303 results about "Torque regulation" patented technology

A method and apparatus for controllable distribution of power from a turbine of a gas turbine engine between two rotatable loads of the gas turbine engine, comprises transferring a shaft power of the turbine to the respective rotatable loads using differential gearing operatively coupled with the turbine and the rotatable loads, respectively; and controlling the power transfer using machines operatively coupled with the respective rotatable loads, operable as a generator or a motor for selectively taking power from one of the rotatable loads to drive the other of the rotatable loads, or the reverse.

A method and apparatus for optimizing the torque applied to the primary and assist drive systems of an all-electric vehicle is provided, the torque adjustments taking into account wheel slip as well as other vehicular operating conditions.

A screwing-tool with a device to adjust transmitted torque consists of a handle to introduce a torque to the device, which is borne in the hollow of the handle and a driver-shaft as outpout element of the torque. On the driver-shaft inside the handle two separate couplings are assembled, between them a compression spring exerting a spring force onto the two couplings. Each coupling consist of a first and second socket engaging each other by gearings at their opposing faces. The maximum torque at which the torque-transmission will be interrupted cab be adjusted in that way, that by an adjustment-element the distance between the couplings can be changed resulting in a change of the tension of the spring exerting a load on the couplings. The teeth of the gearings slide and the sockets rotate relatively to each other and interrupt the torque-transmission if a pre-adjusted torque is exceeded.

This invention is intended to ensure that a control device for a vehicle drive unit is capable of realizing desired torque by making the main-actuator and sub-actuator collaborate adequately while holding the interposition of the sub-actuator as low as possible. For this end, a future target of torque that is going to be output from the engine and a realization timing of the future target are taken as reservation information for reserving engine torque regulation. Next, the required period, which is required to realize the future target when a main-actuator (a throttle) is operated to regulate the torque, is computed from a current engine operating condition. Then, the operation of the main-actuator is started at the timing preceding the realization timing by the required period for realizing the future target. In parallel with that, a sub-actuator (an ignition system) is operated to cancel out a torque change induced by the operation of the main-actuator during the period from the start timing of the operation of the main-actuator to the realization timing.

A power tool transmission is described in which an overload clutch mechanism is arranged to provide a relatively compact power tool. A torque adjustment dial is arranged between the visible portions of the motor housing and the gearbox, and the dial is coupled to a compression spring such that rotation of the dial cause the spring to be compressed or decompressed, thereby adjusting the torque at which the clutch overloads and ratchets. The compression spring is arranged at least partially between the motor and gearbox or gear train, in a space which conventional power tools do not utilised for this purpose. Thus, the dimensions of the power tool's transmission can be reduced with respect to conventional power tools. Furthermore, the space on the gearbox immediately behind a chuck can be used for another purpose other than accommodating the adjustment collar, as is the case with conventional power tools.

The embodiment of the invention discloses a processing method and device of a motor under a locked-rotor state, and belongs to the field of driving and control of an electric vehicle. A torque input to a vector controller is regulated to a target torque when that the motor is in the locked-rotor state is determined according to a current rotational speed and a command torque, the target torque is in a way that torque change quantity is superposed on the basis of the command torque, the torque change quantity is a torque oscillating in a preset period and changing in a positive-negative alternative way, the target torque is send to the vector controller, a three-phase pulse width modulation (PWM) duty ratio is obtained by calculation of the vector controller according to the target torque and then is sent to a power component, and the power component controls the motor to rotate. According to the method disclosed by the embodiment of the invention, the target torque is in a way that the torque change quantity is superposed on the basis of the command torque, the torque change quantity is the torque oscillating in the preset period and changing in the positive-negative alternative way, so that a rotational angle of a motor rotor changes periodically, a current peak of a single phase of the power component can be correspondingly reduced, and the motor can be prevented from being damaged when in the locked-rotor state due to excessive high temperature rising.

In a medical equipment (1), tubular insertion device (10A) and tubular insertion device having the medical equipment (1), the medical equipment (1) has a main body (2) regulated to rotate around an axis of the tubular insertion device (10A) and having a cylindrical body (3) provided in contact with the main body (2) to rotate integrally with the main body (2). A torque regulation mechanism (4) is provided to release the integral rotation in unison with the main body (2) so as to block a torque transmission to the tubular insertion device (10A) when a torque applied to the cylindrical body (3) is more than a predetermined value. The block of the transmission renders it incapable to further rotate the tubular insertion device (10A), whereby preventing a torsional buckling from being induced on the insertion device (10A), and enabling the operator to quickly perceive an excessive torque.

The invention discloses a rotational speed synchronous control method of a multi-switch reluctance motor. The rotational speed synchronous control method comprises the following steps of calculating a rotational speed of a virtual main shaft, taking the rotational speed as a given rotational speed of each motor; calculating weight average rotational speed of each motor, and taking the weight average rotational speed as a reference rotational speed of each motor torque compensation module; calculating a reference torque of each motor, and comparing the reference torque with an actual torque of the motor to obtain corresponding torque deviation; calculating a corresponding compensation torque of each motor, and adding the corresponding compensation torque to the torque deviation to obtain torque regulation quantity of each motor; comparing actual flux of the motor with given flux of a system to obtain flux deviation; controlling the motor according to the torque regulation quantity and the flux deviation so that accurate tracking on the given rotational speed of the system by the actual rotational speed of each motor can be achieved and the purpose of synchronous running at various motor rotational speeds is achieved. The invention also discloses a rotational speed synchronous control device of the multi-switch reluctance motor.

A power tool includes a detecting member mounted in an output end of a housing, and a to-be-detected member mounted in a driver. When the driver is assembled with the output end of the housing, the detecting member will detect the to-be-detected member and transmit a signal to a torque adjustment unit disposed in the housing so as to enable the torque adjustment unit to automatically adjust the torque applied to the driver to reach a predetermined value, thereby preventing damage to the driver.

The invention relates to the technical field of automobiles, in particular to a power switching control method of an extended-range automobile. The power switching control method comprises the steps that a required power of a range extender of the automobile is obtained; a target rotational speed and a target torque corresponding to the required power are obtained; an adjusting torque corresponding to the target rotational speed is calculated according to the target rotational speed; the torque of a generator is adjusted according to the adjusting torque, so that the generator can drag an engine to reach the target rotational speed; and the torque of the generator and the engine is adjusted according to the target torque, so that the generator and the engine reach the target torque. According to the power switching control method of the extended-range automobile, when the target power is switched, the switching path that target rotational speed adjustment is carried out first and thentarget torque adjustment is carried out is adopted, the problem of rotational speed overshoot in the switching process is optimized, the torque impact and work noise are reduced, the service life of the range extender is prolonged, and at the same time, the hardware cost and mechanical complexity are not increased.

The value of the rolling torque is measured at each frame through which a metal product passes, and the measurement is performed at the moment when said product reaches the following frame, at which point the frame at which the measurement is performed is switched over to torque regulation. The last frame reached by the product remains in speed regulation and it acts as a controlling frame for all other frames situated upstream therefrom so as to enable them to conserve torque equal to their respective reference torques by adapting their speeds. Once the reference torque measurements have been stored in the control system, regulation is obtained by making use of a distribution key for the stresses between the frames.

A method for adjusting the slip of a torque converter for a plurality of selected engine speeds, transmission gears and engine torque. A sensor is used to determine vibrations transmitted through the torque converter to the driveline of the vehicle. The sensor signal is sent to a controller where it is converted to the frequency domain. If the amplitude of the frequency signal exceeds a threshold, then the algorithm increases/decreases the converter slip until the driveline vibrations equal a threshold.

A muscle training and physical rehabilitation device is disclosed. The device is controllable by liquid based resistive units. The liquid based resistive unit utilizes either smart magnetorheological (MR) liquid whose resistance to motion can be adjusted by electromagnetism or by proportional valves with various liquids whose resistance can be controlled by an electronic signal. The MR fluid resistive units comprises a rotor supported by a bearing inside a housing, a stator mounted together with the housing to the mounting plate, and the MR liquid that flows inside the cavity formed by the vane of the rotor and chamber of the stator. The MR liquid is controlled by the applied electromagnetic field to adjust the resistance according to the exerted toque.

A torque socket having a torque adjusting function comprises: a shaft rod having two ends axially extended with an insertion tenon and a core shaft having a shaft hole and having the outer circumference thereof radially formed with a first friction surface; an adjustment member disposed in the shaft hole and having the outer circumference thereof formed with a top connection head and a connecting segment; and a shaft cylinder having two axial ends formed with a shaft slot and a sleeve slot, wherein the interior of the shaft slot is radially formed with a second friction surface being in contact with the first friction surface; when rotating the adjustment member, the outer dimension of the core shaft and the contact area of the first friction surface and the second friction surface can be altered for adjusting the torque.

A torque sensing apparatus has a torque adjusting assembly and a non-contact sensing assembly. The torque adjusting assembly has a fitting unit, a regulating rod and a regulating seat. The non-contact sensing assembly has a first device and a second device. The regulating rod is rotatably mounted through the fitting unit. The regulating seat is movably mounted on the regulating rod and located outside the fixed plate of the fitting unit. The first device is mounted on the fixed plate. The second device is mounted on the regulating seat and kept from contacting the first device. The non-contact sensing assembly detects a change of the distance between the first device and the second device and generates a signal to a controller, and the controller gauges a torsional value of the torque adjusting assembly. Therefore, the non-contact sensing assembly is not abraded and increases the precision of the torque sensing apparatus.

The invention relates to an electric drill with driving mode switching, belonging to the technical field of electric tools. The electric drill comprises a motor, a function switching cup and a torque regulating cup, wherein the motor is connected with an output shaft through a reducing mechanism in transmission mode. The invention is improved in the following ways: the other end of a conjunction piece abuts against one end of a locking ring; the other end of the locking ring is connected with an axial pressure regulating mechanism driven by the torque regulating cup; when the function switching cup is in a first switching position, contrate teeth of the movable and static impact rings are separated, and the locking ring forms axial constraint on the conjunction piece; when the function switching cup is in a second switching position, the contrate teeth of the movable and static impact rings remain separated, and the locking ring loses axial constraint on the conjunction piece; and when the function switching cup is in a third switching position, the contrate teeth of the movable and static impact rings abuts against each other, and the locking ring forms axial constraint on the conjunction piece. The invention can lower the manufacturing and assembly cost, is beneficial to avoiding poor quality caused by accumulated tolerance, and is easier to operate.

The invention discloses a braking device adopting a magnet brake to realize a vehicle locking prevention function and a control method. An oil return solenoid valve, an oil inlet solenoid valve, a braking pipeline pressure sensor, a wheel speed sensor and a braking pedal position sensor are connected with an integrated control unit through wire harnesses respectively; the integrated control unit collects the signals of the braking pipeline pressure sensor and the braking pedal position sensor to determine a target braking torque, distributes friction braking torque and electromagnetic braking torque reasonably, realizes a wheel locking prevention function through torque regulation of a magnet brake, and achieves the vehicle locking prevention function by utilizing the magnet brake; and the magnet brake participates in shunting of vehicle braking energy in the whole braking process, so that the braking is rapider and more stable, the braking noise is lower, poisonous friction dust produced by friction braking can be greatly reduced, the safety and the thermal failure prevention performance of a braking system are improved, the service life of the braking system is prolonged, and the maintenance cost of the braking system is reduced.

A braking-force control device has a brake control function for performing brake control on a front outside wheel when a vehicle is detected to be in an oversteer condition during a turning operation and for performing brake control on a rear inside wheel when the vehicle is detected to be in an understeer condition during a turning operation. For preventing the oversteer condition, a command for reducing the engine torque is output. On the other hand, for preventing the understeer condition, the engine torque is limited in accordance with a permissible engine torque value that is calculated on the basis of a road-surface friction coefficient, and ground loads and lateral tire forces of individual wheels. If it is detected that engine braking is in operation, the engine torque is adjusted to substantially zero.

A vehicle buncher of three states is featured as setting front and back planetary rows coaxially and forming their external tooth circles in one body , connecting front sun wheel to driving portion of buncher through hollow shaft and connecting driven portion of buncher to back sun wheel through shaft , using back planetary frame to output power , connecting clutch one on shaft connected to back sun wheel and connecting clutch two on shaft connected to front sun wheel , setting torque regulation unit on front planetary frame to correspond to frame planetary wheel coaxially and setting clutch three on front planetary frame to correspond to front planetary wheel coaxially .

The invention discloses a control method of a handheld electric-driven tool, wherein a first current threshold value and a smaller second current threshold value are set; when the current of a motor achieves the second current threshold value, the rotary speed of the motor is maintained; and when the current of the motor achieves the first current threshold value, the motor is controlled to be stopped, thus improving the precision of torsion adjusting. The invention also provides a handheld electric-driven tool.

The invention discloses an electric-vehicle driving anti-sliding and anti-lock braking control method. The method includes the steps that a set value of whole vehicle torque is obtained, working modesof an electric vehicle are obtained, and a vehicle-speed change rate threshold value and a motor-output maximum torque amplitude value under corresponding working modes are obtained; the real-time vehicle speed change rate of the vehicle is obtained, and the torque regulating amount is calculated through the vehicle-speed change rate threshold value and the real-time vehicle speed change rate; according to the torque adjusting amount, the set value of the whole vehicle torque and the motor-output maximum torque amplitude value, a motor actual-torque command value is obtained, and the motor isdriven to adjust the torque. According to the electric-vehicle driving anti-sliding and anti-lock braking control method, a vehicle-speed measuring device is not required to be installed, the groundroad condition is not required to be identified and estimated, and the driving anti-sliding and anti-lock braking function of a common electric vehicle can be achieved without additionally arranging any other hardware and equipment resources; the electric-vehicle driving anti-sliding and anti-lock braking control method can adapt to various different driving systems and different road conditions,and can be transplanted to any hybrid power vehicle.