707 results about "Traction motor" patented technology

The invention relates to the field of locomotive power battery electric quantity control, and particularly discloses a locomotive power battery electric quantity hysteresis equalization control method, which comprises the following steps that: a traction force exerting mode is reset into an axle load transfer mode, and the initial value of an electric quantity equalization compensation coefficient K is a rack axle load transfer coefficient corresponding to zero speed; judging whether the current mode is a power battery power supply mode; if yes, the TCU receives the electric quantity of a front power battery and the electric quantity of a rear power battery in real time according to the current locomotive working mode, calculates the electric quantity average value difference value, monitors the auxiliary load power and the traction motor power and calculates the power difference value; entering a hysteresis control logic process; calculating a dynamic traction force compensation coefficient, ensuring that the traction force compensation amount is matched with the actual load characteristic of the system, correcting the traction characteristic curve in real time, and dynamically compensating the electric quantity difference of the battery; and performing traction distribution control according to the locomotive speed and outputting corresponding traction.

The invention discloses a traction motor turn-to-turn short circuit fault detection method and device, a medium and equipment. The method comprises the following steps: acquiring a three-phase current signal of a traction motor to be detected; the three-phase current signal is preprocessed; constructing a traction motor turn-to-turn short circuit fault detection model, and training the model; and inputting the preprocessed three-phase current signal into the trained traction motor turn-to-turn short circuit fault detection model so as to detect whether the traction motor to be detected has a short circuit fault or not, and dividing fault grades. The detection precision of the inter-turn short circuit fault of the traction motor can be improved.

The application discloses a control method and device of a vehicle and a storage medium, and belongs to the technical field of vehicle control. The method comprises the following steps: in response to the fault level being a target level and the first detection result indicating that the engine and the ISG motor are in a series working mode, setting the charging target power of the power battery connected in the high-voltage loop to 0, and performing speed closed-loop control on the ISG motor with a speed threshold value as a target speed; in response to the actual torque of the engine being less than 0 and the direct-current bus current being less than a current threshold value, controlling the power battery to be disconnected from the high-voltage loop, performing speed closed-loop control on the engine and voltage closed-loop control on the ISG motor; and supplying power to the traction motor (TM) motor by the ISG motor. The DC bus voltage can be stabilized in the case that the power battery is disconnected, so that the TM motor can stably drive the vehicle to safely travel in the case that the power battery fails.

The utility model discloses an insulating junction box for a traction motor, which comprises a junction box main body and a cover body, and the junction box main body is provided with a motor lead hole and a cable hole; the connection box main body and the cover body are both made of insulating materials, the connection box main body is provided with a first embedded body and a second embedded body, the first embedded body is located at the edge of the connection box main body, and the first embedded body is provided with a first inner screw hole used for installing the cover body; the second embedded body is arranged corresponding to the inner cavity of the connecting box main body, and the second embedded body is provided with a second inner screw hole; and the first embedded body, the second embedded body and the connecting box main body are integrally formed. According to the utility model, the junction box is made of an insulating material, thereby avoiding the large size of the junction box caused by the electrical clearance requirement of a metal junction box, and achieving the small size and light weight design; the first embedding body, the second embedding body, the third embedding body and the connecting box main body are integrally formed, so that a complicated assembling process is avoided, the labor intensity is reduced, and the motor assembling efficiency is improved.

The invention relates to the technical field of rail traffic monitoring, and discloses an urban rail vehicle driving analysis system based on digital twinning, which is characterized in that vehicle vibration and traction motor current signals are collected in real time through a vehicle-mounted sensing unit, and an edge feature extraction unit calculates energy ratio features of a predefined fault frequency band; the data transmission unit transmits the characteristic data and the working condition information to a digital twin platform, a digital fault tree model is arranged in the platform, and a cross-physical domain fault conduction path is analyzed and recognized through multi-source data coupling. Through combination of frequency band energy ratio characteristics and fault tree logical reasoning, electromechanical coupling fault risks which cannot be found by traditional isolated monitoring are effectively captured, meanwhile, a diagnosis threshold value is dynamically adjusted according to the wheel-rail adhesion state, and the diagnosis reliability under the complex working condition is improved.

The invention discloses winding equipment and a method for adjusting the tension of a coiled material. The winding equipment comprises a winding frame, a winding roller and a traction roller, wherein the winding roller and the traction roller are arranged on the winding frame; the winding roller is driven by a winding motor, and the traction roller is driven by a traction motor; a driven roller is further arranged on the winding frame, the driven roller and the traction roller are arranged side by side, and a corresponding coiled material penetrates through the space between the traction roller and the driven roller; the driven roller is driven by a driving device to translate and can be in contact with or away from the traction roller, and the coiled material is extruded when the driven roller is in contact with the traction roller; the surfaces of the traction rollers are made of smooth materials, and the surfaces of the driven rollers are made of rough materials. A tension sensor is further arranged on the winding frame and collects tension signals. Through the cooperation of the traction roller and the driven roller which can be in contact with each other and far away from each other, the equipment has a larger tension control range, and is not only suitable for thinner materials, but also suitable for materials with higher strength and larger thickness.

The invention discloses a hidden danger pre-diagnosis method of an elevator traction system, relates to the technical field of elevator safety monitoring, and is used for solving the technical problems of poor real-time performance, low accuracy and difficulty in defect positioning of hidden danger diagnosis of the elevator traction system in the prior art. The hidden danger pre-diagnosis method for the elevator traction system comprises the steps that multi-source data are synchronously collected, specifically, a current transformer is deployed in a power supply loop at the input end of an elevator traction motor to collect a three-phase current instantaneous value, a speed measurement encoder is used for measuring the speed, the elevator running state, the speed, the floor position and the time-variable load weight are synchronously obtained, and a time-space correlation data set is constructed; signal self-adaptive preprocessing: performing layered noise reduction, working condition alignment and dynamic normalization processing on the acquired current signals; multi-scale feature fusion extraction: current signal features are extracted from a basic feature layer, a time domain feature layer, a frequency domain and a time-frequency domain feature layer; and feature optimization and decision making: after feature screening and dimension reduction fusion, inputting a pre-training classification model to output hidden danger types, positions and risk levels.

A working vehicle includes an electric storage device; a traction motor configured to propel the working vehicle and to generate electrical energy when braking; a hydraulic system including a hydraulic pump driven by a load motor, a hydraulic actuator and a control valve; and a control system. The control system is configured to determine a state of charge of the electric storage device; induce additional load on the hydraulic system by directing the load motor to drive the hydraulic pump and actuating the control valve to direct flow of hydraulic fluid to the hydraulic actuator when the state of charge is at or above a predetermined threshold.

A locomotive comprises a DC power bus, traction motors, batteries, and a charging source, but has no prime mover engine. Each traction motor includes armature and field windings connected in parallel across the DC power bus. The batteries provide power to the DC power bus when in a motoring mode, and receive power from the DC power bus when in a charging mode and a dynamic braking mode. The charging source is connected across the DC power bus to provide charging power to the batteries when in the charging mode. The traction motors also provide charging power to the batteries when in the dynamic braking mode. The power from the charging source is less than the power that would be provided by a prime mover engine. The charging source provides no power to the traction motors when in the charging mode.

The invention relates to a driving dynamics system for a vehicle, comprising at least one wheel brake (RB1, RB2.RB3, RB4) for dissipatively braking a wheel of the vehicle; at least one brake unit (EMB, EHB) assigned to the at least one wheel brake (RB1, RB2, RB3, RB4) and configured to generate a dissipative braking torque by means of the at least one wheel brake (RB1, RB2, RB3, RB4); at least one electric traction motor (TM1, TM2, TM3, TM4) controllable to generate a regenerative braking torque for at least one wheel or axle of the vehicle; and a central control unit (M-ECU domain) which is configured to control the at least one brake unit (EMB, EHB) and the at least one electric traction motor (TM1, TM2, TM3, TM4) for a braking function in combination with one another such that a combined braking torque can be generated by means of the at least one brake unit (EMB, EHB) and the at least one electric traction motor (TM1, TM2, TM3, TM4).The braking function relates to a control case in which a basic braking torque and a controlled additional braking torque are controlled and / or regulated simultaneously; wherein optionally the basic braking torque is generated by the at least one braking unit (EMB, EHB) and the controlled additional braking torque is generated by the at least one electric traction motor (TM1, TM2, TM3, TM4); or the basic braking torque is generated by the at least one electric traction motor (TM1, TM2, TM3, TM4) and the controlled additional braking torque is generated by the at least one braking unit (EMB, EHB); or the at least one braking unit (EMB, EHB) and the at least one electric traction motor (TM1, TM2, TM3, TM4) each jointly generate the basic braking torque and the controlled additional braking torque.

A vehicle control method and apparatus, and a storage medium, which belong to the technical field of vehicle control. The method comprises: in response to the fault level being a target level and a first detection result indicating that an engine and an ISG are in a series operation mode, setting a target charging power of a traction battery to be 0, and performing rotational speed closed-loop control on the ISG by using a first rotational speed as a target rotational speed; in response to an actual torque of the engine being less than 0 and the current of a direct-current bus being less than a current threshold value, controlling the traction battery to disconnect from a high-voltage loop, performing rotational speed closed-loop control on the engine, and performing voltage closed-loop control on the ISG; and supplying power to a traction motor (TM) by means of the ISG. Therefore, the stability of the voltage of a direct-current bus can still be ensured when a traction battery is disconnected, thereby ensuring that a TM can still stably drive a vehicle to safely travel when the traction battery has a fault.

A method for controlling torque generated by at least one traction motor of a vehicle before a vehicle launch includes: determining that torque demand increases while simultaneously at least one brake of the vehicle is in an applied state; in dependence on the determination, limiting torque generation by the traction motor in response to torque demand; and removing the limit in dependence on release of the at least one brake.

A method includes receiving an indication of a charging current received at an on-board charging circuit of a vehicle from a source having a charging voltage. The on-board charging circuit includes a multi-phase traction motor, an inverter electrically coupled to the multi-phase traction motor and including an upper set of switching elements and a lower set of switching elements, and an energy storage device (ESD) electrically coupled to the inverter and having a storage voltage. The method includes determining whether the charging voltage is greater than or equal to the storage voltage. When the charging voltage is greater than or equal to the storage voltage, the method includes instructing at least one switching element in the upper set to operate in an on state and all of the switching elements in the lower set in an off state to cause fast charging of the ESD using the charging current.

A system and method for a hybrid electric axle. The hybrid electric axle system, in one example, includes an engine interface assembly with a one-way clutch that is rotationally coupled to an input shaft and a gear shaft in a gear set that is rotationally coupled to a differential and a dog clutch configured to selectively rotationally couple the input shaft and the gear shaft in the gear set. The hybrid electric axle system further includes an electric drive assembly including a traction motor that is rotationally coupled to a gear train. In the electric axle system, the gear train is rotationally coupled to the differential and the engine interface assembly and the electric drive assembly are packaged in an axle housing.

The invention relates to the technical field of welding equipment, and discloses multi-station linkage railway traction motor end cover welding equipment which comprises a machining table and a rotating table rotationally installed above the machining table, and a plurality of clamps used for limiting a machine shell and an end cover are arranged above the rotating table. A first support is fixedly connected to the top of the machining table, a first air cylinder is fixedly arranged at the top of the first support, an I-shaped rotating piece is fixedly arranged at the driving end of the first air cylinder, a welding mechanism capable of horizontally moving and rotating is arranged on the lower side of the I-shaped rotating piece, and collecting assemblies are installed on the inner side and the outer side of the machine shell. The collecting assembly comprises a dust collection head, an inner cylinder and an annular intercepting plate. The machine shell and the end cover are sequentially rotated to the welding mechanism station to be subjected to inner and outer double-layer welding and then rotated to the detection assembly station to be subjected to quality detection, automatic welding and detection of the traction motor end cover are achieved, and chippings can be automatically collected during welding.

The invention relates to a method for active dynamic braking of an elevator system (100). The method includes detecting (310) a dynamic braking condition, acquiring (320) speed data representative of a speed of the elevator car (102), and activating (340) an active dynamic braking operation for dynamically braking movement of the elevator car if the acquired speed data indicates (330) that the speed of the elevator car reaches a predetermined monitored speed level. The active dynamic braking operation includes operating a motor inverter of an elevator drive unit of an elevator system by switching a high-voltage side switch and a low-voltage side switch of the motor inverter in a controlled manner such that a rotating field is generated in a stator winding of a traction motor, therefore, the rotation of the traction motor is dynamically braked, and the movement of the elevator car is braked. The invention also relates to an elevator drive unit, an elevator system, a computer program and a computer readable storage medium.

A locomotive has DC or AC traction motors, powered by a hydrogen fuel cell, and optionally other sources such as regenerative braking. The traction motors of the locomotive may be connected to a set of independent DC choppers or AC inverters, linked via a common DC bus, configured to regulate power from the one or more power sources. A manager module, among other functions, may receive inputs and signals to coordinate delivery of electricity from the sources to the motor. A method for retrofitting a legacy locomotive may include removing a generator and a control apparatus configured for diesel fuel, and installing a kit of apparatus configured to be powered by a hydrogen fuel cell. A railway system for use by locomotives powered by hydrogen has one or more hydrogen-generation stations deployed near a track of the railway system.

A method of operating an EV in one of various states provides an inverter control system having a high voltage circuit powered by a high DC voltage power source; a low voltage circuit powered by a low DC voltage power source that is substantially less than the voltage of the high voltage power source, the low voltage circuit being configured to power a microcontroller; and an inverter circuit having a plurality of high side switches and a plurality of low side switches, the inverter circuit being configured to deliver AC power to a traction motor. Upon powerup of the high voltage circuit and with the low voltage circuit being unpowered, the method establishes an emergency tow state with each of the high side switches and each of the low side switches being open permitting the EV to be towed without damaging the motor.

The invention relates to a disengagement device, in particular to a mechanical disengagement device for a subway gear box, and solves the problems that according to an existing speed reducer dynamic disengagement device, when inner teeth of a gear sleeve are combined with outer teeth of combination teeth, a synchronous ring is used for a long time, friction force is reduced, and the failure rate is increased. The outer spline section is arranged on the axle, the out-of-gear sliding sleeve is meshed with the outer spline section of the axle through the inner spline on the inner wall and is in sliding fit with the axle in the axial direction, and when the traction motor breaks down, the shifting fork is driven by the executing mechanism to shift the out-of-gear sliding sleeve, so that the outer spline of the out-of-gear sliding sleeve is separated from the inner spline of the sliding groove of the driven gear; at the moment, torque is input from the axle and transmitted into the out-of-gear sliding sleeve, the out-of-gear sliding sleeve is not meshed with the driven gear any more, the driven gear is only rotationally connected with the axle, torque transmission is interrupted, the structure is simple, meshing of the out-of-gear sliding sleeve and the driven gear does not need a synchronizing ring, and fault points are reduced.

The invention discloses a traction motor bearing fault online detection method and system, a medium and equipment. The method comprises the steps that S1, a working condition signal and a leakage current signal of a traction motor under a stable working condition are acquired; s2, performing adaptive decomposition on the leakage current signal, and capturing a sensitive mode corresponding to the state change of the bearing, namely a corresponding high-frequency mode component of the traction motor bearing in the leakage current signal; s3, extracting a peak-to-peak value Apeak of a main wave crest in the high-frequency modal component time domain waveform, a fluctuation period Ta, a resonant frequency fc of a high-frequency modal component frequency spectrum and energy Ef corresponding to the resonant frequency fc; and S4, inputting the Apeak, Ta, fc, Ef and working condition signals into a pre-constructed and trained bearing fault multi-feature fusion diagnosis model, and outputting a motor bearing diagnosis result. The method has the advantages that the fault features of the motor bearing can be effectively and sensitively obtained, and accurate traction motor bearing fault early warning is achieved.

The invention relates to the technical field of rail transit equipment fault diagnosis, and discloses a lightweight traction motor fault diagnosis method and system.The method comprises the steps that a high-precision fault diagnosis teacher model can be obtained by training a fault diagnosis teacher model composed of a feature extractor and a classifier; the fault diagnosis student model is trained by combining the dynamic adjustment of the sample uncertainty and the multi-factor driven adaptive distillation coefficient, so that the parameter quantity, deployment cost and reasoning time delay of the fault diagnosis student model can be remarkably reduced while the same fault diagnosis precision as that of a fault diagnosis teacher model can be ensured. The method is easy to implement, extra hardware equipment is not needed, and the running state health monitoring level of the traction motor and the rail transit vehicle in a resource limited scene can be effectively improved.

The invention belongs to the field of rail transit traction motor electric variable measurement and fault diagnosis, and particularly relates to a traction motor fault diagnosis method based on RPSO-VMD-CatBoost. Comprising the steps of collecting a traction motor current signal, adaptively optimizing key parameters # imgabs0 # and alpha in a VMD algorithm by using an improved particle swarm optimization algorithm, optimizing an IMF component, extracting a fault feature frequency, extracting time domain features for an original electric signal, optimizing hyper-parameters of a CatBoost classifier, performing model training and the like. According to the method, the RPSO is adopted to optimize the VMD hyper-parameter, the influence of the parameter on feature extraction is reduced, the effective frequency domain feature of the signal is extracted at the same time, the accuracy of fault diagnosis is improved, and a theoretical support with higher credibility can be provided for fault diagnosis of the railway vehicle traction motor in the actual operation process.

The utility model discloses an angle module for traction and steering of a wheeled robot, which relates to the technical field of robot running parts, and comprises a vehicle body bracket and tires at four corner ends, a mounting shell is arranged above the tires, an angle module is arranged on the side of the tires, and the angle module comprises a traction module and a steering module. A traction motor in the traction module is connected with a traction rotating shaft through a speed reducer, a driving shaft and other parts to drive tires to rotate, and the axis of the traction driving shaft is coplanar with tire landing points; the steering module achieves steering through a steering motor and other components. The vehicle body support comprises a central framework, a bridge frame and modular bridges, one modular bridge is connected with the weeding module, and the other modular bridge is provided with a self-adaptive suspension and a suspension optical axis. The angle module solves the problems of power transmission, steering performance, structural stability and the like of an existing angle module, and has the advantages of being efficient, flexible, stable, universal, good in environmental adaptability and the like.

The invention relates to the field of industrial vehicle control, in particular to a forklift driving direction control method and system and mechanical equipment. The system comprises a signal acquisition unit, a control unit, an execution unit and a display unit. And a gear handle switch and an electronic level meter of the signal acquisition unit respectively acquire a gear signal and a vehicle body inclination angle signal. A vehicle controller and a motor controller of the control unit dynamically adjust direction switching speed threshold values according to the signals and preset logic, a first threshold value group is adopted during reversing, a second threshold value group is adopted during rampway, and a third threshold value group is adopted under other conditions. A traction motor of the execution unit adjusts the steering direction according to signals of a motor controller. The display unit can be configured with parameters such as a speed threshold value and a ramp triggering angle. According to the control method, the speed threshold value is dynamically adjusted by detecting gear signals and the vehicle body inclination angle, and direction control is achieved. The problems that in the prior art, due to the fact that the speed set value is fixed, reversing impact is large, and hill starting is difficult are solved, and the driving comfort and safety are improved.

The invention relates to the technical field of property management, and provides a coordination control method and device for multiple motor devices in property elevator management and a storage medium. The method comprises the following steps: S1, collecting real-time people flow data and motor operation state data; s2, generating fusion data with a structured metadata format; s3, constructing a distributed passenger flow prediction model in the building, and outputting a predicted passenger flow demand matrix of each region in a future period; s4, generating a collaborative scheduling instruction for the elevator traction motor cluster; and S5, the elevator traction motor cluster is controlled according to the collaborative dispatching instruction. The device comprises a data acquisition module, a data fusion module, a passenger flow prediction module and a control execution module which are used for executing the method. A computer program is stored in the storage medium, and the method is implemented when the computer program is executed by a processor. Furthermore, the overall optimization of the transportation efficiency, the energy consumption management and the user experience is realized.

The present application relates to the technical field of engineering machinery, and provides a coal winning machine posture adjusting device, an adjusting method and a coal winning machine. The coal winning machine posture adjusting device comprises a swing-to-walking mechanism, a direction adjusting mechanism and a control system. The swing-to-walking mechanism is arranged on the coal wall side of the coal winning machine body and is in contact with the bottom surface of the roadway to assist the walking of the coal winning machine body. The direction adjusting mechanism is used to drive the swing-to-walking mechanism to turn and drive the coal winning machine body to turn. The control system is in communication connection with the swing-to-walking mechanism, the direction adjusting mechanism and the posture detection mechanism of the coal winning machine body. The control system controls the swing-to-walking mechanism and the direction adjusting mechanism to act according to the detection signal of the posture detection mechanism. The control system can control the swing-to-walking mechanism and the direction adjusting mechanism to act according to the detection signal of the posture detection mechanism, adjust the walking posture of the coal winning machine body, reduce the additional friction force between the walking wheels of the coal winning machine and the pin rows of the scraper, reduce the output current of the traction motor and accelerate the walking speed.

The invention discloses a coiling tension control method, device and system for a steel wire calender. The coiling tension control method comprises the following steps that the coiling thickness of a mandrel rubber sheet of the calender, the height of the rubber sheet stored by a cloth storage frame and the tension borne by a product in the coiling process are obtained; judging the working mode of the production line based on the height of the stored film of the cloth storage rack; adjusting proportional gain and integral gain in a PID (Proportion Integration Differentiation) control controller according to the speed ratio range of a coiling motor and a rear traction motor under the working mode of the production line on the basis of the preprocessed coiling thickness information of the calender mandrel film and the tension of the product in the coiling process; the rotation speed ratio of the coiling motor to the rear traction motor in different working modes of the production line is obtained, and then the actual speed of the coiling motor is obtained; and on the basis of the actual speed of the coiling motor, the speed difference between the coiling motor and the traction motor is controlled, and then control over constant tension in the steel wire rolling and coiling process is achieved.

The invention relates to a method for operating a work machine in order to simulate creep with the work machine. The work machine has an electric machine (2) as a traction motor. The method has a step of detecting (20) a position of a driver-operated element (8) of the work machine. The method has a step of determining (22) a creep torque depending on the position of the driver-operated element (8). As the position of the driver-operated element (8) increases, a smaller creep torque is determined, wherein the creep torque is greater than zero when the driver-operated element (8) is in a zero position. The method has a step of determining (24) a driving torque depending on the position of the driver-operated element (8). In addition, the method has a step of controlling (26) the electric machine (2) depending on the determined creep torque and the determined driving torque. The invention furthermore relates to a control device (18) and to a work machine having the control device (6).

A panel pouring slip form construction method, comprising the following steps: 1) bottom mold installation; 2) concrete pouring; 3) traction motor traction slip form panel; 4) the first pouring block is vibrated and troweled; 5) traction mold advances, forming a secondary pouring area; 6) repeating steps 2) to 5), completing the secondary pouring operation; 7) repeating steps 2) to 6), completing the slope protection slip form pouring construction. The application adopts the above method, which can solve the problems of poor stability of the slip form, influence of the concrete floating force on the construction and complicated control of the traction mechanism control system in the prior art, and realizes more convenient and stable panel pouring slip form construction.

A hybrid drive system (200) for a work machine (100) includes a drive system (202). The drive system (202) includes an engine (204) that generates a first energy supply. The drive system (202) also includes a generator (206) mechanically coupled with the engine (204) to drive the generator (206). The drive system (202) further includes a battery system (208) that generates a second energy supply. The drive system (202) includes a motor generator unit (210) mechanically coupled with the generator (206) to drive the generator (206). The motor generator unit (210) is driven by the battery system (208). The hybrid drive system (200) also includes a controller (216) communicably coupled with the drive system (202). The controller (216) is configured to control the drive system (202) to direct, towards one or more traction motors (110, 112) of the work machine (100), a portion of at least one of the first energy supply via the generator (206) and the second energy supply via the motor generator unit (210) and the generator (206).