The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
For the special conditions such as underground, dusty, hard maintenance environment of mine area, ac motor, which overcomes some drawbacks of dc motor, is definitely the best choice for mine locomotive. This paper compares characteristics between dc drive and ac drive, and presents an ac drive system for mine locomotive. The full digital control, including slip frequency control in digital signal...
According to the essential reasons for equipments failure of diesel locomotive, the shortages of present calculating method of overhaul cycle of diesel locomotive are analyzed. Simultaneously, a new overhaul cycle model based on the stress analysis is presented. This model adopts Miner Criterion and reliability theory to estimate the equipmentspsila maintenance life-time of diesel locomotive and to...
The dual motor powertrain (DMP) configuration is composed of gasoline direct injection (GDI) engine, two motors(one motor connects with input shaft of transmission, namely I-motor, another motor connects with output shaft of transmission, namely II-motor), automatic mechanical transmission (AMT), battery package and hybrid control system. The DMP hybrid system has the functions of engine start/stop...
This paper systematically discussed the design and control methodology of plug-in hybrid electric vehicle (PHEV). Design methodology focused on battery energy and power capacity design. Two lands of typical batteries-NiMH and Li-ion have been discussed. Control strategies focused on all electric range (AER) and charge depletion range (CDR) operations. Also, a constrained engine on and off control...
In this research, automatic navigation control system is developed for agricultural electric power vehicles. Electric power steering (EPS) systems have many advantages over traditional hydraulic power steering systems in engine efficiency and space efficiency. So the electric power vehicle for experiment equips EPS system. Navigation control method, fuzzy control steering and path planning are discussed...
The aim of this paper is to present a method to carry out a vehicle transmission simulator coupled to a vehicle dynamic model. The transmission simulator uses electric actuators with dedicated control laws to reproduce the mechanical characteristics of the real vehicle transmission chain. In order to improve the control law robustness of this electric simulator a sliding mode control is used. The...
When interfered suddenly, the regular signal would appear weak mutation, which is typical transient signal. Itpsilas difficult to detect the start and terminative time by conventional time-frequency analysis methods. Empirical mode decomposition (EMD) is a nonlinear analysis method, which can emphasize signalspsila instantaneous characteristics and can decompose multi-component signals into different...
This paper deals with the optimized control strategy within the vehicle which is driven by a fuel cell stack hybrid with a NiMH battery. The aim is the instantaneous energy management to optimize the hydrogen consumption. At first the powertrain was modeled using data on testbed. Then the optimization control problem basing on an equivalent hydrogen consumption strategy is defined, where the motor...
A novel inverter output filter based on DC magnetic flux controllable inductor can change its inductance according to different working states of AC variable frequency speed regulating control system, appropriately by adjusting the power applied on the inductor DC control coils. A better filtering effect and better electrical driving effect thus can be achieved. The unique structure inductor has advantages...
An improved pulse-width modulation (PWM) strategy with two-phase modulation is proposed for inverters in electric vehicle. By properly selecting the clamping phase in each PWM cycle, no switching occurs when the corresponding phase current is around its peak value, thus the switching loss will be significantly reduced. Meanwhile, the peak-to-peak value of the common-mode voltage (CMV), which leads...
Double-side tabular permanent magnet linear synchronous motors (PMLSM), which is incorporated with high power pulse technology, so as to be high power pulsed-PMLSM (PP-PMLSM), is mainly applied in the aspect of short-term acceleration. Under large current, the motor generates high instantaneous thrust and accelerates the load immediately to the expected velocity. The high winding current density and...
Based on the characters of city bus, series hybrid powertrain featuring dasiaAuxiliary Power Unit (APU) + Super capacitor (SC)psila is recommended. With the proposed powertrain configuration, this paper develops a dual-power system for hybrid city bus. The constitution, working principle and relevant control strategies of the system are introduced in details. A novel dual-power structural system was...
Redundant structures are often used for improving the reliability of electrical systems in aircrafts. In the paper, an electro-mechanical actuator (EMA) with hybrid redundant structure is researched for more-electric aircraft (MEA). This kind of EMA combines electric redundancy and mechanical redundancy. It has two dual-winding brushless DC motors (BLDCM) driven by four sets of power circuits. The...
Low cost, high reliability, low weight and competitive efficiency combine to make the switched reluctance motor (SRM) drive a strong candidate for application in future electric vehicle (EV) propulsion systems. In this paper , a three-phase 6/4 structure switched reluctance motor used in small size EV is proposed. Start performance and output property are both improved through optimizing the stator...
This research proposes an automatic parking system (APS) with a good maneuver performance for vehicle. The proposed configuration of the APS includes sensors information fusion, position estimation, path planning, and tracking algorithm. The on-vehicle verification demonstrated by means of the control of an electric power steering system for tracking the planned path. Parking space is measured up...
This paper focus on the problem that the current 14 V power system has limited the application of electric device and the turbocharged diesel engine can not produce enough torque under the low speed condition, and as well as high smoke when accelerating. To solve these problems we propose the 42 V power system, its motor can not only act as the starter and the alternator but also can improve the torque...
According to the measurement of the Ni-MH battery electrochemical impedance spectroscopy (EIS) and the relationship of the OCV-SOC , one basic equivalent-circuit model structure including hysteresis voltage for Ni-MH battery is presented, which can be applied for the estimation of battery state of charge (SOC). The model approach is evaluated by comparing the measured and the simulated battery voltage...
This paper presents a new kind of direct torque control (DTC) system based on the inverter with double-frequency for the motor drives of electric vehicles (EVs). According to the theory of the converter with double-frequency, the topology of a new kind of inverter with double-frequency is derived, and the operation states of the new circuit are analyzed. This kind of inverter has good dynamic and...
With the increasing concern of gas emission, climate change and energy crises, electric vehicles (EV), especially fuel cell hybrid electric vehicles (FCHEV), develop rapidly in current days. Meanwhile, permanent magnet synchronous motor (PMSM) drive systems are widely used in EV because of their advantages in wide speed ranges, high efficiency and power density. However, limited by manufacture technology...
A dual electric machines hybrid electric bus is investigated in this paper. The mechanical clutch and the manual transmission fixed in a conventional bus are replaced by dual electric machines in the novel system, which work as an electromagnetic clutch and a continuously variable transmission simultaneously. The basic operation coordinated control for the system components is implemented to satisfy...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.