3455 results about "Motor drive" patented technology

An electric power assisted steering assembly comprises a steering mechanism which operatively connects a steering wheel to the roadwheels of a vehicle, a torque sensing means adapted to produce a first output signal indicative of the torque carried by a portion of the steering mechanism, a means for producing a second output signal indicative from a signal indicative of the angular velocity of the portion of the steering mechanism, an electric motor operatively connected to the steering mechanism, a signal processing unit adapted to receive the two output signals and to produce therefrom an overall torque demand signal representative of a torque to be applied to the steering mechanism by the motor, and a motor drive stage adapted to provide a drive current to the motor responsive to the torque demand signal. The overall torque demand signal includes a damping component that is dependent upon the second output signal. The means for producing the yaw damping component includes a filter having one pole and one zero, and in use the second signal is passed through the filter to produce the damping component, the frequency of the pole and zero being selected such that the filter provides a band between the pole and zero within which the phase of the filtered second signal and the velocity signal are further out of phase or in phase than within the band.

The invention relates to a remote-control system of a stratospheric airship and a control method thereof. The control system is divided to four levels: a decision-making level for executing the selection and switch of a remote-control flight mode according to the actual working state data, and sending a corresponding mode command; a planning level for dynamically planning and generating an airship motor drive command according to the mode command sent by the decision-making level; an executing level for realizing the drive control to an airship motor according to the motor drive command of the planning level; and a perceiving level for finishing the real-time monitoring and data collection of the airship working state, and providing the original data of the airship working state to the decision-making level. The four-level control system architecture design of the control system is capable of simplifying the control device, improving the control efficiency, and fundamentally solving the problems of the function, efficiency and reliability of the near space airship ground and airborne control system.

According to the real-time clamping force zero point confirmation method, device and equipment and the readable storage medium, in a preset triggering scene, a motor of an EMB actuator is controlled to rotate in the forward clamping direction, motor rotation angle and torque parameters are synchronously collected in real time, and a motor rotation angle-torque curve is generated; according to the characteristic difference of the torque along with the change of the rotation angle before and after contact, selecting a preset calibration torque point on the rotation angle-torque curve, constructing a tangent line through the point, and positioning an intersection point of the tangent line and a motor rotation angle coordinate axis, the intersection point corresponding to a motor rotation angle reference in a contact critical state of a friction block and a brake disc; and the current zero point of the clamping force is obtained after the reference rotation angle is superposed with the comprehensive compensation amount. Accurate capture of a contact critical position is realized through real-time detection of motor rotation angle and torque and curve characteristic analysis, dynamic drift factors are adapted in combination with comprehensive compensation quantity, and zero point real-time updating can be automatically completed in the whole life cycle of the whole vehicle without depending on a fixed calibration value.

The invention relates to the field of co-extrusion production control, and particularly discloses an efficient film bag feeding control system, which is applied to a multi-raw-material synchronous conveying device of a co-extrusion process, and comprises a full-link data acquisition module, a full-link data processing module and a full-link data processing module, the raw material characteristic parameters comprise a melting point T, a stacking density rho and a magnetic sensitive particle loading amount M; the instantaneous load pressure P of each raw material conveying channel, the temperature Tm of a co-extrusion die head melting area, the real-time thickness H of a co-extrusion film layer, stock bin liquid level data and motor rotating speed data are collected and integrated to obtain a full-link original data set; the single-drive linkage conveying mechanism comprises a main servo motor, a plurality of sets of electromagnetic clutches and a plurality of sets of spiral conveying assemblies, and the main servo motor drives a transmission shaft through a synchronous belt. According to the technical scheme, for the co-extrusion process, the multi-raw-material synchronous conveying precision can be matched, and the problems that parameter adjustment lags behind, adaptability is poor and a downstream process feedback closed loop is lacked are solved.

The invention provides an efficiency optimization control method of a permanent magnet synchronous motor and related equipment. The method comprises the following steps: acquiring an output current of an inverter; constructing an inverter loss model based on the output current of the inverter and the inverter loss coefficient; constructing a total loss model based on the electromagnetic loss model, the inverter loss model and an equivalent conversion method; constructing a current population by taking the plurality of d-axis current values as individuals; and performing optimization solution based on the total loss model, the current population, a PID search algorithm and an artemisinin optimization algorithm to obtain a global optimal solution and control the permanent magnet synchronous motor. According to the scheme, the driver loss is added into the total loss model, and efficiency optimization can be carried out on the whole motor driving system; in order to solve the problem that a traditional method is not suitable for an IPMSM, a PID search algorithm and an artemisinin optimization algorithm are combined, parameter search is carried out on a motor efficiency optimal point by simulating an incremental PID controller adjusting mechanism, a global optimal solution is obtained, and therefore optimal control over the click efficiency is achieved.

The invention relates to the technical field of fan monitoring, in particular to a BMC (Baseboard Management Controller)-based fan state monitoring method and system. Demand level and energy efficiency modeling; matching coupling judgment is abnormal; carrying out abnormal mechanism cross positioning; performing combined construction of trend portraits; and outputting classification abnormity prompts. According to the invention, on the basis of a collaborative acquisition and hierarchical coupling analysis mechanism of BMC multi-source operation parameters, parameters such as a complete machine load rate, power supply input power, a fan rotating speed, a PWM duty ratio, a motor driving current, an air inlet and exhaust speed and a key heating device temperature are brought into a unified energy efficiency response relation set for modeling and analysis; the sensitivity, the accuracy and the interpretability of abnormal recognition are greatly improved, and the problems that due to the fact that only a single temperature parameter and fault triggering type control are relied on, fan performance degradation is recognized in time, the precision is low, and the response speed is low are effectively solved.

The invention discloses a deep desulfurization device and process based on an adjustable flat sheet membrane and intelligent cooperative control, the deep desulfurization device comprises a desulfurization tower and an intelligent adjustment and control system, a variable-configuration flat sheet absorption membrane device is arranged in the desulfurization tower body, and the variable-configuration flat sheet absorption membrane device is formed by arranging a plurality of groups of hydrophilic corrosion-resistant flat sheets in parallel; a plurality of blades with adjustable angles are uniformly distributed on one side or two sides of the flat plate, and can simultaneously drive the blades to synchronously and accurately rotate under the control of a motor driven by an intelligent control driver, so that the device can actively adjust the geometrical morphology and fluid mechanics conditions of a gas channel according to real-time working conditions; meanwhile, by means of the design of an absorbent circulation loop in the tower, the flow of the absorbent entering the desulfurization tower is dynamically adjusted, and therefore rapid response to working condition fluctuation and online optimization of the desulfurization process are achieved.

The invention relates to the technical field of battery defect detection, and discloses a new energy automobile battery surface deformation defect detection device and method based on visual inspection, and the device comprises a battery body, the bottom end of the battery body is symmetrically provided with conveying belt assemblies, and the bottom ends of the conveying belt assemblies are fixedly connected with a supporting frame; the two sides of the supporting frame are fixedly connected with guide rails, the two sides of the guide rails are symmetrically distributed and slidably connected with sliding blocks, the outer sides of the sliding blocks are fixedly connected with detection assemblies used for shooting and detecting a battery body, and the detection assemblies are electrically connected with a control cabinet. The battery is conveyed to the detection position through the conveying belt, the light sources on the two sides are lightened to irradiate multiple faces of the battery, the two side detection assemblies are crossed and overlapped for shooting, and the defect verification accuracy is improved. The transverse plate is connected with the detection assembly, the sliding block overturns along with the battery along the guide rail, and equipment cost is reduced. After detection, the stepping motor drives the sucker mechanism to turn over the battery, so that the bottom end faces upwards, and the detection assembly performs supplementary shooting to complete comprehensive detection.

An output node of a high-side driver circuit 220 is connected to a gate of a high-side transistor MH. The high-side driver circuit 220 is operable in a first mode in which the high-side driver circuit 220 outputs a drive current IHG_ON of a first current amount in a first period after a high-side control signal HGCTL transitioned from off-level to on-level, and outputs, in a second period following the first period, a drive current of a second current amount less than the first current amount.

The invention discloses a self-adaptive apple maturity lossless picking flexible claw and a picking method. The device comprises a base assembly, and a visual recognition module, a flexible clamping jaw assembly, a distributed pressure sensing module, a transmission execution module and a control unit are integrated on the base assembly. And the visual module adopts a depth camera and a YOLO11n model, judges the maturity grade in real time based on the apple red area proportion and is matched with the corresponding grabbing threshold force. The pressure sensing module is a thin film pressure sensor, and multi-point pressure feedback is achieved through a plurality of pressure detection points. The transmission module adopts a single motor to drive a lead screw nut lifting table, opening and closing of clamping jaws are synchronously controlled, the structure is light and simple, and cost is low. The picking method follows the process of recognition, matching, force control and picking, a cutter is not needed, lossless and high-success-rate self-adaptive picking is achieved, the problem of damage or failure caused by traditional fixed force control is effectively solved, the method is suitable for dense orchards, and the intelligent and lossless levels of apple picking are improved. The control unit is low in response delay and small in overshoot, and it is ensured that the grabbing force is accurately matched with the fruit state.

The utility model discloses a detachable multilayer foam embossment splicing device, which relates to the technical field of foam embossment splicing and comprises a fixed bottom plate, a threaded rod is arranged at the top end of the fixed bottom plate, and a movable block is in threaded connection with the outer side of the threaded rod; a placing plate is arranged above the movable block, and an adjusting mechanism used for clamping the foam embossment is arranged in the placing plate. According to the detachable multi-layer foam embossment splicing device, a motor drives a threaded rod to rotate, and the threaded rod is in threaded connection with a movable block during rotation, so that the movable block can drive a placement plate to move, and foam embossments clamped in the placement plate can be close to each other and are conveniently butted; and then glue special for foam is used for coating the foam embossments, subsequent splicing is facilitated, meanwhile, the splicing accuracy is improved, and the situation of position deviation is effectively avoided.

The controllable floating electromagnetic capturing mechanism comprises an electromagnet, a separating device, a connecting rod floating device, a non-contact switch device, a lead screw, a lead screw nut, a guide rod, a linear bearing, a guide rod fixing block, a large gear, a small gear, a motor, an upper shell, a middle shell, a lower shell and a visual camera. The connecting rod floating device comprises a base, an outer connecting rod, an inner connecting rod, a ball rod, an adaptive block, an adaptive rod, a pre-tightening sliding block, a pre-tightening spring, a floating spring and a control sliding block; the separating device comprises a retaining spring, a separating sleeve, a separating shell, a separating plug, a separating rod and a separating spring; the separating device comprises a retaining spring, a separating sleeve, a separating shell, a separating plug, a separating rod and a separating spring; the motor drives the lead screw to rotate through the small gear and the large gear, the control sliding block of the connecting rod floating device is controlled to ascend and descend, and the floating and locking states of the electromagnet are changed.

The invention discloses a roller module capable of electrically adjusting hand feeling and paragraph feeling, which comprises a base and a roller mounted on the base, the roller is of a hollow annular structure and is provided with an inner ring wall, a support and a motor are further arranged on a base body, a sliding cavity is formed in the part, extending into the roller, of the support, a friction block capable of sliding along the sliding cavity is arranged in the sliding cavity, and the friction block is connected with the motor. The output end of the motor drives the friction block to abut against or move away from the inner ring wall through the transmission assembly so as to provide different rolling hand feelings. The friction block is driven by the motor to controllably abut against the inner wall of the roller, so that the damping hand feeling of the roller is adjusted; and meanwhile, in combination with cooperative control of the angle sensor and the motor torque, diversified roller shifting section feelings can be accurately simulated. According to the application, adaptive scene switching can be realized through programmed control, and highly personalized and intelligent interaction experience is provided for the user.

The utility model discloses an automatic waste discharge device for optical explosion-proof membrane processing and die cutting, which comprises an unwinding component, a guide structure, a winding structure and a conveying belt, and is characterized in that the guide structure is arranged, and a coiled material is limited by a tension roller and a guide roller, so that the tension is uniform; by arranging a winding structure, a motor drives a reciprocating structure to reciprocate through a first belt pulley set, and meanwhile, the motor can drive a winding roller to intermittently move through meshing of a first ratchet wheel and a second ratchet wheel, so that the winding effect is improved, and the winding efficiency is improved. And the winding roller drives the conveying belt to synchronously operate through the second belt wheel set, the continuous automatic die cutting effect is achieved, and by arranging a guide plate, cut materials can be conveniently guided to the conveying belt, and therefore the cut materials are conveyed to the outside.

The invention relates to the field of display screens, discloses a self-adaptive adjusting support for an outdoor display screen, and aims to solve the technical problems that an existing outdoor display screen is single in display form, insufficient in immersion experience, high in energy consumption and low in intelligence. The display screen comprises an immersive film watching room, the core of the immersive film watching room is a film watching room outer frame, an annular film watching space is formed by a plane display screen and a curved surface display screen in the frame, elastic bent rods are arranged on the upper side wall and the lower side wall outside the frame, and flexible permanent magnet rods on the elastic bent rods are correspondingly and magnetically attracted with inner permanent magnet blocks on straight rods of the curved surface display screen; a telescopic motor drives an elastic bent rod to deform through a fixed rod transmission chain, drives a curved display screen to synchronously adjust the curvature through magnetic attraction linkage, and is matched with a side telescopic door to realize film watching space adaptation; a magnetic sensitive detection layer and a partition driving circuit are integrated on the flat panel display screen, and an invalid display area is dynamically closed to save energy; according to the device, an'advertisement mode 'and an'immersion mode' are automatically switched through infrared induction and a main controller.

The invention relates to the technical field of waste gas treatment, and discloses a waste gas treatment device for paper product production, which comprises a box body, a fan arranged at an air outlet of the box body, a discharge tower fixedly mounted at an air outlet of the fan, and filter cotton arranged at an air inlet in the box body and used for filtering particle impurities in waste gas, according to the waste gas treatment device, the motor is used for driving the rotating disc to rotate and driving the square block and the bearing frame to slide along the concentric-square-shaped groove, so that the positions of the two carbon containing frames close to the air outlet and the positions of the two carbon containing frames close to the air inlet are exchanged, and activated carbon with high saturation at the air outlet is exchanged to the air inlet; the activated carbon with low saturation at the air inlet is changed to the air outlet, so that the utilization rate of the activated carbon is improved, the activated carbon of the same batch can be conveniently changed together, meanwhile, the positions of the two upper carbon containing frames and the two lower carbon containing frames are exchanged, waste gas enters from the other side of the activated carbon, and the filtering effect and the purification efficiency of the activated carbon are improved.

The invention provides a data-driven multi-target control method, device and system based on model prediction, is applied to a three-phase three-level neutral point clamped converter, and aims to realize dual accurate control of switching frequency and neutral point voltage. According to the method, a switch weight factor and a neutral point voltage weight factor are used as inputs, and an average switch frequency in a fixed sliding window time and a neutral point voltage maximum value in another fixed sliding window time are used as outputs; and constructing an equivalent dynamic linearization data model under each dynamic working point of the closed-loop system by adopting a tight-format dynamic linearization method. Based on the data model, a data driving controller is elaborately designed to realize accurate regulation and control of the switching frequency and the maximum value of the neutral point voltage. The method has a high practical value and a wide application prospect in typical application scenes of power electronics and power transmission, such as grid connection and motor driving.

The utility model relates to the technical field of mechanical keyboards, in particular to a mechanical keyboard key function testing device which comprises a base, longitudinal electric sliding rails are arranged at the top of the base and close to the left side and the right side, sliding blocks of the two longitudinal electric sliding rails are jointly connected with a transverse electric sliding rail, and a sliding block of the transverse electric sliding rail is fixedly connected with a placing plate. An L-shaped support is arranged in the middle of the rear edge of the top of the base, a first threaded rod is in threaded connection with the position, close to the front side, of the top of the L-shaped support, and a click testing assembly is connected to the bottom end of the first threaded rod. According to the mechanical keyboard key function testing device, the motor is adopted to drive the cam to carry out key testing, the mode that an air cylinder drives a movable rod to stretch out and draw back at high frequency in the prior art is avoided, direct friction between moving parts is effectively reduced through the structural design driven by the motor, abrasion is greatly reduced, and therefore the service life of the device is prolonged; the problem that the service life of equipment is shortened due to air cylinder abrasion in the background technology is solved.

The utility model relates to an optical lens storage structure which comprises a storage bin, a fixed bottom plate, a reinforcing plate and a driving assembly. A plurality of layers of supporting plates are sequentially arranged in the storage bin from top to bottom, a plurality of positioning strips are arranged on the supporting plates, the supporting plates are divided into a feeding area and a discharging area by the positioning strips, and material trays can be placed on the feeding area and the discharging area; the driving assembly comprises a lead screw and a motor, the two ends of the lead screw are fixedly connected with the storage bin and the reinforcing plate respectively, a lead screw nut is installed on the lead screw and fixedly connected with a rotating seat, the rotating seat is connected with a lead screw base through a bearing, the lead screw freely penetrates through the rotating seat and the lead screw base, and the lead screw base is fixedly installed on a fixed bottom plate. The motor drives the lead screw nut to rotate, so that the storage bin gets close to or away from the fixed bottom plate; according to the utility model, the manual labor intensity is reduced, and the automation degree is high.

The invention belongs to the technical field of motor driving control, and discloses a space vector modulation strategy method for a permanent magnet synchronous motor, which comprises the following steps of: searching a region division and vector arrangement table by using regions in which Vlp and V are positioned to obtain an optimal vector sequence, and arranging vectors based on a principle of eliminating a peak of a CMV and minimizing switching operation times; and finally, calculating the duty ratio of a plurality of effective voltage vectors used for synthesizing the next period according to the amplitude-second balance principle. Compared with a control strategy that only one effective vector or two adjacent effective vectors are used in each control period, the virtual vector synthesized by the method is the same as the reference vector, and common-mode voltage spikes can be eliminated by the method; compared with NSPWM and AZPWM, the method has the advantages that area division and vector sorting are reasonably arranged, so that the switching action times are minimized, the switching loss is reduced, and the inverter efficiency is improved.

The utility model provides a video monitoring device based on voiceprint recognition, which relates to the technical field of voiceprint video monitoring and comprises a fixing plate, a rotating device is arranged at the bottom of the fixing plate, four connecting columns are equidistantly mounted at the bottom of the fixing plate in a surrounding manner, a fixing disc is mounted at the bottoms of the four connecting columns, and the rotating device is arranged on the fixing plate. A fixing hole is formed in the center of the bottom of the fixing disc, a connecting disc is installed at the bottom of the rotating device, and an angle adjusting device is installed in the middle of the bottom of the connecting disc. According to the utility model, the fixing plate is fixed through the plurality of bolts, the first forward and reverse motor and the second forward and reverse motor are electrically connected with the external control terminal, a control program, the camera and the voiceprint sensor are preset, and the external controller judges the voiceprint transmission direction according to the voiceprint sensor so as to start the first forward and reverse motor. The first forward and reverse motor drives the transmission gear to rotate while driving the rotating shaft to rotate, and the rotation of the transmission gear drives the extension plate and the rotating shaft to rotate.

The invention relates to the technical field of motor driving control, and discloses a motor driving method with low delay response. The method comprises the steps of collecting real-time operation parameters such as motor speed data, position data and current data, determining a low-delay control model based on the parameters, generating a dynamic adjustment instruction by using the model and applying the dynamic adjustment instruction to a motor driving system, and executing feedback calibration operation according to motor response data so as to update the model. Parameters are collected in real time, and an adaptive control model is constructed, so that a control instruction can be changed along with the running state of the motor, and the lag of an intermediate link is reduced; the dynamic adjustment instruction directly acts on the driving system, and the response speed is increased; the feedback calibration criterion compensates performance drift through continuously optimizing the model, and ensures that the motor keeps stable dynamic performance under different working conditions. The method can enhance the response capability of the motor in the scenes of load sudden change, speed switching and the like, improve the synchronism of multi-motor cooperation, reduce mechanical wear, and is suitable for various motor types and application scenes.

The invention discloses a method for inhibiting fluttering of a thin-wall workpiece based on a follow-up supporting device, which comprises the following steps of: installing the follow-up supporting device, establishing initial normal contact between a rolling wheel in the follow-up supporting device and the back surface of the thin-wall workpiece and applying pre-tightening force to finish initial calibration of a contact state between the follow-up supporting device and the thin-wall workpiece; based on the contact state, a force sensor and a displacement sensor in the rolling wheel are used for collecting normal contact force and displacement signals; the control unit calculates a modal participation coefficient and a dynamic correction function according to the real-time signal to form a time-varying model of equivalent stiffness and damping of the thin-wall part, and a stepping motor in the follow-up supporting device drives a gear-rack mechanism to finely adjust the position of a rolling wheel, so that self-adaptive adjustment of the supporting force is realized; data recording and feedback optimization; and finishing processing and outputting parameters. The device has the advantages of real-time sensing, self-adaptive adjustment, measurable parameters, compact structure and the like, and the machining precision and the surface quality of the thin-walled workpiece are remarkably improved.

The utility model discloses an industrial internet large screen structure, and relates to the technical field of industrial internet equipment. The device comprises a bottom plate, the top of the bottom plate is fixedly connected with a supporting column, the top of the supporting column is fixedly connected with a rotating mechanism, the top of the rotating mechanism is fixedly connected with a mounting frame, the rear end of the top of the mounting frame is provided with an adjusting assembly, and one side of the adjusting assembly is fixedly connected with a display screen. The direction of the display screen can be adjusted through the rotating mechanism, after the motor is started, the output end of the motor drives the first gear to rotate, and the first gear is tightly meshed with the fluted disc fixed in the inner cavity of the rotating sleeve, so that the rotating sleeve is driven to stably rotate around the supporting column, and the mounting frame and the display screen are driven to rotate at multiple angles; by means of the design, the large screen can easily meet different watching requirements in a complex industrial environment, and the screen can be rapidly rotated to the optimal display direction in different operation areas of a large production workshop.

The utility model relates to the technical field of integrating spheres, in particular to an adjustable optical integrating sphere which comprises an opening and closing assembly, front and back translation screw rod sliding tables are symmetrically mounted at the top of the opening and closing assembly, lifting assemblies are mounted at the tops of the front and back translation screw rod sliding tables, an integrating sphere is arranged between the two lifting assemblies, and a supporting assembly is mounted at the bottom of the opening and closing assembly. The lifting assembly comprises a lifting frame, a lifting lead screw is vertically installed on the inner side of the lifting frame, a lifting sliding block is installed on the lifting lead screw, the integrating sphere is composed of two hemispheres, and the two hemispheres are fixedly connected with the lifting sliding block on the outer side. According to the adjustable optical integrating sphere, through the design of the lifting assembly, the height of the integrating sphere can be flexibly adjusted according to actual requirements. The lifting motor drives the lifting lead screw to rotate and drives the lifting sliding block to move up and down. The design greatly improves the adaptability of the integrating sphere in different measurement scenes. The arrangement of the front-back translation lead screw sliding table enables the integrating sphere to move front and back in the horizontal direction.

The utility model belongs to the technical field of computer heat dissipation equipment, and provides a water cooling head which comprises a pump body, and the pump body is provided with at least two water inlet connectors and a water outlet connector. The pump body comprises a motor, an impeller, a partition plate, a confluence plate, a sealing plug and a heat absorption plate. The sealing plug is installed on any water inlet connector. The partition plate divides the pump body into an upper cavity and a lower cavity, the two water inlet connectors are communicated with the lower cavity, the water outlet connector is communicated with the upper cavity, and the partition plate is provided with a flow guide hole. The motor drives the impeller in the upper cavity to operate; the confluence plate is arranged in the lower cavity, the confluence plate is provided with a collecting pipe and a flow guide groove in the periphery of the collecting pipe, and the flow guide groove is communicated with the flow guide holes in the partition plate; two ends of the collecting pipe are respectively communicated with the two water inlet joints, and the collecting pipe is provided with a liquid outlet; and the heat absorbing plate is provided with a radiating fin row and a flow guide gap in the radiating fin row. The utility model further provides a water-cooling heat dissipation system with the water-cooling head. The problem that noise easily exists in a water-cooling heat dissipation system in the prior art is solved.

The invention provides an inner hole boring automatic centering method and device based on laser ranging. A positioning tool is adopted for carrying out the following steps that a sliding rail is driven to enable a main shaft to move a laser displacement sensor to the left end of a workpiece; the laser displacement sensor emits light beams to measure the workpiece inner hole distance and the distance between a light-emitting point and the spindle axis, and an original distance value is obtained; calibrating a coordinate system direction and establishing a measurement coordinate system; the servo motor drives the main shaft to rotate layer by layer, and synchronously records ranging data of the laser displacement sensor; processing distance measurement data and position coordinates based on a geometric algorithm and a triangulation principle, calculating coordinates of a measurement point, and fitting the circle center and radius of the section of the inner hole of the workpiece by adopting a section least square fitting algorithm in combination with the minimum boring cutting amount; performing a space cylinder least square fitting algorithm on the fitted circle center of each section to obtain the axis of a virtual inner hole cylinder; and calculating the position deviation value of the axial lead of the boring rod and the axial lead of the fitting cylinder, and driving the main shaft to move through motion interpolation to realize automatic centering adjustment.

The invention discloses an inverter circuit topological structure for driving double three-phase motors, and belongs to the technical field of power generation, power transformation or power distribution. The topology comprises a six-phase bridge arm, a switching tube in the bridge arm is connected in series with a diode, and a branch after the switching tube is connected in series with the diode is inversely connected in parallel with a diode. A plurality of switching tubes and diodes of the topology are connected according to a specific rule, a reverse current path is blocked by serially connecting the diodes, and current mutation in the switching process is reduced; and meanwhile, an anti-parallel diode is used for maintaining a continuous current path, normal work of the circuit is ensured, and the circuit has the advantages of simple circuit design, low control cost, high efficiency and the like, and is widely applicable to low-voltage and high-current dual-three-phase motor driving scenes.

The utility model discloses a double-motor sub-control type electric shutter driving mechanism, which belongs to the technical field of electric shutters and comprises a turnover motor, a lifting motor, a turnover shaft, a lifting shaft, a double-shaft seat and a mechanical-electrical interlocking limiting device, the turnover shaft and the lifting shaft are arranged in parallel, and the double-shaft seat is fixed in a top frame of a shutter body through an L-shaped mounting seat. The turning wheel and the lifting winding reel are in key connection respectively, so that an independent transmission path of the lifting rope and the turning rope is realized; the limiting device comprises a rectangular frame, an overturning / lifting threaded shaft barrel penetrating through the rectangular frame, a control block in threaded sleeving connection and a guide groove type limiting switch set, and a corresponding limiting switch is triggered through sliding of an overturning protruding block and a lifting protruding block along a guide groove, so that a motor driving signal is directly cut off. Through the double-motor time-sharing control logic and the thread pair linkage limiting design, rope abrasion and unexpected displacement caused by action coupling are thoroughly eliminated, the positioning precision reaches + / -0.05 mm, meanwhile, the standby energy consumption is reduced by 62%, and the device is suitable for high-rise buildings and intelligent home scenes.

The utility model discloses a heating membrane laminating device. Comprising a machine frame, a belt conveyor installed on the machine frame, a pair of U-shaped supporting plates fixed to the machine frame, a pair of sliding blocks arranged in the middles of the two U-shaped supporting plates in a sliding mode respectively, a pair of air cylinders driving the two sliding blocks to slide respectively, a hot pressing roller with the two ends penetrating through the two sliding blocks in a rotating mode respectively, and a first motor driving the hot pressing roller to rotate. The two ends of the tensioning roller are rotationally connected with the two U-shaped supporting plates correspondingly, one end of the unwinding roller is rotationally connected with one U-shaped supporting plate, the rectangular supporting plates are fixed to the fixed rack, the two ends of the rotating shafts penetrate through the two rectangular supporting plates in a rotating mode correspondingly, the second motor drives one rotating shaft to rotate, and the two pairs of belt wheels are arranged on the two rotating shafts in a sleeving mode correspondingly. The two pairs of belt wheels are sleeved with the two belts respectively, and the dust collection assembly is arranged at the tops of the two rectangular supporting plates. The heating film laminating machine has the advantages of being capable of automatically cleaning the surface of the heating film and safely laminating the heating film and the packaging film.