31 results about "Eddy current brake" patented technology

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 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 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.

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).

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 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.

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.

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.

This invention provides an eddy current retarder braking system and method based on distributed stator coils, relating to the field of vehicle auxiliary braking system technology. The system adopts a three-layer collaborative architecture of physical integration, state awareness, and intelligent execution. The physical integration layer constructs a highly reliable hardware foundation through deep coupling of distributed fault-tolerant windings, high thermal conductivity insulation structures, integrated liquid cooling heat dissipation structures, and vibration-resistant mechanical interlocks. The state awareness layer collects real-time electrical, thermal, and mechanical data from a multi-sensor array. The central processing unit of the intelligent execution layer, based on multi-sensor data fusion and intelligent algorithms, achieves millisecond-level fault isolation, dynamic optimization of thermal management, and predictive early warning of risks. This invention realizes a fundamental transformation of the eddy current retarder from a passive execution component to an active safety system, completely solving the core pain points of traditional products such as severe thermal decay, single-point failure, and difficult maintenance.

The application discloses a magnetic levitation train brake control method and device and a computer readable medium, wherein the method comprises the following steps: acquiring an excitation current of an eddy current brake electromagnet and a running speed of the magnetic levitation train; determining an electromagnetic gap between the eddy current brake electromagnet and a lateral track according to the excitation current and the running speed; determining an eddy current brake force generated by the eddy current brake electromagnet and a wear plate friction force between a wear plate of the eddy current brake electromagnet and the lateral track according to the excitation current, the running speed and the electromagnetic gap; determining a skid friction force between a skid and the track according to the running speed; determining a train brake force according to the eddy current brake force, the wear plate friction force and the skid friction force, and performing brake control on the magnetic levitation train according to the train brake force. The application determines the brake force of the magnetic levitation train by combining the influence of the dynamic electromagnetic gap on the brake force, is more in line with the actual situation of train braking, effectively reduces the calculation error of the train brake force, and accordingly improves the accuracy of the train brake control.

This application provides an eddy current braking electromagnet module with guiding function, a guiding braking system, and a vehicle, relating to the field of conventional magnetic levitation technology. The electromagnet module includes multiple first magnetic poles and a controller. Each first magnetic pole includes a first magnetic pole section and a second magnetic pole section. Based on functional requirements, the controller controls the polarity of the first and second magnetic pole sections to achieve braking or guiding functions. Thus, this braking electromagnet module can integrate guiding and braking, thereby achieving weight reduction. Furthermore, the polarity of the first and second magnetic pole sections can be controlled, and the distribution of eddy current braking force can be controlled, preventing concentrated braking force during emergency braking and potential damage to the vehicle structure.

The invention relates to an electric machine (24) comprising at least one disc-shaped rotor (58, 60) received on a shaft (52). The at least one disc-shaped rotor (58, 60) is provided with a brake disc (54) of an eddy current brake (22) on one side. The invention also relates to the use of the electric machine (24) with at least one integrated eddy current brake (22) as a central brake on a front axle (12) and / or a rear axle (38) of an electrically operated vehicle (10).

An electric motor braking system 10 (e.g., as part of an eddy current brake) includes an electric motor 11 comprising: a casing 12, a stator 13 and a rotor 14, each of the rotor and stator having a re

The invention relates to a method for calculating and / or estimating the temperature of an eddy current brake (12), in particular a brake drum (20) and / or a brake disc (22) and / or a stator, comprising the following method steps: a) Calculation of a current temperature T akt of excitation coils of the eddy current brake (12) and b) sensorless estimation of the temperature of at least the brake disc (22) from calculated temperature gradients of the excitation coils of the eddy current brake (12) and measured currents I ECB , stresses U ECB and rotational speeds of the eddy current brake (12). Furthermore, the invention relates to the use of the method for temperature determination and / or estimation on eddy current brakes (12).

The utility model relates to a track sliding pipe device with a permanent magnet eddy current braking mechanism, which comprises a track, a permanent magnet eddy current braking mechanism, a permanent magnet eddy current braking mechanism, a permanent magnet eddy current braking mechanism and a permanent magnet eddy current braking mechanism, and the permanent magnet eddy current braking mechanism is arranged on the permanent magnet eddy current braking mechanism. The tackle comprises a tackle body and tackle braking assemblies arranged on the two sides of the tackle body, each tackle braking assembly comprises mounting seats which are oppositely arranged, the mounting seats are sunken inwards from the opposite faces to form mounting grooves, magnets are fixed in the mounting grooves, a distance is formed between the magnets, and the distance is larger than the thickness of the braking plate; based on electromagnetic induction and the Lenz's law, eddy current is generated through relative movement of the magnet and the aluminum brake plate to achieve braking, kinetic energy is converted into heat energy, and compared with traditional schemes such as rubber sheet friction braking and spring pressurization braking, the non-contact characteristic eliminates mechanical abrasion, and the service life of equipment is remarkably prolonged.

The utility model discloses a device for testing the service life of a linear motor, and belongs to the technical field of motor testing. The device mainly comprises a test board, the upper end of which is provided with a fixed plate; the eddy current brake is mounted at the upper end of the fixing plate; the torque rotating speed sensor is connected to one side of the eddy current brake; the coupling is matched with the other side of the torque and rotating speed sensor, and the coupling is used for installing and connecting a motor to be tested; the clamping mechanism is arranged on one side of the test board, the clamping mechanism is provided with a placement seat, vertical plates are installed on the two sides of the upper end of the placement seat, and a clamping plate is slidably connected to the upper end face of the placement seat; and the adjusting mechanism is arranged below the clamping mechanism. According to the linear motor service life testing device, the fixing seat does not need to be frequently replaced manually, manpower and material resources are reduced, and the testing time of each motor is also saved.

The invention relates to a braking device (200), to a vehicle (42) having a braking device, and to a method for generating a total braking torque, comprising an eddy current braking device (10), an energy storage device (24), and an electric machine (46, 48), which is connected to the energy storage device (24). The eddy current braking device (10) has a stator part (12), a rotor part (16) with a shaft (18), and an actuator device (10, 28, 32). The stator part (12) comprises an exciter device (22) for generating a primary magnetic field, and an induction device induces eddy currents, whereby a first braking torque (120,122) can be generated. The actuator device (10, 28, 32) generates a force (30, 34) by means of which the rotor part (16) and the stator part (12) are displaced relative to each other, and a second braking torque (120,122) is generated by the stator part (12) and the rotor part (16) contacting each other. The eddy current braking device (10) and / or the electric machine (46, 48) are temporarily coupled to at least one wheel (44) of the vehicle (42).

The invention relates to a soft starter controllable turn-off and conversion capability testing device and method, and belongs to the technical field of soft starter testing. The device comprises a power supply system, a loading system, a measuring system and a control system, the power supply system comprises an external three-phase power grid and a voltage regulator, and the input three-phase power supply is stably and continuously regulated to a corresponding output voltage range through the voltage regulator; the loading system comprises an accompanying test motor and an eddy current brake and is used for simulating actual load characteristics of the motor; the measurement system comprises a plurality of temperature sensors, a leakage current measurement sensor and a motor operation parameter measurement sensor, and is used for collecting and recording physical quantities in the whole test process; the control system comprises a plurality of contactors and a controller, and an automatic testing process is realized through the controller. According to the method, the test process is automatically executed based on the device, human intervention is reduced, the test efficiency is improved, and standardization, accuracy and repeatability of the test process are ensured.

The utility model relates to the technical field of engine test, concretely is a motorcycle power loading detection platform, the utility model discloses through the cantilever crane movement in place and put into the engine slide, press down and hold button, left side automatic holding mechanism and right side automatic holding mechanism move to the inside simultaneously, stop after moving to the limit, and then engine positioning slide moves to the inside, stop after moving to the limit, left side automatic holding mechanism and right side automatic holding mechanism begin to automatically clamp, complete and hold work after in place, manually rotate and pull flexible butt joint and butt joint engine's output countershaft, the load capacity of real -time road of the braking force of eddy current brake according to the numerical value inside the preset in host computer system adjusts its current size simulation, and different engines correspond to different current, according to the different current size and let eddy current brake produce different braking force, produce load force to engine, and begin to test the performance parameter of engine.

The invention relates to the technical field of drilling box testing, and discloses a drilling box testing platform and a testing system thereof, and the drilling box testing platform comprises a drilling box testing platform and special industrial equipment for testing, verifying and evaluating the performance of a drilling box; the control and acquisition unit comprises an industrial computer and a rotating speed and torque power acquisition instrument; the sensor group is used for collecting physical parameters in the testing process and at least comprises a rotating speed and torque sensor, a flow sensor, a pressure sensor and a temperature sensor; and the program control load unit comprises a program control loading power supply and an eddy current brake and is used for applying an adjustable load to the drilling box test platform according to the control instruction. According to the drilling box test platform and the test system thereof, standardization test and simulation test are organically combined, so that instant performance parameters of the drilling box under a specific working condition can be obtained, and a prediction model can be constructed based on historical data and field return visit information; therefore, prospective evaluation is carried out on the long-term operation reliability and durability of the drilling box.

The invention discloses an electric scooter brake structure which comprises a side frame fixedly connected to one side of a wheel carrier at the tail of an electric scooter, a mounting round seat is fixedly connected to the side frame, a hollow column is fixedly connected to the mounting round seat, and a conductive brake disc is fixedly connected to the end, close to the side frame, of a wheel axle of the electric scooter. A movable lantern ring is slidably connected to the hollow column, a brake disc is fixedly connected to the outer surface of the movable lantern ring, and a plurality of evenly-distributed mounting notches are formed in the brake disc; the position of the brake disc can be controlled through the arranged control mechanism, non-contact brake or friction brake is achieved by pinching the amplitude of the brake handle, speed reduction is achieved through non-contact eddy current brake in a conventional brake scene, the abrasion speed of the conductive brake disc and the brake disc can be effectively reduced, and the service life of the brake disc is prolonged. The service life is greatly prolonged, and the frequency of replacing brake components is reduced.

The invention discloses a PGK intelligent control method and system, and belongs to the technical field of precise guidance, and the control method comprises the steps: driving a steering isolation ring and a PGK body to generate same-direction relative rotation motion; the controller calculates the absolute rotating speed of the PGK body and the target absolute azimuth angle of hovering of the steering isolation ring in real time based on a magnetic modulation-rotating speed calculation model; on the basis of an eddy current braking torque model, eddy current braking torque opposite to the rotation direction of the steering isolation ring is generated by adjusting the excitation current of the micro eddy current excitation coil array; and by controlling the eddy current braking torque, the eddy current braking torque and the torque acting on the steering isolation ring are dynamically balanced, so that the steering isolation ring is stabilized at the target absolute azimuth angle. According to the PGK control system, a traditional motor-speed reducer mechanical transmission mode is completely replaced with an electromagnetic non-contact mode, the problems of mechanical abrasion, response delay and poor environmental adaptability are fundamentally solved, and structure simplification, performance improvement and high reliability of the PGK control system are achieved.