168results about How to "Increase starting torque" patented technology

A permanent magnetism synchronous hub motor for electrically driven vehicle direct drive comprises shafts, a left end cover, rotors, stators, a right end cover, a rotating transformer, bearings are arranged on the shafts, inner rings of the left end cover and the right end cover are connected with the bearings in interference fit, stators are hot sleeved on the support of the shaft, the left end cover, the right end cover and the rotors are jointed together by bolts, the rotors are composed of rare earth magnet steels at interval adhering in the inner wall of the support by the magnet steel glue. The invention can be mounted in the vehicle wheel hub for directly driving the vehicle wheel and save traditional drive devices, thereby simplifying the whole vehicle structure, improving the drive efficiency and using the space effectively; the invention is an outer rotor motor without reduction gear mechanism, has small volume, large power, large starting moment, good control performance and low energy consumption, can reduce the whole vehicle weight and the maintenance cost and improve continued mileage and battery life.

The invention relates to a micro-size permanent-magnet single-phase synchronous motor which comprises a stator and a permanent-magnet rotor which are same in pole number, wherein an AC (Alternating Current) power supply supplies electricity to the stator through the switch of a control circuit; an air gap is narrowed along a same peripheral direction under each pole so that the axial lines of the poles of the permanent-magnet rotor deflect an acute angle in a free state by taking the axial line of one closest pole of the stator as a reference; a linear magnetic position sensor is arranged on the peripheral preset position of the permanent-magnet rotor to detect the polarity and the position of the permanent-magnet rotor; the control circuit determines the axial direction of the permanent-magnet flux of various poles of the permanent-magnet rotor through the output of the linear magnetic position sensor by taking the peripheral preset position as the reference; and the control circuit detects the polarity of voltage which is supplied by the AC power supply to the stator to determine the axial directions of main fluxes generated at all the poles and control the half-waves of the AC power supply one by one according to a rotation direction set for the permanent-magnet rotor. The micro-size permanent-magnet single-phase synchronous motor disclosed by the invention can start and operate according to the preset rotation direction and is good in property and simple and reliable in control structure.

The invention discloses a balancing vehicle system and a control method thereof. According to a difference equation model and a drift error model of attitude signals of the balancing vehicle system, astate equation of an extended Kalman filter and a mathematical model of a permanent magnet linear motor are established. A second-order dynamic Terminal sliding film is used to drive permanent magnetsynchronous motor. Particle Swarm Optimization (PSO) is used to optimize the parameters of tracking controller, synchronization controller, clearance elimination controller and switching function ina two-motor system. The invention realizes that the signal collected by the sensor of the balancing vehicle has large noise and zero drift error, and solves the problem of poor robustness and the problem that the Brush motor structure is complex, fault, maintenance workload, short life, commutation spark easy to produce electromagnetic interference, as well as in the balance of the car in the process of running jitter, deviation is too large, and low security.

The invention relates to a modular frame type high-efficiency vertical axis wind turbine. The modular frame type high-efficiency vertical axis wind turbine comprises a wind wheel spindle, a step-up gear box, a permanent magnet synchronous generator, a wind power control cabinet and a peripheral foundation, and is characterized by further comprising a resistance type wind wheel, a force lifting type wind wheel, wind direction flow guide plates and transverse supporting structures; the resistance type wind wheel is mounted on the top of the wind turbine, and the lower part of the resistance type wind wheel is connected with the wind wheel spindle; the force lifting type wind wheel has a three-layer stacked impeller structure, a corresponding section of the wind wheel spindle is arranged in the center of each layer of the force lifting type wind wheel, each layer comprises a plurality of blades, each blade is connected with the corresponding section of the wind wheel spindle through a wind wheel support, and the different sections of the wind wheel spindle are flexibly connected through shaft sleeves; all the blades on the three layers are arranged in a staggered manner, projections of all the blades on the horizontal plane are distributed in a circular area, and the number of the blades in each layer is an odd number; and each wind wheel support comprises a rectangular frame, and one end of each rectangular frame is connected with the wind wheel spindle.

The invention provides an efficient energy-saving dual salient pole synchronous reluctance motor, comprising a motor mechanical body and a motor control part; wherein, the motor mechanical body comprises a motor shell, a stator which is arranged on the internal wall of the motor shell and a rotor which is arranged at the center in the motor shell; the rotor is arranged on a motor shaft; the motor mechanical body also comprises a motor end cover which is arranged at the two ends of the motor shell; the motor shaft is connected with the motor end cover by a bearing; a shaft sleeve and an oil seal are arranged between the internal end surface of the bearing and the rotor; wherein, the rotor is provided with 8 salient poles; the stator is provided with 12 salient poles and 12 winding coils which are corresponding to the 12 salient poles.

The invention provides an oil-submerged pump direct-drive ultra-slender concentrated winding permanent magnet motor and a manufacture method. The oil-submerged pump direct-drive ultra-slender concentrated winding permanent magnet motor comprises a motor unit, wherein the motor unit comprises a stator core of a split type structure, the stator core is assembled into an annular shape by multiple core blocks with windings, each core block with one winding comprises a slender core block and a winding copper wire, each slender core block is formed by overlaying T-shaped punched pieces and is provided with a stator tooth, and the winding copper wires are wound on the stator teeth. The manufacture method of the permanent magnet motor comprises the steps of overlaying the T-shaped punched pieces to form the slender core blocks, and winding the winding copper wires on the stator teeth to form the core blocks with the windings; connecting the multiple core blocks with the windings in sequence along the peripheral direction and assembling to form the annular stator core; arranging the annular stator core into an enclosure by press-fitting. The winding process of the core blocks with the windings is easy to realize, and the manufacturing is simple.

The invention relates to a direct-drive type permanent magnet synchronous motor dedicated to mine hoister, which is a driver motor dedicated to large machinery equipment, belonging to the technical field of electromotor. The direct-drive type permanent magnet synchronous motor dedicated to mine hoister provided by the invention can improve driving efficiency of the mine hoisting system, reinforce reliability of system running, reduce maintenance difficulty and dispense with reduction gears. The direct-drive type permanent magnet synchronous motor dedicated to mine hoister comprises a motor shell, a rotor embedded with a permanent magnet is arranged at the center in the motor shell, a stator magnetic core winded with stator winding is arranged at the outside of the rotor, and the stator magnetic core is fixed on the motor shell. The invention is characterized in that the stator winding is connected with a frequency converter by leads.

The invention relates to a novel permanent magnetic synchronous motor, which is mainly applied to high-energy-consumption industries such as iron and steel, electrical power, petrochemical engineering, machinery and the like. The novel permanent magnetic synchronous motor mainly comprises a stator and a rotor assembly, wherein the rotor assembly comprises a rotating shaft, an inner lining sleeve is fixedly connected in the middle part of the rotating shaft through a flat key, the outer side of the inner lining sleeve is fixedly connected with permanent magnet steel and a shaft sleeve, the shaft sleeve is divided into a plurality of blocks which are fixedly connected with the inner lining sleeve through fastening connecting elements, gaps are arranged between the shaft sleeve cutting blocks divided by the shaft sleeve, permanent magnetic steel is fixedly embedded in the gaps, the permanent magnetic steel can be set into four blocks, six blocks or eight blocks according to the step number of the motor, and the fastening connecting elements can adopt screw bolts and splayed pins. The novel permanent magnetic synchronous motor uses permanent magnets for replacing electric magnetic excitation magnetic poles, realizes the brushless structure, reduces the size of a rotor, omits a magnetic excitation DC power supply, and greatly improves the efficiency of the motor, and the power factor of the novel permanent magnetic synchronous motor is greatly higher than the power factor of an asynchronous motor.

The invention discloses a starting method for a brushless direct-current excitation synchronous motor. The method includes the following steps of: S1, asynchronous starting closed-loop vector control process: three-phase reference voltage Va, Vb and Vc can be obtained according to three-phase stator current Ia, Ib and Ic of the synchronous motor, and the three-phase reference voltage Va, Vb and Vc c are subjected to pulse-width modulation and are outputted to stator windings of the synchronous motor so as to perform excitation; S2: transition closed-loop vector control process: when the rotation speed of the synchronous motor achieves preset rotation speed, excitation provided by the stator windings is gradually switched to excitation provided by a brushless direct-current excitation device; and S3: synchronous closed-loop control process: when all excitation is switched to excitation provided by the brushless direct-current excitation device, the synchronous motor enters a synchronous operation process. The starting method for the brushless direct-current excitation synchronous motor of the invention has the advantages of simple control, low starting current, excellent speed adjusting performance and high starting torque.

The invention discloses a graded frequency conversion stepless voltage regulating soft starting device based on a non-speed sensor, and belongs to the technical field of starting of motors, and the device is mainly used for solving the problems that the existing soft starting device has reduced starting voltage, consequently the starting torque is seriously reduced, and the heavy-duty starting is hard. The graded frequency conversion stepless voltage regulating soft starting device is mainly characterized by being composed of a main loop which is composed of five groups of sequentially-connected antiparallel controllable silicon groups, and a main loop control circuit, wherein the main loop control circuit comprises a DSP (digital signal processor) controller, a current signal zero cross detection circuit, a voltage sampling circuit, a current sampling circuit, a synchronous signal collection circuit and a driving circuit; and the voltage sampling circuit and the synchronous signal collection circuit are connected between the main loop and a DSP, the current sampling circuit and the current signal zero cross detection circuit are connected between the main loop and the DSP, and the driving circuit is connected between each silicon controlled end and the DSP. The graded frequency conversion stepless voltage regulating soft starting device provided by the invention has the characteristics that the starting current is small, the starting torque is high, the frequency division section switching is smooth, and the graded frequency conversion stepless voltage regulating soft starting device is mainly used for a three-phase asynchronous motor belt heavy-duty starting occasion.

The invention relates to a uniform powdery material feeding device which comprises a tank body, wherein the top of the tank body is provided with a stepping motor and a speed reducer, wherein the stepping motor is connected with the speed reducer; the speed reducer is used for transferring power to a transmission shaft; the middle upper part of the transmission shaft positioned in the tank body is connected with a material overturning tool fixing rack which is connected with a material overturning tool used for overturning materials in the tank body; the lower end of the transmission shaft is connected with a uniform feeding control component. According to the scheme, the powder material feeding precision can be precisely controlled, and the uniform powdery material feeding device is high in popularization value.

The invention relates to large-discharge electric submerged screw pump oil extracting equipment. Compared with the traditional electric submerged screw pump oil extracting equipment which belongs to a large-discharge series and also mainly comprises an underground motor, an underground rotating type mechanical drive device, an underground screw pump, and the like, the large-discharge electric submerged screw pump oil extracting equipment has the technical scheme key that the underground screw pump is connected with an underground multistage motor by the underground rotating type mechanical drive device; the screw pump is rigidly fixed on the sleeve pipe wall of an oil well by adopting the underground multistage motor with high torque output and vibration resistance, a drum-gear coupling with high torque output, vibration resistance and an opening type structure, a series combined stopping type bear joint and an underground rotating type mechanical drive device of a compensating type lubricating oil tank through an anchoring device; the problem of oil leakage of an oil pipe of a large-gradient well or a horizontal well is solved by adopting a hydraulic type oil pipe oil drainer; and the large discharge of the electric submerged screw pump is realized by the technical measures, and thus the invention can be used for the oil well with large-discharge (more than 200m<3>/d) on the electric submerged screw pump.

The invention provides an axial structured permanent-magnet motor which is applicable for fields of a motor and a power generator. The axial structured permanent-magnet motor comprises two stators and a rotor, wherein the rotor is arranged between the two stators, and a gap exists between the stators and the rotor. In the axial structured permanent-magnet motor, the stators and the rotor are matched, the power density and the mechanical characteristic of the motor can be improved, and the fabrication cost of the motor is reduced; and the motor efficiency can be remarkably improved with the low loss characteristics of the stators made of amorphous and nanocrystalline material, the starting torque of the motor also can be increased with the high-permeability characteristics, and the output hardness of mechanical characteristic of the motor under a high rotational speed also can be improved with the wideband characteristics.

Disclosed is a parking pallet transverse moving drive device. Rails are arranged on a ground parking space, parking pallets are arranged on the rails, rollers are arranged on the parking pallets, and each parking pallet is driven by a motor to bilaterally move on the rails. The parking pallet transverse moving drive device is characterized in that a direct-current motor is arranged on each parking pallet, a power supply brush carrier is arranged on the back surface of each parking pallet, a positive power supply brush and a negative power supply brush are arranged on each power supply brush carrier, a positive conducting rail and a negative conducting rail are bilaterally arranged on the ground parking space below the parking pallets, the positive power supply brush and the negative power supply brush slide on the two conducting rails to acquire direct-current voltage, each direct-current motor drives the corresponding parking pallet to bilaterally move on the rails, the device is used on the parking pallets needing transverse moving, the direct-current motors on the parking pallets acquire power from the positive conducting rail and the negative conducting rail on the ground parking space, the parking pallets do not need power wires, the failure rate of the parking drive device can be effectively decreased, and the running condition of the device is improved.

The invention discloses a novel tri-power, efficient, energy-saving three-phase asynchronous motor used for an oil extractor, which comprises a rotor and a stator winding; the stator winding adopts the unique 3Y composite series connection method and the novel technology of turn removal; the stator winding corresponds to a low power grade, a medium power grade and a high power grade, and the number of turns of serial coils in each phase reduces with the power grade, with the low grade power corresponding to a maximum number of turns and the high grade power corresponding to a minimum number of turns; and the switch among the three power grades is achieved by three contactors. As the invention has the high, the medium and the low power grades which are all available for option, and the high power grade has a high start-up torque and is applied to starting the oil extractor, the motor can automatically operate at the low or medium power grade on the completion of the start-up process, and can realize two-way automatic switch of operating power according to the change in the working condition of an oil well. As the motor has the advantages of great start-up torque, high operating efficiency and power factor, convenient control, good reliability and remarkably reduced no load current, the motor can achieve better energy-saving effect.

The invention relates to a mouse-cage type tapered rotor electromotor, and the main design of the electromotor comprises that: an inner cavity of a stator and the surface of a rotor of the electromotor are tapered; the tapered rotor is simultaneously used as a brake. After a triphase winding of the stator is connected with a power supply, an axial magnetic pull force is generated to allow the rotor to generate axial movement; an axial braking spring is drawn; and the tapered rotor is pushed to enable the normal operation of the electromotor; when the electromotor is needed to be stopped, the power supply of the electromotor is powered off; and then the axial magnetic pull force disappears; under the action of resilience of the spring, the tapered rotor rapidly brakes to allow the rotor to stop rotating immediately, thereby realizing the function of rapid braking.

The invention discloses a driving motor assembly for an electric vehicle. The driving motor assembly comprises a machine casing, a motor housing, an outer rotor brushless permanent magnet motor, a speed reducer and a brake, wherein the outer rotor brushless permanent magnet motor is arranged in the motor housing, the speed reducer is arranged in the machine casing, the brake is connected with themotor housing, the outer rotor brushless permanent magnet motor comprises a motor shaft, and the brake is connected with the motor shaft; the speed reducer comprises a first floating inner gear ring and a second floating inner gear ring, an inner gear of the speed reducer is in a split type, and comprises the first floating inner gear ring and the second floating inner gear ring, different modulican be set for planetary gears which achieve different stages of speed reduction, and the size of the speed reducer is reduced; the outer rotor brushless permanent magnet motor is adopted for the motor, and has large rotor rotation inertia, a small axial size, a steady rotation speed, high efficiency and large starting torque; besides, the machine casing is slidably connected with the first floating inner gear ring and the second floating inner gear ring through sliding keys and key grooves, and reduction of running noise of the speed reducer is facilitated.