40results about How to "Mature control technology" patented technology

A switch control circuit, application and control method , the converter control circuit includes a signal generator, mode selection circuit, a step-down mode control circuit and a step-up mode control circuit, the signal generator is used for generating a reference signal required by the step-up mode control circuit and the step-down mode control circuit, A mode selection circuit generates a modeselection control signal according to the output voltage, A boost mode control circuit and a buck mode control circuit simultaneously receive a mode selection control signal, and compares them with their internal reference signals, and then select the operation mode required for the step-up and step-down converter, the present invention is applied to step-up and step-down converters in any period, The converter operates in only one mode, which means that only two power transistors have switching operation, which improves the efficiency of mode switching, and the mode switching is smoother when the input voltage and the output voltage are comparatively close to each other, and the boost mode control circuit and the buck mode control circuit alternately work.

The invention discloses a serial-parallel laser process machine and relates to the technical field of laser process machines, and the serial-parallel laser process machine is composed of a serial-parallel machine tool (1), a laser system (2) and a control system (3), wherein, the serial-parallel machine tool (1) comprises a machine tool body (4), a horizontal guide rail (5), a TDOF (three degrees of freedom) parallel mechanism (6) and a worktable (9), the TDOF parallel mechanism (6) comprises three driving slide blocks (11), a fixed platform (10), a hook joint (13), three linear guide rails (15), a moving platform (14) and three connecting rods (12). The serial-parallel laser process machine provided by the invention combines the characteristics of larger operation range of the serial mechanism and high kinematic accuracy of the parallel mechanism; and in addition, the flexible connection of optical transmission is combined, thus the novel serial-parallel laser process machine is suitable for cutting and welding a workpiece, and has the advantages of lager operation range, high kinematic accuracy and good processed flexibility.

The invention provides a method for preparing high-purity graphene. The method comprises the following steps: (1) respectively grinding and screening graphite to obtain graphite powder having an average grain diameter of 210-480mu m; (2) weighing the graphite powder and an oxalic acid solution in a weight ratio of 1:1.5-1:5 to prepare a carboxylated graphene turbid solution; (3) putting the carboxylated graphene turbid solution in an ultrasonic device for ultrasonic oscillation to obtain a carboxylated graphene suspension; (4) adding a zinc salt solution into the carboxylated graphene suspension, and stirring to obtain a mixed solution of zinc salt and carboxylated graphene; filtering the mixed solution, carrying out microwave heating and activating treatment on the filtered substances, cooling, pickling, washing, filtering and drying to obtain graphene. The method is low in material cost, simple in manufacture process and convenient for large-scale production, and the prepared graphene has a relatively high specific surface area.

The invention discloses elastomer performance testing equipment. The testing equipment is characterized by comprising an upper computer with an assessment parameter, a preloading control parameter anda testing control parameter, a master control module, a servo driving module, a servo electric cylinder, a testing tool and a collection module; and the testing tool comprises a testing table for placing a to-be-tested elastomer, and a testing execution mechanism movably arranged on the testing table and used for applying pressure on the to-be-tested elastomer. The invention further discloses a testing method using the testing equipment. The testing equipment has the advantages that the servo electric cylinder is used for driving the testing execution mechanism to test the to-be-tested elastomer, the equipment space is greatly reduced, the servo electric cylinder can greatly reduce the purchase cost, the equipment maintenance difficulty is reduced, and the control technology of the servoelectric cylinder is comparatively mature, thereby facilitating the user to perform technical support and upgrade; and the whole process is divided into a preloading process and a testing process, theinfluence on the testing by the stress of the to-be-tested elastomer can be effectively eliminated through preloading, and the testing result precision is improved.

The invention belongs to the technical field of an aviation power supply, and relates to a dual-active bridge-based starting power generation system. A 270V high-voltage direct current is used as a power supply mechanism of the starting power generation system, a starting power generator of the starting power generation system employs a high-speed permanent-magnet synchronous motor, and the starting and power generation functions can be achieved by a bidirectional running principle of the motor. A rare-earth permanent-magnet material employed by the permanent-magnet motor has high magnetic energy product, the weight of the motor can be obviously reduced, the volume of the motor is reduced, and meanwhile, the motor is long in service lifetime and high in reliability and maintenance. A high-speed permanent-magnet synchronous motor is mature in technology, digital control is employed, and output torque control of the motor can be achieved; and the starting power generation system has theadvantages of large capacity, high power generation efficiency, small size, light weight, high reliability, low life cycle cost and the like.

The invention relates to a grid-shaped rotor motor for a range extender of an electric automobile and belongs to the technical field of electric automobiles. The grid-shaped rotor motor is composed of a crankshaft, a shell, a stator iron core, an exciting winding and an armature winding, wherein ten rectangular holes are uniformly formed in the circumferential surface of the shell, and a grid-shaped iron core capable of conducting magnetism is arranged between any two rectangular holes; the stator iron core fixedly arranged on a range extender shell is composed of 12 substator iron cores uniformly distributed in a left inverted 'n' shape, stator poles projecting along the radial direction are arranged at the two sides of each substator iron core, and the side surface of each stator pole is in a sectional shape; the distance between two stator poles on one substator iron core is less than the axial length of each rectangular hole in the shell; the exciting winding is formed by winding yokes of all the 12 substator iron cores. The grid-shaped rotor motor provided by the invention can fully play the advantage of high power density of a disc type motor, and the exciting winding is short in path and small in copper loss.

The invention belongs to the technical field of building energy conservation, and particularly relates to a rotatable energy-saving window. The rotatable energy-saving window comprises a fixed windowframe, a movable window frame, a rotating motor, an automatic locking rod, an automatic telescopic bolt, an upper rotating shaft and a lower rotating shaft, the upper rotating shaft and the lower rotating shaft are fixed to the movable window frame, the fixed window frame and the movable window frame are connected through the upper rotating shaft and the lower rotating shaft, the rotating motor drives the upper rotating shaft and the movable window frame to rotate through gears, two parallel glass plates are fixedly installed on the movable window frame, a certain distance is reserved betweenthe glass plates to form a liquid flow cavity, and the liquid flow cavity communicates with an external pipeline through the hollow upper rotating shaft, the hollow lower rotating shaft and a rotatingconnector. Liquid exchanges heat through the liquid flow cavity between the glass plates, so that the effects of heat preservation and heat insulation is achieved; and the automatic locking rod and the automatic telescopic bolt are arranged so that the window can be locked and unlocked. The window has the functions of heat insulation and natural ventilation, solves the problem that a liquid injection type glass window cannot be opened and rotated, saves energy, protects the environment and is suitable for various buildings.

Disclosed is a discrete flexible die. An upper discrete die is connected with an upper sider of a press, a lower discrete die is combined with a base of the press and comprises a lower die support, a top supporting plate of the lower die support is assembled with hydraulic tensioning sleeves, oil supply of each hydraulic tensioning sleeves is realized through an oil pipe, a piezometer is mounted at the tail end of each row of the oil pipes, a punch is inserted into a middle round hole of each hydraulic tensioning sleeve, and an electric push rod is mounted below each punch; the upper discrete die comprises an upper die support, hydraulic tensioning sleeves are mounted on a middle supporting plate of the upper die support, oil supply of each hydraulic tensioning sleeve is realized through an oil pipe, and a piezometer is mounted at the tail end of each row of the oil pipes. Shape adjusting is realized by adopting the electric push rods controlled by a circuit, and the die punches are locked through the hydraulic tensioning sleeves after shape adjusting is completed; the punches is high in bearing capacity, thereby being capable of used for plate forming and part supporting; the whole discrete flexible die is simple in structure and low in manufacturing cost; two implementable schemes are provided for curved surface continuation after forming, and the discrete flexible die is high in efficiency, low in cost and free of environmental pollution.

The invention provides a method for preparing high-purity graphene. The method comprises the following steps: (1) respectively grinding and screening graphite and pimelic acid to obtain graphite powder having an average grain diameter of 210-480mu m and pimelic acid powder having an average grain diameter of 60-200mu m; (2) weighing the graphite powder and the pimelic acid powder in a weight ratio of 1:1-1:4 to prepare a carboxylated graphene turbid solution; (3) putting the carboxylated graphene turbid solution in an ultrasonic device to obtain a carboxylated graphene suspension; (4) adding a meta-aluminate solution into the carboxylated graphene suspension, and stirring to obtain a mixed solution of meta-aluminate and carboxylated graphene; filtering the mixed solution, carrying out microwave heating and activating treatment on the filtered substances, cooling, pickling, washing, filtering and drying to obtain graphene. The method is low in material cost, simple in manufacture process and convenient for large-scale production, and the prepared graphene has a relatively high specific surface area.

The invention discloses a chain type storage and transportation device with a fault tolerance function. The chain type storage and transportation device comprises a support, an upper guide rail, a lower guide rail, a main motor and a backup motor, one end of the main motor is connected with the upper guide rail through a first transmission device, and one end of the backup motor is connected with the upper guide rail through a third transmission device. A second transmission device and a fourth transmission device are arranged on the lower guide rail, a plurality of object supporting bins are arranged between the upper guide rail and the lower guide rail, and the multiple object supporting bins can be driven by the four transmission devices to circularly operate along the upper guide rail and the lower guide rail; and a first clutch can achieve power transmission from the main motor to the first transmission device and can isolate power transmission from the first transmission device to the main motor, and a second clutch can achieve power transmission from the backup motor to the third transmission device and can isolate power transmission from the third transmission device to the backup motor. A redundant backup power system comprises the main motor and the backup motor, and the reliability and fault tolerance of the storage and transportation device can be improved.

The invention discloses grouped-type wood sawing equipment applied to the forest industry. The grouped-type wood sawing equipment comprises an equipment main frame; a rear vertical plate is arranged on one side of the upper part of the equipment main frame; a group of electric saw oil cylinders are arranged at one side of the rear vertical plate and are matched with electric saws; a front vertical plate is arranged at the middle part of the equipment main frame; a group of push head oil cylinders are arranged at the rear side of the front vertical plate; the front side of the front vertical plate is connected with a group of push plates through one group of springs; the rear vertical plate is provided with a push plate speed reducing motor; the push plate speed reducing motor is connected with a wire reeling wheel key; an arranging frame is arranged at the front part of the equipment main frame; a side baffle speed reducing motor is also arranged at the front part of the equipment main frame and is connected with a driving belt wheel key; the front end of the arranging frame is matched with a side baffle through a rotating shaft; a driven belt wheel is arranged at one end of the rotating shaft. The grouped-type wood sawing equipment applied to the forest industry can be used for sawing a long wood material into a group of short wood materials by one-time sawing action, is high in work efficiency and is capable of satisfying the supply requirements of the next procedure.

The invention discloses a forced commutation four-leg silicon controlled rectifier PWM soft starter and a control method thereof, belongs to the technical field of AC-DC-AC frequency converters, and aims to solve the problem that an existing AC-DC-AC frequency converter starter has the problems of lower starting torque, more power switch devices and higher cost. The forced commutation four-leg silicon controlled rectifier PWM soft starter comprises a rectifier circuit, a filter circuit and an inverter circuit; the rectifier circuit and the inverter circuit are connected with a power source and a load respectively, the input end of the filter circuit is connected with the output end of the rectifier circuit; the output end of the filter circuit is connected with the input end of the inverter circuit and the W phase of the motor, and the output end of the inverter circuit is connected with the U phase and the V phase of the motor. A PWM signal is adopted to control the silicon controlled rectifier to carry out forced commutation, step voltage regulation and variable frequency speed regulation can be realized, the number of power switch devices is effectively reduced, the production cost is reduced, and the control performance of the soft starter is improved.

The invention discloses a low-rotational inertia servo motor, which belongs to the technical field of motors. The low-rotational inertia servo motor comprises a motor shell, an excitation stator ironcore, an armature stator iron core, a rotor iron core, an excitation winding, an armature winding and a shaft, and is characterized in that the disc-shaped rotor iron core is fixed on the shaft; the disc of the rotor iron core is provided with 4k uniformly-distributed fan-shaped through holes, and k is a positive integer; the two axial sides of the rotor iron core are provided with the excitationstator iron core and the armature stator iron core respectively; the excitation stator iron core is provided with 3k excitation stator poles protruding against one side of the rotor iron core, and theexcitation stator poles present a fan shape; and the armature stator iron core is provided with 3k armature stator poles protruding against one side of the rotor iron core, and the armature stator poles present a fan shape. The excitation winding and the armature winding in the technology are mutually isolated, the rotor iron core is only a disc with a large-area through hole, the rotational inertia is small, and the low-rotational inertia servo motor is facilitated.

The invention discloses a full-automatic soup pouring machine. A single bowl automatic separation device, a turned bowl automatic detection removal device and a soup automatic pouring device are arranged in one line; the automatic separation device of a single bowl is vertical to the automatic separation device of single bowl piles; two sides of the removal device are respectively provided with abaffle; the front baffle and another roller of the outlet of a single bowl belt conveyer are provided with a gap; the position of the rear baffle corresponding to the gap is provided with an engaged plate, the width of the engaged plate is equal to half width of the belt conveyer; a pair of photoelectric probes are respectively arranged at the gap; a rotatable pulling plate is arranged in the middle of the gap; a water tank is arranged just above the belt conveyer of the turned bowl; a pouring head is arranged under the water tank; the pouring head is close to the outlet end of the belt conveyer of the turned bowl; the end of the pouring head is provided with a sensor. The full-automatic soup pouring machine has simple structure, low cost and automation degree, which can realize automaticseparation of bowls one by one, automatically carries out the pouring and output of the soup, lightens the labour intensity of workers, and is safer and sanitary.

The invention discloses a sine wave power supply double-freedom-degree spiral motor with position self-locking function, comprising a rotor iron core, an armature winding, a rotor non-magnetic conduction base, a rotor magnetic iron core and a rotating shaft. A plurality of boss units are arranged on the inner wall of the stator iron core, and each group of boss units comprises bosses uniformly distributed along the axial direction of the inner wall of the stator iron core. An armature winding is arranged on the boss, and each armature winding is connected with a switch, and the movable sub-magnetic core is located on the non-magnetic-conducting base of the rotor. The rotor is located on the non-magnetic conduction base of the rotor, and the rotor is not connected with the magnetic base, and the rotor magnetic core and the rotating shaft jointly form a rotor. The sine wave power supply double-freedom-degree spiral motor with the position self-locking function is provided, and the characteristics of the axial magnetic field synchronous reluctance motor and the switch reluctance motor are ingeniously combined, and the rotor magnetic core is formed by pressing a silicon steel sheet axis, so that both the rotary motion magnetic circuit and the linear motion magnetic circuit in the rotor iron core do not have magnetic barriers, motor output force and efficiency are high.

The invention discloses an elastic body performance testing device, which is characterized in that it includes a host computer equipped with evaluation parameters, preload control parameters and test control parameters, a main control module, a servo drive module, a servo electric cylinder, a test tool and an acquisition module, The test fixture includes a test bench for placing the elastic body to be tested and a test actuator for applying pressure to the elastic body to be tested, which is moved and set on the test bench, and also discloses a test method using the test equipment; the advantage is that it adopts a servo motor The cylinder drives the test actuator to test the elastic body to be tested, which greatly reduces the equipment space. The servo electric cylinder can greatly reduce the purchase cost and reduce the difficulty of equipment maintenance. The control technology of the servo electric cylinder is relatively mature, which is convenient for users. Provide technical support and upgrade; the overall process is divided into preloading process and testing process. Preloading can effectively eliminate the influence of the stress of the elastic body to be tested on the test and improve the accuracy of the test results.

An electric vehicle magnetic grid type permanent magnetism doubly salient motor belongs to the electric vehicle motor technology field, comprises a shaft, a front armature iron core, a front armature winding, a front rotor iron core, a front permanent magnet, a permanent magnet iron core, a back permanent magnet, a back rotor iron core, a back armature winding, a back armature iron core and a shell, and is characterized in that the disc-shaped front rotor iron core and back rotor iron core are fixed on the shaft at intervals, the permanent magnet iron core fixed on the shell is between the front rotor iron core and the back rotor iron core, and the permanent magnets are fixed on the two surfaces of the permanent magnet iron core towards the rotor iron cores respectively and uniformly; the front armature iron core and the back armature iron core which are fixed on the shell are at the two sides of the front rotor iron core and the back rotor iron core respectively, armature poles are arranged on the armature iron cores, and the armature windings are wound on the armature poles. The rotor iron cores of the technical scheme of the present invention are magnetic grid-shaped, and are large in contact area and specific power, so that the electric vehicle magnetic grid type permanent magnetism doubly salient motor is very suitable for being used as an electric vehicle motor having higher requirements for the power density.

The invention provides a method for preparing high-purity graphene. The method comprises the following steps: (1) respectively grinding and screening graphite to obtain graphite powder having an average grain diameter of 210-480mu m; (2) weighing the graphite powder and an oxalic acid solution in a weight ratio of 1:1.5-1:5 to prepare a carboxylated graphene turbid solution; (3) putting the carboxylated graphene turbid solution in an ultrasonic device for ultrasonic oscillation to obtain a carboxylated graphene suspension; (4) adding a zinc salt solution into the carboxylated graphene suspension, and stirring to obtain a mixed solution of zinc salt and carboxylated graphene; filtering the mixed solution, carrying out microwave heating and activating treatment on the filtered substances, cooling, pickling, washing, filtering and drying to obtain graphene. The method is low in material cost, simple in manufacture process and convenient for large-scale production, and the prepared graphene has a relatively high specific surface area.

The invention relates to a grid-shaped rotor motor for a range extender of an electric automobile and belongs to the technical field of electric automobiles. The grid-shaped rotor motor is composed of a crankshaft, a shell, a stator iron core, an exciting winding and an armature winding, wherein ten rectangular holes are uniformly formed in the circumferential surface of the shell, and a grid-shaped iron core capable of conducting magnetism is arranged between any two rectangular holes; the stator iron core fixedly arranged on a range extender shell is composed of 12 substator iron cores uniformly distributed in a left inverted 'n' shape, stator poles projecting along the radial direction are arranged at the two sides of each substator iron core, and the side surface of each stator pole is in a sectional shape; the distance between two stator poles on one substator iron core is less than the axial length of each rectangular hole in the shell; the exciting winding is formed by winding yokes of all the 12 substator iron cores. The grid-shaped rotor motor provided by the invention can fully play the advantage of high power density of a disc type motor, and the exciting winding is short in path and small in copper loss.