting ring comprises a plurality of single mouse cage rings and a magnetism adjusting ring iron core; the magnetic field adjusting ring iron core is provided with a magnetic field adjusting ring iron core groove, and the mouse cage magnetic field adjusting ring is embedded in the magnetic field adjusting ring iron core through the magnetic field adjusting ring iron core groove and used for inducing current and converting the number of pole pairs of a magnetic field through magnetic field modulation. The double-squirrel-cage rotor comprises an inner squirrel cage and an outer squirrel cage, the inner squirrel cage is arranged on the innermost layer of the motor and is composed of an inner-layer rotor iron core and squirrel cage strips, and the outer squirrel cage is arranged between the squirrel cage magnetic adjusting ring and the inner squirrel cage, is composed of an outer-layer rotor iron core and squirrel cage strips and is used for carrying out back electromotive force and current induction on the modulated magnetic field; therefore, electromechanical energy conversion is completed. According to the invention, through the squirrel-cage adjustable magnetic ring and the double-squirrel-cage rotor structure, larger output torque and power factor are provided.

The convenient-to-adjust double-motor starting device comprises a cross beam plate which is arranged on a public engine base and located on the right side of a flywheel at the output end of a diesel engine, two supports are installed on the cross beam plate in a position-adjustable mode, a pneumatic motor is installed on the supports in a height-adjustable mode, and a motor gear is fixed to the output end of the pneumatic motor. The motor gear is meshed with a flywheel at the output end of the diesel engine, and simultaneous starting and stopping of the two pneumatic motors are controlled through an electromagnetic valve arranged on a main air path. The pneumatic motors supported by the support in a height-adjustable mode are simultaneously arranged on the two sides of the output end of the diesel engine, the starting capacity and efficiency of the diesel engine are greatly improved, the starting time is shortened, and smooth and stable starting of the diesel engine is guaranteed. On the premise that the height of the pneumatic motor is adjustable, the support is fixed on the position-adjustable cross beam plate in a position-adjustable manner, so that the position of the pneumatic motor can be adjusted in three directions when the pneumatic motor is mounted and fastened, the assembly backlash is quickly ensured, the meshing consistency of a double-motor gear and a flywheel is ensured, and the backlash adjustment requirement is met.

The present invention provides a two-pole asynchronous start synchronous reluctance motor rotor, a two-pole motor and a compressor. The two-pole asynchronous start synchronous reluctance motor rotor includes a rotor core, the rotor core includes a first magnetic barrier structure, including multiple groups of first magnetic barrier parts and multiple supplementary slots, the extension direction of the supplementary slots is parallel to the q-axis, the multiple groups of first magnetic barrier parts are one or more of straight slots or second arc slots or special-shaped slots, and there is a distance D6 between two supplementary slots close to the q-axis. The rotor core has a central through hole for the shaft to pass through, and along the d-axis direction, the hole wall of the central through hole and its two adjacent arc slot segments have a distance D8 and a distance D9 respectively, satisfying D8+D9≥D6. The present invention effectively solves the problem of low working efficiency of the asynchronous start synchronous reluctance motor rotor of the motor in the prior art by optimizing the first magnetic barrier structure.

The invention relates to the technical field of hydraulic couplers, in particular to an efficient multi-stage hydraulic coupler. The structure of the disc and the cavity groove is adopted, so that utilization of liquid kinetic energy is improved, loss in liquid flowing is reduced, efficiency is improved, the disc serves as a power transmission medium, full-load starting can be achieved, the starting time is prolonged, the initial starting torque of a prime motor is reduced, and the prime motor can start a working machine through the maximum torque; in the transmission process, impact can be relieved, torsional vibration can be isolated, overload protection is achieved, and the low overload coefficient and high efficiency are achieved.

The invention relates to the technical field of electric driving systems, and discloses an electric driving system with a hydraulic torque converter and a forklift. The system comprises a driving motor, a hydraulic torque converter, a speed reducer and a vehicle control unit, wherein a lock-up clutch is integrated in the hydraulic torque converter; an output shaft of the driving motor is connected with a pump wheel input side of the hydraulic torque converter; a turbine output side of the hydraulic torque converter is connected with an input shaft of the speed reducer; the output end of the reducer is connected with a vehicle drive axle; when the vehicle is in the low-speed large-torque demand working condition, the lock-up clutch is controlled to be separated, so that the hydraulic torque converter works in the torque conversion working condition, and when the vehicle is in the low-speed large-torque demand working condition, the lock-up clutch is controlled to be separated; and when the vehicle is in a high-speed small-torque demand working condition, the lock-up clutch is controlled to be engaged, so that the pump wheel of the hydraulic torque converter is mechanically locked with the turbine, and the vehicle is in a coupler working condition. The power performance and the energy efficiency of the vehicle are improved, the cost of the electric drive system is reduced, and the economical efficiency and the NVH performance are improved.

The present invention discloses an automatic filling hydraulic coupler, comprising a shell filled with working fluid and a hydraulic coupler installed in the shell, wherein the hydraulic coupler comprises an output shaft, a shell, a turbine, a pump wheel, an input shaft and an oil inlet plate; the pump wheel is fixedly installed on the input shaft, the shell and the edge of the pump wheel are fixedly docked to form a mounting cavity, the turbine is placed in the mounting cavity and fixedly installed on the output shaft, and the pump wheel and the turbine are symmetrically arranged to form a working cavity; the oil inlet plate is fixedly installed on the pump wheel, and an oil inlet cavity communicating with the internal space of the shell is formed between the two, and a plurality of oil inlet holes communicating with the oil inlet cavity are arranged on the pump wheel. The present invention has a simple structure, high reliability, and a wide range of applications. It can be used in sealed and negative pressure environments, realizes the integration of motors, hydraulic transmissions and working machines, simplifies the transmission structure, improves the starting ability and load starting ability of the motor, overload protection, and increases the service life of the equipment.

The invention provides a vehicle starting control method and device, a power control unit and a vehicle air inlet system, and relates to the technical field of engines. The method comprises the steps of detecting a vehicle state; if the vehicle state is that the vehicle is in the starting stage and the clutch is in the fitting stage, the maximum available torque of the engine, the actual torque of the engine and the reference torque are obtained; if the difference value between the maximum available torque and the actual torque is smaller than or equal to a first preset threshold value, the specific value of the actual torque and the reference torque is smaller than or equal to a second preset threshold value, and the pressure of the air storage tank is larger than or equal to the safety pressure needed by braking; if yes, an electromagnetic valve between the gas storage tank and the engine is controlled to be opened through a power control unit of the vehicle, so that the gas storage tank provides gas for the engine. According to the method, the gas storage tank is additionally arranged in the gas inlet system of the vehicle, and when the preset conditions are met, the gas storage tank provides gas for the engine to improve the starting performance of the vehicle.

The invention provides a rotor assembly of a self-starting permanent magnet auxiliary synchronous reluctance motor and a motor, the rotor assembly comprises a rotor iron core and permanent magnets, the rotor iron core comprises an outer layer filling groove, an inner layer filling groove, permanent magnet grooves, a shaft hole and a rotor excircle, the shaft hole is located at the central axis position of the rotor iron core, and the permanent magnet grooves are located in the outer layer filling groove. The permanent magnet grooves are located in the periphery of the shaft hole so that the permanent magnets can be arranged in the permanent magnet grooves, the inner-layer filling grooves are located between the permanent magnet grooves and the outer circle of the rotor, and the outer-layer filling grooves are located between the inner-layer filling grooves and the outer circle of the rotor. The permanent magnet grooves, the inner-layer filling grooves and the outer-layer filling grooves form a magnetic barrier layer in the radial direction of the rotor, and the inner-layer filling grooves and the outer-layer filling grooves are filled with conductive conductors. According to the self-starting permanent magnet auxiliary synchronous reluctance motor, the problem of low starting torque of the self-starting permanent magnet auxiliary synchronous reluctance motor in the prior art can be solved.

The invention provides a portable storage battery starting control system and method for a helicopter, and belongs to the technical field of aircraft power system design. In the system, a portable storage battery pack is connected with a series starting distribution box; the first storage battery pack is connected with the direct-current power supply distribution box and the bus bar power controller; the second storage battery pack is connected with the direct-current power supply distribution box and the bus bar power controller; the direct-current power supply distribution box is connected with the bus bar power controller and the series starting distribution box; the series starting distribution box is connected with the bus bar power controller; the three-phase static converter is connected with the series starting distribution box and the starting electrical switch board; the bus bar power controller is connected with the starting electrical switch board. The three storage battery packs are connected in series, boosted and started and then are converted into two storage battery packs to supply power in parallel, so that the cadmium-nickel storage battery pack of the original machine can meet normal voltage output in a high-rate discharge state.

This application provides a motor rotor, a method for manufacturing the same, and a self-starting synchronous reluctance motor. The motor rotor includes a rotor core with magnetic barrier slots and a central shaft hole. The magnetic barrier slots include a Q-axis magnetic barrier slot located on the outermost side of the Q-axis and a D-axis magnetic barrier slot located between the Q-axis magnetic barrier slot and the central shaft hole, extending along the D-axis. The D-axis magnetic barrier slot includes a non-cast aluminum region and cast aluminum regions located at both ends of the non-cast aluminum region. The Q-axis magnetic barrier slot and the cast aluminum regions are filled with a conductive but non-magnetic material. Rotor baffles are provided at both ends of the rotor core. Each rotor baffle has a shielding portion capable of shielding the non-cast aluminum region. A connecting magnetic barrier slot is provided on the rotor baffle corresponding to the Q-axis magnetic barrier slot and the cast aluminum region. An end ring is provided outside the rotor baffle, at least partially covering the non-cast aluminum region. According to the motor rotor of this application, the volume of the end ring can be increased, improving the motor's starting capability.

The utility model relates to the technical field of gas turbine equipment, and discloses an electric starting system of a gas turbine, which comprises a starting motor, a frequency conversion controller, a gas turbine control system and an accessory gear box, and the output end of the frequency conversion controller is respectively connected with the input end of the starting motor and the input end of the gas turbine control system. The input end of the frequency conversion controller is connected with the output end of the gas turbine control system, the output end of the starting motor is connected with the accessory gear box, and a heat dissipation device is arranged on the starting motor. According to the utility model, not only can the gas turbine be started quickly and repeatedly, but also the heat dissipation of the starting motor can be ensured, and the electric starting effect of the gas turbine is effectively improved.

The invention provides a rotor of a two-pole synchronous reluctance motor and the two-pole synchronous reluctance motor. The rotor comprises a radial magnetic flux rotor iron core which is coaxially arranged with a transmission shaft of the two-pole synchronous reluctance motor. A plurality of magnetic isolation grooves which extend in the d-axis direction of the rotor and penetrate through the rotor iron core in the axial direction of the rotor are formed in the rotor iron core, and the lamination plane of the rotor iron core comprises a first area overlapped with the projection of the transmission shaft in the d-axis direction of the rotor; the magnetic isolation grooves, located in the first area, in the multiple magnetic isolation grooves are filled with a conductive material. Compared with a traditional asynchronous starting dipolar ferrite permanent magnet synchronous reluctance motor, the dipolar ferrite permanent magnet synchronous reluctance motor and the rotor of the dipolar ferrite permanent magnet synchronous reluctance motor have the advantages that the starting capability and locked-rotor torque of the motor are obviously improved, the average torque and power density can be improved, the power factor of the motor is improved, and the efficiency of the motor is improved.

This utility model discloses an AC starting system for generator sets, belonging to the field of engine technology, which solves the problems of insufficient torque and easy motor overheating in existing generator sets during continuous use. The AC starting system includes a motor power output system, the output end of which meshes with a flywheel ring gear. It also includes an AC starter motor and a belt. The AC starter motor is mounted on one side of the engine, with a drive pulley at its output end and a driven pulley at the power input end of the motor power output system. The drive pulley and driven pulley are connected by a belt drive. The bottom of the AC starter motor has an adjustment device for adjusting the belt tension, including an upper base and a lower base. The AC starter motor is mounted on the upper base. This AC starting system for generator sets can be used continuously for extended periods.

This application provides a motor rotor and a self-starting synchronous reluctance motor. The motor rotor includes a rotor core (1) and end rings (7) disposed at both ends of the rotor core (1). Magnetic barrier slots are provided on the rotor core (1), including cast aluminum slots (5). Guide bars (9) are disposed in the cast aluminum slots (5). The end rings (7) are connected to at least a portion of the guide bars (9) to form a loop. On the longitudinal section passing through the central axis of the rotor core (1), the longitudinal cross-sectional area of ​​one side of the end ring (7) is Se, and the cross-sectional area of ​​the guide bars (9) perpendicular to the central axis of the rotor core (1) is Sr. The longitudinal cross-sectional area Se of the end ring (7) at any position is proportional to the cross-sectional area Sr of the guide bars (9) forming the loop with the end ring. According to the motor rotor of this application, at any time, the cross-sectional area of ​​the end ring is equivalent to the cross-sectional area of ​​the guide bars forming the loop, which can effectively improve the torque pulsation caused by the sudden change in resistance and ensure the starting capability of the motor.

The embodiment of the application provides a civil large-bypass-ratio turbofan engine windmill performance flight test method, and relates to the technical field of airplane engines. The civil large-bypass-ratio turbofan engine windmill performance flight test method aims at improving the problem that the windmill starting performance of the civil large-bypass-ratio turbofan engine needs to be further improved. The civil large-bypass-ratio turbofan engine windmill performance flight test method comprises the following steps: obtaining a windmill performance flight test point; controlling a test engine to perform a windmill performance flight test according to the priority of the windmill performance flight test point; and recording windmill performance according to the windmill performance flight test. Through the civil large-bypass-ratio turbofan engine windmill performance flight test on a flight platform, an engine overall performance windmill state model is checked and corrected, and the windmill starting performance of the civil large-bypass-ratio turbofan engine is improved.