131 results about "Constant torque" patented technology

The invention discloses a magnetic adjusting assembly, a motor, an electric drive system and a vehicle, and the magnetic adjusting assembly comprises a magnetic conductive part which is suitable for being movably disposed on one side of a rotor in the radial direction, so as to adjust the magnetic flux passing through the rotor. According to the magnetic adjusting assembly, the magnetic flux passing through the rotor is adjusted to change the magnetic flux of the magnetic flux short-circuit loop formed by the magnetic conductive piece and the rotor, so that the adjustment of the magnetic flux of the main magnetic field is realized, the adjustment is convenient, and the motor applying the magnetic adjusting assembly has the advantages of a constant torque area and a constant power area; and a constant-power operation region and a high-efficiency region are effectively widened while high torque density and power density are ensured.

The application provides a permanent magnet eddy current governor for constant torque load heavy load starting and a control method thereof, and belongs to the technical field of permanent magnet eddy current transmission speed regulation. The permanent magnet eddy current governor comprises a conductor cylinder, a magnet disc, a transmission shaft and a magnet disc axial traction mechanism. The conductor cylinder is connected with a motor input shaft, the inner wall of the conductor cylinder is fixed with two groups of annular conductor sleeves, the annular conductor sleeves are divided into starting zones and rated working zones in the axial direction, and the two groups of starting zones are separated by an idle zone. The transmission shaft passes through the rear end of the conductor cylinder, the front end is located in the conductor cylinder, and the rear end is connected with a load output shaft. The magnet disc is installed on the shaft rod of the transmission shaft located in the conductor cylinder, and the outer ring surface of the magnet disc is uniformly distributed with permanent magnets. The magnet disc axial traction mechanism is used for driving two magnet discs to synchronously approach or move away from the center of the idle zone. The application can be used for motor idle starting, heavy load controllable starting, load balancing, speed regulation operation and unloading overload protection of constant torque load.

The invention relates to the technical field of hydraulic control, and discloses a hydraulic motor constant torque self-adaptive PID (Proportion Integration Differentiation) control system which comprises a controller and a hydraulic driving unit, the controller performs frequency domain separation on the pressure signal by using a signal preprocessing module, and extracts an average pressure difference representing the driving force and a ripple amplitude representing the fluid rigidity; the state observation module estimates an instantaneous volume elastic modulus based on the ripple amplitude, corrects a compression item in a flow continuity model by using the elastic modulus, and calculates an instantaneous leakage coefficient of the motor in real time; the self-adaptive control module establishes dynamic mapping of PID gain and physical parameters, the proportional gain is adjusted by using a leakage coefficient to match system damping, the integral gain is adjusted by using a volume elastic modulus to adapt to inherent frequency, and a control instruction is synthesized by combining feedforward compensation. According to the method, the problem of model mismatch caused by oil characteristic change and motor abrasion is effectively solved, and the whole-life-cycle control precision of the system is improved.

The invention relates to the technical field of cable recycling, in particular to an electric wire and cable skin stripping device and a method thereof.The electric wire and cable skin stripping device comprises a sleeve base, a plurality of cutter assemblies arranged below the sleeve base, a clamping conveying mechanism below the sleeve base and a skin stripping mechanism, each cutter assembly comprises a blade and a pressure sensing module, and the cutting angle of each blade can be adjusted; the pressure sensing module detects the cut-in pressure of each blade in real time and feeds back and adjusts the cut-in angle of the blade; a speed difference control system is arranged between the clamping conveying mechanism and the skin stripping mechanism and comprises a constant torque driving unit of a front-section clamping roller and a differential driving unit of a rear-section shifting roller, and the two units monitor the rotating speed through an encoder and maintain the speed ratio of 1: 3. Through dynamic compensation and closed-loop pressure control and in combination with a differential stripping mechanism with the speed ratio of 1: 3, high-precision lossless stripping of the cable skin is achieved, the cutting-conveying-stripping integrated process is integrated, and the single-time stripping efficiency is improved.

The invention provides a seabed sand liquefaction test system, which relates to the technical field of underground or underwater structures and comprises a mounting platform, a buoyancy system, an excitation system, a probe rod and a penetration system. Wherein all the systems are installed on an installation platform, and the platform is connected with an overwater facility through a cable. The excitation system and the penetration system are stacked and connected through a floating connecting structure, and the probe rod sequentially penetrates through the excitation system and the penetration system; the penetration system is provided with a penetration power unit, a transmission mechanism, a symmetrical double-head rocker arm and a feeding wheel, the transmission mechanism is connected with a torque retainer in series, and a reversing mechanism is arranged and can drive the rocker arm to move in a mirror image mode, so that the feeding wheel clamps the feeler lever to achieve penetration or lifting. The floating connection isolates vibration and prevents resonance and data noise; the torque retainer realizes fixed-torque clamping and is simplified into a single-power unit, so that the cost is reduced, and faults are reduced; the rocker arm can release the probe rod, retention is achieved without auxiliary equipment, lifting, slipping and clamping stagnation are prevented, and the testing efficiency, reliability and data precision are improved.

The invention discloses a reciprocating type passenger ropeway constant deceleration control system, and relates to the technical field of brake control. According to the method, the first-stage constant deceleration braking mode and the second-stage constant torque braking mode are set, analysis is carried out through the second-stage braking conversion algorithm, the deceleration abnormal index, the speed tracking abnormal index and the response abnormal index are output, then the mode abnormal total value is obtained, the braking state is judged, self-adaptive mode switching is achieved, and the braking efficiency is improved. Constant braking deceleration is maintained, swinging of a hanging box is reduced, comfort of passengers is improved, brake rubber abrasion is reduced, meanwhile, regional debugging is not needed, and the operation difficulty of a construction site is reduced; hydraulic loop parameters are analyzed through a failure judgment logic algorithm set by the hydraulic redundancy protection module, a loop abnormal total value is output, and hydraulic loop switching is carried out based on the loop abnormal total value; and through visual display of the fault memory interaction module, the safety redundancy of the braking system is improved, fault tracing and maintenance are facilitated, and the running reliability of the cableway is guaranteed.

The invention relates to the technical field of servo loading, and discloses a rotating speed control method of a servo loading system, which comprises the following steps: constructing the servo loading system; the servo motor is driven to work at a constant torque; establishing a disturbance estimation model under servo loading disturbance; rotating speed data of the tested motor are obtained in real time, rotating speed errors are input into a speed PID controller, a basic control signal is generated, disturbance compensation and error response are fused, and a master control signal is constructed; pID parameters of a speed PID controller are optimized and adjusted on line through an improved fast exploration random tree algorithm; and fixing the speed PID parameter according to an error stability criterion, keeping the current control output, and readjusting the PID parameter when the disturbance trend changes. According to the invention, the rotating speed control precision and the operation stability of the servo loading system under complex disturbance conditions can be improved.

The adjustable constant-force clamping jaw comprises a torsion input shaft, a torsion output shaft, a constant-force output mechanism and a force adjusting mechanism, the torsion input shaft is in transmission connection with the output end of a first motor, and the torsion output shaft is rotationally connected to the end, away from the torsion output shaft, of an outer frame; the torsion input shaft and the torsion output shaft rotate coaxially, the two ends of the constant force output mechanism are connected with the torsion input shaft and the torsion output shaft correspondingly, the constant force output mechanism is used for flexibly connecting the torsion input shaft and the torsion output shaft and outputting constant torsion to the torsion output shaft, and the force adjusting mechanism is connected with the torsion input shaft. And the force adjusting mechanism is rotationally connected with the torsion output shaft, and the force adjusting mechanism is used for adjusting the torsion output to the torsion input shaft by the constant force output mechanism, and through the technical scheme, the problem that in the prior art, a constant force clamping jaw is difficult to clamp through set clamping force is solved.

A system and method for actively suppressing aircraft wheel brake vibrations determines whether the wheel speed has changed suddenly, thereby preventing landing gear yaw vibrations and cornering difficulties caused by asymmetric brake pressure due to sudden wheel speed changes. By segmenting the aircraft's low-speed taxiing speed and limiting brake pressure based on the speed of each segment, longitudinal vibrations at low speeds are avoided, reducing the probability of vibration at low speeds by 1E-4. During high-speed braking, a wheel deceleration rate control range is established based on the braking torque characteristics, and brake pressure is controlled to achieve constant torque control, avoiding brake vibrations caused by torque variations during high-speed braking due to anti-skid operation. Longitudinal and yaw acceleration sensors are added to the wheel brake system. Braking pressure is limited based on the yaw and longitudinal vibration frequency signals, ensuring that no brake-induced vibrations occur during the entire braking process.

The invention discloses a torque closed-loop aircraft brake control system which comprises the following steps: acquiring a target brake torque through a brake control unit, and receiving torque feedback data acquired by a torque sensor; based on the target braking torque, current magnitude is generated through a feedback control method according to torque feedback data; a stop valve is opened through the magnitude of current, corresponding brake pressure is generated through a brake servo valve, and the brake device is subjected to near-constant-torque brake state control according to the brake pressure; and the brake control unit receives wheel speed data acquired by the wheel speed sensor, judges according to the wheel speed data, and controls whether the brake servo valve outputs safety current or not to generate corresponding brake pressure according to a judgment result.

A carbon tape box drive structure is characterized by comprising a base, a winding motor, a transmission gear set, a winding shaft, a first connecting sleeve, a winding shaft, a second connecting sleeve, a constant torque mechanism and a damping mechanism, the constant torque mechanism is arranged on the winding shaft, and the carbon tape is always in a taut state; the damping mechanism is arranged on the winding shaft, and the winding shaft generates damping when rotating. The application discloses a thermal transfer printer. At the beginning and end of the rotation of the carbon tape, the constant torque mechanism and the damping mechanism cooperate to make the carbon tape supplied by the winding core always in a taut state, has a certain tension, and does not appear loose and collapsed, ensures that the printing points are more regular and uniform, and guarantees the printing quality.

An electrical connector system may include a first conductor including a first conductive material; a second conductor comprising a first conductive material; a fastener configured to couple the first conductor to the second conductor; and a constant torque material comprising a second electrically conductive material. A constant torque material may be disposed in electrical communication with the first conductor and the second conductor. The constant torque material may include carbon nanotubes disposed on a substrate.

This application relates to the field of robot motion control and safety protection, and discloses a method for preventing hand pinching in a robot servo system. This method monitors the motor status in real time. When suspected interference is detected, a composite detection signal consisting of a base holding voltage, a DC preload component, and an AC detection component is injected into the drive motor. Through open-loop feedforward control, the feedback current is collected and the same-frequency component is extracted. The phase lag difference relative to the injected signal is calculated. Based on the magnitude of the phase lag difference, the system identifies whether the obstructing object is made of rigid or flexible material, and then executes a graded protection strategy of constant torque limiting or variable stiffness impedance control, respectively. This invention utilizes the principle of motional impedance to establish a mapping relationship between electrical phase and mechanical impedance, solving the problem of difficulty in distinguishing contact materials under low-speed conditions, achieving active compliance and safe escape, and improving the safety of human-machine interaction.

The present application relates to a kind of permanent magnet shielding motor vector control energy efficiency optimization method considering magnetic field lagging phase angle, belong to permanent magnet shielding motor control field.It is characterized by: by analyzing shield sleeve eddy current effect, the analytical expression of magnetic field lagging phase angle is derived using electromagnetic field theory;The lagging phase angle is introduced into permanent magnet flux linkage term to be corrected, and the eddy current loss of shield sleeve and stator iron loss are combined into equivalent iron loss component, and a system controllable loss model is constructed;Under the constraint of constant torque, the analytical expression of total controllable loss about direct-axis current is derived and the optimal direct-axis current given value is solved.The actual application introduces angle compensation in the coordinate transformation link of vector control system, and the optimal direct-axis current given value is sent into current regulator, the accurate decoupling of dq axis current is realized, the total loss of motor is reduced, so as to improve the overall efficiency of motor control system.

The invention provides a hybrid excitation magnetic circuit structure, a motor with the structure and a control method of the motor. According to the hybrid excitation magnetic circuit structure, basic magnetic flux is provided through a permanent magnet rotor assembly, the magnetic flux is dynamically adjusted through an electro-magnetic winding assembly, and superposition enhancement or partial counteracting of a main air gap magnetic field can be achieved only by switching the direction of electro-magnetic current; the output torque of the motor is obviously enhanced; and second-direction current is conducted in a constant power area to counteract part of magnetic flux and expand the speed regulation range of the motor, so that various working condition requirements can be met, and wide-range efficient operation is realized.

The application discloses a new energy automobile short shaft performance test process and belongs to the technical field of automobile part detection. The process comprises the following steps: step one, sample clamping; step two, paint spraying and marking; step three, constant torque test: a driving mechanism and a driven mechanism control the relative constant torque of two clamps and synchronously rotate; step four, result comparison; step five, dynamic torque test; step six, simulation heating test; step seven, starting torque test; step eight, emergency stop torque test; step nine, fatigue torque test; and step ten, static torque test. The application can comprehensively evaluate the performance of the short shaft under actual working conditions by the different states and environments of the new energy automobile short shaft in the use process, such as temperature change, working load fluctuation and the like. The process is completed by adopting an integrated structure, the short shaft does not need to be turned over and clamped repeatedly in the detection process, and the errors caused by multiple clamping can be avoided.

The invention discloses a hydraulic dynamometer control system and method based on a servo adjusting valve, and belongs to the technical field of marine power device testing. The system comprises a dynamometer body, a servo adjusting water inlet valve, a drainage valve, a high-precision weighing device, a rotating speed monitoring device, an intelligent controller and a human-computer interaction interface. A servo motor with micron-order precision is adopted to drive a valve, and a double-closed-loop PID control algorithm and a self-adaptive adjusting technology are combined, so that accurate control over the load characteristics of the hydraulic dynamometer is achieved. The system supports three working modes of constant torque, constant rotating speed and propeller characteristics, and has the characteristics of high response speed, high control precision (torque fluctuation + / -0.15%), high automation degree and the like. The technical problems that a traditional hydraulic dynamometer is low in control precision and slow in response, depends on manual operation and the like are solved, the hydraulic dynamometer is particularly suitable for performance testing of a high-power marine diesel engine and a dual-fuel engine, and the testing efficiency and reliability are remarkably improved.

A method (100) for calibrating the offset angle (PhiO) of a field orientation regulator of a motor (210) between the angle signal (W) of a position sensor (220) and the direction of the rotor flux (RF), comprising the steps of: periodically changing (120) a current vector (Is) along a constant torque line; determining (130) a rotational speed signal (n_t) of the position sensor (220) of the motor (210); and calibrating (140) the offset angle (PhiO) based on the determined rotational speed signal (n_t).

The building energy-saving door and window structure comprises two first frames and two second frames, limiting grooves are formed in the inner walls of the front ends of the first frames, fixing rods are fixedly connected to the interiors of the limiting grooves, springs are arranged outside the fixing rods in a sleeved mode, sliding blocks are connected to the exteriors of the fixing rods in a sliding mode, and the sliding blocks are connected to the interiors of the first frames in a sliding mode. And the front end of the sliding block is fixedly connected with a mounting seat, the front end of the mounting seat is rotationally connected with a hydraulic cylinder, the driving end of the hydraulic cylinder is fixedly connected with a baffle, the rear side of the baffle is rotationally connected to the front end of one second frame, and a plurality of mounting assemblies are arranged on the inner side of the first frame. According to the mosquito net, buffering can be achieved when the installation base moves, meanwhile, the use angle of the baffle is convenient to adjust, the pull rope can be pulled to slide outside the first constant-torque rolling shaft and the second constant-torque rolling shaft, then the magnet can magnetically attract and fix the magnetic attraction rod, and mosquitoes are prevented from entering the mosquito net.

The invention discloses a permanent magnet auxiliary synchronous reluctance motor sensorless control method capable of effectively reducing high-frequency torque pulsation. Aiming at high-frequency torque ripple caused by a traditional high-frequency signal injection method, by changing the high-frequency signal injection direction, under MTPA control, a corresponding high-frequency response current vector is tangent to a constant torque curve, and the high-frequency torque ripple can be effectively reduced. In order to solve the problem of position estimation errors caused by cross coupling, the rotor position is estimated through a phase-locked loop after the d-axis inductance Ld, the q-axis inductance Lq and the dq-axis mutual inductance Ldq which are measured in an offline mode are combined to be processed, and the influence of the cross coupling effect on position estimation is eliminated.

The invention discloses a motor, an electric drive system and a vehicle, the motor comprises a rotor, the rotor comprises a rotor body and a magnetic conductive part, and the magnetic conductive part extends along the axial direction of the rotor body and extends out of the axial end part of the rotor body; and the magnetism adjusting assembly is used for changing the radial opposite area of the magnetism adjusting assembly and the magnetism conducting part. According to the motor provided by the invention, the magnetic conductive part extends along the axial direction of the rotor body and extends out of the axial end part of the rotor body, and the magnetic flux adjusting assembly and the rotor can form a magnetic flux short-circuit loop, so that the magnetic flux of the magnetic flux short-circuit loop can be changed by changing the radial opposite area of the magnetic flux adjusting assembly and the magnetic conductive part; therefore, the magnetic flux of the main magnetic field is adjusted, the magnetic flux is convenient to adjust, the use requirement of the motor can be met, the motor has the advantages of a constant torque area and a constant power area, and a constant power operation area and a high-efficiency area are effectively widened while high torque density and power density are ensured.

The invention relates to the technical field of aerial cableway scaling experiments, and discloses an aerial cableway scaling experiment device, which comprises two rolling assemblies arranged at an interval, a force measuring assembly, a tension cable and a constant force mechanism, and is characterized in that each rolling assembly comprises a fixed seat, a calibration table rotationally connected with the fixed seat, a driving piece connected with the fixed seat and the calibration table, and a bracket connected with the calibration table; the driving part is used for driving the calibration table to swing relative to the fixing seat; the force measuring assembly is connected with a bracket and / or a calibration table of a rolling assembly; one end of the tension cable is connected with the force measuring assembly, and the other end bypasses the bracket of the other rolling assembly; the constant force mechanism is connected with the other end of the tension cable and used for applying constant torque to the tension cable. The driving piece drives the calibration table and the support to swing, rolling of ships is simulated through swing of the calibration table and the support, and the coupling effect of rolling motion of the two ships can be accurately simulated.

The utility model relates to the technical field of steel pipe production and processing, in particular to an inclined continuous pipe rolling mill for penetrating a seamless steel pipe, which comprises a rack, three driving power mechanisms, three rollers and three transmission mechanisms, each transmission mechanism comprises a first transmission shaft connected with the roller, a first bevel gear arranged on the first transmission shaft, a second transmission shaft and a second bevel gear arranged on the second transmission shaft, the second transmission shaft is correspondingly in transmission connection with the driving power mechanism, and the second bevel gear is meshed with the first bevel gear. The three rollers are independently connected with the driving power mechanisms through the transmission mechanisms respectively, the rollers are independently driven through the three driving power mechanisms respectively, independent speed regulation and constant torque output of the rollers are achieved, each roller is independently controlled, power is transmitted through a bevel gear pair formed by a bevel gear II and a bevel gear I, large torque output is achieved, and the roller speed regulation and constant torque output are achieved. And the equipment is more suitable for complex rolling working conditions.

This invention discloses a roping-driven humanoid robot with centralized drive arrangement and its compliant control method, belonging to the field of humanoid robot technology. The robot includes: an upper limb torso with joint modules centrally arranged in a Y-shape; an upper limb system comprising a series-connected three-degree-of-freedom parallel attitude-adjusting roping-driven humanoid shoulder joint, upper arm, tension-amplified constant-torque constant-stiffness roping-driven humanoid elbow joint, forearm, rotation-decoupling differential roping-driven humanoid wrist joint, and hand; a pelvic-like structure including a 6-RUHU parallel lumbar joint; and a lower limb system comprising a series-connected hip joint, thigh, tension-amplified constant-stiffness roping-driven knee joint, lower leg, differential roping-driven ankle joint, and foot. This invention also discloses a forceless sensing compliant control method based on a motor current and dynamics model. This invention achieves centralized center of gravity, lightweight design, wide-range constant torque output, and safe and flexible interaction, making it suitable for service, collaboration, and other humanoid robot application scenarios.

The invention provides an open-winding permanent magnet synchronous motor fault diagnosis and fault-tolerant control method based on predictive control, and the method comprises the steps: improving an existing fault diagnosis strategy based on a current detection method, calculating a phase current difference value before and after a single-phase open-circuit fault of a motor, and setting a corresponding threshold value, thereby building a fault discrimination index, and achieving the fault diagnosis and fault-tolerant control of the open-winding permanent magnet synchronous motor. The fault diagnosis efficiency is effectively improved; on the basis, a three-phase current reference value after a fault is redesigned to maintain the constant torque output capability of the driving system, and dead-beat current prediction control is applied under an ABC coordinate system to determine the target phase voltage at the next moment; and finally, an appropriate voltage vector is selected in the degradation modulation diamond vector space of the double inverters to complete fault-tolerant control, so that the fault-tolerant operation capability and reliability of the motor driving system are effectively improved, and meanwhile, the calculation cost is greatly reduced.

This invention belongs to the field of lunar rover weight reduction and suspension technology, specifically a constant tension suspension mechanism for a lunar rover. It includes a mounting plate, a winch wheel mounting frame A, a balanced winch motor, winch wheel A, a winch wheel mounting frame B, a fine-tuning winch motor, winch wheel B, winch wheel C, wire rope A, wire rope B, a tension sensor, a spring, and wire rope C. This invention achieves weight reduction by continuously providing a preset constant torque through the balanced winch motor, effectively balancing 5 / 6 of the lunar rover's weight. The tension sensor monitors and obtains the spring deformation in real time, allowing the fine-tuning winch motor to make immediate compensations, further maintaining the spring deformation in dynamic equilibrium and ensuring constant tension in the suspension mechanism, enabling the lunar rover to move stably. The overall structure of this invention is relatively simple and highly reliable, effectively avoiding weight reduction failures and inconsistent suspension forces during lunar rover movement.

A fan motor for a heating, ventilation, and air conditioning (HVAC) system includes a housing and a motor connector integrated with the housing. The motor connector includes a first plurality of ports, a second plurality of ports, and a third plurality of ports. The fan motor is configured to operate in a constant torque mode via the first plurality of ports, and the fan motor is configured to operate in a constant air flow mode via the second plurality of ports instead of the first plurality of ports. The fan motor includes a motor controller configured to operate the fan motor in the constant torque mode in response to energization of at least one port of the first plurality of ports.

The five-phase permanent magnet synchronous motor open-circuit fault three times harmonic current injection fault-tolerant control strategy belongs to the motor field, and aims to solve the problem of torque fluctuation rising of the five-phase permanent magnet synchronous motor under winding open-circuit fault. The strategy includes the following aspects: adjusting the residual phase current to suppress the torque fluctuation rising caused by the winding open-circuit fault, and the residual phase current is determined according to the fault-tolerant control current; the obtaining process of the residual phase winding fault-tolerant control current is as follows: the relationship between the output torque and the residual phase winding fault-tolerant control current of the motor under the fault-tolerant state of the winding open-circuit fault is established according to the no-load back electromotive force, and then the relationship between the constant torque component of the output torque, the second torque fluctuation amplitude and the fourth torque fluctuation amplitude and the residual phase winding fault-tolerant control current is established; the multi-objective particle swarm algorithm is used for solving to obtain the fault-tolerant control current under the condition of maximizing the constant torque component and minimizing the sum of the second and fourth torque fluctuation amplitudes.

A retractable display device is provided and includes: a shaft housing; a plate housing assembled with the shaft housing; a mandrel module disposed in the shaft housing; a flexible roller blind wound on the mandrel module; a plurality of main support rods disposed in the plate housing; a plurality of left connecting rod groups respectively arranged between any two of the main support rods; a flexible screen wound on the mandrel module; a first constant torque spring constantly providing a first elastic force and disposed on the mandrel module; and a second constant torque spring constantly providing a second elastic force and disposed on the mandrel module.

A method for starting a motorcycle engine is performed through an engine starting control system including a controller, a power supply apparatus coupled to the controller, and an integrated starter and generator coupled to the controller, the power supply apparatus, and the motorcycle engine. The method includes driving the integrated starter and generator to perform reverse operation at a reverse operation constant torque value within a reverse operation time until the reverse operation time ends; controlling the power supply apparatus to output a forward operation constant current to the integrated starter and generator after the integrated starter and generator stops the reverse operation, to perform forward operation; and starting the motorcycle engine through the integrated starter and generator when a forward operation angular velocity value is greater than or equal to an expected value. The method starts the motorcycle engine effectively. Furthermore, a corresponding system is also provided.