30 results about "Motor control" patented technology

The invention relates to a portable water quality sampler, which mainly comprises a water quality sampling probe, a telescopic pole, a sampling pipeline automatic winding and unwinding reel and a handheld terminal. The water quality sampling probe comprises a deep detection sensor and a sampling pump; the telescopic pole comprises a plurality of telescopic rods, a pulley block, a hook and a suspension seat; the sampling pipeline automatic winding and unwinding reel comprises a reeling disk, a winding motor, a counterweight, a cable, a sample conveying tube, a suspension balance frame and a reel bracket, and the handheld terminal comprises a LCD screen and keys. The whole system has the advantages of light quality, disassemble components and convenient carrying; the telescopic pole structure can be used to collect intermediate water samples in rivers, ditches and reservoir banks, the winding motor controls the reeling disk to adjust the putting-in depth of the probe for water quality sampling of different water depths, the deep detection sensor can be used for real-time detecting of the water depth of the probe so as to ensure the sampling pump can accurately acquire a surface layer, middle layer and bottom layer water sample, and the handheld terminal can be used for sampling horizon setting and sampling motor control.

The invention relates to an intelligent bread machine. The intelligent bread machine comprises a body, an upper cover, a bread bucket and a main controller, wherein bottom feet are arranged at the bottom of the body; a water pump, a temperature detection device, a heating device and a stirring device which are electrically connected with the main controller are arranged in the bread machine; the main controller comprises a motor control unit connected with the stirring device and a weight acquisition device arranged at one of the bottom feet of the body and used for acquiring a weight signal of the bread machine; the main controller is provided with a weight calculation unit electrically connected with the weight acquisition device, a water addition amount calculation unit electrically connected with the water pump as well as a fermentation calculation unit and a heating calculation unit which are electrically connected with the heating device; the weight calculation unit is used for receiving the weight signal from the weight acquisition device and calculating a weight difference before and after flour is added; and the water addition amount calculation unit, the fermentation calculation unit and the heating calculation unit are controlled to calculate the corresponding water addition amount, the fermentation time, the fermentation temperature, the heating time and the heating temperature according to the set programs by utilizing a signal of the weight difference.

A motor control unit includes a detected steering torque correction unit that corrects the detected steering torque that is detected by a torque sensor and then subjected to a limitation process by a steering torque limiter. When the absolute value of the detected steering torque is equal to or smaller than a predetermined value, the detected steering torque correction unit corrects the detected steering torque to 0. When the absolute value of the detected steering torque is larger than the predetermined value, the detected steering torque correction unit outputs the detected steering torque without correction. A PI control unit calculates the addition angle based on the deviation of the control torque obtained through correction by the detected steering torque correction unit from the command steering torque.

A motor control apparatus for synchronously controlling a master axis motor for driving a master axis and a slave axis motor for driving a slave axis, includes: a master axis position detector which outputs position data of the master axis and a reference signal with a predetermined fixed period; a master axis receiving circuit which receives the position data and the reference signal output from the master axis position detector; a master axis computation circuit which computes a master axis error representing a difference between the position data received by the master axis receiving circuit and the position data acquired at the time of the reception of the reference signal; and a slave axis motor control unit which controls the operation of the slave axis motor by using the master axis error as a command for synchronizing the operation of the master axis motor.

The invention discloses a variable-pitch hydraulic transmission wind turbine. The wind turbine comprises a wind energy acquirer and a variable pump coaxially connected; the variable pump is provided with a variable pump control unit; the variable pump communicates with a hydraulic energy storer, an oil supply system, a high-pressure pressure gauge, a high-pressure pressure sensor and a pilot electric-hydraulic proportional control valve through a one-way valve at the same time; the pilot electric-hydraulic proportional control valve is connected with a permanent magnet synchronous generator through a variable motor; the variable motor is provided with a variable motor control unit; the variable pump communicates with an inlet oil filter; the variable motor communicates with an outlet oil filter; the inlet oil filter communicates with a low-pressure pressure gauge, a low-pressure pressure sensor, an overflow valve and the outlet oil filter at the same time; the overflow valve also communicates with a hydraulic oil tank; and a one-way valve communicates between an outlet end of the one-way valve and an inlet end of the inlet oil filter. The invention further discloses a control method of the variable-pitch hydraulic transmission wind turbine. The device and the method are reliable in work.

An electric vehicle three-system integrated test platform belongs to the field of electric vehicles. The electric vehicle three-system integrated test platform is composed of a battery and battery management system, a motor and motor control system, and an industrial personal computer. The battery and battery management system comprises a battery cooling/heating system, a battery management system, and a battery pack. The motor and motor control system comprises a current sensor, a voltage sensor, a motor, a speed/torque sensor, an inertia disc, a dynamometer, a motor controller, and a tension controller. The battery cooling/heating system makes the batteries work within an optimal temperature range. Through the battery management system, the voltage and current of the battery can be monitored, and functions like battery equalization can be achieved. Through the motor and motor control system, the performance and properties of the motor under various conditions can be tested and analyzed. A finished vehicle control system simulates different driving conditions of an electric vehicle so as to test and optimize the regenerative braking control effect.

The invention discloses an omnidirectional single-spheroid self-balanced face recognition and tracking robot. The omnidirectional single-spheroid self-balanced face recognition and tracking robot comprises an attitude sensor system, a data handling system, a two-freedom-degree camera system, a servo motor control system, a movement control system and a touch display module, wherein the attitude sensor system is connected with the data handling system to send detected movement state data to the data handling system; the data handling system and the two-freedom-degree camera system are mutually connected to acquire and analyze image data of current environment; the touch display module and the data handling system are mutually connected; the data handling system and the servo motor control system are mutually connected; and the servo motor control system and the movement control system are mutually connected to jointly control the movement state of the system. The omnidirectional single-spheroid self-balanced face recognition and tracking robot disclosed by the invention has the advantages that the in-situ free steering and omnidirectional movement can be performed in a narrow space, so that the omnidirectional single-spheroid self-balanced face recognition and tracking robot can be widely used in crowded places including a hospital, a bazaar and the like, and the movement defects of inflexible movement manner including large turning radius, long consumed time and the like, and the abuses that an interaction manner is single and short of attraction, existing in a conventional movement manner, are overcome.

A traction control system for two and three wheeled motorcycles that prevents or limits the rear wheel(s) from slipping when the operator accelerates the vehicle. If the torque supplied by the motor exceeds the tractive force developed between the rear tire(s) and the road surface the rear tire(s) will slip creating a dangerous condition. The operator engages the system and selects the degree of desired traction control. The system detects rear (driven) and front (non-driven) wheel rotational speeds. If the rear wheel(s) begins rotating faster than the front wheel(s) the traction control computer will send a signal to the motor control unit to reduce the motor's power output. Additionally, as the operator applies the throttle the traction control computer sends a signal is sent to the rear suspension to stiffen for the purpose of more efficiently transmitting power to the rear wheel(s) and road surface.

The invention discloses a device for cleaning away riverway floating objects. The device comprises a body assembly, rotary wheel assemblies, a mincing and extruding assembly, a lifting assembly, a thumbing wheel assembly and fence assemblies. Rotary wheels rotate through current impact, thus, the lifting assembly and the thumbing wheel assembly are driven to work, the floating objects are fished to the lifting assembly through the thumbing wheel assembly to be fed into a mincing assembly to be minced, and then the floating objects are compacted by an extruding assembly to be stored in a material box. Fence motors control the opening angles of fences on the river surface, and the intercepting width of the floating objects is increased; and the rotary wheels work through the current impact,the riverway floating objects are collected and fished, energy is saved, environmental friendliness is achieved, the collected riverway floating objects are minced and compacted by the mincing and extruding assembly to be stored in the material box, in other words, recovery of the riverway floating objects is pre-treated, and the storage capacity of the storage box can be improved.

Setting of parameters that determine filter characteristics is facilitated. Machine learning of optimizing the coefficients of a filter provided in a motor control device that controls rotation of a motor for a machine tool, a robot, or an industrial machine is performed on the basis of measurement information of an external measuring instrument provided outside the motor control device and a control command input to the motor control device.

The invention discloses a general-purpose motion control device and control method for a rehabilitation robot. The control device comprises a master controller of the rehabilitation robot, a motor driving module, a position and speed detection module, a joint force information acquisition module, a contact force information acquisition module and a rehabilitation data analysis module, wherein themotor driving module, the position and speed detection module, the joint force information acquisition module and the contact force information acquisition module are all mounted on the rehabilitationrobot, and the motor driving module is connected with a plurality of joint driving motors for driving joints of the rehabilitation robot. The control device and control method have the beneficial effects that through the design of a modularized total showing structure, convenient expansion of components and functions of the rehabilitation robot is increased; and the control device can be suitablefor different structure forms of a single-freedom-degree structure form, a two-freedom-degree structure form, a three-freedom-degree structure form, a multi-freedom-degree structure form and the like, and has the functions of performing single-joint independent training of different positions of upper limbs, lower limbs, waists and the like, multi-joint synergistic training and the like.

The invention discloses a permanent magnet synchronous motor device directly driving a drill bit. A rotating shaft of a permanent magnet synchronous motor is a hollow shaft, an outer shell and the hollow shaft of the permanent magnet synchronous motor extend upwards, the permanent magnet synchronous motor and a downhole controller are sequentially arranged between the outer shell and the hollow shaft from bottom to top, a cable is connected with the permanent magnet synchronous motor through the downhole controller, and the upper end and the lower end of the hollow shaft are in sealing rotation connection with the outer shell. A protector arranged between the outer shell and the hollow shaft is arranged on the downhole controller, and the protector is a precipitation type or capsule type protector. Motor oil is arranged in the protector, the cable is connected with a motor control cabinet, and the motor control cabinet transmits a power source and control signals to the permanent magnet synchronous motor via the downhole controller through the cable. A stator slot of the permanent magnet synchronous motor is a straight slot. Due to the fact that the output end of the permanent magnet synchronous motor can be directly connected with the drill bit, the drill bit is directly driven to work below thousands of meters, and the phenomena of breaking, falling and the like of a drill column can be effectively avoided.

The invention discloses a composite sliding mode speed control method and system for a cylindrical permanent magnet linear synchronous motor, and belongs to the technical field of motor control. A terminal attractor is introduced on the basis of an exponential reaching law, and a new sliding mode reaching law is provided. Based on the reaching law, a sliding mode speed controller of the cylindrical permanent magnet linear synchronous motor is established, the convergence speed of the system state can be increased, and the chattering phenomenon can be effectively restrained. Meanwhile, an extended sliding mode disturbance observer is designed and used for estimating system lumped disturbance and providing feedforward compensation for a speed controller, and a composite sliding mode speed control strategy is formed. The cylindrical permanent magnet linear synchronous motor adopts a double-closed-loop control strategy of composite sliding mode speed control and current PI control based on a reaching law and an extended sliding mode disturbance observer. According to the method, the dynamic response speed of the system is increased, the anti-interference capability and robustness of the system are enhanced, and the operation performance and reliability of the motor in a complex working environment are improved.

The invention discloses an intelligent maintenance device for heavy oil and high wax-bearing oil wells. The intelligent maintenance device comprises a pumping unit and a pumping unit motor, the pumping unit motor is installed on the middle part of the pumping unit, one side of the pumping unit is fixedly provided with a pumping unit motor control box, one side of the pumping unit is fixedly provided with a pumping rod, the middle part of the pumping rod is fixedly provided with a pumping rod wireless load sensor, the lower side of the pumping rod is provided with an oil well, one side of the oil well is provided with an agentia pipeline transportation and mixing mechanism, and the inner part of the pumping unit motor control box is successively fixedly provided with a pumping unit wirelesscurrent sensor, and a pumping unit motor speed regulating drive module. According to the intelligent maintenance device for the heavy oil and the high wax-bearing oil wells, working conditions of theoil wells being maintained can be tracked in real time, automatic maintenance can be conducted in real time according to the working conditions of the oil wells, and the problems of high maintenancelabor intensity of manual dosing, low efficiency of agentia, high hot cleaning cost of a boiler car, and secondary pollution of formation, oil well pump blocked by wax, and short period of pump inspection are solved.

A pan-tilt control method, a control device (50) and a control system are disclosed, where a pan-tilt (1011) is arranged on a mobile platform, the pan-tilt control method comprising: acquiring rod quantity information for motion control of the pan-tilt (1011); acquiring a motion state reference coefficient of a pan-tilt (1011) corresponding to a current motion mode of the mobile platform, the current motion mode being selected from a plurality of motion modes through the detected motion mode selection operation, the plurality of motion modes corresponding to respective motion state reference coefficients of the pan-tilt (1011); determining a target motion state parameter of the pan-tilt (1011) according to the rod quantity information and a motion state reference coefficient of the pan-tilt (1011) corresponding to the current motion mode; and controlling the pan-tilt (1011) according to the target motion state parameter. According to the control method, the motion state of the cradle head (1011) can be automatically adjusted according to the motion mode of the mobile platform, so that the speed of the mobile platform in different motion modes is tightly matched with the speed of the cradle head (1011), and the shooting effect of the mobile platform is improved.

The invention relates to a control circuit which serves for security-critical control of a consumer with an inductive load portion, to be connected to a direct voltage source, and a method for failure control. It is in this case assumed that the control circuit has a power driving assembly, a free-wheeling assembly and a reverse-connection protected assembly. In order to increase the probability of failure recognition, this control circuit is extended by a method for failure control. For this purpose the semiconductor switches of the assemblies, each formed by a MOSFET, are individually driven. The different switching statuses are checked by a diagnostic device which processes voltage values to be read out at outputs of the control circuit. In this way failure-free functionality and also possible causes of failure in the control circuit can be diagnosed.

The invention discloses a three-stage synchronous motor rotor position estimation method based on a direct decoupling mode. A main exciter of a three-stage synchronous motor uses single-phase alternating current excitation with constant frequency, and a second harmonic wave generated by a rotating rectifier as a high-frequency signal is indirectly injected into an excitation winding of a main generator, a second-order generalized integrator is used for extracting a high-frequency response signal and an orthogonal signal thereof from current loop output controlled by starting of the main generator, high-frequency sine and cosine signals extracted from a stator side of a main exciter are combined, a decoupling signal synchronous with the high-frequency response signal is generated through analytical operation, a heterodyne method is combined for modulation, and a rotor position angle of the three-stage synchronous motor is estimated. According to the rotor position estimation method provided by the invention, the decoupling signal synchronous with the high-frequency response signal can be accurately generated, the calculation amount is small, implementation is easy, the complexity of a motor control algorithm can be effectively reduced, and the accuracy of the obtained position estimation angle is relatively high.

The invention particularly relates to a method for switching a vector mode and a scalar mode in high-power motor control, which solves problems that over-current occurs easily in existing high-power motor control, the service life is reduced, and that the reliability of the whole system is poor. The method is characterized comprising the steps that a, when a motor speeds up, the modulation degree is increased to a limitation threshold value M1, and the control mode transits from the vector mode to the scalar mode; b, when the motor speeds down, the modulation mode gets into 3-frequency-division modulation from a square wave mode, then the control mode transits from scalar control to vector control; c, the modulation mode is switched firstly, the modulation degree reduces to acquire the modulation degree M3 as soon as getting into 3-frequency-division, wherein the modulation degree M3=Mmax-Mdelta-Mhyster; and d, after the modulation mode gets into 3-frequency-division, lux linkage gradually decreases to a normal threshold value Phim2, the control mode is switched from scalar control to vector control. The method provided by the invention prolongs the service life of the motor, and shortens the test period at the same time.

The embodiment of the invention discloses a modulation and overmodulation method and device for SVPWM control, relates to the technical field of motor control, and mainly aims to simplify the implementation process of modulation and overmodulation in SVPWM control. The method comprises the steps of determining a projection u*[alpha] of an actual output voltage vector corresponding to a target voltage vector on a horizontal axis in a quadrature axis and determining a projection u*[beta] of the actual output voltage vector on a vertical axis in the quadrature axis according to a modulation region where the target voltage vector is located, wherein different modulation regions have different u*[alpha] and u*[beta] determination rules; and based on the u*[alpha] and the u*[beta], determining duty ratio output of a sector where the actual output voltage vector is located through a plurality of intermediate variables.

The invention provides a control device and a washing machine. The control device comprises a circuit board, a control panel, a frequency conversion chip and a driving module, wherein the control panel comprises a display control module arranged on the circuit board and a control switch connected with the display control module, and the display control module is used for sending an operation instruction to the frequency conversion chip according to the operation state of the control switch; the frequency conversion chip is arranged on the circuit board and is used for receiving and storing a motor control algorithm and a washing machine control program and generating a corresponding motor frequency conversion signal and a control instruction according to the operation instruction; and thedriving module is arranged on the circuit board and is used for driving a motor according to the motor frequency conversion signal. By applying the technical scheme provided by the invention, the motor frequency conversion signal and the control instruction are directly generated by the frequency conversion chip, so that the communication process of mutual interaction between a main control chip and the frequency conversion chip in the prior art is reduced, the control delay is reduced, the control efficiency is improved, the production cost is reduced, and the competitiveness of the product is finally improved.

The invention discloses an anti-rollover toy car with high balance. The toy car comprises a power assembly, a left outer wheel and a right outer wheel, a left outer wheel and a right outer wheel are installed at the left end and the right end of the power assembly correspondingly. The power assembly comprises a bottom plate and a panel; first bi-pass copper columns are arranged at the four cornersbetween the bottom plate and the panel. The bottom plate and the panel are installed and connected through the first bi-pass copper columns in cooperation with a bolt and a gasket, a rechargeable battery is arranged on the outer side of the bottom plate, a motor control module and a main control circuit board are installed on the outer side of the panel through a one-way bolt, and motor fixing blocks are installed at the left end and the right end of the inner side of the bottom plate through bolts and gasket in cooperation with nuts. The width of the whole wheel can be increased, the balanceperformance is good, toppling is avoided, when the left outer wheel and the right outer wheel rotate in the same direction, the toy moves forwards or backwards, and when the left outer wheel and theright outer wheel rotate in the opposite directions, the toy rotates leftwards or rightwards or rolls over, and the playability is high.

The embodiment of the invention discloses an electric vehicle control method and an electric vehicle controller. The method comprises the steps of 1, when a starting signal of a user is received, outputting a first starting driving signal comprising a forward driving signal and a reverse driving signal according to the starting signal, wherein the duty ratio of the first starting driving signal isthe same as that of the starting signal, and the direction of current applied to the motor by the reverse driving signal is opposite to that of current applied to the motor by the forward driving signal; sampling a first counter electromotive force of a motor suspension phase when the forward driving signal is applied to the motor, and sampling a second counter electromotive force of the motor suspension phase when the reverse driving signal is applied; and outputting a second starting driving signal according to the difference between the first counter electromotive force and the second counter electromotive force. The accurate commutation time is obtained according to the variation trend of the difference between the two counter electromotive forces, and a starting signal is applied tostably start the motor. The problem that the motor control is out of step when a driving signal is generated by using a zero-crossing detection method in the prior art is solved.

The invention discloses a power conversion circuit, comprising a rectifier module (1), an inductor (2), a capacitor (3), and an inverter circuit (4), wherein the inverter circuit (4) is connected withthe motor (6); the motor control module (12), the current control module (13) and the PWM modulation module (14)are connected in sequence; the voltage detection module (5) is disposed on the capacitor (3), and is connected to the motor control module (12); the first current sensor (81) is connected in series with the alternating current power source (9), and connected to the motor control module(12); and the motor control module (12) determines the improved q-axis torque current reference value Iq_Ref_g according to the alternating current iac and the bus voltage udc. The invention has thebeneficial effects that the change rules of the input current and the input voltage are the same by determining the q-axis torque current reference value Iq_Ref, that is, the power factor of the powerconversion circuit is improved.