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Three different strategies based on a theoretical model were used to simulate engine start process respectively, start in constant speed without compensation, start in constant speed with compensation, normal start. Predication results are presented here. Bench tests were also carried out, which are related to the three control strategies. It is found that the start in constant speed with compensation,...
This presentation evaluates the contribution of software integration for simulation-based analysis and robust design automation of fuel cell electric vehicle cooling system. The different topics taken into consideration were the building of the external flow field analysis model of the fuel cell electric vehicle, the method of software integration for simulation-based analysis, the optimization of...
Typical calibration system of ASAP (Working Group for the Standardization of Application Systems) architecture is strong coupled where calibrating software is integrated with functional software of ECU (Electronic Control Unit), and it is inconvenient for compatibility and interchangeability of calibration tool and ECU. A solution of weak coupled calibration system architecture is presented to the...
This paper presents a novel direct power controlled dual stator-winding induction generator (DWIG) system. The voltage control mechanism of the DWIG is analyzed, based on which the influence of the control winding instantaneous power on the output dc voltage is disclosed. The strategy of the direct power control (DPC) for the DWIG is proposed. No inner current loops and no PWM modulator block are...
The energy system consists of batteries and/or ultra-capacitors and BMS. Different type of EVs needs different energy system. The energy system is the key to the future of new energy vehicles including pure electric vehicle, hybrid vehicles and plug-in hybrid and fuel cell vehicles etc.. The paper will present the state-of-art of energy system for new energy vehicles around the world especially in...
The plateau environmental quality while vehicle engine using was generalized. The influence of plateau environmental condition on vehicle engine characteristics was analyzed. The proving test program of vehicle enginepsilas plateau compatibility was given based on the analysis of the influence of plateau environmental condition on vehicle enginepsilas performance and compatibility. By using the improved...
In this paper, based on a battery pure electric city bus, principle researches have been offered on the parameters matching of the power-train and main components. The vehicle system was designed integrated, and then simulation platform was developed and established. The dynamic and economy performance can be predicted based on the above work, results show that the designed pure electric city bus...
In this paper, a novel model for surface-mount PM (SPM), which takes the iron losses and machine parameters variation into account is presented. If the voltage of the copper resistance is ignored in the electric drive running at a high speed, the traditional equivalent circuit with a serial and parallel circuit could be transformed into a simple parallel circuit. The phasors diagram and two-axis equivalent...
Regenerative braking is an important function for a hybrid electric bus with many stop-to-go drive conditions. Yet an accurate nonlinear model for the composite brake system in HEV and a nonlinear model-based control design for a series-parallel hybrid electric bus have not been fully studied. This paper describes the brake system with regenerative braking function, and a special brake pedal is applied...
The analysis of statistic data collected from real-time driving cycle of electric vehicle in demonstrating area is providing evident that some driving cycle conditions have significant influence on vehicle performance. In addition, vehicle performance results derived from driving cycles data show relationships that help to optimize control strategy. Statistical acceleration and deceleration distributions...
This paper proposes a zero-voltage and zero-current-switching three-level (ZVZCS TL) DC-DC converter using passive clamping circuit to reduce switching loss, improve current trails of IGBT and improve the converter efficiency. The proposed TL converter can achieve effective zero-voltage switching (ZVS) for the TL leg and zero-current switching (ZCS) for the two-level leg. By using the passive clamping...
A novel method for seawater desalination based on the rotation coupling electromagnetic theory is proposed and the concept of electric mesh grid is given. The desalination function of electric mesh grid is realized by the electric field which is produced by network of high-density with the charge of the contrary sign. The process principle of electric mesh grid is introduced. The field distribution...
To improve the torque performance of wheel motor, a concentrated winding motor with 12-slot-10-pole, embedded magnets rotor structure is presented in this paper. The influence of motorpsilas parameters such as the PMpsilas magnetization orientation length, the winding turns and inner diameter of stator on output torque is discussed by using finite element method. The design method of increasing motor...
Permanent magnet synchronous motor (PMSM) driving system used in electric vehicles get a lot of development in recent years. A PMSM with variable magnetic reluctance in the exciting circuit by the movable permanent magnet in permanent-magnet slot is presented. Flux weakening is accomplished by reduction of effective magnetic flux area provided by permanent magnets duo to the variable magnetic reluctance...
Contact-less electrical energy transmission system (CEET) becomes more and more attractive for various applications. A coreless detachable transformer used for CEET is investigated in this paper. Equivalent circuit model of detachable transformer was established and analyzed. And the flux distribution of the proposed detachable transformer was attained using finite element method (FEM). The flux simulation...
The paper aims at parameter matching problems of single-axle PHEV (parallel hybrid electric vehicle) in the early stage of the design, fuel economy as the design object, and presents the parameter selection criterion of the engine, motor and battery in the dynamic system. The scope of the enginepsilas power is determined by calculating the economic cruising power of the engine, the load characteristics...
This paper presents a new permanent magnet double-stator integrated-starter-generator (ISG) for hybrid electric vehicles (HEVs). Compared with conventional PM electric machines, it has the advantage that currents of both the inner and outer stators produce electromagnetic torque and two air-gaps can deliver the output torque, thus improving the torque density and providing a high starting torque for...
Exploration vehicle is required to run independently to perform the tasks. In order to improve the ability of obstacle surmounting, a new type of wheel-tracked moving system applied on exploration vehicles was presented. And a new method to analyze the kinematics relationships between the tracks and the bodywork were also presented. Then the kinematics model of the exploration vehicle was built and...
This paper proposes an extended Luenberger observer (ELO) for speed sensorless vector control of induction motor drive fed by a three-level neutral point clamped (NPC) inverter. Two simple methods for observer gain selection are proposed, which eliminates the speed dependent items and decreases the relevant errors caused by observed speed. Conventional speed adaptive observer observes only flux and...
A driving force control method suitable for front-and-rear-wheel-independent-drive-type electric vehicles (FRID EVs) is described. This method can prevent the occurrence of wheel slip while driving on dangerous roads having a low-mu surface. The method can distribute the driving and braking torque to the front and rear wheels depending on the driving conditions of the vehicle and road conditions....
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