591 results about "Regenerative brake" patented technology

A brake torque distribution device for distributing braking torque to wheels of a vehicle includes: a receiving unit for receiving vehicle driving information including required braking torque; a regenerative braking unit for generating regenerative braking torque; a braking torque generating unit for generating braking torque; and a braking control unit for controlling the braking torque generating unit to distribute the braking torque to the wheels of the vehicle, where the braking control unit may determine the braking torque distributed to the braking torque generating unit based on an optimal tire slip diagram stored in memory.

The invention discloses a vehicle braking energy recovery method and device, a vehicle and a storage medium. The method comprises the steps that under the condition that a current vehicle is in a braking mode, the real-time acceleration and the brake pedal depth of the current vehicle are obtained; determining a target deceleration of the current vehicle based on the brake pedal depth; calculating the total required braking force of the current vehicle based on the target deceleration and the real-time acceleration; the maximum value of regenerative braking force of the current vehicle is determined, and the upper limit of the regenerative braking force is obtained; determining a target regenerative braking force based on the total demand braking force and a regenerative braking force upper limit; and the motor output torque of the current vehicle is determined according to the target regenerative braking force, and braking energy recovery is conducted based on the motor output torque. According to the technical scheme, the braking energy recovery efficiency of the vehicle is improved.

A refuse vehicle includes a motor, a battery, a pedal, and processing circuitry. The motor consumes electrical energy transport the refuse vehicle, or is back-driven to generate electrical energy and provide regenerative braking. The processing circuitry obtains an amount of depression from the pedal, and compares the amount of depression to a transition point. In response to the amount of depression of the pedal exceeding the transition point, the processing circuitry uses a linear relationship and the amount of depression to operate the motor to provide a requested amount of acceleration for transportation. In response to the amount of depression of the pedal being less than the transition point, the processing circuitry uses a non-linear relationship and the amount of depression of the pedal to operate the motor to provide a requested amount of regenerative braking.

The invention discloses a load prediction-based regenerative braking electric hoist control method for hot-line work, and relates to the technical field of electric hoist control. The method comprises the following steps: collecting parameters of the electric hoist, and obtaining a predicted load weight according to an LSTM model; adjusting parameters of a PID controller according to the load weight, recording the parameters as initial PID parameters, generating a control signal according to the initial PID parameters, and driving the electric elevator to operate; setting a regenerative braking triggering standard, and judging whether the electric hoist reaches the regenerative braking triggering standard or not; if the electric hoist reaches the regenerative brake triggering standard, monitoring the recovered energy and generating an expected cumulative reward Q; and updating the optimized PID parameter according to the expected cumulative reward Q to obtain an updated PID parameter, and generating a control signal according to the updated PID parameter to control the electric hoist. According to the invention, the reliability of control of the regenerative braking electric hoist based on load prediction for hot-line work is improved.

A power tool is provided including: a tool housing; a motor disposed within the tool housing; a battery receptacle arranged to be coupled to a battery pack having a rated capacity; a power switch circuit disposed between the battery receptacle and the motor; and a controller that controls the power switch circuit to drive the motor. The controller is configured to: determine or receive a pack ID associated with the rated capacity of the battery pack; set a braking profile for electronically braking the motor based on the pack ID; and apply an electronic brake to the motor in accordance with the set braking profile upon detection of an event associated with stoppage of the motor.

The invention discloses a distributed cooperative voltage control method for a hybrid flexible traction substation group, and aims at solving the problems of output voltage cooperation, no-load circulating current suppression and multi-substation load distribution during networking operation of a plurality of hybrid flexible traction substations (HFTSS). Rapid synchronization of output voltage phases of the substations is achieved by introducing an average consistency algorithm, and nearby distribution of train loads among the traction substations is achieved by combining self-adaptive virtual impedance. According to the method, the capacity of the hybrid flexible traction substation for coping with the dynamic change of the external power grid voltage phase can be effectively enhanced, the loss of a contact network is reduced, the regenerative braking energy utilization efficiency is improved, and a feasible path is provided for large-scale application of a low-cost hybrid flexible traction power supply system and improvement of a cooperative control technology system.

The invention discloses an electric automobile sliding energy recovery control method and system, and belongs to the technical field of electric automobiles. The method comprises the steps that the accelerator pedal opening degree at the current moment, the accelerator pedal opening degree at the previous moment, the target automobile speed and the actual automobile speed are obtained; calculating a vehicle speed difference and a pedal opening degree variable quantity; based on the vehicle speed difference, the pedal opening degree variable quantity, a vehicle speed difference threshold value where regenerative braking torque intervenes and a vehicle speed difference threshold value where the regenerative braking torque exits, the braking intention is judged; and based on the braking intention and the rear axle wheel slip rate, the RBCS state switching unit is controlled to be switched among a driving mode, a regenerative braking torque increasing mode, a regenerative braking torque keeping mode and a regenerative braking emergency exit mode. The driving intention can be adaptively recognized, the control parameters are dynamically adjusted, and the safety of complex road conditions is considered.

The invention discloses a regenerative braking energy recovery method combining dynamic planning and model predictive control, which relates to the technical field of vehicle energy conservation, and comprises the following steps: establishing a dynamic model of a vehicle braking process, performing global energy recovery optimization based on dynamic planning, generating a global optimal reference trajectory, and adopting model predictive control rolling optimization. The reference trajectory is tracked to maximize energy recovery efficiency. According to the method, global optimum is guaranteed through dynamic planning, and meanwhile, the energy recovery efficiency of the regenerative braking process is improved by utilizing model predictive control.

The method is applied to the fields of train regenerative braking energy utilization, stray current and rail potential treatment and the like in electrified rail transit, especially urban rail transit. The invention provides a direct-current traction power supply system capable of reducing the energy storage capacity of a super capacitor of urban rail transit, which is combined with a super capacitor energy storage device of the urban rail transit and supplies power to a power electronic device for treating stray current and rail potential by utilizing regenerative braking energy of a train. The super-capacitor energy storage device has the following advantages that on one hand, the energy storage capacity of the super-capacitor bank in the super-capacitor energy storage device between train braking and traction can be reduced, and the utilization efficiency of regenerative braking energy stored by the super-capacitor bank is improved; on the other hand, the problems of stray current, rail potential and the like in the system can be solved from the source, and the power supply distance of a traction substation is remarkably increased. Therefore, the direct-current traction power supply system is of great significance to green and safe operation of urban rail transit.

The invention relates to an electric vehicle regenerative braking stability control method and system oriented to a non-standard road surface. The regenerative braking stability control method in the vehicle emergency braking scene comprises the steps that according to information obtained by a wheel speed sensor, in combination with vehicle parameters and the vehicle speed, processing is conducted through a dynamic model, and the relation between the current slip rate and the optimal slip rate is obtained. And inputting the identified slip rate at the peak attachment state moment as a control reference quantity into a model prediction controller, solving a torque required by motor braking in the controller, inputting the torque into a motor control unit, and performing regenerative braking through an electric driving system. On the basis of identifying the slip rate, the method gets rid of the problem of dependence on a tire model existing in most response-based methods, does not need to consider a tire ground model, damping rigidity and other difficult-to-obtain quantities, is not limited by various information acquired by multiple sensors, and is high in accuracy. And the applicability of the method under different working conditions is improved while the identification method is simplified.

The invention discloses a regenerative braking compound control method for an electronic mechanical braking system, and relates to the technical field of electronic mechanical braking. The defects in the prior art are overcome. The method specifically comprises the following steps: acquiring vehicle state information in real time; calculating a total required braking force and a current required deceleration areq based on a vehicle brake pedal signal; according to the vehicle state information, the currently available maximum regenerative braking force of the regenerative braking system is calculated in real time; calculating a dynamic distribution coefficient K1 based on the required deceleration, the vehicle speed, the wheel sliding rate and a vehicle stability control signal; carrying out braking force distribution according to a preset multi-level threshold strategy; based on the braking force distribution result, regenerative braking target force and compensation braking force instructions of all wheel ends of the EMB are generated; and feedforward-feedback composite control logic is established. The problems that in the composite braking process, braking force distribution is not smooth, switching is paused, and the energy recovery efficiency is not high are effectively solved.

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.

The invention relates to the technical field of power supply, and discloses a humanoid robot modular distributed power supply system which comprises a power supply battery pack, a power management distribution board and a plurality of power utilization modules. The power utilization module at least comprises a control computing power unit, a sensing system, an upper limb joint module, a lower limb joint module and other joint modules; the power management distribution board is electrically connected with the power supply battery pack and each power utilization module. The power management distribution board comprises an MCU control unit, a DCDC power supply unit, a soft start unit, a high-power output unit and a voltage and current detection unit. Through a modular distributed power-on strategy and in combination with soft start pre-charging, voltage and current real-time detection and a regenerative braking absorption unit, voltage and current peaks generated at the moment of power-on of the capacitive high-power load are remarkably suppressed, the risk that a power device is damaged due to overvoltage and overcurrent impact is fundamentally avoided, and the reliability of the power device is improved. And the system reliability and the service life are greatly improved.

The invention provides a vehicle sliding energy recovery method and device, equipment and a storage medium, and the method comprises the steps: obtaining vehicle following parameters of a target vehicle when it is detected that the target vehicle enters a sliding state; the car following parameters are input into a strategy network model used for determining the target regenerative braking torque of a target vehicle motor, so that the target regenerative braking torque output by the strategy network model is obtained; and controlling the target vehicle motor to output the target regenerative braking torque so as to recover the vehicle sliding energy. By adopting the technical scheme provided by the invention, collaborative optimization of the sliding energy recovery efficiency and the driving smoothness is realized.

To improve power efficiency of a synchronous motor in a wide speed range from a low speed to a high speed.SOLUTION: In a pole-number switching method, the current value of AC current supplied to an armature is reduced at low speed by increasing the number of poles and increasing the torque multiplier of the electric motor, thereby reducing copper loss, and loss at high-speed rotation (mainly iron loss) is reduced at high speed by decreasing the number of poles and lowering the voltage and frequency of the AC current supplied to the armature. Furthermore, a further power-efficiency improvement effect is provided by connecting the circuit such that, during driving of the electric motor, inverter power-supply current of an armature winding becomes a power supply for a field winding, and such that, during regenerative braking, current generated from the armature winding is regenerated to a battery efficiently.SELECTED DRAWING: Figure 2

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.

The invention discloses an electric automobile and a torque slope self-adaptive control method and system thereof, and belongs to the technical field of electric automobiles. The method comprises the steps that a driving style recognition signal, the accelerator pedal opening degree variable quantity and the motor target torque are obtained in real time; matching a regenerative braking torque change slope according to the driving style; when the torque of the motor enters a zero-crossing interval, the slope is switched to K1 or K2, and transition is carried out according to a continuous curve; and iteratively calculating the current motor demand torque according to a specific formula. Through stylized slope matching and zero-crossing region cooperative control, the problems of torque sudden change impact, poor driving style compatibility and zero-crossing region gear vibration in a traditional scheme are solved.

The invention belongs to the technical field of new energy automobile transmission gear shifting control, and discloses an AMT gear shifting control method in an electric truck combined braking constant-speed downhill process, which comprises the following steps: judging whether a vehicle enters a combined constant-speed control state or not, and if the vehicle enters the combined constant-speed control state, selecting an AMT gear shifting rule based on a preset AMT gear shifting rule; the AMT optimal gear is obtained according to the current vehicle speed and the required regenerative braking torque, the limitation that only the motor efficiency is considered in a traditional method is broken through, the transmission system and the battery charging and discharging efficiency are synchronously covered, meanwhile, a braking torque cooperative change mechanism is creatively adopted, and the optimal gear is obtained. In the gear shifting process, braking force distribution of the motor and the hydraulic retarder is coordinated according to the preset AMT gear shifting rule, vehicle speed fluctuation caused by power interruption is eliminated, the energy loss and speed control instability risks caused by frequent gear shifting are overcome, driving comfort is guaranteed through gear shifting hysteresis control and the minimum vehicle speed threshold value, and safe and energy-saving closed-loop control is formed.

A system for controlling the operation of an agricultural implement includes a vehicle wheel, a sensor configured to generate data of wheel slip of the vehicle wheel, an implement wheel, and a regenerative braking assembly. The braking assembly includes an energy storage device and an electric motor configured to receive electrical power from the storage device for rotating the implement wheel, and supply power to the storage device. Moreover, the braking assembly includes a regenerative brake configured to rotationally drive the motor such that power is supplied by the motor to the storage device when the brake engages the motor. Additionally, the system includes a computing system configured to determine the wheel slip of the vehicle wheel based on the data generated by the sensor. Furthermore, the computing system is configured to control the operation of the brake to rotationally drive the motor based on the determined wheel slip.

An electrified vehicle includes a human-machine interface to enable towed vehicle mode and specify a desired traction battery charge upon arrival at a destination. A controller is programmed to vary charging rate of the traction battery while the electrified vehicle is being towed over a user-specified distance to the destination to obtain the user-specified target charge for the traction battery upon reaching the destination. The target charge may be entered as a percentage state of charge (SOC), a distance to empty (DTE), or Watt hours, and converted to net energy input required for the traction battery. The controller distributes the charging load over the entire distance to reduce the affect on the drivability and efficiency of the towing vehicle by varying regenerative braking of the electric machine(s) while being towed to provide a net energy needed to obtain the target charge upon reaching the destination.

The embodiment of the invention provides torque control of a vehicle, the vehicle and a computer readable storage medium, and relates to the technical field of vehicles. The method comprises the steps that in response to the fact that the vehicle is in an energy recovery mode, target deceleration is determined based on preset deceleration and a road slope value, and the energy recovery mode is used for converting kinetic energy of the vehicle into electric energy; determining a required braking torque of the vehicle based on the target deceleration and the actual deceleration; a torque control instruction is generated based on the required braking torque and the maximum regenerative braking torque, the maximum regenerative braking torque is the maximum value of the regenerative braking torque provided by the motor, and the regenerative braking torque is the reverse torque generated by the motor when the vehicle decelerates; and controlling the output torque of the motor or the friction brake based on the torque control instruction. The technical problem that the energy recovery performance of a sliding energy recovery system in the prior art is unstable under different slope conditions is solved.

The invention has a purpose of providing a brake system for a straddle-type vehicle capable of improving safety of the straddle-type vehicle during braking. A brake system 100 for a two-wheeled motor vehicle 10 includes: a front-wheel brake mechanism 20 that brakes a front wheel 3; a rear-wheel brake mechanism 40 that brakes a rear wheel 4; and an operation element 11 operated by a rider. The front-wheel brake mechanism 20 includes a friction brake mechanism 21 that generates a friction braking force only on the front wheel 3, and can generate the friction braking force in response to motion of the operation element 11. The rear-wheel brake mechanism 40 does not include a friction brake mechanism but includes an electric motor 5 that generates a regenerative braking force on the rear wheel 4. The front-wheel brake mechanism 20 further increases or reduces the friction braking force by the friction brake mechanism 21 regardless of the motion of the operation element 11.

A battery electric vehicle includes an electric motor as a driving source. The battery electric vehicle includes: a driving operation member that is used to drive the battery electric vehicle; a pseudo shifting operation member imitating an operation member that is used to perform a shifting operation of a manual transmission internal combustion engine vehicle; a processor that controls the battery electric vehicle according to operation of the driving operation member; and an in-vehicle battery that is charged with electrical energy generated when regenerative braking of the battery electric vehicle is applied. The processor executes, according to selection by a driver, a control mode in which operation of the pseudo shifting operation member is associated with torque of the electric motor.

The invention relates to the technical field of elevators, in particular to a material elevator which comprises a cage body and a guide rail assembly, lifting door assemblies are installed at the two ends of the cage body, a guide assembly is fixedly installed on the back face of the cage body, and the guide assembly is slidably connected to the guide rail assembly. The guide rail assembly is fixedly installed on the ground close to the outer wall face of a building. A driving assembly, a speed measuring assembly and a clutch assembly which are in driving connection with the guide rail assembly are mounted on the cage main body; the clutch assembly is in driving connection with a regenerative braking system, the speed measuring assembly is electrically connected with a control system, and the control system is electrically connected with the driving assembly and the regenerative braking system. Through guide rail bidirectional fixing, three-dimensional pulley limiting, counterweight auxiliary door opening, clutch and power generation linkage and intelligent speed control, the effects of more stable and safer equipment operation, convenient operation, wide adaptation, high energy recycling rate and high remote intelligent control efficiency are achieved.

The invention provides a high-speed maglev railway hybrid energy storage optimization method considering regenerative braking uncertainty, and belongs to the field of rail transit train regenerative braking energy recovery. A regenerative braking energy scene set is generated based on WGAN-GP to describe the uncertainty, then a two-stage distribution robust optimization model of the high-speed maglev railway hybrid energy storage system is established, the first stage and the second stage are continuously and alternately optimized until the decision of the first stage meets the requirements of all scenes in the uncertainty set, a column and constraint generation algorithm is adopted to carry out iterative solution, and the robustness of the high-speed maglev railway hybrid energy storage system is improved. The optimal capacity configuration scheme of the hybrid energy storage system of the high-speed maglev railway is obtained by simplifying the solving difficulty of the problem and improving the solving speed of the model. According to the high-speed maglev railway hybrid energy storage optimal configuration scheme considering regenerative braking uncertainty, energy generated in the braking process can be efficiently recycled, configuration of an energy storage system is optimized, the energy utilization efficiency is improved, and the operation cost is reduced.

The invention relates to the technical field of low-carbon intelligent power distribution, in particular to an urban transfer parking lot energy storage optimization method, system equipment and medium, and the method comprises the steps: depicting the load change characteristics of an electric vehicle through the combination of charging modeling and behavior modeling, and constructing a probability model for describing the driving and charging behavior rules; combining the electricity price time period information with a user response mechanism to formulate a charging and discharging strategy under the peak-valley electricity price; on the basis of rail transit regenerative braking energy modeling, an energy docking path with an energy storage system is established, and multi-stage energy release characteristics are defined; constructing a power grid side and track side dual-path energy storage model, setting a path target and performing optimal configuration; carding a resource coordination rule according to a deployment result to form a time sequence structure and a linkage mechanism among multiple energy storage units; multi-source energy coordination control and resource accurate scheduling are realized, the energy efficiency and the response capability of the energy storage system are improved, local consumption of renewable energy sources is promoted, and the low-carbon operation requirement of urban traffic nodes is met.

A regenerative coordination control device is provided with: a replacement control unit (M17) configured so as to execute replacement control for replacing regenerative braking force with friction braking force when regenerative braking force is applied to a vehicle; and a correction unit (M19) configured to execute, when the replacement control is executed, a correction process for correcting a braking force having a high response speed, among the regenerative braking force and the friction braking force, such that the magnitude of the difference between the deceleration of the vehicle and the target deceleration becomes small.

In a control method of an electric vehicle, a target inter-vehicle time, which is a target value of an inter-vehicle time obtained by dividing an inter-vehicle distance of the electric vehicle with respect to a preceding vehicle by the speed of the electric vehicle, is learned on the basis of the accelerator operations, brake operations, speed, and inter-vehicle distance of the electric vehicle, and the regenerative braking force of the electric vehicle is controlled on the basis of the learned target inter-vehicle time.

The present application relates to the technical field of regenerative braking, in particular to a mine truck energy recovery torque rate control method based on vehicle mass and transmission parameters, comprising the following steps: collecting vehicle operation data to construct a time series data set, calculating kinetic energy response sensitivity index and correcting the maximum allowed rising slope, extracting elastic power difference value and oscillation component based on second-order differentiation, and generating torque rate control instruction. In the present application, the influence degree of the current load state of the vehicle on the kinetic energy recovery is quantified, and the maximum allowed rising slope is dynamically corrected accordingly to accurately adapt to different load conditions. The elastic power difference value of the transmission system is extracted by using the second-order differentiation of power, and the oscillation component is separated. When the oscillation is detected to exceed the threshold, the dynamic damping correction value is calculated to down-regulate the limit parameter, which not only ensures the smoothness of torque establishment under heavy load conditions to avoid mechanical damage, but also effectively suppresses the elastic torsional vibration of the transmission system.