59 results about "Eddy current brake" patented technology

Magnetic braking device comprising at least one stator (2) and at least one rotor (3), and electromagnets (5) secured to the rotor and / or the stator to produce between them, when the rotor rotates, at least one magnetic field capable of generating eddy currents braking the rotor. According to the invention, the device comprises at least one control unit (7) capable of controlling an alternating electrical power supply of at least some of the electromagnets so that the magnetic field is a rotating magnetic field, the control unit being configured to adapt a rotation speed of said magnetic field as a function of at least one data characteristic of the rotation speed of the rotor 1 by acting on at least one of the parameters of the electrical power supply of at least one of the electromagnets. FIGURE OF THE ABSTRACT: Fig. 3

The invention relates to a magnetic braking device comprising at least one stator (2) and at least one rotor (3), and electromagnets (5) rigidly connected to the rotor and / or the stator so as to produce therebetween, when the rotor rotates, at least one magnetic field capable of generating eddy currents braking the rotor. According to the invention, the device comprises at least one control unit (7) capable of controlling an AC power supply of at least some of the electromagnets such that the magnetic field is a rotating magnetic field, the control unit being configured to adapt a rotational speed of the magnetic field as a function of at least one data item characteristic of the rotational speed of the rotor (1) by determining at least one of the power supply parameters of at least one of the electromagnets.

The invention belongs to the technical field of injection molding equipment, and discloses a testing machine for simulating the load of a servo motor of an injection molding machine and a self-adaptive control method.The testing machine comprises a motor input unit, a gear reduction unit, a load unit and a monitoring unit; and dynamic load characteristics in an injection molding process are simulated. According to the self-adaptive control method, a BP-PSO-PID algorithm is adopted, a load signal is collected in real time and compared with a target value to generate an error, the error is input into a BP neural network to output PID parameters, the weight of the neural network is optimized online through a particle swarm optimization algorithm, and dynamic adjustment is achieved. According to the method, load changes in the glue injection, pressure maintaining and glue melting stages are simulated through a three-section type load curve, closed-loop control is formed in combination with the quick response characteristic of the eddy current brake, and the test precision and the self-adaptive capacity are remarkably improved. The dynamic load is accurately reproduced, the research and development cost is reduced, and the research and development period is shortened.

The invention relates to a braking device (200) for generating a total braking torque for a vehicle (42), comprising: an eddy current braking device (10), an energy storage device (24), and an electric machine (46, 48) connected to the energy storage device (24). The eddy current braking device (10) has a stator part (12), a rotor part (16) rotatably arranged relative to the stator part (12) about an axis of rotation (14) with a shaft (18) arranged in the axis of rotation (14), and an actuator device (10, 28, 32). The rotor part and stator part are arranged concentrically to each other with an air gap (20) between them. The stator part (12) includes an excitation device (22) for generating a primary magnetic field.An induction device is designed to induce eddy currents by a magnetic field, thereby generating a first braking torque (120, 122), wherein the actuator device (10, 28, 32) generates a force (30, 34) by means of which the rotor part (16) and stator part (12) are displaced relative to each other, thereby generating contact between the stator part (12) and rotor part (16) and generating a second braking torque (120, 122). The eddy current braking device (10) and / or the electric machine (46, 48) are coupled, at least temporarily, to at least one wheel (44) of the vehicle (42). The invention further relates to a vehicle with such a braking device and to a method for generating a total braking torque.

The invention relates to a model-based fuel cell air compressor high-speed motor control rack and method. The control rack comprises an air compressor high-speed motor load control model, a high-power direct-current power supply, a three-phase two-level motor driver, a motor rapid prototype controller, an upper computer, a permanent magnet synchronous motor, an eddy current brake, a torque sensor and a signal acquisition and coding unit. The control rack constructs a load control model based on air compressor MAP data and a load torque optimization algorithm, calculates a target load torque corresponding to the highest adiabatic efficiency point according to any rotating speed, and controls the eddy current brake to perform accurate load simulation; meanwhile, a user-defined control algorithm is automatically compiled and deployed to a motor driver through a rapid prototype controller, the permanent magnet synchronous motor is driven to operate under a simulated load, and high-precision signal feedback is combined, so that safe, efficient and high-fidelity real-time closed-loop verification of the control algorithm is realized, and the research and development period is remarkably shortened.

The brake device (1) provided for a railway vehicle comprises at least one wheelset (99) having a wheelset axle (98), along which a wheelset axis (y) extends coaxially, and the brake device (1) comprises wheels (9, 9', 9'') directly or indirectly connected to the wheelset axle (98) and rotatable about a wheel axis (x), and comprises eddy current rotors (22A; 22B) connected to the wheels (9, 9', 9''), and the eddy current rotors (22A; 22B) and at least one friction brake (3; 3A, 3B) having a friction rotor (32; 32A, 32B; 92) connected to or integrated in the wheels (9, 9', 9'') and having a friction stator (31; 31A, 31B) displaceable relative to the friction rotor (32; 32A, 32B; 92). - the eddy current brake (2A; 2B) and the friction brake (3; 3A, 3B) can be sequentially actuated by a single actuation device (7) and drive device (8), said drive device (8) being connected to the actuation device (7) and controllable by a control unit (10); the eddy current rotor (22A; 22B) is designed as one piece or segmented, has a disk or ring shape, is aligned coaxially with the wheel axis (x) and is connected to one side of the wheel (9, 9', 9'') or is integrated into the wheel (9, 9', 9''); at least one eddy-current stator (21A; 21B) is designed as one piece or segmented and is displaceable in the direction of the wheel axis (x) in front of the eddy-current rotor (22A; 22B) or tiltable segment-by-segment relative to the eddy-current rotor (22A; 22B); - the wheels (9, 9', 9'') have a wheel rim (92) acting as a friction rotor (32) with a front surface (921) directed radially outward with respect to the wheel axis (x) acting as a braking surface, and the friction stator (31) is displaceable with respect to the front surface (921).

The application provides a kind of pneumatic permanent magnetic eddy current brake device and brake control system, it is related to two-wheel car brake device technical field, the pneumatic permanent magnetic eddy current brake device includes rotating brake disc, permanent magnet assembly and pneumatic drive assembly, rotating brake disc is fixedly arranged on wheel hub, and with wheel hub synchronous rotation;Permanent magnet assembly includes support disc and multiple permanent magnets, support disc is oppositely arranged with rotating brake disc, permanent magnet is located between support disc and rotating brake disc, all permanent magnets are distributed on support disc along the circumference direction;Pneumatic drive assembly is drivingly connected with support disc;The pneumatic permanent magnetic eddy current brake device of the application is on one hand to adopt frictionless braking, can effectively reduce the brake loss of mechanical brake device, prolong service life, on the other hand, it is independent structure, can be directly installed on existing two-wheel electric vehicle, and the modification is convenient and has strong versatility, and the braking force is balanced, can be mutually matched with mechanical brake device, forms double mode cooperative braking, and the braking effect is remarkable.

The invention relates to an eddy current brake (10) with a brake element (18) in the form of a brake disc (20) or a brake drum (28) and with an excitation element (32) cooperating with the brake element (18), comprising one or more excitation coils (38, 64, 66, 68, 70). The at least one brake element (18) is stationary in or on a housing (12) of a drive provided with fluid cooling (16) and is cooled by the fluid cooling (16). The at least one excitation element (32) is disc-shaped and designed to rotate relative to the at least one brake element (18). Furthermore, the invention relates to an eddy current brake (10) with an excitation element (32) comprising a permanent magnet (84) or a group (86) of permanent magnets (84).

The invention discloses a constant-power vehicle capable of accurately measuring motion power, and relates to the technical field of fitness equipment, the constant-power vehicle comprises a base and a driving shaft rotatably mounted on the base, two ends of the driving shaft are connected with a crank and a pedal, and the driving shaft is provided with a first driving wheel; the intermediate shaft is rotationally mounted on the base, and a first driven wheel is arranged on the intermediate shaft and is in transmission connection with the first driving wheel; the eddy current brake comprises a stator and a rotor (rotatably mounted and provided with a second driven wheel in transmission connection with the second driving wheel). The speed measuring unit is provided with a first sensor used for measuring the rotating speed of the intermediate shaft. The main control circuit board is in signal connection with the first sensor and the force sensor. By measuring the resistance of the eddy current brake and the rotating speed of the intermediate shaft, the actual exercise power of a user can be accurately obtained through calculation of the main control circuit board, and the fitness requirement can be better met.

The present invention provides a train braking method, device, storage medium, and electronic device, relating to the field of train braking technology. The train includes an eddy current braking device, and the method includes: obtaining a maximum electric braking force, a maximum eddy current braking force, and a required total braking force; wherein the maximum eddy current braking force is provided by the eddy current braking device; determining a numerical relationship between the required total braking force and the maximum electric braking force and the maximum eddy current braking force; and when the numerical relationship satisfies a preset relationship, adding eddy current braking so that the train brakes based on the braking method after adding eddy current braking. The technical solution provided by the present invention can effectively brake when the train is running at high speed and can reduce the loss of the windings during braking, thereby ensuring the safe operation of the train.

The utility model discloses a magnetic eddy current brake device. The magnetic eddy current brake device comprises a brake caliper; the brake structures are respectively and movably embedded in the brake calipers and are positioned at the central part; the utility model relates to the field of brake devices, in particular to a brake device, which comprises a brake caliper, a main shaft, a pair of pistons, a brake disc and a pair of sensing metal rings with the same structure, and is characterized in that the brake caliper is fixed on a vehicle body, the brake disc is fixed on the main shaft, and the device is fixed; before the brake pad makes contact with the brake disc, the magnetic block and the induction metal ring continuously approach to generate a magnetic eddy current effect and generate a speed reduction effect on the main shaft, and as the magnetic block and the induction metal ring decelerate the main shaft before the brake pad makes contact with the brake disc, the brake pad can brake the brake disc more easily, abrasion of the brake pad is effectively reduced, and the service life of the brake pad is prolonged. Through the structure, the brake performance of the device is improved, and the loss of the brake pad is greatly reduced.

Roll stabilizer for a vehicle (100) comprising an actuator device (101) and two stabilizer elements (102, 104) coupled to each other via an actuator (106) of the actuator device (101) to effect a relative movement between the stabilizer elements (102, 104), wherein the actuator device (101) has a supply line connection (116) for providing a supply voltage to a supply connection (114) of a converter (108), the converter (108) for providing an alternating voltage using the supply voltage, an actuator (106) operable by the alternating voltage, and an eddy current brake (110) having an eddy current brake connection (234) coupled to a shaft (120) of the actuator (106), wherein the actuator device (101) has a control device (112) configured to To activate the eddy current brake (110) in response to generator operation of the actuator (106).

The application belongs to the technical field of eddy current braking system, and particularly relates to a permanent magnetic eddy current brake. The technical scheme is as follows: a permanent magnetic eddy current brake comprises a metal brake plate unit and a brake magnet unit, the brake magnet unit comprises a permanent magnet array, and the permanent magnet array is arranged close to the metal brake plate unit; as viewed from the metal brake plate unit to the permanent magnet array, the magnet poles of the magnets on the right side of the permanent magnet array are deflected in a clockwise direction relative to the magnet poles of the magnets on the left side, and the deflection angle is less than 180 DEG. The application provides a permanent magnetic eddy current brake capable of improving the utilization rate of magnets.

The present application relates to a kind of based on eddy current brake adhesion brake force enhancement method and system, comprising the following steps: when high-speed train implements emergency brake, linear eddy current brake is connected into excitation current and enters working state;On the basis of cooperating longitudinal non-adhesion brake force generated by linear eddy current brake, the surplus of maximum axle load and actual axle load is controlled excitation current to make vertical suction force in safe range, simultaneously using the vertical suction force generated, combined with the adhesion coefficient calculation obtains the increased high-speed train adhesion force available domain;Additional adhesion force available is fed back to adhesion brake system to improve adhesion brake force, and the braking effect of high-speed train is improved;With longitudinal non-adhesion brake force generated by linear eddy current brake, further realize the efficient matching use of brake force and adhesion force under multiple working conditions.The present application can be applied to any kind of linear eddy current brake, further improves total brake force on the basis of original high-speed train brake system, and improves brake efficiency.

The invention provides an eddy current brake plate design method and device, computer equipment and a storage medium, and the method comprises the steps that a brake acceleration index is determined based on the brake requirement of a magnetic suspension propulsion system, and the brake requirement comprises the operation speed and the brake time; calculating a target braking force corresponding to the braking acceleration index; braking force curves under different plate widths are simulated through electromagnetic simulation software, and the braking force curves are curves of braking force changing along with speed; selecting an optimal braking force curve from the braking force curves according to the target braking force; and the eddy current brake plate is designed based on the plate width corresponding to the optimal brake force curve. In the technical scheme provided by the invention, by simulating the braking force curves under different plate widths, the braking characteristics under different plate widths can be quickly and accurately known, so that the eddy current braking plate meeting the braking requirement is quickly designed, and the braking performance is improved.

The invention relates to a high-saturation ferrocobalt alloy and a low-temperature high-toughness eddy current braking magnetic pole. The high-saturation iron-cobalt alloy comprises the following components: 16%-18% of Co; 1.4% to 2.2% of Cr; mo: 0 or < = 1.5%; v: 0 or < = 0.4%; and the balance of Fe and inevitable impurity elements. The invention also provides a low-temperature high-toughness eddy current brake magnetic pole which is prepared from the high-saturation iron-cobalt alloy through smelting, forging, heat treatment and machining. According to the high-saturation iron-cobalt alloy and the low-temperature high-toughness eddy current braking magnetic pole prepared from the high-saturation iron-cobalt alloy, the components of the iron-cobalt alloy material are regulated and controlled, so that the magnetic pole prepared from the high-saturation iron-cobalt alloy has high saturation magnetic performance and excellent low-temperature impact toughness.

The utility model discloses a vortex braking formula belt conveyor vertical tension buffer device, and the device includes vertical tension stand and counterweight box, and the vertical tension stand is equipped with vertical vortex generation rib plate along the radial of outer periphery, and the vortex generation rib plate height is same with vertical tension stand height, and the vertical tension stand is 2, and the mirror image symmetry is arranged in the both sides of counterweight box, the counterweight box bottom is connected with fixed frame, and the fixed frame includes a plurality of recesses with vortex generation rib plate cooperation, and the inner wall both sides of each recess are equipped with the permanent magnet patch of different name magnetic pole arrangement, the part that vortex generation rib plate extends outward is located in the inner recess space of fixed frame recess, and there is fixed gap between recess inner wall and permanent magnet patch, when the counterweight box falls vertically, and vortex generation rib plate cuts the magnetic induction line and produces resistance, effectively reduces the falling speed of counterweight box, and reduces the ground impact force, and the device cooperates with original flexible buffer device, can effectively protect building structure and tension device.

A combined drive / brake unit (100) integrated into the rim (111) of a wheel (112) includes an axial flux motor (118) and an eddy current brake (120), wherein a common rotor (106) is provided for the axial flux motor (118) and the eddy current brake (120).

A braking system for use with a crusher having a moving crushing member and a stationary crushing member. The braking system is positioned and is operable to restrict rotational movement of the moving crushing member. The braking system includes a braking disc or plate and one or more braking yokes that each include a magnetic member, such as a permanent magnet or an electric magnet. The braking disc is formed from an electrically conductive material and is perpendicular to the magnets of the braking yoke. Relative movement between the braking disc and the braking yoke induces an eddy current in the braking disc. The induced eddy current creates a magnetic force that opposes rotational movement of the moving crushing member. The braking system can be used with a compact eccentric crusher to restrict the rotation of a crushing roller during an idle mode.

The invention discloses a multi-redundancy control and safety protection system and method for vortex magnetic braking of a drilling platform. The system is characterized in that a first controller and a second controller of a control module operate in a main-standby redundancy mode; a first direct-current driving device and a second direct-current driving device of the driving module are in communication connection with the control module and are controlled by the control module; the first direct-current driving device and the second direct-current driving device are respectively connected with the vortex magnetic brake coil for driving; the power supply standby module comprises a standby emergency busbar used for providing power for a vortex magnetic brake, a standby direct-current power supply used for providing power for a vortex magnetic brake coil and a standby control power supply used for providing power for the control module. The first controller and the second controller are further used for conducting fault diagnosis and early warning and alarm processing on the vortex magnetic brake according to the real-time electrical data. And the control state of the vortex magnetic brake is determined according to the state of the dry contact signal, and an output control signal is determined according to a preset parabola control curve and preset protection logic.

The invention provides an eddy current retarder control method and device, electronic equipment and a storage medium, and relates to the technical field of automobile auxiliary braking, and the method comprises the steps that under the conditions that the pressure of a braking main oil cylinder is lower than a preset minimum threshold value and a braking depth signal exceeds a minimum threshold value, an eddy current hand switch is controlled to respond to eddy current braking; under the condition that Ready of the whole vehicle falls off, the eddy current braking force is increased according to the braking depth signal; and under the condition that the whole vehicle runs normally, eddy current gears are gradually increased according to the braking depth. Different eddy current braking strategies are adopted according to different conditions of the braking system, and therefore the technical problem that eddy current control is not matched with mechanical braking and electric feedback braking of the new energy vehicle is solved.

The utility model discloses an improved eddy current brake which comprises a main body, water outlet pipelines are arranged on the front side and the rear side of the upper end of the main body, water inlet pipelines are arranged on the front side and the rear side of the lower end of the main body, the water inlet pipeline on one side has a W-shaped section, and each trough point or each crest point of the water inlet pipelines is provided with an arched double-sided filter screen. According to the utility model, the water inlet pipeline is designed into a W-shaped section, and the reasonable arched double-sided filter screen is arranged at an impact point, so that the filtration of impurities in a water body is enhanced; the arched double-sided filter screen is designed to be of an asymmetric structure with wide inlet and narrow outlet, and the flow direction characteristic of cooling water is combined, so that the impurity removal efficiency is improved, and meanwhile, the influence on cooling water conveying is reduced; a water inlet pipeline structure which firstly descends and then ascends is adopted, and the modes of sieve flushing and sieve overflowing are combined, so that the structure is more reasonable and scientific; while the filtering effect is guaranteed, a gap is reserved, installation and filter screen protection are facilitated, the maintenance workload is reduced, and the fault occurrence frequency is reduced.

The application provides an aviation turboshaft engine simulation measurement and control platform and system, and belongs to the technical field of aviation engines, and specifically comprises a total distance control module, which is used for taking the state of a total distance lever as a target value, controlling the power of an electric eddy current brake by adopting a closed loop control method, and sending the signal of the total distance lever to an ECU; a throttle control module, which is used for controlling the state of a throttle and sending the signal of the throttle to the ECU; an atmospheric data module, which is used for transmitting the flight height and flight speed to the ECU; an engine control module, which is used for controlling the starting, false starting and stopping of a turboshaft engine; a data monitoring module, which is used for acquiring the data of test sensors, the ECU and a torque speed sensor; and a data display module, which is used for displaying the data acquired by the data monitoring module. Through the processing scheme, the problem that the power of the electric eddy current brake cannot be automatically controlled and the problem that there is no total distance lever in the existing measurement and control platform are solved.

The application provides an opening and closing mechanism, a permanent magnetic eddy current brake and a railway vehicle. The opening and closing mechanism comprises a connecting component for connecting the opening and closing mechanism with the permanent magnetic eddy current brake; two side baffles respectively located at two sides of a magnetic pole assembly and connected with the connecting component, the two side baffles respectively extend along the length direction of the magnetic pole assembly to shield the magnetic pole assembly on the side; an opening and closing component, the opening and closing component is installed at the bottom of the two side baffles and located below the bottom surface of the magnetic pole assembly, the opening and closing component can be opened or closed to expose or shield the bottom surface of the magnetic pole assembly; a driving component, when the brake state is switched to the relief state, the driving component can drive the opening and closing component to be closed, when the relief state is switched to the brake state, the driving component can drive the opening and closing component to be opened. The opening and closing mechanism can effectively ensure the switching of the brake state and the relief state of the permanent magnetic eddy current brake, has simple structure and high reliability.

The application discloses a PGK intelligent control method and system, and belongs to the technical field of precision guidance. The control method comprises the following steps: driving the relative rotation movement of a separate steering ring and a PGK body in the same direction; a controller calculates the absolute rotation speed of the PGK body and the target absolute azimuth angle of the hovering separate steering ring in real time based on a magnetic modulation-rotation speed solving model; based on an eddy current braking torque model, the excitation current of a micro eddy current excitation coil array is adjusted to generate an eddy current braking torque opposite to the rotation direction of the separate steering ring; the eddy current braking torque is controlled to reach dynamic balance with the torque acting on the separate steering ring, so that the separate steering ring is stabilized at the target absolute azimuth angle. The application completely replaces the traditional'motor-reducer' mechanical transmission in an electromagnetic non-contact manner, fundamentally solves the problems of mechanical wear, response delay and poor environmental adaptability, and realizes the structure simplification, performance improvement and high reliability of the PGK control system.

The invention relates to a braking device (10) of a vehicle, in particular an eddy current brake (12) of a vehicle. The braking device (10) comprises a magnet element (24) and a braking element (18) which are configured symmetrically with respect to an axis of symmetry (16). The braking device (10) is implemented in a combined axial / radial configuration (40), wherein the stator (42) is surrounded by the rotor (60). The invention further relates to a method for using the brake device (10) in a vehicle.

A disc-shaped permanent magnet eddy current brake device comprises an axle (70), a brake disc (10) attached to the axle (70), and a permanent magnet eddy current brake device located on one side of the brake disc (10), wherein the permanent magnet eddy current brake device comprises an outer ring permanent magnet unit (30) and an inner ring permanent magnet unit (40), the outer ring permanent magnet unit (30) comprises a plurality of sets of outer ring permanent magnet bodies (31) uniformly distributed along the circumferential direction, the S poles and N poles of the outer ring permanent magnet bodies (31) are arranged alternately in sequence, the inner ring permanent magnet unit (40) comprises a plurality of sets of inner ring permanent magnet bodies (41) uniformly distributed along the circumferential direction, the S poles and N poles of the inner ring permanent magnet bodies (41) are arranged alternately in sequence, and the inner ring permanent magnet unit (40) is rotatable relative to the outer ring permanent magnet unit (30) to control the braking force by changing the phase of the inner ring permanent magnet bodies (41). This device generates a magnetic field using permanent magnets to prevent the rotation of the brake disc, and controls the rotation of the stator by a drive motor, thereby generating or stopping eddy currents and braking force, replacing friction brakes and reducing wear on the friction pair.

Among other things, a rowing exercise machine includes a movable inertial element, an eddy current brake coupled to the movable inertial element, a rowing grip coupled to the movable inertial element, and control circuitry coupled to the eddy current brake to cause a resistance to motion of the rowing grip during part of a rowing stroke. The resistance to motion of the rowing grip during the drive phase of the rowing stroke conforms to a target feel for a rower. The target feel corresponds to a feel for a rower of a target other rowing exercise machine or other target feel of interest.

The invention discloses a mounting structure of a linear motor eddy current brake plate, which relates to the technical field of linear motor braking and comprises a brake plate, a first connecting piece, a second connecting piece and a mounting seat. The first connecting piece is arranged on the brake plate; the second connecting piece is provided with a first movable part and a second movable part which are hinged to each other, the first movable part and the second movable part can rotate around a hinge shaft to a locking position or an unlocking position, and at the locking position, the second connecting piece is connected with the first connecting piece; the mounting base is provided with a containing cavity, the second connecting piece is inserted into the containing cavity, the containing cavity can keep the second connecting piece at the locking position, and the brake plate is fixed to the mounting base. According to the mounting structure of the linear motor eddy current brake plate, mounting and dismounting between the brake plate and the mounting seat are facilitated, and dependence on a mounting tool can be reduced.

The present disclosure teaches a system for co-planar arrangement of multiple power absorption units for vehicle testing, which is generally used as a dynamometer. The system may include a plurality of power absorption units – for example, two or three eddy current brakes – co-planarly arranged and connected to a shaft via a pulley-and-belt system. The shaft may connect to an axle hub of a vehicle, directly or indirectly. In one embodiment, the shaft may connect to the axle hub via a universal joint coupler and a hub adapter. In some embodiments, each of the eddy current brakes may include a rotor, a plurality of coils surrounding the rotor, and a plurality of brackets attached to the coils. A load cell may be attached to one of the brackets to measure a torque or force. One or more bearings may be attached to the eddy current brakes or the shaft.