673 results about "Regenerative brake" patented technology

The invention provides a regenerative braking-based dynamic energy distribution method for a new energy automobile, which belongs to the technical field of braking systems and comprises the following steps: step 1, determining the total braking force currently required by the automobile, and further determining the distribution proportion of mechanical braking and regenerative braking; 2, evaluating the current acceptable charging power of the battery and the feedback power range of the motor, and further determining limit data of regenerative braking energy distribution; 3, the optimal regenerative braking force and mechanical braking force distribution proportion under the current working condition is determined; 4, the optimal regenerative braking force distribution proportion is converted into a regenerative braking force instruction, then a motor is controlled to generate corresponding regenerative braking torque based on the regenerative braking force instruction, the vehicle is braked, and energy is recycled; and 5, the mechanical braking force distribution proportion is converted into a mechanical braking force instruction, and then a mechanical braking device is controlled to generate corresponding braking force based on the mechanical braking force instruction. And more accurate brake control and energy management are realized.

The embodiment of the invention provides a vehicle energy recovery control method and device, a medium and a vehicle, and relates to the technical field of brake control. The method comprises the steps that a braking request of a target vehicle is responded, and current braking judgment parameters of the target vehicle are obtained; under the condition that it is determined that the target vehicle meets the preset energy recovery condition based on the current braking judgment parameters, the vehicle operation parameters are input into an intelligent decision-making model, and a braking force distribution strategy result is obtained; based on the braking force distribution strategy result, braking control is conducted on a motor control system and a braking system; the motor control system is used for providing regenerative braking force and generating recovery energy suitable for supplementing energy to the power battery. According to the embodiment of the invention, the vehicle operation parameters collected in real time are input into the self-adaptive adjustment intelligent decision-making model, and the braking force distribution strategy suitable for the current operation condition can be output, so that the accuracy and adaptability of braking force distribution are effectively improved.

The invention relates to the technical field of vehicle braking control, and discloses a vehicle braking control system based on a high-speed permanent magnet synchronous motor, which comprises a state sensing module, a braking force calculation module, a braking force control module and a braking force control module, the torque distribution module distributes the total braking torque into a predictable regenerative component and a precisely matched friction component, a deterministic regenerative braking force datum line is established, a braking system is converted into stable output control from passive response energy fluctuation, and linear mapping of pedal travel and deceleration is achieved; and meanwhile, by combining road bumping degree perception and model online correction, the output stability is kept under the complex working condition, and the technical problem that energy recovery and control quality in a hybrid braking system are difficult to consider at the same time is solved.

The invention relates to the technical field of intelligent control, and particularly discloses a servo control method and a servo control system for a fast door, and the method comprises the following steps: a multi-modal data fusion step: collecting a mechanical state, an environment parameter and system health data, and constructing a multi-dimensional state vector; a self-adaptive control step: dynamically generating control parameters based on fuzzy PID and a deep learning model; a multi-stage energy consumption optimization step: switching a control strategy according to the operation stage of the door body, and introducing a regenerative braking and energy efficiency optimization algorithm; and a fault self-healing step: realizing control switching in an abnormal state through sensor redundancy and actuator backup. Compared with traditional single closed-loop control, the positioning precision is improved, and the anti-interference capability is improved through fusion of the mechanical state and the environmental data.

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.

The invention provides an energy optimization type motion control system for an unmanned factory, belongs to the field of unmanned factory control, and solves the problems of low motion control integration efficiency, poor transfer precision, poor energy distribution effect and the like of an existing unmanned factory. Comprising a load detection module, a self-adaptive control module, a regenerative braking module, a cooperative scheduling module, an Internet of Things communication module, a positioning detection module, a path planning module, an intelligent decision and optimization module, a safety and fault tolerance module, a man-machine interaction and monitoring module and a stacking machine, a movable frame mechanism is arranged between the ground rail and the sky rail, a cargo carrying table mechanism is arranged on the movable frame mechanism in a transmission mode, a lifting transverse movement fine adjustment mechanism is arranged at the upper end of the cargo carrying table mechanism, a rotating position fine adjustment mechanism is arranged at the upper end of the lifting transverse movement fine adjustment mechanism, and a telescopic fork plate mechanism is arranged at the upper end of the rotating position fine adjustment mechanism. According to the system, multiple modules are intelligently integrated for cooperative work, energy distribution is optimized, and the three-dimensional space pallet forks are accurately aligned with the goods locations.

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 travel control device for a hybrid vehicle includes: an acceleration control part for controlling a traveling motor generator or an engine based on a depression amount of an accelerator pedal; and a regenerative control part for controlling the traveling motor generator with a regenerative control intensity set by an operation part. The acceleration control part includes: an EV priority control portion for prioritizing EV traveling over engine traveling. The regenerative control part includes: a restriction portion for restricting or prohibiting regenerative braking; and a forced regeneration portion for performing regenerative braking on a driving wheel and rotationally driving a power generation motor generator by electricity generated in the traveling motor generator to rotationally drive an engine, if the regenerative braking intensity is increased by the operation part in a state where the restriction portion restricts or prohibits the regenerative braking. The acceleration control part deselects an EV priority mode if the regenerative braking intensity is increased by the operation part in a state where the EV priority mode is selected and acceptance of electricity to the driving battery is restricted.

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.

A driving dynamics system for a vehicle may include at least one wheel brake for dissipative braking of a wheel of the vehicle; at least one braking unit associated with the at least one wheel brake and designed to generate a dissipative braking torque via the at least one wheel brake; at least one electric traction motor controllable to generate a regenerative braking torque for at least one wheel or axle of the vehicle; and a central control unit configured to control the at least one brake unit and the at least one electric traction motor for a braking function in combination such that a combined braking torque is generated by means of the at least one brake unit and the at least one electric traction motor. The braking function relates to simultaneous control of a basic braking torque and a controlled additional braking torque.

Braking system with: a hydraulic brake device for generating a friction braking force comprising a pedal (16), at least one brake caliper (21a - 21d) a main pressure generating device (200) with a main cylinder (212) and a piston (251) which pressurizes the main cylinder (212), a wheel pressure generating device (300) for generating a hydraulic pressure in the at least one brake caliper (21a - 21d); and a regenerative braking device (18) and a brake control device (100) for calculating a braking force distribution between friction brakes and regenerative braking, wherein the braking system is configured to adjust a total braking force (Ft) based on a pedal reaction force and a displacement amount of the piston (251) that pressurizes the master cylinder (212), or adjust the total braking force (Ft) based on the pedal reaction force and the generated hydraulic pressure in the at least one brake caliper (21a - 21d) to keep the total braking force (Ft) at a constant level when transitioning from regenerative braking to friction braking in response to a reduction in vehicle speed.

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 discloses a safety performance test and evaluation method for a regenerative braking system of an electric vehicle, which comprises the following steps: firstly, selecting a test road and a road adhesion coefficient according to test requirements, and setting a test environment, an initial braking speed, a braking position and a vehicle state; and a corresponding braking mode can be selected according to a regenerative braking system carried by the tested vehicle. Then, the test vehicle can be placed on the test road with the selected road adhesion coefficient, the test vehicle is started to run along the test road, and when the test vehicle runs to the braking position and the vehicle speed reaches the set braking initial speed, the regenerative braking system is started, and the test vehicle is controlled to brake according to the set braking mode. And finally, detecting various test data in the braking process of the regenerative braking system in real time through various test devices arranged on the test vehicle, and evaluating the influence on the safety performance of the vehicle in the braking process of the regenerative braking system of the electric vehicle through the test data.

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.

The invention discloses a braking method and system of a single-pedal electric vehicle based on intention recognition, and relates to the technical field of electric vehicle braking control. According to the method, dual fuzzy control is designed for the target electric vehicle to determine the braking intensity, the braking intention of a driver is accurately reflected, then braking strategies under different working conditions are designed according to the braking intensity so as to meet the braking requirement of the driver, flexibility is high, and the use effect is good. When regenerative braking is adopted for the rear wheels, linear model predictive control is used for solving the longitudinal dynamic model of the whole vehicle, combined control is conducted on the acceleration, the jerk and the rear wheel slip rate, the requirement of a driver for the current dynamic property of the vehicle is met, it is guaranteed that the vehicle can achieve the ideal braking effect, and the driving safety is improved. Meanwhile, vertical vibration is restrained, the jolting feeling of a driver during riding is reduced, the riding comfort is improved, safety is considered, and the dangerous conditions such as wheel slipping or locking in the braking process are effectively prevented.

The invention relates to a braking control method for a distributed torque electric vehicle, a medium and equipment. The method comprises the steps that a control model of wheel rotation dynamics is established according to a vehicle resistance model and a longitudinal dynamics model, and regenerative braking torque of the electric vehicle is established according to the control model of the wheel rotation dynamics; a driving motor model of the vehicle is established, the regenerative braking torque of the electric vehicle serves as input of the driving motor model, and energy recovery of a driving motor is obtained; a braking system is improved based on motor braking force, and braking torque needed by a vehicle is distributed through energy recovery of a driving motor; and adjusting the braking torque of the front axle of the wheel and the braking torque of the rear axle of the wheel, and introducing a predictive control model. According to the method, the arithmetic optimization algorithm is adopted to optimize the performance index of the first stage and the performance index of the second stage, and real-time control and optimization of prediction errors are achieved.