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The Research of Control Strategy Based on EV PMSM

Author: JiaPu
Tutor: ZhouYaFu
School: Dalian University of Technology
Course: Vehicle Engineering
Keywords: Permanent magnet Drive circuit Motor controller vector control basedon Torque-Speed MAP
CLC: TM341
Type: Master's thesis
Year: 2013
Downloads: 330
Quote: 0
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Abstract

With the increase of car ownership in the world, energy consumption and environmental issues are taken more and more attention by the governments around the world. In order to solve the energy and environmental problems due to the automotive development, governments vigorously support the development of new energy vehicles. The automotive industry is experiencing a shift from the traditional internal combustion engine vehicles to the emerging new energy vehicles. Electric vehicles as a kind of new energy vehicles, including battery electric vehicles, hybrid vehicles and fuel cell vehicles.hybrid vehicles which is now the most marketable electric vehicle is a form that stands for a transition from traditional internal combustion engine vehicles to pure electric vehicles.Either for hybrid vehicle or pure electric vehicle the motor drive system is very important. A good motor drive system not only relates to the performance of the vehicle power play, also affects the vehicle’s reliability, security. Therefore, the motor drive system is becoming the focus research point for universities and research institutions. This article uses electric car drive of permanent magnet synchronous motor control method as the research object, expand the research work.Firstly, gives an overview of the development of electric vehicles at home and abroad, the development of domestic and international situation of permanent magnet motor, the development of drive motor control strategy. Analysis three coordinate transformations and establishes a mathematical model of permanent magnet motor in the three coordinates. Elaborates Vector control and direct torque control principle, control strategy and implementation methods.Then, selects Saber software to do IGBT driver circuit overall simulation to solve the problem of floating simulation that a number of simulation software can not do. and based on that designs the IGBT driver circuit.Designs and develops the controller of a permanent magnet synchronous motor drive system from both hardware and software aspects. On the hardware aspects uses Microchip Series the dspic control chip as the master chip, combined with the design of the peripheral system protection circuit, the temperature detection circuit design, the PWM signal output circuit design, the inverter circuit design, the rotor angular position and speed detection circuit that forms circuit assembly of the controller. On the software aspects including control program designing and host computer monitoring program designing. Completed the design of the drive system controller, and laid the foundation for the development of a new control algorithm.a new control strategy. Finally, based on a permanent magnet synchronous motor drive system controller to build a test bench, then proposed a vector control method based on Torque-Speed MAP. Though calibration experiments to determine the optimal space voltage vector and phase angle, and makes speed torque with the corresponding MAP of optimal space voltage vector into the form of tables for motor control querying to achieve vector control. This control method can circumvent the uncertainty caused by the current sensor and improve the rapidity,stability, efficiency of the motor control.

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