628 results about "Torque controller" patented technology

A condition of impaired speed and torque control of a parallel electrically variable transmission due to factors beyond nominal modeling and estimation errors is diagnosed under low speed operation. The transmission includes at least one electric machine and a motor torque controller for regulating the transmission input speed and output torque. The motor torque controller includes an open-loop control path based on predetermined torques and accelerations and a closed loop control path based on input speed error. The presence of a larger than expected closed-loop correction magnitude, combined with low output speed and one or more other conditions is used to diagnose a condition of potential torque error, in which case the transmission control is altered to prevent unwanted operation.

A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.

A controller for an AC electric motor, includes a Feed Forward Torque Controller and a load model. The Torque controller directly derives a torque related component of applied motor voltages from a signal representing a torque command input T* and at least one motor parameter. The load model derives a motor speed value including a model of motor speed behaviour of the AC electric motor to provide an output signal which represents the motor speed of the AC electric motor. This motor speed output signal is used in determining a frequency of rotation of an applied motor voltage vector. Where an input to the load model is the signal representing the torque command input T*, the load model uses the signal representing the torque command T*, at least over a part of an operating speed range of the AC motor which includes zero speed, to determine the motor speed output signal.

The invention discloses an automatic regulating apparatus for controller parameters of a servo driver of a motor and a method thereof. The apparatus comprises an inertia identifier, a parameter initial regulator, a parameter checker, a parameter optimizer, a parameter saving and displaying device, a speed controller, a position controller, a torque controller, a PWM (Pulse-Width Modulation) generator and a coded disc. In the invention, the servo driver of an alternating current permanent magnet motor automatically configures the parameters of the position controller and the speed controller according to different rotary inertias of mechanic load, checks and further optimizes the automatically configured parameters through the parameter checker and the parameter optimizer so that the position response and the speed response of the servo driver are relatively optimal. The servo driver of the alternating current permanent magnet synchronous motor automatically regulates the control parameters according to work occasions and achieves ideal control effect. The whole process is manual participation free and completed fully by the servo motor of the alternating current permanent magnet synchronous motor.

An elbow-type power hand tool including a housing, a motor, a planet gear set, a transmission shaft, and a torque controller mounted in the housing for controlling output torque of the transmission shaft. The power hand tool including a battery pack mounted in the housing that provides electricity to a power drive, an output shaft coupled to the transmission shaft that extends perpendicular to the transmission shaft, and a chuck assembly coupled to an end of the output shaft remote from the transmission shaft for holding a tool bit.

Provided are a motor controller for suppressing a torque pulsation with a simple configuration and obtaining a sufficient output torque in the case of an open-type fault occurring in any one of windings of a motor and inverters, and an electric power steering device using the motor controller. In the motor controller for controlling a current supplied from and a voltage applied from a power source with respect to the motor including winding sets of a plurality of systems, when a fault determination unit (31) determines the occurrence of the open-type fault, the supply of the currents to the windings of one of the systems in which the fault has occurred is stopped by control performed on switching elements included in the inverter of the faulty system, whereas the supply of the currents to the windings of the normal system in which the fault has not occurred is continued.

A hand tool rotatable about an axis and having a handle and a bit in alignment along the axis. A plurality of inserts are available for individual placement between the handle and the bit for controlling torque transmitted by the tool. The insert can provide for limited or unlimited torque, in accord with the construction of the individual insert. The insert is replaceable relative to the tool.

The invention relates to a megawatt wind generating set combination control policy. When the wind speed of a wind generator fluctuates at rated wind speed, a torque control policy and feather control policy simultaneously remain in operation state, so as to realize undisturbed switching between a feather PID controller and a torque PID controller. The invention makes the best of the integral saturation characteristic of PID algorithm, so that switching between the torque PID controller and the feather PID controller is smooth and sensitive, mutual interference between the feather controller and the torque controller in the previous switch mode switching process while only one controller is ensured to operate at the same time, drastic fluctuation of wind generator power when the wind speedfluctuates at the rated wind speed is avoided, further load impact is reduced, electric energy quality is improved, reliability of the wind generating set is improved, and operation performance of the wind generating set is improved.

In a case where a computing period of a torque ripple compensation section which computes current compensation values Δid and Δiq to be caused to flow into a motor in order to prevent occurrence of a torque ripple in the motor differs from a control period of a current control section which controls a feedback to the motor in such a way that current command values i*d and i*q additionally provided with the current compensation values Δid and Δiq flow into the motor, the microcomputer sets the current compensation values Δid and Δiq to zero when a rotor angular velocity ωre of the motor is equal to or greater than a first threshold value ω₁.

The invention relates to an electronic speed differential control system of an electric wheel drive vehicle, which comprises a controller, a motor controller of each hub motor, a rotation angle sensor, an electronic accelerating pedal and a rotation speed sensor, wherein the rotation angle sensor is used for measuring the rotation angles of a steering wheel; the electronic accelerating pedal can output opening values; and the rotation speed sensor is used for measuring the actual rotation speed of the hub motor. The signal output ends of the electronic accelerating pedal, the rotation speed sensor and the rotation angle sensor are respectively connected with the signal input ends of the controllers. The controller is communicated and connected with the controller of each hub motor. Each controller comprises a first-stage following control module and a second-stage following control module. The invention can be used for reasonably controlling the electronic differential speed of each driving motor.

The present invention provides a method for controlling the output power of a permanent magnet electric motor (102) using a control means (106). The control means (106) includes a means (134) for measuring motor speed (134) and motor phase current (134), and a means for controlling motor phase current (110) to a desired level. A known relationship between motor phase current and motor torque is then employed by a torque controller so that motor shaft torque can be controlled. A power limiting means (128) then limits the output mechanical power of the motor by dividing a limit value of power by the motor speed to produce a maximum allowable torque setting for that speed.

The present invention discloses an electrical control method and a device for a multi-suspension-point crane. The control method comprises the following steps: a. preparation mode: a high and low voltage distribution system, a main driving system and a control system, etc can be detected to check whether fault is existed; b. steel wire rope pre-tensioning mode: each lifting motor adopts torque control and gives out torque given valve, and then a weighing sensor can check whether the steel wire rope is tightened; c. hovering mode: each lifting motor adopts speed control, the controller sets motor torque limiting valve, load hoist can be underwent and centroid position of loaded object can be calculated; d. joint lifting mode: each lifting motor adopts speed control, the torque limiting value of the motor is the same as that in hovering mode, and constantly monitoring and correction can ensure smooth lifting of hanging piece. The electrical control method improves control level of automatic operation and operation efficiency and reduces error of manual operation. The technology can be used for various cranes with the need of synchronous control and has broad application prospect.

The invention discloses a vehicle ABS test bed with changeable attachment coefficient and comprises a front and a back shaft frames, a front and a back fly wheel shafts, a transmission box and a telescopic transmission shaft; the front and the back shaft frames are respectively and symmetrically provided with a front left wheel, a front right wheel, a back left wheel and a back right wheel roller group and the front left wheel, the front right wheel, the back left wheel and the back right wheel roller group are totally uniform; each roller group is respectively connected with the output end of a torque controller through a transmission belt in correspondence and the input end of the torque controller is respectively and rigidly connected with the front and the back fly wheel shafts; the front and the back fly wheel shafts are connected with the telescopic transmission shaft through the transmission box to realize mutual synchronization; each fly wheel shaft is rigidly and symmetrically provided with two fly wheels with same turning inertia; the braking force of the wheel of the measured vehicle can be changed by controlling magnetizing current of the torque controller when the wheel is in lock braking and then the attachment coefficient of the road can be simulated. The invention can be widely applied in vehicle examination, ABS research and development, vehicle maintenance and service industry.

The invention provides an under-actuated unmanned surface vehicle self-adaptive trajectory tracking control device and method. The device comprises a reference path generator, a state sensor, a differential converter, a parameter estimator, a virtual controller and a longitudinal thrust and bow steering torque controller. According to the unmanned surface vehicle actual position and course angle collected by the state sensor (2) and the reference position and reference course angle information generated by the reference path generator (1), the new state variable is obtained through the differential converter (5), the new state variable and the speed and angle speed information collected by a sensor (4) are transmitted to the parameter estimator (8) and the longitudinal thrust and bow steering torque controller (12), a control instruction is obtained through calculation to drive an execution mechanism, and the longitudinal thrust and bow steering torque of an unmanned surface vehicle are adjusted. According to the device and method, the unmanned surface vehicle can reach the specific position within specific time at specific speed. Due to the under-actuated unmanned surface vehicle, energy consumption and manufacturing cost of a system can be lowered, and the weight of the system is reduced.

The invention discloses an adaptive terminal sliding-mode controller based mechanical arm trajectory tracking control method. The method includes the following steps: 1, establishing a rigid mechanical arm system dynamics model having n degrees of freedom rotating joints; 2, obtaining the measuring information of each joint angle q and angular velocity which is shown in the description of a mechanical arm through a photoelectric encoder, setting the expected angle q<d> and expected angular velocity which is shown in the description tracked by each joint, and calculating mechanical arm trajectory tracking errors [epsilon]1 = q - q<d> and the first derivative shown in the description of trajectory tracking error versus time; 3, establishing a novel non-singular terminal sliding-mode surface s according to the [epsilon]1 and [epsilon]2; and 4, designing the controlling moment tau of the driving motor of each joint of the mechanical arm according to the sliding-mode surface s, and establishing an adaptive rate which can adjust control gain to dynamically estimate system lumped disturbance upper bound. Under the circumstance that internal and external interference such as parameter perturbation and torque disturbance existing in the mechanical arm system, the method can perform real-time feedback so as to realize the accurate controlling of mechanical arm trajectory tracking based on the measuring information of each joint angle and angular velocity, and the controlling on the robustness of the whole course can be guaranteed.

A throttle position corresponding to a R-R torque representing a torque in which a reserve torque is added to a required torque at MBT is computed. The throttle position is offset by an amount of a reserve torque in a torque increasing direction. An ignition retard amount for obtaining the required torque is computed based on a ration between the required torque and the R-R torque to cancel an increment in torque due to the offset of the throttle position. Because the offset amount of the ignition timing in the retard direction can be computed without an estimated torque which is determined based on the intake air flow rate including the leak air, it is restricted that the ignition retard amount becomes too large even if the large amount of leak air is generated at the throttle valve.

A pair of direct d-q-axis voltage commands is associated with a monotonically varying test sequence of test rotor angular positions to determine a correct rotational direction of a rotor of the motor in response to application of the pair of direct d-q-axis voltage commands to the motor. The rotor of the motor rotates (e.g., self spins in a diagnostic mode) in response to the applied direct d-q-axis voltage commands and applied monotonically varying test sequence of test rotor angular positions. The primary positioning module or data processor determines that conductor connections between the inverter (e.g., motor controller) and the motor are correct if the calculated shaft speed sign is positive with respect to an applied monotonically varying test sequence of rotor angular positions that monotonically increases.

The invention discloses a torque management control method of a battery electric vehicle. Due to the fact that a vehicle control unit receives all status signals transmitted by a gear shifting mechanism, an accelerator pedal, a brake pedal, a motor controller and a battery controller, target demand torque of a vehicle is determined, a series of processing is performed on the target demand torque, the target demand torque subjected to the processing is output to the motor controller to control operation of a motor, and accordingly, the battery electric vehicle can meet all travel requirements.

The invention discloses a permanent-magnet synchronous motor torque control system and method based on sliding-mode observer and auto-disturbance rejection control, so that the torque of the permanent-magnet synchronous motor is controlled rapidly and precisely. A minimal-order extended flux-linkage sliding-mode observer is designed; an auto-disturbance rejection current controller is designed; difference processing is carried out on an electromagnetic torque outputted by an observer and a given torque signal outputted by an upper computer and the difference is inputted into a PI controller; a q-axis current signal outputted by the PI controller and dq-axis flux-linkage component outputted by the observer are inputted into the auto-disturbance rejection current controller to form a torque closed loop. According to the permanent-magnet synchronous motor torque control system and method, the dynamic response of the output torque of the motor is accelerated and no overshoot phenomenon is avoided. Moreover, on the basis of combination of the sliding-mode observer and the auto-disturbance rejection controller, the reliability and robustness of the torque control of the permanent-magnet synchronous motor are enhanced. The permanent-magnet synchronous motor torque control system and method are applied to occasions with the permanent-magnet synchronous motor as a driving system.

Disclosed herein is a method as well as a system for controlling an electric power steering system. The method includes: receiving a torque signal from a torque sensor responsive to a torque applied to a steering wheel; obtaining a motor velocity signal, the motor velocity signal indicative of a speed of an electric motor which applies torque to a steerable wheel; and generating a command for said electric motor with a controller coupled to the torque sensor, and the electric motor. The command includes torque control and motor velocity compensation, responsive to at least one of the torque signal, and a motor velocity signal. Also disclosed herein is a storage medium encoded with a computer program code for controlling an electric power steering system, the storage medium includes instructions for causing controller to implement the disclosed method. Further disclosed is a computer data signal for controlling an electric power steering system, the data signal comprising code configured to cause a controller to implement the disclosed method. Additionally, a method for optimizing controlling torque in an electric power steering system is disclosed. The method including: receiving a torque signal responsive to a torque applied to a steering wheel; obtaining a motor velocity; generating a command with a controller for the electric motor, where the command includes a torque control and motor velocity compensation, responsive to the torque signal, and the motor velocity. The performance of the torque control is responsive to a torque compensator, a high pass low pass structure, and motor velocity compensation.

The present invention provides a motor control device and an electric power steering device. Under any one phase generating the current-carrying failure, a micro computer 17 selects other two phases as electrifying phases except the phase generating the current-carrying failure, in order to generate phase current changing like a secant curve or a cosecant curve at making a predetermined rotational angle according to the phase generated the current-carrying failure as an asymptote at the generation of the current-carrying failure and continue an output of a motor control signal to execute a current control. In addition, the micro computer 17 comprises a rotational angle correcting section 40 correcting (offsetting) an input rotational angle (theta). Furthermore, when the two phases as electrifying phases of diphasic drive except the phase generating the current-carrying failure in order to compensating a phase offset between a phase current command value Ix* as a current command value and an actual phase current value Ix as an actual current value in the current control, and correct the rotational angle (theta) becoming the basis of the current control.