488 results about "Synchronous motor" patented technology

The invention discloses a performance simulation method, system and equipment of a synchronous motor and a medium, and relates to the technical field of motor engineering and simulation technologies. According to the method, electromagnetic parameters are obtained based on a geometric structure, material attributes and current parameters of a motor; according to loss data in the electromagnetic parameters, calculating to obtain a temperature distribution data set of each component in the motor; according to the electromagnetic force and temperature distribution data set in the electromagnetic parameters, calculating stress distribution and deformation of each component in the motor; carrying out fusion processing on the electromagnetic parameters, the temperature distribution data set and the stress distribution to obtain a fusion data set; fusing the data set to obtain an initial multi-physics field coupling model; performing parameter correction on the initial multi-physics field coupling model to generate a synchronous motor multi-physics field coupling model; and performing simulation according to the synchronous motor multi-physics field coupling model to obtain performance simulation data. By implementing the technical scheme, a reliable basis can be provided for design optimization, performance analysis and fault diagnosis of the motor.

The invention relates to the technical field of new energy grid connection, in particular to a new energy grid-connected inverter system based on a double-stator synchronous motor interface, which comprises a three-phase inverter and a double-stator synchronous motor, the double-stator synchronous motor comprises a first stator, a rotor and a second stator. Planar air gaps exist between the rotor and the first stator and between the rotor and the second stator. The rotor comprises a first rotor and a second rotor which are rigidly connected, the first rotor is axially adjacent to the first stator, the second rotor is axially adjacent to the second stator, and a magnetic isolation ring is arranged between the first rotor and the second rotor; each of the first stator and the second stator comprises a stator core and an armature winding, the first rotor comprises a first rotor core, an excitation winding and a starting winding, and the second rotor comprises a second rotor core and a permanent magnet. According to the invention, the double-stator configuration can realize voltage transformation and frequency conversion functions, and can solve the problems of reduced power grid inertia, insufficient short-circuit capacity, aggravated broadband oscillation risk and the like caused by grid connection of large-scale new energy through power electronic equipment.

The invention relates to the technical field of driving control of symmetrical vacuum pressure control valves, in particular to a zero-point-free zero returning method of a double-position synchronous motor for a symmetrical vacuum pressure control valve, which is suitable for scenes needing high-precision pressure control, such as semiconductor manufacturing, vacuum coating, precision vacuum detection and the like. The problems that in the prior art, the vacuum sealing performance is damaged by depending on a special sensor, cost is high, abrasion of a sealing ring is aggravated due to zero point fixation, and double-shaft synchronization precision and load distribution are disjointed are solved. According to the method, the position where the sealing ring reaches the sealing pre-tightening force serves as a dynamic non-fixed zero point, an additional zero point sensor or a collision sensor or a horizontal sensor is not needed, the current-torque coupling characteristic of a motor is utilized, and full-process automatic control is achieved through a high-precision Hall current sensor and an incremental encoder. The method comprises the following specific steps: initializing motor parameters, establishing a T = K * I mapping relation, calibrating a current overload threshold value, calibrating a current detection module, synchronously starting and operating double motor shafts, identifying a collision state based on current detection, locking and verifying a zero returning position, and judging zero point uniqueness based on torque uniformity. The double-shaft zero returning repetition precision is high, zero point uniqueness judgment fits the actual working condition, uneven abrasion of the sealing ring can be reduced, the service life of the sealing ring and the maintenance period of the valve are prolonged, meanwhile, the equipment manufacturing cost and the maintenance difficulty are reduced, and the vacuum sealing stability and the pressure control precision of the symmetric vacuum pressure control valve are effectively improved.

The invention belongs to the field of synchronous motor rotor position signal acquisition and processing, and particularly relates to a resolver angle compensation method which can improve the motor rotor position signal detection precision. The method comprises the following steps: step 1, acquiring rotary power transformation angle values of n periods; 2, determining an error array of n periods according to the electrical angle value of each period; step 3, performing interpolation calculation on the error array of n periods to obtain a 2-degree error distribution array; and 4, compensating the real-time sampling rotary power transformation angle according to the 2-degree error distribution array.

The invention discloses a synchronous motor modular excitation active vibration suppression method for eccentric vibration, and the method comprises the steps: dividing a rotor excitation winding into 2P independent current control excitation modules in the circumferential direction, and respectively arranging an X-direction displacement probe and a Y-direction displacement probe, obtaining a first displacement signal and a second displacement signal of the rotor mass center relative to the stator and a rotor mechanical angular speed; performing band-pass filtering on the first displacement signal and the second displacement signal, and extracting a first displacement first-order component and a second displacement first-order component; calculating the shortest air gap direction angle and the eccentricity amplitude under the stator coordinate system, calculating the eccentricity, and calculating a first-order eccentricity coefficient; calculating a shortest air gap direction angle under a rotor coordinate system, and calculating an equivalent correction coefficient; and according to the equivalent correction coefficient, the first-order eccentricity coefficient, and the shortest air gap direction angle and the mechanical position angle under the rotor coordinate system, the injection amount of each excitation module is calculated, an excitation current instruction is generated and output to the corresponding excitation module, and active suppression of the unbalanced magnetic pulling force is realized.

The invention relates to the technical field of distributed energy grid-connected control, in particular to an intelligent monitoring ball enhanced distributed power supply coordination pre-synchronization control method and system, and the method comprises the steps: deploying a master intelligent monitoring ball at a grid-connected point, deploying slave intelligent monitoring balls at the output ends of all distributed power supplies, and forming a star-shaped sensing network; based on a multi-objective optimization algorithm, calculating a pre-synchronization target parameter and an adjustment weight of each distributed power supply, and generating a coordination control instruction; the virtual synchronous motor module receives the coordination control instruction, dynamically adjusts a virtual inertia and a damping coefficient, and adjusts output voltage, frequency and phase through a pre-synchronization execution unit; and after the synchronization reaches the standard, sequentially closing the grid-connected switches according to a preset power supply response priority sequence to complete the grid-connected action. According to the invention, a technical architecture of global monitoring-coordinated decision-precise execution-closed loop optimization is constructed, so that the stability and precise control problem during high-permeability distributed energy grid connection is solved.

The invention relates to the field of construction tools, in particular to light foam concrete pouring and conveying equipment which structurally comprises a base, a horizontally-arranged discharging device is arranged at the top of the base, an upper cover plate is installed on the upper surface of the discharging device, a feeding pipe is arranged on one side of the upper cover plate, and the discharging device comprises a guide pipe and a buffer. The buffer is connected with a feeding hopper, the feeding hopper and a bottom pipe at the bottom form a groove body, a rotary feeding rod is arranged in the buffer and the bottom pipe, the feeding rod is connected with a driving motor main shaft installed outside the feeding hopper, the synchronous motor drives the middle pipe to rotate, and the synchronous motor is electrically connected with a driving motor main board. The long-distance conveying capacity of foam concrete is achieved, defoaming in the start-stop process is greatly reduced, the effective pushing torque of the feeding rod is concentrated in the axial conveying direction by means of the segmented design of the pre-conveying section and the conveying section of the feeding rod and the radial limiting effect of the buffer, radial overflow of materials is restrained, and damage to foam caused by radial shearing is reduced.

The invention discloses a device and method for improving synchronous tracking precision of a double-permanent-magnet synchronous motor motion platform servo system, and belongs to the technical field of numerical control. Synchronous control of the double permanent magnet synchronous motors is realized by using the preset performance cross coupling controller; estimating system lumped disturbance through a self-adaptive extended state observer, and inhibiting the system lumped disturbance by adopting a novel sliding mode maker; according to the novel sliding mode controller, an exponential function term and a power function term are added in the reaching law to enable the system state to converge rapidly, when the system state is close to a sliding mode surface, the exponential term in the reaching law is attenuated rapidly, the improved power function term plays a leading role, convergence stagnation caused by premature reduction of the reaching rate is avoided, the adaptability of the reaching rate is enhanced, and the control precision is improved. The arrival time is reduced. A sigmoid function is used for replacing a switching function, continuous control input is achieved, and high-frequency buffeting is weakened. And the high-performance Hall sensor and the incremental encoder are adopted, so that the signal acquisition precision is improved.

The invention discloses a sensorless control method for an electrically excited synchronous motor based on a rotor switching signal, and relates to the technical field of motor control, the inherent high-frequency modulation switching signal of an EESM rotor circuit (in a buck converter form) is utilized, and an effective stage (AS) and an ineffective stage (IAS) are divided based on the unipolarity characteristic of a rotor modulation voltage; a stator current gradient is directly calculated at the AS to extract position information, a fundamental current component is estimated at the IAS to be used for compensation, magnetic coupling saturation compensation and rotor PWM frequency optimization are combined, and full-rotating-speed sensorless control is achieved.

The alternating-current synchronous motor comprises a stator shell and a rotor, the stator shell is arranged on the ground, the rotor is arranged in the stator shell through an end cover and an insulating bearing, the rotor comprises a rotating shaft and a rotor iron core, the rotor iron core is arranged on the rotating shaft, and a tooth groove set is formed in the rotor iron core in a concave mode. The tooth groove group is composed of a plurality of adjacent tooth grooves, and the windings are arranged in the tooth grooves. The motor has the advantages that the relative positions of the stator and the rotor tooth grooves are collected through the rotor position sensor, the current of the three-phase alternating current and rated torque input are collected through the current sensor, the magnitude of the current of the three-phase synchronous alternating current is controlled, the torque of the motor is controlled, and winding arrangement is optimized, so that the reliability of the motor is improved. In the working process, the magnetic potential direction of the rotor is perpendicular to the magnetic potential direction of the stator at any position, then the maximum torque under the current is output, and meanwhile, the stator permanent magnet cannot be demagnetized due to the change of the magnetic field of the rotor.

The utility model provides a Wuyi rock tea multi-layer circulation rolling type spreading and cooling machine which comprises a supporting bottom plate, fixing plates are arranged at the left end and the right end of the upper surface of the supporting bottom plate, synchronous motors are embedded in the peripheries of the inner side faces of the fixing plates, gears are arranged on output shafts of the synchronous motors, and the gears are connected with the supporting bottom plate. The gears on the periphery are connected in a meshed mode through a cog belt to rotate, an air opening is formed in the fixing plate, and the air opening is connected with an air inlet hopper. A placing and spreading-cooling piece for placing tea leaves is arranged between the tooth-shaped belts at the left end and the right end; according to the utility model, tea leaves can be automatically turned over, and the ventilation uniformity and the spreading cooling efficiency are improved.

The invention discloses a permanent magnet synchronous motor locked-rotor temperature estimation method and device, and relates to the technical field of synchronous motors, and the method comprises the steps: collecting a preset number of motor states obtained under different locked-rotor working conditions and corresponding temperature data, and constructing a corresponding training data set; according to different motor cooling structures, constructing a motor stalling temperature estimation architecture based on the correlation between motor states and the influence factors of the motor states; a differential evolution training method based on fuzzy control uses the training data set to train the motor locked-rotor temperature estimation architecture to obtain a motor locked-rotor temperature estimation model; and obtaining a motor state of a to-be-estimated motor, and inputting the motor state of the to-be-estimated motor into the motor locked-rotor temperature estimation model to obtain the current temperature of the motor under the locked-rotor working condition. According to the invention, the problem that the accuracy is low when the stalling temperature of the permanent magnet synchronous motor is estimated in the prior art is solved.

The invention relates to the technical field of power system simulation, in particular to a twelve-phase synchronous motor VBR modeling method, which comprises the steps of motor grouping modeling; integrating a magnetic saturation effect; and interphase coupling modeling. The method has the advantages that the VBR model is successfully expanded to a twelve-phase (four-group three-phase) synchronous motor, the limitation that a traditional three-phase model and a traditional six-phase model cannot be directly applied to a high-phase-number asymmetric motor is overcome, the coordinate transformation problem caused by a complex winding structure is effectively solved through the multi-stator modeling framework and the projection matrix technology, and the method is suitable for large-scale popularization and application. An effective modeling solution is provided for high-phase-number motor simulation; by introducing a differential inductance matrix and a magnetization coupling matrix into a dq0 coordinate system, the model can accurately describe electromagnetic characteristics of the motor in different saturation states; the model considers the mutual coupling effect among all three-phase units, solves the problem that a traditional model is difficult to accurately simulate complex magnetic saturation and interphase coupling of a twelve-phase motor, and remarkably improves the simulation precision.

The invention discloses a rotor position detection method for multiplexing a synchronous motor body as a rotary transformer, and the method comprises the following core steps: a, independent detection windings (2) are embedded in grooves of a stator (3), the number of detection coils contained in each phase of independent detection winding (2) is equal to 1 / 2n of the number of rotor salient poles (4), and n is a natural number smaller than 10; b, detection coil parameters of all the independent detection windings (2) are completely consistent, the electrical phase difference between the independent detection windings (2) of each phase is equal to 360-degree electrical angle divided by the phase number of the independent detection windings, and the independent detection windings (2) are uniformly distributed on the inner circumference of a stator slot; c, the independent detection windings (2) of all phases are sequentially connected in series end to end and then connected into a carrier signal generated by a carrier generator, and the real-time angle position of the rotor salient pole (4) is calculated through a precise full-wave rectifier, a potential translation circuit and a position conversion module. A solid rotor position sensor is abandoned, a synchronous motor body is reused as a core component of a rotary transformer, and sensorless rotor position detection is achieved; the device adapts to special working conditions such as high temperature, strong electromagnetic interference and full sealing; according to the invention, excitation current interference is eliminated, the detection precision is improved, position closed-loop control in a zero-speed-full-speed range is realized, the response speed is high, the control precision is high, the production cost is low, and the synchronous motor is suitable for various synchronous motors with rotor magnetic resistance anisotropy and circumferential uniform distribution, such as a new energy automobile dragging motor, a linear motor and a household appliance totally-enclosed compressor.

The present invention relates to a drive control device for a synchronous motor. To provide a drive controller of a synchronous motor capable of suppressing torque ripples of sixth order, twelfth order, etc., which cannot be suppressed by a basic drive controller.SOLUTION: The drive control device of the synchronous motor comprises at least a means for generating a final current command value for suppressing a specified torque ripple and a current control means for performing discrete time control of a stator current so as to follow the final current command value, wherein a discrete time compensating current controller arranged in parallel to a PI current controller and having a pole on a unit circle with a zero point as an origin and multiplying a control gain and a control period by a control deviation is added to the discrete time current controller being a central device of the current control means.SELECTED DRAWING: Figure 5

The utility model discloses a kind of lengthened shaft motor direct-drive vertical mill speed reducer structures, including driving assembly, transmission assembly and helical tooth big gear ring, driving assembly includes motor casing, stator, rotor, bearing and the rotor shaft of rotor integration, transmission assembly includes pinion, bearing tile seat, lengthened shaft, lengthened shaft one end passes through bearing tile seat and is connected with pinion, pinion is engaged with helical tooth big gear ring, the other end of lengthened shaft is fixedly connected with rotor shaft by connecting flange, the front end cover of rotor shaft outer periphery motor casing is set up guide pulley device, guide pulley device includes guide pulley support and guide pulley upper;The shaft end of synchronous motor and transmission assembly share a bearing, avoid the drawbacks that motor sets up three point support, easy to damage bearing, guide pulley device is designed, guide pulley device plays the role of adjusting gap during motor factory test and motor assembly lengthened shaft debugging, guide pulley in guide pulley device plays auxiliary role when motor works.

An electric propulsion system for an aircraft, comprising: - an electrical power source (1) including a synchronous generator (11) driven by a heat engine (12), - a first synchronous electric motor (3) connected to an output of the synchronous generator by an alternating current electrical circuit (2), - a rotating propulsion unit (7), characterized in that it comprises: - a direct current electrical circuit (4) comprising, from an input connected to the alternating current electrical circuit: a first alternating / direct current converter (41), a direct current electrical link (42) and a second direct / alternating converter (43), - a second electric motor (5) connected to an output of the direct / alternating converter, - a differential gear train (6) including a first input shaft (61) connected to the first synchronous electric motor,a second input shaft (62) connected to the second electric motor and an output shaft (63) connected to the rotating propulsion unit. Figure for the abbreviation: Figure 1,

The present application belongs to the field of rail transit vehicle testing technology, and particularly relates to a rail transit vehicle axle fatigue testing device and method. The device comprises a mounting seat, two actuating cylinders arranged side by side on the upper surface of the mounting seat, a force sensor installed at the upper end of the actuating cylinder, a first bearing seat connected to the upper end of the force sensor, an axle installed between the two first bearing seats, one end of the axle connected to the output shaft of a first motor through a universal coupling, a loading wheel installed on the left and right parts of the axle, a synchronous wheel arranged below the loading wheel, the synchronous wheel installed on a second bearing seat through a rotating shaft, the second bearing seat installed on a base, the base arranged on the mounting seat, a synchronous motor arranged between the two synchronous wheels, and the output shaft of the synchronous motor connected to the rotating shaft. The present application can perform different standard tests on the axle, such as EN standard fatigue test and GOST standard fatigue test.

The utility model discloses a direct-drive electro-magnetic annular synchronous motor, and belongs to the technical field of large-scale synchronous motors. The motor comprises a split stator which is formed by splicing and fixing a plurality of stator petals along the circumferential direction; the block magnetic poles form a motor rotor, a plurality of independently-formed magnetic pole units are arranged at intervals in the circumferential direction, and each magnetic pole unit is directly and fixedly installed on the outer wall of the load rotating cylinder; the supporting and sealing structure is arranged at the axial end part between the split stator and the block magnetic pole and is used for sealing a gap between the split stator and the block magnetic pole; and the collector ring and brush carrier system is arranged at one axial end of the motor, and the output end of the collector ring and brush carrier system is electrically connected with the excitation windings of the block magnetic poles. According to the utility model, the split stator and the block magnetic pole structure are adopted, so that the transportation and field installation of the ultra-large motor are facilitated; the rotor is directly mounted on the outer wall of the milling cylinder to realize direct drive, a gear transmission link is omitted, the transmission efficiency is high, and operation is stable; a multi-layer sealing structure adapts to a high-dust environment, and the reliability is high; the speed regulation performance is good and the maintenance is convenient.

The utility model relates to the technical field of mask processing, in particular to a mask liquid soaking device which comprises a main body mechanism used for containing soaking liquid, a soaking mechanism used for completely soaking a mask is arranged on the main body mechanism, and an auxiliary mechanism used for simply and conveniently taking the soaked mask is arranged on one side of the main body mechanism. The soaking mechanism comprises two fixing rods, and the tops of the two fixing rods are fixedly connected with a connecting rod. According to the mask soaking device, by arranging the soaking mechanism, a mask and soaking liquid can be completely soaked, two synchronous motors drive two rotating discs to eccentrically rotate, two adjusting rods can reciprocate by the two rotating discs, and two fixing rods can drive a connecting rod to reciprocate up and down; the mask paper is pressed and fixed through the fixed net plate and the movable net plate, so that the mask paper is not prone to deviation in the moving and soaking process, and the soaking effect of the mask is guaranteed.

The invention discloses a synchronous motor rotor state detection method and device, relates to the technical field of motors, and mainly aims to solve the problem of poor detection effectiveness of an existing synchronous motor rotor state. Comprising the steps that a rotor three-dimensional digital twin model of the synchronous motor is constructed, and rotor state information and a defect sample database are bound in the rotor three-dimensional digital twin model; acquiring visual image data and / or temperature data of the rotor acquired by a visual imaging device; and when a comparison result of the visual image data and / or the temperature data and the three-dimensional digital twin model of the rotor is matched with defect features in the defect sample database, generating an abnormal state detection result of the rotor.

According to the driving main machine, the escalator and the moving sidewalk, the driving main machine comprises the synchronous motor assembly and the gear transmission assembly, the synchronous motor assembly and the gear transmission assembly are integrated, and the output end of a motor rotating shaft and the transmission input end of the gear transmission assembly are the same motor rotating shaft; variable-speed adjustment between the motor rotating shaft and the power output shaft is realized by using the gear transmission assembly; therefore, the transmission noise of the driving main machine can be reduced, the size of the whole machine is reduced, the structure of the driving main machine is more compact, and the effects of improving the transmission efficiency and reducing the cost are achieved.

The present disclosure provides an electric synchronous motor (1) for a power tool. The motor (1) includes a rotor (2) having at least one pair of circumferential polar alterations (7), a slotless stator yoke (6) of ferromagnetic material, and a stator (4) comprising three, or a multiple of three, concentrically wound coils (5) arranged in a non-overlapping manner inside the stator yoke (6). Each coil (5) has a phase cable (9) arranged to feed the coil with current and a y-point cable (8), with the y-point cables (8) connecting the coils (5) together in a y-point. The phase cable (9) and the y-point cable (8) of each coil (5) are arranged in axially opposite ends of the stator (4).

The invention relates to the technical field of photovoltaic glass processing, and discloses a tempering process of high-strength 2.0 mm coated photovoltaic glass, the process comprises cleaning treatment, coating treatment, curing treatment, tempering treatment and post-treatment, surface impurities and moisture are removed through the cleaning treatment, meanwhile, a nano-scale porous silicon dioxide coating layer is formed through the coating treatment, and the surface of the photovoltaic glass is subjected to the post-treatment. The film layer is preliminarily cured through curing treatment, so that the surface cleanness of the glass and the completeness of the coating layer are ensured, and a good foundation is provided for toughening treatment; through partition temperature control of heating treatment and cooperation of a quartz roller transmission system and driving of a variable-frequency synchronous motor and a servo motor, it is guaranteed that glass passes through all heating areas at a constant speed, the heating process is uniform and stable, meanwhile, a high-pressure air grid system is adopted for cooling treatment for quenching, air grid parameters are controlled, and cooling rate matching is guaranteed; and defects caused by uneven stress distribution are avoided.

The utility model provides a supporting mechanism of a synchronous motor, which relates to the technical field of supporting mechanisms of synchronous motors and comprises a motor body, an adjusting mechanism is arranged at the bottom of the motor body and comprises a fixing plate, the fixing plate is fixedly connected with the motor body, a mounting plate is arranged at the bottom of the fixing plate, and the mounting plate is fixedly connected with the motor body. A threaded rod is arranged at the top of the mounting plate and fixedly connected with the mounting plate, and the outer surface of the threaded rod is sleeved with a threaded pipe. According to the utility model, through the arrangement of the adjusting mechanism, the flexibility of the motor body during installation is higher, the motor body can be changed even if the installation height is not appropriate, so that the motor body can be smoothly connected with other components which are used in cooperation, and the threaded rod and the threaded pipe are arranged and are in threaded connection. Therefore, the threaded pipe can rotate and move under the cooperation of the threaded rod.

This invention discloses a load-triggered mobile platform directional wheel structure and its usage method, relating to the field of platform directional wheel technology. It includes an operating platform, a directional component that adapts to load conditions, and a load-bearing component. Each of the four corners of the operating platform is threaded with a lead screw, which is driven by a synchronous motor. A fence is provided on the upper surface of the operating platform, and a door is rotatably connected to one side of the fence via a pin. The bottom ends of the four lead screws are rotatably connected to a load-bearing platform. This invention achieves both flexible control during movement and rigid interlocking when parked by setting up the directional component; it enables platform movement by setting up a braking mechanism; and it provides a micro-directional function when the platform is unloaded and achieves load locking when the platform is loaded.

The application discloses a kind of pressurized suction cooling type air float centrifugal air compressor and working method, the system includes air inlet pipeline, centrifugal impeller, exhaust volute, permanent magnet synchronous motor main shaft and shell, air float thrust disc, air float radial bearing, pressurized impeller and its air inlet pipeline, stator core and winding, fixed structure, motor cold air outlet ring cavity, suction pipeline and suction ring cavity, the main stream area and cold gas flow area structure of air float centrifugal air compressor are proposed in the application, for the problem that high-speed synchronous motor generates large amount of heat, small heat dissipation space, easy to burn out, on the basis of the main stream area and cold gas flow area structure of air float centrifugal air compressor, the technical scheme for solving pressurized cold gas and outlet suction air combination is proposed, the cold gas flow rate and flow can be maximized to ensure that the heat generated by high-speed synchronous motor design operating condition long time operation is taken out in time, to ensure the operation safety of entire unit.

The utility model provides an engineering building scaffold convenient to feed, which belongs to the technical field of scaffolds and comprises a scaffold body, a mounting plate arranged on one side of the top of the scaffold body, a triangular fixing frame arranged on one side of the mounting plate, supporting frames arranged on two sides of the bottom of the triangular fixing frame, and guide rails arranged on two sides of the supporting frames. A moving block is slidably connected into the guide rail, a moving pulley is rotatably connected to the inner side of the moving block, an article placing frame is arranged at the bottom of the moving block, an upper traction wheel is rotatably connected to the top of the supporting frame, a synchronous motor is embedded in one side of the supporting frame, a winding shaft is fixedly connected to the output end of the synchronous motor, and a traction cable is arranged among the winding shaft, the moving pulley and the upper traction wheel. According to the engineering building scaffold convenient to feed, the traction force of the output end of the synchronous motor is reduced through the movable pulley of the movable pulley structure, the load of the output end is reduced, and therefore heavier objects can be pulled through smaller power.

The present application relates to the field of agricultural seeding technology, specifically is a kind of automatic seeding machine of multi-species corn mixed seeding, including the frame that is towed in field by tractor, frame is arranged with four seeders that each ridge variety is different at equal intervals in front and back, and the pushing mechanism that is pushed by active scraping to push away redundant seed is arranged on seeder, and the remedial mechanism that prevents planting position from missing sowing, the present application adopts guiding assembly to repeatedly slightly move adjustment seed clamping plate clamping seed posture, realizes stable seed taking and prevents seed from falling and missing sowing, cooperate photoelectric sensor monitoring, synchronous motor fast rotation wave wheel, fastly complete wave wheel interval replacement, to thereby remedy the missing sowing caused by seed clamping plate not successfully taking seed, in addition, scraper can push down the redundant seed on seed clamping plate by active contact mode, and then realize precision stable seed taking, active seed cleaning and missing sowing fast compensation of grain by grain seeding operation, ensure that field emergence rate overall uniformity.