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Servo system has been applied in the executive mechanism of coaxial two-wheeled electric scooter pose control. The pose control requires high accuracy and strong robustness of the servo system. However, the characteristics of servo system based on linear PID regulator are not very excellent. To improve the performances, a novel servo system of permanent magnet synchronous motor (PMSM), based on active-disturbance...
Instantaneous energy balancing plays an important role in power electronics conversion. The unbalance of electromagnetic energy not only debases the system performance but also decreases the reliability and efficiency of the conversion. In this paper, instantaneous energy balancing problems in three-level neutral point clamped (NPC) converters are classified and discussed. Typical examples and their...
Rotor configurations strongly influence the performance of interior permanent magnet electrical machines. The aim of this paper is to compare and evaluate different rotor configurations for interior permanent magnet electrical machines. Based on the requirements of a medium single shaft hybrid electric bus, circumferential, radial, V-type and U-type rotor configurations have been designed out under...
CJY6470 parallel hybrid electric vehicle (CJY6470PHEV) is a light type off-road vehicle developed by the authors. Its energy management system (EMS) has been designed using the T-S fuzzy model and fuzzy control toolbox in MATLAB 6.5. In order to simplify the system, it is divided into the energy regenerative braking system (ERBS) and the EMS in the vehicle normally driving modes. As the relationship...
To meet the demand on precise control of electronic control in diesel engine, study on electronic control of cylinder pressure feedback in common rail diesel engine is made. On the basis of brief analysis for cylinder pressure physical meaning, mechanism and sketch of electronic control based on cylinder pressure feedback is presented, pressure characteristic variable orienting to control is provided,...
A yaw motion stabilization controller in Electric Power Steering (EPS) system is designed in this paper. According to the linearized four-wheel model of vehicle, a state observer of cornering state variables, such as yaw rate angle and slip angle. In order to improve the drive comfort and drive safety for EPS, a Yaw Rate Generator is designed and a yaw rate stabilization controller is constructed...
In the paper, a full-vehicle steering model is built based on the active suspension dynamics in steering system. In order to improve riding comfort and driving stability, the optimal full vehicle control technology is studied both in time-and frequency-domain. Considering the yaw, roll, pitch, vertical vibration of vehicle body and the deflection of suspension, a norm evaluation index Hinfin is defined...
As the conventional matrix converter has the drawback of low voltage ratio (max. 0.866), a novel matrix converter called z-source matrix converter is proposed, According to the topology of the different main circuits, they are called z-source indirect matrix converter (ZSIMC) and z-source direct matrix converter (ZSDMC). The basic configuration of the new topology and their fundamental principle are...
Regenerative braking system is the own system of electric and hybrid electric vehicle. The system can restore the kinetic energy and potential energy, used during start and accelerating, into battery through electrical machine. The total brake force is composed of friction brake force on front axel, friction brake force on rear axel and regenerative brake force when a vehicle equipped with regenerative...
To accomplish the demand of minimum fuel consumption and good power performance for continuously variable transmission (CVT) car. Aiming at the whole vehicle model including the engine, the clutch and the CVT, the dynamics mathematical model of CVT system is established according to different stages of clutch engaging, that the dynamic integrated simulation model is developed. A parameter self-adjusting...
A fuzzy control strategy is presented for the semi-active control of a quarter-car suspension system model based on a magnetorheological (MR) damper. The improved Bouc-wen model is used to describe the mechanical model of MR damper. We choose the modified genes of the fuzzy rules, the scale genes of the input variables and the scale gene of the output variables as the variables, and the weight values...
The vector control technique is applied in doubly fed induction generator (DFIG) according to the characteristic of AC-excited variable speed constant frequency (VSCF) wind power generation, a comprehensive control strategy is presented based on grid voltage orientation, which gets the same performances as stator flux orientation, but the stator flux observer can be omitted to simplify the control...
The purpose of this research is to develop an electric power steering (EPS) control logic which integrates base-assist, damping, return, and inertia control logic. This research also introduces a special method which employs the steering angle signal and the vehicle speed signal into the control logic to tune the compensation gain immediately. It can optimize the steering response and improve the...
A dual mechanical ports electric machine (DMPM) with clutch is used as an electrical variable transmission (EVT) in hybrid electric vehicle (HEV), as presented in, which can eliminate copper loss and iron loss in the inner motor when clutch is engaged. In this paper, the EVT system simulation model including the models of DMPM, clutch, internal combustion engine (ICE) and controller together, is constructed...
A new zero-voltage-transition (ZVT) soft-switching converter for brushless DC motor drives is presented. The proposed ZVT converter possesses the definite advantages that both main transistors and diodes can operate with zero-voltage switching (ZVS), unity device voltage and current stresses. It is a very desirable feature for high frequency switching power conversion where power MOSFETs are used...
For the direct torque control of induction motor, the flux weakening operation is required when the motor speed beyond the rated speed. The determining of flux weakening operation point is the key of up speed control. In this paper, the definition of stator flux maximum average synchronous speed is introduced to the direct control algorithm and the estimation formula is given as well. On this basis,...
This two-part paper presents the development an ISG diesel hybrid power-train to provide a solution for the city transit buses. The ISG power-train which adopts the ISG parallel configuration which is inserted a thin but powerful motor between the engine and the flywheel is a compact and flexible power-train with high efficiency and sufficient power. The drive demand of Chinese typical city cycle...
A two-seat electric vehicle weighing only 65 kg is possible through a unique structure consisting of a sandwich plate with the 4 wheels and a cabin similar to a safety helmet. Instead of doors the whole cabin is lifted up and swings back. Energy consumption and battery size are reduced to a minimum. A mechanical joystickrdquo is used for steering, power control and braking.
With the development of human-beingpsilas civilization, public transportation has achieved great progress, but more attention has to be taken for children, old men, and other people who are not convenient to take public traffic, LFLRV (low floor light rail vehicle) has so many advantages that it is a very good choice in the city for these people. This paper describes the traction system of the first...
Based on the benchmark of hybrid solutions adopted by most manufacturers in China, three hybrid electric car solutions, which are parallel system with ISG and single clutch (SCP), parallel system with ISG and dual clutches (DCP), and plug-in series system (PIS), are selected to be analyzed. A mid-size car is chosen as the baseline car for developing hybrid electric car. Based on ADVISOR software,...
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