Electromote south africa 50kw electric motor
In today's society, hybrid electric vehicle technology can effectively reduce vehicle energy consumption and emission in the short term. It is the best way to solve the current energy and environmental protection problems. Hybrid electric vehicles have developed by leaps and bounds in recent years. The research on hybrid power has always been a hot spot in today's society. With people's attention, various breakthroughs have been made in hybrid power.
In the field of technical research, the international popularity of four-wheel drive hybrid has never decreased. Almost all major automobile companies have studied hybrid vehicles and involved in the research of four-wheel drive vehicles. Among them, Toyota's Lexus series four-wheel drive motor cars are more recognized in today's society. Their performance is respected in the field of four-wheel drive vehicles all over the world, and their sales are far ahead in the world, Last year, the United States accounted for 54% of the share of four drive vehicles, but Honda's proposal of medium-sized vehicle immd once again brought new opportunities to the whole automotive field. The transmission model adopted avoided the monopoly of Toyota planetary coupling mechanism on patents, and the power scheme he proposed has some special advantages. At home, the pursuit of four-wheel drive has never declined. For example, the sales proportion of four-wheel drive vehicles has gradually increased recently, and domestic BYD has also launched its own new car "Tang", which shocked the whole industry and contributed to the development of vehicles. At the beginning, the state has relaxed the access principle of the electric vehicle industry, and all powerful large non automobile companies are ready to move, Prepare to join the automotive industry and make great achievements, such as Alibaba's research on Tesla Motors.
In the field of scientific research, Zeng Xiaohua of Jilin University directed the master's thesis on white pigeon four-wheel drive control strategy [1], the design of Lu Yupei's four-wheel drive power system scheme of Tongji University [2] Zhou SIgA of South China University of technology based on the four-wheel drive form of double rotor motor [3] Guo Yongbin of Nanjing University of Aeronautics and Astronautics' forward modeling and Simulation of four-wheel drive hybrid electric vehicle [4] have all made contributions to the four-wheel drive of hybrid electric vehicle, and carried out the whole vehicle design and Research on four-wheel drive. Among them, "Qianghua No. 1" led by Zhu Jianxin is presided over by Shenzhen Institute of advanced technology of Chinese Academy of Sciences The paper focuses on the optimization of four-wheel drive vehicle control strategy [5] and the research on wheel torque distribution strategy of four-wheel drive hybrid vehicle [6], as well as the research on the practical application of four-wheel drive hybrid car by Zhao Zhiguo of Tongji University, Its important concerns include the research on drive anti-skid control of four-wheel drive hybrid car [7] and drive mode switching control of four-wheel drive hybrid car [8], Foreign Studies on hybrid four-wheel drive vehicles include Avesta Goodarzi & Masoud Mohammadi of the University of science and technology of Iran to enhance the handling stability and fuel economy of four-wheel drive through the optimization of tire power distribution [9], Farzad tahami fuzzy logic control of four-wheel drive direct deviation time in Iran [10], Russell P. Osborn & Taehyun shim of the University of Michigan in the United States independently controlled four-wheel torque distribution [11], M. croft-white, University of Kleinfeld, UK, controls the four-wheel drive torque vector [12]. Zhao Zhiguo, Tongji University, etc. studied the driving mode switching mode of four-wheel drive hybrid electric vehicle, designed the undisturbed mode switching control strategy, and carried out simulation and real vehicle test to verify the effectiveness of the control strategy [13]. Zheng Hongyu of Jilin University proposed a regenerative braking control strategy that comprehensively considers the ideal braking force distribution and motor working characteristics. The proposed control strategy is simulated and verified by the joint simulation of CarSim and MATLAB / Simulink software. The simulation results show that the control strategy can obtain better braking energy recovery effect by effectively distributing the motor braking force and mechanical braking force of the front and rear axles [14].
Electromote south africa 50kw electric motor
Whether in application or in scientific research, the scheme and implementation of four-wheel drive are increasing, and people's attention is also focusing on the direction of four-wheel drive. The hot spots of four-wheel drive research mainly include: 1 The design of power train, typical Toyota coupling mechanism, rear axle and adding a motor to realize timely 4WD, and the design of Honda's dual motor and clutch to realize timely 4WD. 2. Design of handling and stability. At present, the research in this field mainly focuses on the control of vehicle deviation time and the realization of power distribution when turning and poor road conditions. 3. The design of fuel economy focuses on the application of optimization methods and the realization of energy regeneration process. The main solution to the above problems is the application of control strategy. The control strategy and structure of hybrid electric vehicle determine the driving performance of the whole vehicle. At the same time, Shu Hong pointed out that the control strategy should not only achieve the best fuel economy of the whole vehicle, but also take into account the requirements of engine emission, battery life, driving performance, reliability of various components and cost of the whole vehicle, According to the characteristics of various components of hybrid electric vehicle and the operating conditions of the vehicle, the research on the optimal control strategy to achieve the best matching of engine, motor, battery and transmission system, taking into account the requirements of the above aspects, is a research focus in the future [15].
In view of the above research, we analyze the important literature at home and abroad:
Research on wheel torque distribution strategy of 4WD hybrid electric vehicle [6]
This paper introduces a new 4WD hybrid vehicle configuration with both hub motor and ISG motor, sets up a variety of timely four-wheel drive modes, and formulates the corresponding energy distribution and wheel torque control strategies. Through reasonable oil-electric fuzzy logic control and ISG motor's balance control of battery pack SOC, the overall energy conversion efficiency is improved, which not only optimizes the engine operating conditions and battery working conditions, It also improves the trafficability of the vehicle.
The whole article draws a conclusion through the topology, driving mode design, energy distribution and control strategy of 4WD system, test and comparison results. This article mainly focuses on the design of the whole vehicle and the design of control strategy in the process of timely four-wheel drive vehicle design. At this time, the hub motor can give play to the advantages of direct control of the hub motor, test and demonstrate the smoothness of switching between modes, fuel economy and emission reduction, and demonstrate the improvement of the performance of the newly developed vehicle.
Electromote south africa 50kw electric motor
Optimization of four-wheel drive vehicle control strategy [5] Based on the structure platform of four-wheel drive hybrid electric vehicle with ISG starting motor and hub motor, the Freescale single chip microcomputer mc9s12dp512 with 512 KB flash memory is selected as the CPU of the controller, and the control strategy is written and tested on site in the development environment of co de warrior v4.5 This strategy is mainly based on the electric auxiliary control strategy and integrates the fuzzy logic control and SOC balance control, which not only improves the driving smoothness of the vehicle, but also optimizes the operating point of the engine and the working state of the battery [5].
Qianghua No. 1 is a new hybrid car developed by Shanghai Jiaotong University under the auspices of Shenzhen Institute of advanced technology, Chinese Academy of Sciences The vehicle adopts a special four-wheel drive system. In this paper, the author establishes the whole vehicle model, controller and hardware design, software model, control strategy and control strategy optimization. The simulation is realized by ADVISOR2002 software to verify the improvement of the performance of the control strategy. The development and research of the control strategy of the vehicle controller has played a positive role in reducing the cost of hybrid electric vehicles, increasing the reliability of system operation, improving power performance, fuel economy and reducing emissions,; In addition, the vehicle transits smoothly during starting, running, idling and parking without uncomfortable feeling. In the learning process of control strategy, we can learn from the design process of control strategy. The structure of control strategy in this paper is as follows:
Research on anti slip control of four-wheel drive hybrid car [7]
Multiple power sources increase the regulation mode of driving wheel torque of hybrid electric vehicle, and also bring new challenges to the acceleration slip regulation (ASR) implemented by relying on conventional anti lock braking system (ABS). For the four-wheel drive hybrid car, considering the nonlinear 7-DOF vehicle longitudinal dynamics, the forward simulation model of the sample vehicle powertrain is established [7]. The motor with accurate torque control and fast response is used to adjust the torque of the skidding wheel. Based on the verified energy management strategy, the logic threshold and P-FUZZY-PI multi-modal segmented ASR control algorithm are developed, and the off-line simulation is carried out under the driving conditions of pure electric starting and hybrid drive rapid acceleration on the road with low adhesion coefficient. The signal of the front wheel speed sensor is introduced through the whole vehicle electronic control unit (HCU) and the ASR function is integrated to carry out the real vehicle pure electric starting anti-skid test on the ice and snow road. The simulation and test results show that the two ASR control strategies can effectively suppress the instantaneous slip of the driving wheel. It is feasible and effective to develop the ASR control algorithm based on the energy management strategy and implement it through HCU.
Electromote south africa 50kw electric motor
The power system configuration and component model of the sample vehicle are established to develop the ASR control strategy based on the energy management strategy
The established controlled object model consists of powertrain model and vehicle longitudinal dynamics model. The powertrain model is established by engine, battery, ISG motor, hub motor and other components according to the signal and power transmission relationship, and the vehicle longitudinal dynamics model mainly includes vehicle model and tire model.
During the control implementation of ASR based on energy management, the implementation and effectiveness are verified under HCU control under different experimental conditions. The designed logic threshold and P-FUZZY-PI multi-modal segmented ASR control algorithm can effectively suppress the instantaneous slip of the driving wheel and greatly shorten the starting acceleration time [7]. This paper realizes the control of driving anti-skid by using logic and fuzzy control, and verifies the improvement of performance through real vehicle experiments under the condition of straight-line driving.
Driving mode switching control of four-wheel drive hybrid car [8]
There are many driving modes in hybrid electric vehicles. The coordinated control of output torque of relevant power sources in the process of mode switching has an important impact on vehicle power performance and driving performance. Taking the four-wheel drive hybrid electric car as the research object, aiming at the deterioration of driving performance caused by mode switching in the driving process, this paper focuses on the switching process from pure electric to four-wheel hybrid drive mode, and designs the undisturbed mode switching control strategy considering the difference of dynamic characteristics between engine and hub motor in the process of power coupling. The forward simulation model of four-wheel drive hybrid car is established on the software platform of MATLAB / Simulink / simdriveline to simulate the performance of mode switching control strategy. The real vehicle and simulation experiments show that the control strategy ensures the stability of power transmission in the process of mode switching, effectively suppresses the longitudinal impact caused by dynamic coupling, and improves the driving performance of four-wheel drive hybrid car on the premise of meeting the driver's required torque.
The article is divided into four parts: 1 Vehicle model, 2 Control strategy, 3 Simulation experiment, 4 Real vehicle experiment, 5 Conclusion. The key components of the vehicle model and control strategy model are as follows:
Electromote south africa 50kw electric motor
In this paper, the driving mode of the vehicle is divided into engine drive, pure electric drive, wheel hub motor assisted four-wheel hybrid drive, auxiliary front wheel hybrid drive, full hybrid four-wheel drive, etc. the author realizes the switching of four-wheel drive mode through the control process, and verifies the stability in the switching process of four-wheel drive mode through simulation and real vehicle experiment. The improvement of its performance is analyzed through the chart output from the simulation experiment. The existing problems in this paper only study the one-way switching mode, not the reverse switching mode. The paper mentioned that there is a problem of unstable switching in the process of mode switching, especially in the process of pure electric to engine mode switching.
Enhance the handling stability and fuel economy of hybrid four-wheel drive through the optimization of tire power distribution [9]
In this article, the author improves the performance of hybrid four-wheel drive from fuel economy and stability respectively. The realization of its control performance is mainly based on an integrated controller with three-layer control structure. The first layer is the control of deviation time, the second layer is the optimization of tire dynamic force distribution, and the third layer is the executive component. The optimal control theory is adopted in the control. The optimal control is obtained by using Riccati equation and some parameters are set.
In the second layer of the article, the realization of joint control is proposed. The first generation is the joint control of direct deviation time and four-wheel steering, which is mainly to improve the stability and maneuverability of the vehicle. The second generation is the joint control of direct deviation time and four-wheel steering, and then add the control of minimum fuel economy. The simulation comparison is carried out to illustrate the improvement of the control in slip angle and slip rate, and then the data and curves in different processes are tested through experiments, Verify the improvement of vehicle control performance in the steering process, the improvement of vehicle handling stability on special roads, and the improvement of vehicle fuel economy through different working conditions.
