Abstract: A method for controlling a multi-mover direct drive transmission system and related devices, including: S1: detecting a real-time position of the mover units movable in the feedback segments; S2: determining whether the mover unit enters junction region between the feedback and transition segments: if yes, calculating, by using preset algorithm, an electrical angle at which the mover unit moves in the transition segment, and determining real-time position of the mover unit through the electrical angle; and setting cooperative control mode of the stator windings in a range of the transition segment according to the real-time position of the mover unit; and S3: determining whether the mover unit enters the junction region between the transition segment and the feedback segment: if yes, feeding back real-time position of the mover unit through the displacement sensor of the feedback segment. The above solution has a good control effect, low costs, and low mounting requirements.

Abstract: A multi-mover direct drive transmission system, including: stator unit formed by stator segments and includes frame and coil windings; mover units movable relative to the stator unit and each includes mover slidably connected to the stator unit and movable relative to the frame, and magnet fixed to the mover; and actuators. The magnet is arranged opposite to and spaced from the coil winding, and the coil winding drives the magnet to drive the mover. The frame includes feedback segments and transition segments. The stator unit further includes hall elements. The hall element outputs a hall signal according to a magnetic field variation detected. The actuator calculates an electrical angle and calculates a drive current, the coil winding drives the magnet to move to realize position correction. The multi-mover direct drive transmission system has a simple structure, a small number of components, and is simple and easy-to-implement the motion control method.

Abstract: A single axis robot includes: a base plate, a first guiding unit extending along a first direction, a first slider, a driver, a second guiding unit extending along a second direction, a second slider and a third guiding unit extending along a third direction. The first end of the first slider is connected to the first guiding unit to realize guiding fitting. The driver is connected to the first slider. The second guiding unit is provided at a second end of the first slider. A first end of the second slider and the second end of the first slider form guiding fitting. A plane of the third direction is perpendicular to a plane of the first direction. With the first and second sliders and the first, second and third guiding units, the movement along the axial direction of the driving screw is converted into movement in a direction perpendicular thereto.

Abstract: A multi-mover direct drive transmission system, including: stator unit formed by stator segments and includes frame and coil windings; mover units movable relative to the stator unit and each includes mover slidably connected to the stator unit and movable relative to the frame, and magnet fixed to the mover; and actuators. The magnet is arranged opposite to and spaced from the coil winding, and the coil winding drives the magnet to drive the mover. The frame includes feedback segments and transition segments. The stator unit further includes hall elements. The hall element outputs a hall signal according to a magnetic field variation detected. The actuator calculates an electrical angle and calculates a drive current, the coil winding drives the magnet to move to realize position correction. The multi-mover direct drive transmission system has a simple structure, a small number of components, and is simple and easy-to-implement the motion control method.

Abstract: The disclosure provides a direct drive motor, including: a primary assembly, the primary assembly including a slide, a coil assembly fixed to the slide, and two first end covers respectively fixed to the slide; and a secondary assembly, the secondary assembly including a base arranged opposite to the slide, a yoke fixed to the base, a magnet assembly fixed to the yoke, and two second end covers respectively fixed to two opposite circumferential sides of the base. The slide is slidably supported on the base. A side of each of the second end covers close to the yoke is provided with a mounting groove recessed in a direction away from the yoke, and two opposite ends of the yoke are respectively inserted and fixed in the mounting grooves of the two second end covers.

Abstract: A method for controlling a multi-mover direct drive transmission system and related devices, including: S1: detecting a real-time position of the mover units movable in the feedback segments; S2: determining whether the mover unit enters junction region between the feedback and transition segments: if yes, calculating, by using preset algorithm, an electrical angle at which the mover unit moves in the transition segment, and determining real-time position of the mover unit through the electrical angle; and setting cooperative control mode of the stator windings in a range of the transition segment according to the real-time position of the mover unit; and S3: determining whether the mover unit enters the junction region between the transition segment and the feedback segment: if yes, feeding back real-time position of the mover unit through the displacement sensor of the feedback segment. The above solution has a good control effect, low costs, and low mounting requirements.

Abstract: A method for controlling a direct drive system, including: S1: outputting, by the actuator, a current to the winding of the stator corresponding to the actuator to cause the windings to drive the mover corresponding to the windings to move in a single direction along the guide rail; S2: sensing a position of the second position feedback means through the first position feedback means, and acquiring position information of the mover relative to the stator; and S3: changing a drive mode of the actuator according to the position information, so that the actuator adjusts, according to the drive mode, magnitude of the current outputted to the windings of the stator corresponding to the actuator. The above solution can reduce a number of power modules used in the direct drive system, so as to reduce overall manufacturing and use costs of the direct drive system.

Abstract: A method produces tantalum powder by reducing tantalum oxide with an alkaline earth metal. The method includes (1) mixing tantalum oxide with an excessive alkaline earth metal reducing agent, simultaneously mixing at least one alkali metal and/or alkaline earth metal halide accounting for 10-200% of the weight of the tantalum oxide, heating the mixture to a temperature of 700-1200° C. in a furnace filled with inert gas, and soaking so that the tantalum oxide and reducing agent are subjected to a reduction reaction; (2) at the end of soaking, lowering the temperature to 600-800° C., vacuumizing the interior of the furnace to 10 Pa or less, and soaking under the negative pressure so that the excessive magnesium and tantalum powder mixture are separated; (3) thereafter, raising the temperature of the furnace to 750-1200° C.

Abstract: The present disclosure provides a direct drive transmission system and a control method. The direct drive transmission system includes: a base plate, guide rails, a plurality of stators, a mover, a first position feedback device, a plurality of second position feedback devices, a plurality of drivers, and a controller. The first position feedback device aligns with a respective second position feedback device. The plurality of stators are configured to drive the mover to slide on the guide rails. The plurality of second position feedback devices are arranged at intervals and are electrically connected to the controller. The controller is configured to control driving operations of the plurality of drivers according to effective position information fed back by the plurality of second position feedback devices.

Abstract: The present invention provides a method and device for calibrating a position of a mover in a direct drive transmission system. In response to receiving an arriving signal for a mover corresponding to a preset detection station, an image acquisition device disposed above the detection station is controlled to acquire an image of the mover; feature recognition is performed on the image of the mover, and an actual coordinate position of a preset feature image area is acquired in the image of the mover; a mover-arriving detection result is generated based on the actual coordinate position; and a calibration signal for the position of the mover is generated based on the mover-arriving detection result.

Abstract: The multi-mover direct drive transmission system includes multiple stator units, a guide rail, multiple mover units, and a controller. Each of the multiple stator units includes a stator, a winding, a photoelectric switch, a reading head, and a driver. Each of the multiple mover units includes a mover, and a magnetic steel, two stoppers, and a grating ruler. Each of the two stoppers are configured to pass and block the photoelectric switch. The grating ruler is arranged opposite to the reading head, and the reading head is configured to read information from the grating ruler in real-time. The controller is configured to obtain the reading signal and two zero signals from the photoelectric switch by the driver. Compared with the conventional art, the multi-mover direct drive transmission system of the present invention has simple structure, high positioning accuracy, and easy to use.

Abstract: The present disclosure provides a direct drive system, a control method for the same, an electronic device and a storage medium. In the direct drive system, the plurality of primary units are designed to have the position mode and the current mode. In the position mode, a position control instruction is output according to the absolute position information of a mover on the guide rails and predetermined positions of the mover on the guide rails, in order for a respective driver to adjust current in at least one winding primary unit according to the position control instruction, to move the respective mover to a predetermined position. In the current mode, a current control instruction is output, in order for the respective driver to provide current to the at least one winding according to the current control instruction, to compensate a thrust loss occurred in movement of the respective mover.

Abstract: The present disclosure provides a linear drive device, which includes: a stator including a stator body and a plurality of coils. The linear drive device further includes a rotor including a rotor body supported on the stator body, and a magnetic steel fixed on the rotor body, a first position feedback unit fixed on the rotor body, and multiple drivers. The multiple coils arranged in series or parallel are electrically connected to one of the multiple drivers, while remaining coils not arranged in series or parallel are divided into multiple groups, and multiple coils in each of the multiple groups are electrically connected to the other driver. The linear drive device further includes a controller electrically connected to the multiple drivers. The linear drive device in the present disclosure not only saves the number of drivers, but also reduces the difficulty of controlling the entire control system.

Abstract: The present disclosure provides a direct drive transmission system and a control method. The direct drive transmission system includes: a base plate, guide rails, a plurality of stators, a mover, a plurality of drivers, and a controller. The plurality of stators are configured to drive the mover to slide on the guide rails. A transmission line composed of the plurality of stators is configured to have at least one low-accuracy segment and at least one high-accuracy segment connected to each other. The direct drive transmission system further includes at least one first switching signal device and a plurality of second switching signal devices. The at least one first switching signal device aligns with a respective second switching signal device, and each second switching signal device is electrically connected to a respective driver or the plurality of second switching signal devices are all electrically connected to the controller.

Abstract: The disclosure provides a direct drive transmission system. The direct drive transmission system includes a mover unit and a stator unit driving the mover unit to move. The stator unit includes a stator assembly, two first end covers, and two first guide rails. The mover unit includes a mover assembly, two second end covers, and two second guide rails. The direct drive transmission system further includes a limiting structure. An end of the limiting structure close to each of the second end covers is located between the two second end covers. The stator assembly drives the mover assembly to cause the second guide rail to move along the first guide rail, such that the second end cover contacts a side wall of the limiting structure to realize limiting.

Abstract: The present disclosure provides a multi-rotor direct drive transmission system, which includes multiple stator units, a guide rail, and multiple rotor units. Each of the multiple stator units includes a stator and a magnetic steel, and the guide rail is attached to the stator. Each of the multiple rotor units includes a rotor, a winding, a drive device, and a power supply unit. The winding is spaced from and arranged directly opposite to the magnetic steel, and the winding is configured to drive the magnetic steel. The drive device is electrically connected to the winding, and the drive device is connected to the control system by wireless communication. The multi-rotor direct drive transmission system further includes a conductive strip. The power supply unit is a movable cable. The multi-rotor direct drive transmission system of the present disclosure is simple in structure, and is easy to control and use.

Abstract: The disclosure provides a direct drive transmission system including a mover unit and a stator unit driving the mover unit to move. The stator unit includes a stator assembly, two first end covers, and two first guide rails. A side of the first end cover close to the first guide rail is recessed inwardly to form a first mounting groove, and two ends of the first guide rail are respectively inserted into the first mounting groove. The mover unit includes a mover assembly, two second end covers, and two second guide rails. A side of the second end cover close to the second guide rail is recessed inwardly to form a second mounting groove, two ends of the second guide rail are respectively inserted into the second mounting groove. The stator assembly drives the mover assembly to cause the second guide rail to move on the first guide rail.

Abstract: A method produces tantalum powder. The method includes: (1) uniformly mixing a tantalum powder raw material, metal magnesium and at least one alkali metal and/or alkaline earth metal halide, loading the mixture into a container, and putting the container in a furnace; (2) raising the temperature of the furnace to 600-1200° C. in the presence of inert gas, and soaking; (3) at the end of soaking, lowering the temperature of the furnace to 600-800° C., vacuumizing the interior of the furnace to 10 Pa or less, soaking under the negative pressure so that the excessive metal is separated; (4) thereafter, raising the temperature of the furnace to 750-1200° C. in the presence of inert gas, and soaking so that the tantalum powder is sintered in the molten salt after oxygen reduction; (5) then cooling to room temperature and passivating to obtain a mixed material containing halide and tantalum powder; and (6) separating the tantalum powder from the resulting mixture.

Abstract: A low-carbon, high-purity tantalum pentoxide powder has a carbon content of no greater than 15 ppm. A preparation method for the powder includes: (1) adding a fluotantalic acid (H2TaF7) solution into a reaction kettle, controlling the temperature of the reaction kettle at 30-60° C., adding a precipitator until the pH of the reaction solution is 8-10, then stopping introducing ammonia, and aging to obtain a tantalum hydroxide slurry; (2) filtering and washing the slurry obtained in step (1), and then carrying out solid-liquid separation to obtain a tantalum hydroxide filter cake; (3) drying the filter cake obtained in step (2) to obtain white tantalum hydroxide powder; (4) calcining the tantalum hydroxide powder obtained in step (3), crushing and screening the calcined sample to obtain tantalum pentoxide powder; and (5) subjecting the tantalum pentoxide powder obtained in step (4) to heat treatment at a temperature of 1000-1500° C. to obtain the powder.

Abstract: The disclosure provides a method for heat-treating a boron steel, which includes: carburizing a boron steel on a surface thereof to obtain a carburized boron steel; austenitizing the carburized boron steel at a temperature of 885-895° C. for 25-35 min, to obtain an austenitized boron steel; sequentially subjecting the austenitized boron steel to an oil quenching and a tempering, wherein the oil quenching is performed at a temperature of 55-65° C. for 29-31 min.