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Direct torque control using space vector modulation (DTC-SVM) is one of the most popular control methods of induction motor for electric vehicle (eV). This paper proposes DTC-SVM with improved deadbeat control. During uphill and downhill, instant torque changes is problem for drivers. The principle of the developed method is a solution to overcome the torque need on unexpected road conditions. In...
The simulation of a direct torque hysteresis controller (DTHC) driving an interior permanent magnet synchronous machine (IPMSM) is presented in this paper. The underlying switching concept as well as a proposed experimental setup is discussed. Various simulations, varying the torque and current tolerances, are carried out in the low torque and high torque range. Simulation results show a direct influence...
In electric and hybrid-electric vehicles, the inverter output voltage is limited by available DC-link voltage, which restricts the vehicle speed and acceleration. Therefore the fundamental component of the motor voltage should be increased by operating inverter in the six-step mode at high speeds. Although hysteresis based direct torque control (DTC) is a straightforward approach and has several advantages,...
The application of a direct torque hysteresis controller (DTHC) driving an interior permanent magnet synchronous machine (IPMSM) in the dynamic state is presented in this paper. The underlying switching concept as well as a proposed experimental setup is discussed. Positive and negative torque setpoint steps are simulated in the low torque and high torque range. Simulation results show that the number...
In this paper, a direct torque hysteresis controller (DTHC) driving a permanent magnet synchronous machine is discussed. A two-level, three-phase conventional inverter is used as means of power conversion. Advantages such as a low switching frequency as well as further opportunities of the DTHC are specified. The simulation results show a high degree of potential for the DTHC in future applications.
Drive technology and Control System of Electric Vehicle with TMS320LF2407A DSP as microcontroller are mentioned in this paper. The system takes permanent magnet syncronous generator as the driving motor, utilizing the direct torque control technology of SVPWM. Electric Vehicle are rearly driven by two wheels, which only needs to control one permanent magnet syncronous generator, and then it will be...
This paper proposes a traction drive system for electric vehicles (EVs) with two separate induction motor drive-based wheels. In this case, an electric differential (ED) is developed. To handle EV stability while cornering or under slippery road condition, the proposed traction drive uses direct torque control and an adaptive-flux-and-speed-observer-based algorithm. EV-specific experimental tests...
Direct Torque Control is a control technique used in AC drive systems to obtain high performance torque control. The conventional DTC drive contains a pair of hysteresis comparators, a flux and torque estimator and a voltage vector selection table. The torque and flux are controlled simultaneously by applying suitable voltage vectors, and by limiting these quantities within their hysteresis bands,...
There are some problems of torque ripples and flux ripples and current ripples in traditional direct torque control (DTC). System with speed sensor has lower reliability and higher system cost. To solve these problems, an extended Kalman filter(EKF) was established to observe stator flux linkage and estimate motor speed, thus speed sensorless direct torque control for asynchronous motor was realized...
This work focuses on providing sensorless DTC for IPMSM with minimum torque ripple and at the same time with a simple algorithm to be implemented with hardware. The developed algorithm method follows the principle of steering that corrects the direction of vehicle from deviation. The algorithm uses the output of two hysteresis controllers used in the traditional HDTC to determine two adjacent active...
This paper provided a way for simulating the electrical vehicle's inertia by using the electrical dynamometer. The way to simulate the electrical vehicle's inertia is to match the torque that should be present in a given road condition and use torque feedback to the motor controller to maintain the proper amount of torque. Using an asynchronous motor as the load machine (LD), which is based on direct...
Indirect field oriented control (IFOC) and direct torque control (DTC) have been widely commercialized in induction motor drives, with each being favored by its supporters. In this paper, the dynamic performance of these drives for an electric vehicle application is examined, and sensitivities to parameter variations affecting this dynamic performance are explored. Key performance measures include...
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...
In order to improve dynamic performance and reduce switching loss of permanent magnet synchronous motor system in electric vehicle drive, a self-adjusting direct torque control strategy is proposed. Based on the analyses of zero voltage vector in DTC, fuzzy control rules with zero voltage vector are presented to acquire both quick dynamic torque response of PMSM and reduced switching loss of inverter...
The aim of this paper is to presents a traction system algorithm for electric vehicle (EV) with two separate wheel drives. This algorithm is necessary to improve the handling stability of EV during cornering or under slippery road condition. This algorithm considered, first the elimination of the conventional mechanic differential used in the internal combustion engine vehicles (ICEVs), second the...
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